阅读理解 My father was a cemetery(公墓)keeper.When I was a child,he often took me there.Before we left each time,he would lay some stones on some graves(坟墓).I never asked why.I just thought that was his work. Yesterday, I visited my sick father. He asked me to go to the cemetery and lay some stones. For some reason, it had to be done that day. I agreed. I hadn't been there for a long time. When I got there, I found a woman in front of one of the graves I would lay a stone on.As I went to lay it, I heard her whisper" Thank you". It was then that I noticed the date of death on the grave was that same day. The grave was that of a child, only five when he died fifteen years ago. " He's my son, "she said. " But, where's your father? He was always the one to leave the stone." I told her that my father was ill but he asked me to do this. It seemed important to him."Your father's kindness means more to me than anything else. When my child died, I came often to see him. It is our custom to leave a stone. It tells the one who is here that he is thought of. But, then we moved away from here.. so many painful memories.. I was so afraid that he would be alone. But your father marked the grave every time he came. Each time I returned here, I saw that stone and it always comforted me. Your father is the kind of man who would ease the pain of a mother's heart though we are strangers. Just tell him you saw me today, won't you?" She said. It took me a minute to find my voice. That small stone marked the grave of a child and the heart of his mother. (1)The underlined phrase" some reason" in Paragraph 2 refers to(指代)　 　. A. the writer had been away from the cemetery for a long time B. the woman's child died on that day fifteen years ago C. the writer's father was always the one to leave the stone D. the writer's father would meet the woman that day (2).What does the underlined word "ease"in Paragraph 5 mean?　 　 A. Increase B. Cause C. Reduce D. Express. (3)According to the passage, we can infer(推断)　 　. A. the writer understood his father in the end B. laying stones was part of a cemetery keepers work C. the woman knew the writers father well fifteen years ago D. the stone marked the grave of a child and the heart of his mother (4)What's the best title of the passage?　 　 A. A Strange Custom B. One Small Stone, Unforgotten C. A Cemetery Keeper D. Painful Memories, Unforgotten

制造钢铁零件时可以把零件放入含碳的渗碳剂中使碳分子渗入零件的表面层增加零件表面的硬度．这种渗入现象说明

下列实验操作正确的是

下列与压强有关的事例的解释中正确的是

高钙牛奶中的钙应理解为

IremembermyfirstChristmasadventurewithGrandma.Iremember1tearacrosstownonmybiketovisitheronthedaymybigsisterdroppedthebomb.ThereisnoSantaClaus.Shelaughed.Evendummies傻瓜knowthat!I2fleetoGrandmabecauseIknewshewouldbestraightwithme.Shealwaystoldthe3true. NoSantaClaus?shesaid.Ridiculous!Don'tbelieve4.Putonyourcoatandlet'sgo.GowhereGrandma?Iasked. 5wewalkedthroughthedoorsofthegeneralstoreGrandmahandedmetendollarsandSaidBuysomethingforsomeone6needsit.I'llwaitforyouinthecar. Iwasonlyeightyearsold.NeverhadIshoppedforanythingallbymyself.ForafewmomentsIjuststoodthere7wonderwhattobuyandwho8buyitfor.IthoughtofeverybodyIknew.ThenIthoughtaboutBobbieDecker. Hewasmyclassmatewithbadbreathand9messhairandhesatrightbehindme.Hedidnothaveacoat.Iknewthatbecauseheneverwentouttoplaygamesduringthewinter.Ifingeredthebillwithgrowing10excite.IwouldbuyBobbieacoat.

如图是恒温下模拟海水晒盐的过程示意图根据图示判断正确的是

生物的遗传信息蕴藏在核酸的碱基排列顺序之中．请回答 1理论上含n个碱基对的DNA具有4n种随机排列序列这些序列填能或不能皆在生物体内检测到． 2T2噬菌体侵染大肠杆菌后其遗传信息传递过程需利用的酶有答出三种．确保遗传信息准确传递的原因有答出一点． 3遗传信息传递过程中也会出现差错其在进化中的意义是．两种生物的DNA分子进行杂交可形成杂合双链区若形成杂合双链区的部位越多从进化上说明这两种生物的亲缘关系越近原因是．

使用三效催化转换器可将汽车尾气中的有毒气体转化为无毒气体部分微粒变化过程如图描述错误的是

塑料梳子梳头时头发容易被梳子粘起下列现象中粘的原因与其相同的是

有一种电动玩具鱼如图所示内部电路主要有电源小型电动机和小灯泡构成．白天开关S1闭合S2断开时只有电动机工作玩具鱼将会游动晚上开关S1和S2都闭合时电动机和灯泡都工作玩具鱼既游动又发光不玩时只需将S1断开．下列电路设计符合这种要求的是

为及时发现燃气泄漏常在燃气中加入少量有特殊气味的乙硫醇C2H5SH乙硫醇在煤气燃烧过程中也发生燃烧其反应如下2C2H5SH+9O24CO2+6H2O+2X下列关于X的说法正确的是

某植物组织含有果胶淀粉和纤维素等成分某科研小组开展对该植物组织相关成分以及相关酶综合利用的研究请回答 1果胶存在于该植物组织的果胶酶是分解果胶的一类酶的总称包括． 2在淀粉分离提取研究中为促进淀粉沉降需添加生物制剂乳酸菌菌液．为了获得较纯的乳酸菌菌株通常采用操作该操作的目的是． 3纤维素分解菌是高效利用该组织纤维素的菌种．筛选菌种时需到富含纤维素的环境中去寻找说明了在自然界寻找各种目的菌株时遵循的共同原则是．为确定得得到的菌株是纤维素分解菌可采用对纤维素酶分解滤纸后产生进行定量测定． 4若要将纤维素分解菌固定化不适宜采用物理吸附法的原因是．

OnThanksgivingDaythousandsofrunnersgatheredfortheannualmarathon.ItisthelargestholidayraceinCalifornia1folksofallagessizesshapesand2. Thegun3andweallinchedourwayundertheballoonarch拱形物.Runnerspushedfor4elbowingtheirwaythroughthecrowd.Ijust5tomyselfandfeltgoodabouttakingpartintheevent. Beforelongmy6turnedtodepressionasaseven﹣year﹣oldkidpassedbyme.Iwas7awomanwhomustbe10yearsolderthanme.Thesenseof8heatedupandsodidmy9.IforgotthatIalreadyranmanymilesandhad4.2milesleftto10.therunnersaroundmesetmypace. SuddenlyasImadeaturnaninspiringsight11me.Ayoungmanwithoneleg12inthesunwasgongatan13pace.Thementallegwasattachedtohisthigh大腿.Hewas14ofanyonewhopassedhim.Hewasrunninghisown15athisownpace. Isloweddownand16alessonfromtheman'sperformance.Ifinished17thepaininmyknee.Waybehindthesilver﹣hairedlady.Farbehindtheseven﹣year﹣oldkid.Itdoesn't18.Itismyraceatmypace.Anditisagreatdayfortherace. Howmanytimesdoweletotherssetthepace19ourowngoalsourabilities?Howmanytimesdowe20oursuccessorourfailurebywhatothershavedone? 1A.honoring B.influencing C.attracting D.directing 2A.ways B.abilities C.grades D.results 3A.wentby B.wentout C.wentup D.wentoff 4A.water B.time C.position D.condition 5A.smiled B.drank C.lied D.kept 6A.anger B.joy C.sadness D.honesty 7A.knockingdown B.comingacross C.runningpast D.fallingbehind 8A.competitiveness B.justice C.responsibility D.humor 9A.friend B.companion C.balloon D.pace 10A.go B.come C.leave D.start 11A.worried B.pleased C.struck D.satisfied 12A.dropping B.rising C.shining D.kicking 13A.anxious B.curious C.lazy D.afraid 14A.tired B.unaware C.fond D.afraid 15A.business B.risk C.destination D.race 16A.learned B.offered C.finished D.provided 17A.upon B.under C.despite D.for 18A.work B.matter C.fit D.hurry 19A.pursuing B.ignoring C.reaching D.setting 20A.judge B.achieve C.miss D.forget

@@.1．2分如图手机与音叉的位置保持不变利用手机软件测出音叉发出的声音从50dB变为30dB．说明音叉发出的声音选填音调响度或音色变小．

TheBrownBear MywifeLauraandIwereonthebeachwiththreeofourchildrentakingpicturesofshorebirdsnearourhomeinAlaskawhenwespottedabear.Thebearwasthinandsmallmovingaimlessly. JustafewminuteslaterIheardmydaughtershoutingDad!Thebearisrightbehindus!Anaggressivebearwillusuallyrushforwardtofrightenawayitsenemybutwouldsuddenlystopatthelastminute.Thisonewassilentanditsearspinnedback﹣﹣﹣﹣thesign迹象ofananimalthatisgoinginforthekill.AnditwasacoldAprilday.Thebearbehavedabnormallyprobablybecauseofhunger. Iheldmycameratripod三脚架inbothhandstoformabarrierasthebearrushedintome.Itshugeheadwaslevelwithmychestandshouldersandthetripodstuckacrossitsmouth.ItbitdownandIfoundmyselfsupportingitsweight.IknewIwouldnotbeabletoholditforlong. EvensothiswasafightIhadtowinIwasallthatstoodbetweenthebearandmyfamilywhowouldstandlittlechanceofrunningfasterthanabrownbear. Thebearhitatthecameracuttingitoffthetripod.Iraisedmyleftarmtoprotectmyfacethebeastheldtightlyonthetripodandpresseditintomyside.MyarmcouldnotmoveandIsensedthatmybonesweregoingtobreak. DrawingbackmyfreehandIstruckthebearashardasIcouldforfivetosixtimes.ThebearopeneditsmouthandIgraspeditsfurtryingtopushitaway.Iwasactuallywrestling扭打withthebearatthispoint.Thenassuddenlyasithadbegunthefightended.Thebearmovedbacktowardtheforestbeforereturningforanotherattack﹣﹣﹣﹣﹣ThefirsttimeIfeltpanic. Apparentlysatisfiedthatwecausednofurtherthreatthebearmovedoffdestroyingafenceasitwent.Myarmwasinjuredbuttheoutcomeforuscouldhardlyhavebeenbetter.I'mproudthatmyfamilyremindedclear﹣headedwhenpaniccouldhaveledtoaverydifferentoutcome. 1Thebrownbearapproachedthefamilyinorderto. A.catchshorebirds B.startanattack C.protectthechildren D.setupabarrierforitself 2Thebearfinallywentawayafterit. A.feltsafe B.gotinjured C.foundsomefood D.tookawaythecamera 3Whichofthefollowingphrasescanreplacegoinginforinthesecondparagraph? A.goingtochaseafter B.goingtolike C.goingtotakepartin D.goingtosupport 4Thewriterandhisfamilysurvivedmainlyduetotheir. A.pride B.patience C.calmness D.cautiousness

中国酿酒最初起源于夏初或夏朝以前的时期距今已经有四千余年的历史了．中国的黄酒属于酿造酒在世界三大酿造酒黄酒葡萄酒和啤酒中占有重要的一席．请回答下列关于酿酒的相关问题． 1酿酒主要的微生物是酵母菌从代谢类型分析属于型．它与醋酸菌在细胞结构上最主要的区别是． 2黄酒是利用谷物作原料用麦曲做糖化发酵剂制成的酿造酒．已知麦曲内含有丰富的酶请写出糖化的原理． 3黄酒属于酿造酒酒精度数一般为15度左右酒精度数无法继续提高的原因可能是． 4酿酒所忌讳的就是酒变酸酒的酸败是由于． 5为获得高纯度的黄酒需要对所用酵母菌进行分离和纯化．微生物接种的方法很多最常用的是平板划线法和．虽然这些技术的操作方法各不相同但是核心都是要防止．保藏的方法主要有临时保藏在固体斜面培养基上长期保存的菌种可采用的方法．

属于氮肥的是

1分﹣Whatdoyouthinkoftheband'sperformance? ﹣Itcouldbe.Ithinkthey'refeelingverynervous. A.good B.better C.bad D.worse

图1是镁元素在元素周期表中的相关信息图2是该元素形成的一种粒子的结构示意图． 1元素周期表中镁元素的原子序数为． 2图2所示粒子为填离子或原子． 3镁广泛应用于飞机制造业工业常用电解熔融状态的氯化镁来制得金属镁写出该化学方程式．

将金属镁和另一种金属X的混合物共ag加入CuNO32FeNO32的混合溶液中充分反应后过滤得到滤液和滤渣．相关分析错误的是

下列人体体液中一定属于碱性的是

核电站是利用核选填聚变或裂变来发电核能是选填可再生或不可再生能源．

10分假定英语课上英语老师要求同桌之间互相修改作文请你修改你同桌的以下作文.文中共有10处语言错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 删除把多余的词用斜线\划掉. 增加在缺词处加一个漏字符号∧并在该词下面写出该加的词. 修改在错的词下划一横线在该词下面写出修改后的词. 注意1.每处错误及修改均仅限一词. 2.只允许修改10处多者从11处起不计分. Patienceisgreatimportanceinourdailylife.OnceIwaitedforabustocomeatastop.30minutespastbutnobuscame.BothupsetandannoyedIdecidetowalkonfoot.ButnosoonerhadIleftwhenabusarrived.IthoughtifIhadwaitedforonemoreminutesIwouldhavecaughtit.IfIchosetotakethenextbusIwouldhavetowaitforother30minutes.OnlythendoIrealizemyproblem.Beingimpatientwillpossiblewastealltheeffortthatwehaveputitin.NowwheneverIamclosetolosemypatienceI'llthinkofthisexperience.

中国科学家积极参与国际生命科学前沿研究为全球生命科学的发展做出了贡献．下列叙述中没有中国科学家参与研究的是

15分Bodyimage﹣thewaypeoplefeelabouttheirlooks﹣isabigproblemformanyyoungpeopletoday.Accordingtoa1morethanhalftheteenagegirlsintheUSAthink2shouldbeonadiet节食andalmostoneinfiveteenageboysare3abouttheirbodiesandtheirweight. Butwhat'sthecause?Inthestudymanyblame责备themedia媒体.TurnontheTVandyou'll4seebeautifulmodelshandsomeactorsandfitsportsstars.5amagazineoranewspaperlookthroughtheInternetandit'susually6. Manyyoungpeoplefeelpressureto7theseperfectpeople.Butformostthisisjustnotpossible.IntheUSAtheaverage平均的womanis163cmtallandweighs64kilos8theaveragemodelis180cmtallandweighs53kilos. Whenpeopledon'tlookthewaymany9peoplelooktheymaybecomelessconfident.Somestopeating10inordertoloseweight.Studentscanlosesomuchconfidencethattheystartto11takingpartinclassroomactivitiesatschool. Bodyimageproblemsdon't12aswegetoldereither.IntheUKforexamplewomenover50spendmoremoneyoncosmetics化妆品thananyother13group.Oldermenspendalotofmoneytryingto14hairloss损失. Isthereasolutiontotheproblem?A2016studyintheUKsuggestedthatbodyimagelessonsshouldbeprovidedin15.Othersbelieveit'saproblemthatallofsocietyneedstodealwith.AsMeaghanRamseysaysWeneedtojudge批判peoplebywhattheydonotwhattheylooklike. 1A.newspaper B.magazine C.study D.book 2A.we B.they C.you D.she 3A.confident B.sure C.worried D.happy 4A.probably B.hardly C.never D.finally 5A.Get B.Open C.Take D.Find 6A.thesame B.different C.special D.interesting 7A.lookafter B.lookfor C.lookat D.looklike 8A.because B.although C.but D.of 9A.kind B.strong C.young D.famous 10A.early B.properly C.slowly D.carefully 11A.enjoy B.stop C.finish D.forget 12A.come B.continue C.disappear D.happen 13A.age B.job C.hobby D.man 14A.make B.avoid C.refuse D.protect 15A.supermarkets B.streets C.parks D.schools

在下列四种飞行器中飞行时利用流体压强与流速关系获得升力的是

运用下列单一操作对自然界中的水净化程度最高的是

2C+SiO2Si+2CO↑属于

亚硝酸钠NaNO2是一种工业用盐它有毒有咸味外形与食盐相似．人若误食会引起中毒危害人体健康甚至致人死亡．在亚硝酸钠中氮元素化合价是

2018年1月6日一艘油船与另一艘货船在长江口以东海域相撞起火引起该油船装有的13.6万吨凝析油发生爆炸并引发大火然后慢慢沉入海底．下列说法正确的是

1分Thefilmseemsinterestingweallwanttoseeit. A.and B.but C.unless D.if

图表示有关动物生命活动过程的模型图下列相关叙述错误的是

我国水果生产发展迅速每年上市的新鲜水果品种多数量大．随着水果加工技术的发展可满足人们不同层次的需求．水果的加工包括制作果汁果酒果醋果干等．请回答下列问题 1日常生活中可直接用法生产苹果汁加入能够提高水果的出汁率并使果汁变得澄清． 2新鲜的苹果汁可发酵制成苹果酒酵母菌常用于苹果酒的制作其异化作用类型为其产生CO2的场所是． 3若想对酵母菌进行计数则应用法在培养基上进行接种．平板划线法一般不用于活菌计数的原因是． 4若利用固定化细胞技术发酵葡萄糖溶液与固定化醇技术相比技术对酶活性影响更小原因是．

能发生反应且化学方程式书写正确的是

放入水中能够形成溶液的是

科研人员利用腐烂的水果筛选产果胶酶的细菌并对果胶酶进行分离纯化请回答 1通过以为唯一碳源的选择培养基筛选出可降解果胶的细菌．观察筛选菌株的菌落的回答两点等特征进行物种鉴定由于野生细菌自身产酶能力有限可通过回答两点等育种方式得到酶活力较高的优良菌株． 2将含有高产果胶酶的分解菌培养液进行适度离心后即为产果胶酶菌株发酵产生的粗酶液．经初步纯化后可通过凝胶色谱法进一步去除杂蛋白在层析柱中相对分子质量较大的蛋白质移动速度填较快或较慢． 3将纯化后的果胶酶固定化用于果汁工业生产与游离酶相比具有的优点是回答两点．

小明同学不小心碰翻了滚烫的热水他立即缩回手想起应该用冷水冲洗并付诸行动．下列相关叙述错误的是

如图所示的电路中电源电压保持不变闭合开关S将滑动变阻器的滑片P向左移动下列说法中正确的是

如图所示电源两端电压恒定．闭合开关灯泡L1比灯泡L2亮则

6分Meetingpeoplefromanotherculturecanbedifficult.Fromthebeginningpeoplemaysendthewrongsignal.Ortheymaypaynoattentiontosignalsfromanotherpersonwhoistryingtodeveloparelationship. Differentculturesemphasizetheimportanceofrelationshipbuildingtoagreaterorlesserdegree.Forexamplebusinessinsomecountriesisnotpossibleuntilthereisarelationshipoftrust.Evenwithpeopleatworkitisnecessarytospendalotoftimeinsmalltalkusuallyoveraglassofteabeforetheydoanyjob.InmanyEuropeancountries﹣liketheUKorFrance﹣peoplefinditeasiertobuildupalastingworkingrelationshipatrestaurantsorcafé'sratherthanattheoffice. Talkandsilencemayalsobedifferentinsomecultures.IoncemadeaspeechinThailand.Ihadexpectedmyspeechtobeasuccessandstartalivelydiscussion;insteadtherewasanuncomfortablesilence.Thepeoplepresentjuststaredatmeandsmiled. AftergettingtoknowtheirwaysbetterIrealizedthattheythoughtIwastalkingtoomuch.Inmyowncultureweexpressmeaningmainlythroughwordsbutpeopletheresometimesfeeltoomanywordsareunnecessary. EvenwithinNorthernEuropeculturaldifferencescancauseseriousproblems. CertainlyEnglishandGermanculturessharesimilarvalues;howeverGermansprefertogetdowntobusinessmorequickly.Wethinkthattheyarerude.Infactthisisjustbecauseoneculturestartsdiscussionsandmakesdecisionsmorequickly. Peoplefromdifferentpartsoftheworldhavedifferentvaluesandsometimesthesevaluesarequiteagainsteachother.Howeverifwecanunderstandthembetteramulticulturalenvironmentwillofferawonderfulchanceforustolearnfromeachother. 1Insomecountrieseatingtogetheratrestaurantsmaymakeiteasierforpeopleto. A.gettoknoweachother B.sharethesameculture C.developcloserrelations D.keepeachothercompany 2TheauthormentionshisexperienceinThailandtoshowthat. A.theEnglishprefertomakelongspeeches B.eventalkandsilencecanbeculturallydifferent C.peoplefromThailandarequietandshybynature D.toomanywordsareofnouse 3Accordingtothetexthowcanpeoplefromdifferentculturesunderstandeachotherbetter? A.Byrecognizingdifferentvalues. B.Byacceptingdifferenthabits. C.Bysharingdifferentwaysoflife. D.Byspeakingeachother'slanguages.

Oyster WhatisanOystercard? OysteristheeasiestwaytopayforjourneysonthebusTube地铁tramDocklandsLightRailwayDLRLondonOvergroundandNationalRailjourneysinLondonYoucanstoreyourtravelcardsBus&TramPassseasonticketsandcredittopayforjourneysasyougo. WheretogetanOystercard? ThereareanumberofwaysforyoutogetanOystercard •Atover3900OysterTicketstops •AtTubeandLondonOvergroundstationticketoffices •AtsomeNationalRailstations •AtLondonTravelinformationCentres •Onlineattfl.gov.UK/Oyster HowtouseanOystercard? TopaythecorrectfareontheTubeDLRLondonOvergroundandNationalRailservicesyoumustalwaystouchinontheyellowOystercardreaderatthestartofyourjourneyandtouchoutattheend.Ifyoudon'tamaximumcashOysterfarewillbecharged.Whenusingthebusortramyoumustonlytouchinatthestartbutnotattheendofyourjourney. WhathappensifIdon'tvisitLondonveryoften? Don'tworry.Anypayasyougocreditonyourcardwillnotexpire过期soyoucankeepitforyournextvisitorlendittoafriend. Fares TravelingbyTubefromCentralLondonZoneltoHeathrowZone6 AdultOystersinglefare £4.20MondaytoFriday0630﹣0930and1600﹣1900 £2.70atallothertimesincludingpublicholidays Adultsinglecashfare£5.00 Forfurtherinformationvisittfl.gov.uk/fares. 1YoucangetanOystercardatthefollowingplacesEXCEPT A.onthewebsite B.atanOysterTicketstop Catapostoffice D.ataTubestation 2WhichofthefollowingisTRUEaboutOystercards? A.Theyarelimitedinusetotheownersthemselves. B.OnNationalRailservicesyoumusttouchthemonthereadertwice. C.Theyarenotsuitableforthosewhodon'tvisitLondonoften. D.OystercardTubefarescostmoreonpublicholidaysthanonweekdays. 3HapersonwithanOystercardtakesthe7o'clockTubefromCentralLondontoHeathrowforaweeknopublicholidayinbetweenheshouldpay. A.£18.90 B.£29.40 C.£21.90 D.£26.40 4Thepassageisprobablytakenfroma. A.magzine B.travelguide C.textbook D.novel

我国计划在2025年实现首次载人登月．已知月球上无大气无磁场物体在月球上所受重力只相当于地球上的假设月球表面粗糙程度与地面相同．在月球上你认为下列情况可能的是

如图所示人用绳子拉着木块木块在绳子拉力作用下在水平面上做匀速直线运动则下列说法中正确的是

除去下列物质中所含少量杂质的方法正确的

__提出的一带一路是跨越时空的宏伟构想赋予古丝绸之路崭新的时代内涵把我国的高铁技术火药使用蚕丝制造等送到国外其中属于现代先进科技的是黑火药爆炸时的化学反应方程式为S+2KNO3+3C═X+K2S+3CO2X的化学式为．

冬季为避免__线结冰而导致输电线路损坏电业局频频出招利用无人机装配喷火器喷火通过方式改变内能使冰熔化利用电流的热效应通过选填增大或减小电流使电线温度升高．

2016年8月16日我国用长征二号丁运载火箭成功将世界首颗量子科学实验卫星简称量子卫星墨子号发射升空如图所示火箭在加速上升的过程中

化学是一门以实验为基础的科学．请根据下列仪器和实验装置回答问题 1仪器名称①． 2利用图1所给仪器组装一套二氧化碳或氧气的制取装置并写出该反应的化学方程式基本反应类型是． 3若用图2装置收集二氧化碳气体气体应从导管填m或n端通入． 用燃着的木条放在另一端发现小木条始终不熄灭说明该瓶气体没有集满出现上述现象的原因可能是写一个．

在测量小灯泡的电功率的实验中小灯泡的额定电压为2.5V正常发光时的电阻约为8Ω． 1在图甲中有一根导线未连接请用笔画线代替导线将电路连接完整 2闭合开关后小灯泡不亮电流表没有示数电压表有较大的示数经检查导线连接完好则电路故障可能是小灯泡发生了选填短路或断路 3移动滑片P到某一位置时电压表示数如图乙所示为V此时要测量小灯泡的额定功率应将滑片P向选填左或右端移动 4移动滑片P记下多组对应的电压表和电流表的示数并绘制成图丙所示的I﹣U图象由图象可计算出小灯泡的额定功率是W． 5完成上述测量后不用电压表用如图丁所示的电路也可测量已知额定电流的小灯泡的额定功率已知小灯泡的额定电流为I额定值电阻的阻值为R0实验步骤如下请补充完整 ① ②闭合开关SS1断开开关S2记录下此时电流表的示数为I ③小灯泡的额定功率的表达式为P额＝W．

人体中一些体液的pH都处在一定的范围内其中酸性最强的是

前不久你校学生会向高三学生发出倡仪十八岁的生日时请为你们的父母做一件有意义的事.同学们积极响应纷纷表达自己的做法.请根据以下信息以SomethingSpecialForParents用英语写一篇短文.内容包括 1.描述以上有关学生会倡议的信息和同学们的反应. 2.可以适当增加内容 3.不能使用真实姓名和学校名称. SomethingSpecialForParents NotlongagoStudentUnioninourschooladvocatedthat Bestwishes! Yours LiHua

如图所示磁悬浮地球仪应用了选填同或异名磁极相互排斥的规律．

Doyoubelievefatecanbringtogetherpeoplewhoarefarapart?Hereisatruestory. Asheposedforaholidayphotoonthebeachsix﹣year﹣oldNickWheelerpaidnoattentiontothelittlegirl1makesandcastlesafewyardsaway.Itwasonlywhenheshowedhisfiancee未婚妻AimeeMaidenthephoto20yearslaterthatshepointedat2five﹣year﹣oldinaswimsuitandcried3surpriseThat'sme! 4thepicturewastakenin1994thepairlivedhundredsofmilesapartyetfatedeterminedthatthey5meetandfallinloveatsixth﹣formcollege11yearslater.AftertheircollegeyearsMr.Wheelerjoinedthearmy6MissMaidentrainedasateacher. Theymovedintogetherthreeyearsagoandgotengagedlastyear.Theyhostedapartywheretheyshowedoffthephoto7theirfriendsandfamily.ThecouplemarriedonSaturdayatGulvalChurchinMousehole20years8thephotowastakenandjusta9minutewalkfromthesamespot. TheyareheadingtoFloridafor10honeymoonandplantoframethetreasured.

蝴蝶兰是一种阴生观赏花卉往往表现出白天气孔关闭傍晚气孔开始开放的现象．如图为夏天不同光照条件下蝴蝶兰净光合速率变化曲线下列说法错误的是

熟石灰在生产生活中有着重要的应用．它的溶解度曲线如图所示则以下说法正确的是

OneSecondMakesYouHappier Onesecond.That'sallittakestomakeyourlifehappier.Don'tbelieveit?ThenCheckoutthislistofseveralthingsyoucandoinasinglesecondthatwillbringmorehappinessintoyourlifeeveryday. 1.Giveagreatbigsmile Lookingforaneasywaytomakeyourlifehappier?Smilemore.1Anditcanbecontagious.Sogiveasmiletoatotalstrangeronthestreet.Orifyou'resadangryorannoyedaboutsomethingchoosetosmileandlaughitoffinstead. 2.2 Speakingoflaughingthere'sreasonwhyit'scallednature'sbestmedicine.Laughingcaninstantlymakeyouhappier.Don'tbeashamedtoletoutabelly﹣deeplaugheveryday.It'sgoodforyourbodyminedandsoul. 3.Takeadeepbreath. 3Anditonlytakesasecond.Takesometimeouteachdaytofocusonnothingexceptyourbreath.You'llfindyoulifebecomeshappierhealthierandlessstressful. 4.Doaquickstretch Aneasywaytomakeyourlifebetteristotakecareofyourbody.4Herearesomegoodstretchesyoucandoatwork. 5.Givethanks Happypeoplehavethisincommontheyaregratefulforallthegoodthingsintheirlives.Thismeansthattomakeyourlifehappiertakeafewminuteseachdayadcountyourblessings.SaysThankyoumoreoften.5 A.Laughoutloud B.Takebestmedicine C.Showyourappreciationwhengoodthingscomeyourway D.Takeafewsecondstostretchoutyourtightspotsandsoremuscleseachday E.Smilingcanhelpyoufeelbetterinstantly F.Adeepbreathcanmakeyouhappyeveryday G.Deepbreathingisoneofthebestwaystoreducestressandbringbalancebackintoyourlife.

光呼吸是进行光合作用的细胞在光照和O2/CO2值异常情况下发生的一个生理过程该过程借助叶绿体线粒体等多种细胞器共同完成如图所示是光合作用伴随的一个损耗能量的副反应．Rubisco是光呼吸过程中所需要的酶也是光合作用中参与CO2固定的关键酶．请回答相关问题 1Rubisco酶在合成分布在． 2在较高CO2浓度环境中Rubisco酶所催化反应的产物是该产物进一步反应还需要． 3叶肉细胞既能进行光呼吸也能进行有氧呼吸请据图概括出光呼吸和有氧呼吸在物质代谢方面的相同点答出两点即可．

沙蚕是养殖业的重要饪料生物具有较强的生长和再生能力将幼年沙蚕后部体节切去沙蚕能重新长出体节．请根据如表的实验及实验结果回答 1沙蚕体节的生长再生与时期脑神经节有关． 2幼年沙蚕的脑神经节能沙蚕的性成熟． 3实验表明幼年脑神经节分泌某种物质控制沙蚕的再生与性成熟这属于调节方式随着沙蚕的生长该物质分泌量逐渐．

8分IrelandJapanChinascientistssharethe2015NobelPrizeformedicine.WilliamCampbellSatoshiOmuraandTuYouyoujointlywontheprizefortheirworkagainstdiseasestheaward﹣givingbodysaidonMonday. TuYouyouascientistattheChinaAcademyofChineseMedicalScienceshasnopostgraduatedegree.Shehasneverstudiedordoneresearchabroad.SheisneitheramemberoftheChineseAcademyofSciencesnortheChineseAcademyofEngineering.Howeverthe81﹣year﹣oldpharmacologisthasbecomethefirstscientistontheChinesemainlandtowinaLaskerAwardthemedicalprizeoftheAlbertandMaryLaskerFoundation. TheLaskerAwardshaveexistedsince1945.Tuwaspresentedthe2011LaskerClinicalMedicalResearchAwardonSeptember23.Shediscoveredadrugcalledartemisinin.Thedrugisnowwidelyusedagainstmalaria. Tuandhercolleaguesjoinedagovernmentprojecttofindanewmalariadruginthelate1960sduringtheculturalrevolution1966﹣76.Theymade380herbalextractsfrom200potentialrecipes.TherecipescamefromtraditionalChinesemedicalbooks.Theteamthentestedthemonmalaria﹣infectedmice.FinallyTubecameinterestedinanextractoftheplantqinghaoorsweetwormwood. AccordingtoanancientChinesemedicinebookqinghaowasonceusedtotreatmalaria.Howevertheextracttheymadeinthelabdidn'tworkwell.MaybethoughtTutheeffectiveingredientinqinghaowasdestroyedbyhightemperatures.ThereforeTutriedtomaketheextractwithanetherwhichhasamuchlowerboilingpointthanwater. In1971aftermorethan190failuresTufinallygotanextractthatwas100percenteffectiveagainstthemalariaparasites.Theextractwascalledqinghaosulaterrenamedartemisinin. AccordingtoastatementontheLaskerFoundationwebsiteduringthepastfourdecadesTu'sdrughassavedmillionsoflives.Itisespeciallyimportantforchildreninthepoorestandleastdevelopedpartsoftheworld.HowevernotmanypeopleknewofthescientistuntilshewontheLaskerAwardthismonth. LaskerAwardsareknownasAmerica'sNobelsforthereasonthatinthelasttwodecades28LaskerPrizewinnershavegoneontoreceivetheNobelPrizeand80since1945accordingtoXinhuaNewsAgency. ThediscoveryofartemisininisagifttomankindfromtraditionalChinesemedicineTusaidwhenshereceivedthea﹣ward.Continuousexplorationanddevelopmentoftraditionalmedicinewillwithoutdoubtbringmoremedicinestotheworld. 1Whatcanweinferfromthesecondparagraph? A.Itisunnecessarytostudyabroadasascientificresearcher. B.ChinesemedicineusednottoberecognizedinWesterncountries. C.Tuachievedgreatthingsalthoughshedidn'thaveanimpressivebackground. D.TuisthefirstfemalescientisttowinaLaskerAward. 2IntheprocessofdiscoveringartemisininTu. A.beganwithaprivateproject B.succeededduringthefirstexperiments C.facedmanydifferentopinions D.madeextractsinacreativeway 3Whyisartemisininespeciallyimportantforchildrenfrompoorcountries? A.Itisaverycheapmedicineandeasyforthemtogetholdof. B.TheybelieveintheeffectofChinesemedicine. C.Therearenoothercuresformalaria. D.Ithasthefewestsideeffectsforchildren. 4AccordingtothearticletheLaskerAwards. A.aremoreinfluentialthanNobelPrizesinthemedicalfield B.areawardedtothosewhohavemadegreatmedicalachievements C.areawardedtomoreAmericansthanpeoplefromanyothercountry D.areusuallyawardedtoscientistswhoarenotfamousintheirfield

小柯利用实验室的器材开展了下列实验．根据要求回答问题 1如图甲将液体压强计的金属盒放入水里并不断改变金属盒在水中的深度观察U形玻璃管两边液面的高度差．这样做是想研究． 2如图乙在直导线下方放置一枚小磁针当导线中有电流通过时磁针发生偏转表明通电导线周围存在磁场如果导线下方不放小磁针当导线中有电流通过时则该通电导线周围选填存在或不存在磁场． 3如图丙在测量滑动摩擦力的实验中水平桌面上的木块受到2N水平向右的拉力F作匀速直线运动．当拉力F大小变为4N时物块受到的摩擦力为N．

通电直导线周围的磁场是以导线为圆心的同心圆如图甲所示判断直导线周围磁场方向的方法是用右手握住直导线让大拇指指向与直导线中电流的方向一致则弯曲的四指所指方向即为磁场方向．请你用此方法判断图乙中直导线通电时小磁针N极指向选填垂直纸面向内或垂直纸面向外．

在实验室某同学将氢氧化钠溶液逐滴滴入硫酸和硫酸铜的混合溶液中直至过量．加入氢氧化钠溶液的质量横轴与混合溶液中溶质质量纵轴的关系如图所示． 1实验中观察到的现象一开始过一会发现有蓝色沉淀生成． 2实验中发生的中和反应的化学方程式是． 3图中B→C线段对应溶质质量减小的本质原因是．填字母 A．该段没有发生化学反应 B．加入NaOH80份质量小于生成沉淀CuOH298份质量 C．成沉淀CuOH2是蓝色的 D．该段反应有水生成 4向反应后的溶液中加入适量BaCl2溶液怡好完全反应后溶液中的溶质有．用化学式填空

分类是学习化学的方法之一下列各组物质是按单质氧化物混合物进行分类的是

30分Igotaboardandsatdowninmyseat.Itwasgoingtobealongflight.Aroundmeweresome1Whereareyouheaded?Iasked. LakesAirBase.We'llbethereforspecialtrainingandthentothefront. Afteraboutanhouranannouncementwasmadethatboxluncheswere2forfivedollars.ThejourneywouldbeseveralhoursandIdecidedtobuyone. AsI3formywalletIheardasoldieraskhisfellowsifhewouldbuylunch.Nothatseemsalotofmoneyforjustaboxlunch.Ilookedaroundattheothersoldiers.4werebuyinglunch.Iwalkedtothebackoftheplaneand5theflightattendantafifty﹣dollarbill. Takealunchtoallthosesoldiers.Isaid.Sheseizedmyarmstightly.Hereyeswetwithtearsshe6meMysonisasoldierinthefrontit'salmostlikeyouaredoingitforhim. Pickinguptenboxessheheadedtothesoldiers. AftereatingonmywaytotherestroomIwas7byaman.Isaw8youdidandIwanttobepartofit.Withthishehandedmetwenty﹣fivedollars. SoonafterIreturnedtomyseatIsawtheFlightCaptaincominglookingattheseatnumbers9hewalked.Whenhegottomyrowhestoppedsmiledheldouthis10andsaidIwantto11yourhand.Istoodandtookhishand.WithaloudvoicehesaidIwasasoldier.12someoneboughtmealunch.Itwassuchanactof13thatIneverforgot.Iwasalittlebit14whenapplauserangoutfromallofthepassengers.Thesesoldiersweregivingtheirallforourcountry.Icouldonlygivethemacoupleofmeals. LaterwhenIwalkedtothefrontoftheplanetostretchmylegsaman15anothertwenty﹣fivedollarsinmyhand. Whenwe16Igatheredmybelongingsandstartedtoleave.Amanstoppedmeputsomethinginmypocketandwalkedaway17aword.Anothertwenty﹣fivedollars!Seeingthesoldiers18attheterminalIwalkedovertothemandhandedthemseventy﹣fivedollars.AsIwalked19tomycarIprayedfortheirsafe20. 1A.strangers B.soldiers C.attendants D.passengers 2A.available B.reasonable C.convenient D.special 3A.prepared B.sent C.reached D.paid 4A.None B.Some C.Many D.All 5A.lent B.showed C.handed D.charged 6A.advised B.greeted C.inspired D.thanked 7A.praised B.stopped C.attracted D.discovered 8A.how B.which C.what D.that 9A.as B.though C.till D.unless 10A.tongue B.arm C.head D.hand 11A.feel B.seize C.Shake D.check 12A.Once B.Later C.Recently D.Frequently 13A.performance B.kindness C.bravery D.wisdom 14A.embarrassed B.relieved C.overjoyed D.satisfied 15A.threw B.found C.took D.left 16A.separated B.landed C.paused D.chatted 17A.in B.for C.through D.without 18A.training B.shouting C.gathering D.marching 19A.casually B.Anxiously C.disappointedly D.lightheartedly 20A.arrival B.return C.flight D.escape

中国是世界上少数能够制造运输液化天然气专用船舶﹣﹣LNG船的国家．液化天然气的主要成份为甲烷甲烷的熔点﹣182.5℃沸点﹣161.5℃．LNG船在运输液化天然气过程中储罐内最适宜的温度是

在某一农田生态系统中大面积单一种植某种农作物甲可导致害虫A的爆发．改成条带状合理地间作当地另一农作物乙后乙生长良好害虫A的爆发也受到了抑制．请回答下列问题 1植保员对害虫A进行监测和预报时首先要对进行调查研究通常在害虫防治过程中若使用性引诱剂诱杀雄虫改变性别比例以降低若使用黑光灯诱捕害虫以降低害虫的密度对丁害虫而言黑光灯对其传递了信息． 2从群落结构看间作后主要改变了群落的乙的出现使害虫A的环境容纳量填升高或不变或下降．

如图所示A是悬挂在弹簧测力计下的条形磁铁B是螺线管．闭合开关S待弹簧测力计示数稳定后将变阻器R的滑片缓慢向右滑动在此过程中下列说法错误的是

8分Contrarytotheimpressionthatgrandmothersaredelightedtohelptheirgrowndaughtersandcarefortheirgrandchildrenastudyofmultigenerationalfamiliesshowsthatmanyolderwomenhatethefrequentdemandsthattheyoungergenerationsmakeontheirtimeandenergy. YoungwomenwithchildrenareunderalotofpressurethesedaysandtheyexpecttheirmotherstohelpthempickupthepiecesnotedDr.BertramJ.CohlerabehavioralscientistattheUniversityofChicago.ThisisoftenthestrongestsourceofcomplaintonthepartofGrandmotherwhohasfinishedwithchildcaringandnowhasherownlifetolive.Grandmothersliketoseetheirchildrenandgrandchildrenbutontheirowntime. Dr.CohlerisdirectorofastudysponsoredbytheNationalInstituteofAgingof150workingclassfamiliesthatliveinaMidwesternsuburb.HeandDr.HenryU.GruebaumofHarvardMedicalSchoolhavealreadycompletedtheirstudyoffoursuchfamiliesinNewEngland. Dr.Cohlertellsofamiddle﹣agedBostonwomanwhoworksasacookallweekandforherparish教区onSundays.EverySaturdayheronedayoffherdaughterandfamilyvisitexpectingmothertomakelunchshopandvisit.That'snothowshewantstogrowoldsaidDr.CohlerwhowastoldbytheolderwomanMydaughterwouldneverspeaktomeifsheknewhowangryandunhappyIget. InallthefourNewEnglandfamiliesstudiedtheolderwomendislikedthenumerousphonecallsandvisitsfromtheirgrowndaughterswhooftenturnedtothemothersforadvicephysicalresourcesloveandcompanionshipaswellasbaby﹣sittingservices.Americansocietykeepsincreasingtheburdensforolderpeopleparticularlythoseintheir50sand60sDr.Cohlersaidinaninterviewhere.They'restillworkingandthey'retakingcareoftheirgrownchildrenandmaybealsotheiragedparents.Sometimeslifegetstobetoomuch. 1Whichofthefollowingisclosestinmeaningtotheexpressionpickupthepiecesinthesecondparagraph? A.Saveabadsituation. B.Putchildren'stoysintheirproperplaces. C.Gatheruppiecesofclothing. D.Keeptheroomingoodorder. 2Themiddle﹣agedBostonwoman. A.expectshermothertocooklunchforher B.enjoystheroomingoodorder C.visitsanolderwomaneverySaturday D.workssixdaysaweek 3Thepassageismainlyabout. A.youngwomen'sinabilitytolookaftertheirchildren B.Grandmothers'attitudestowardhelpingtheirgrowndaughters C.averageAmericanwomen'sfamilylife D.grandmothershouldgivemorehelptotheirdaughters 4FromDr.Cohler'sstudywemayreachtheconclusionthat. A.daughtersshouldbeindependentoftheiroldgrandmothers B.grandmothershouldgivemorehelptotheirdaughters C.mothersanddaughtersshouldsupporteachother D.daughtersshouldbemoreconsideratetowardtheirmothers

小黄同学想知道某金属块的重力和密度他手中只有一只量程较小的弹簧测力计当他用此弹簧测力计直接测量该金属块的重力时发现已超过量程于是他用一根轻质杆设计了如图所示的装置已知OAOB＝14．用弹簧测力计在B点施加一个竖直向上的力当杠杆水平静止时弹簧测力计的示数为1.8N向容器中加水金属块浸没于水中当杠杆仍处于水平静止时发现弹簧测力计的示数变为1.2N则金属块受到的重力是N密度是kg/m3．

高速公路已广泛应用ETC收费系统可对过往车辆无需停车即能实现收费的电子系统如图是某高速公路入口处的EC通道示意图．现有一辆总质量M＝1500kg的汽车在进入ETC收费岛区域前s1＝50m处开始减速经t1＝4s后运动至ETC收费岛图中阴影区域边界然后再经t2＝6s匀速通过ETC收费岛其长s2＝36m．不计车长． 1求汽车从减速开始到离开ETC收费岛全过程的平均速度大小 2若汽车在ETC收费岛匀速行驶所受阻力为车重力的0.2倍求汽车通过ETC收费岛牵引力所做的功．

如图所示小华站在地铁玻璃安全门外候车．地铁到站后玻璃门向两侧打开小华在左右两侧玻璃门中成像的情况分析正确的是

下列各组转化中一定条件下均能一步实现的组合是

8分Areyoufeelingblue?AnAmericanstudysuggeststhatbeingsurroundedbyhappyfriendsandneighborscouldhavemoreofaneffectonyourhappinessthanmoney.ThatisthefindingofresearchersfromHarvardUniversityandtheUniversityofCaliforniaatSanDiego. NicholasChristakisandJamesFowlerstudiedtheemotionalhealthofmorethanfourthousandsevenhundredpeople.TheyusedinformationfromtheFraminghamHeartStudy.ThatstudybegansixtyyearsagointheAmericancommunityofFraminghamMassachusetts.Itwasstartedtolearnmoreabouttherisksofheartattackandstroke.ForthenewstudytheresearchersexaminedtheemotionsofthemenandwomenintheFraminghamHeartStudy.Theinformationwasgatheredfrom1983to2003. Theresearchersfoundthatfriendsofhappypeoplehadagreaterchanceofbeinghappythemselves.Thatmeansthathappinessspreadsorhasacontagiouseffectamongpeople.Andthesmallerthephysicaldistancebetweenfriendsthelargertheeffecttheyhadoneachother'shappiness.Forexampleapersonwastwentypercentmorelikelytofeelhappyifhis/herfriendlivingwithinoneandahalfkilometerswasalsohappy.Havingahappyneighborwholivednextdoorincreasedanindividual'schanceofbeinghappybythirty﹣fourpercent.Theeffectsoffriends'happinesslastedforuptoayear. Anotherfindingwasthatpeoplewhoworkedtogetherorweremarrieddidnothaveasmuchoftheeffectonhappinesslevelsasfriendsdid.Theresearcherssaidthiswasoftentrueamongfriendsofthesamesex. AreportonthefindingswaspublishedthismonthintheBritishMedicalJournal.America'sNationalInstituteonAginghelpedtopayforthestudy.Someresearcherswhowerenotinvolvedwiththestudyquestioneditsfindings.Theysaidtheresultscouldbedisputed争议unlessaseparatestudyshowedsimilarfindings. 1Whatdoesthistextmainlytellus? A.Howtoliveahappylife? B.One'shappinessinfluencesothers. C.Howtokeepemotionshealthy? D.Ascientificexperiment. 2Fromthistextweknowthat. A.NicholasandJamesbasedtheirfindingsonthestudyofamedicalresearch B.NicholasandJameshavebeendoingtheirresearchformorethantwentyyears C.apersonwithahappyfriendhasmorechanceoffeelingblue D.ahappypersonismorelikelytosufferfromheartattack 3AccordingtothistextwhichofthefollowingfourpersonsmayhavealargereffectonMrs.Smith'shappiness? A.Mr.GreenSmith'sformerclassmate. B.Mr.ThomasSmith'scolleague. C.Afriendinanothercity. D.Ahappysingleladynextdoor. 4Whatdoesthelastparagraphimply? A.Someresearchersstilldonotagreetothefindingsbythetwoexperts. B.Moreresearchesarestillneededtobedonebeforeabetterconclusionismade. C.America'sNationalInstituteonAginggavemuchsupporttothetwoexperts. D.Moreandmorescientistsbecomeinterestedintheresearchbythetwoexperts.

8分Itisnotonlypraiseorpunishmentthatdeterminesachild'slevelofconfidence.Therearesomeotherimportantwaysweshapeourkids﹣particularlybygivinginstructionsandcommandsinanegativeorpositivechoiceofwords.ForexamplewecansaytoachildDon'trunintotraffic!orStayonthefootpathclosetome.Inusingthelatteryouwillbehelpingyourkidstothinkandactpositivelyandtofeelconfidentinawiderangeofsituationsbecausetheyknowwhattodoandaren'tscaringthemselvesaboutwhatnottodo. Actuallyitisallinthewaythehumanmindworks.Whatwethinkweautomaticallyrehearse预演.Forexampleifsomeoneofferedyouamilliondollarsnottothinkofabluemonkeyfortwominutesyouwouldn'tbeabletodoit.WhenachildistoldDon'tfalloffthetreehewillthinkoftwothingsdon'tandfalloffthetree.Thatishewillautomaticallycreatethepictureoffallingoffthetreeinhismind.Achildwhoisvividlyimaginingfallingoffthetreeismuchmorelikelytofalloff.SoitisfarbettertouseHoldontothetreecarefully. Clearpositiveinstructionshelpkidstounderstandtherightwaytodothings.Kidsdonotalwaysknowhowtobesafeorhowtoreacttothewarningofthedangerinnegativewords.Soparentsshouldmaketheircommandspositive.SamholdonfirmtothesideoftheboatismuchmoreusefulthanDon'tyoudaretofalloutoftheboat?orworsestillHowdoyouthinkI'llfeelifyoudrown?Thechangesaresmallbutdifferenceisobvious. Childrenlearnhowtoguideandorganizethemselvesfromthewayweguidethemwithourwordssoitpaystobepositive. 1Positivechoiceofwordshelpskidsto. A.builduptheirconfidence B.learnindifferentsituations C.improvetheirimagination D.dothingscarefully 2WhatcanweinferfromParagraph2? A.Achildwillactonwhatisinstructed. B.Onecan'thelpimaginingwhatisheard. C.Achildwillfalloffthetreewhentoldnotto. D.Onewon'tthinkofabluemonkeywhengivenmoney. 3Whichofthefollowingcommandshelpskidstobesafe? A.HowdoyouthinkI'llfeelifyougethurt? B.Don'tplaybythelake. C.Fastenyourseatbelt. D.Don'tyoudaretowalkthroughtheredlight? 4Themainideaofthepassageisthat. A.praisemakeskidsconfident B.rightinstructionskeepkidssafe C.clearcommandsmakekidsdifferent D.positiveinstructionsguidekids

6分ThehottestTVdramainChina﹣NirvanainFireorLangyaBanghasjustended.Millionsofpeoplewaitedeverydayaftermidnightforthelatesttwoepisodes.Areyouoneofthem?Whatisthestoryabout?Whytheshowissopopular? NirvanainFireisbasedonanInternetnovelbyauthorHaiYanwhowasinvitedtopenthescreenplayforthetelevisionadaptation.The55﹣episodeseriessetinafictionalizedkingdomweavestogethertwostorylines﹣oneaboutabetrayedgeneral'srevengeandtheotheraboutprincesfightingforthethrone. TheserieswasputonscreenonSep.19thandthenumberofInternetviewsexceeded140milliontimesthenextday.OnlyduringtheweekofNationalholidaythenumberincreasedby1.6billion. It'snowthehottestChineseTVshowwithaveryhighscoreof9.3onDouban.TheclassicalTVdramaJourneytotheWestproducedin1986iswiththesamescore.PreviousandrecentcostumedramassuchasTheJourneyofFlowerandYunZhongGeonlyscored6.4and3.5. DrawingcomparisonstoTheCountofMonteCristothestoryrevolvesaroundagiftedyoungmannamedLinShuwhosefatherservesasageneral.Alreadyahigh﹣rankingmilitaryofficerbyhisteenageryearsLinShuenjoyedaclosefriendshipwithPrinceXiaoJingyanandwasevenengagedtoPrincessNihuang. Atage17howeverLinShu'slifeturnedupsidedownwhenhisfather'sarmywasframedanddestroyedbyafoxypoliticalrival.LinShuescapeddeathbutduetothepoisoninghisbodybecameweakandfrailandhelosthismartialartsabilities.Fromthenonhisfacewaspaleandhisfingersalwaysice﹣cold. AftertwelveyearsLinShureturnedtohiscountry'scapitalwithanewnameMeiChangsuandanewidentitytheleaderoftheJiangZuoAlliance.HethenbecamethestrategicadviserforhisfriendPrinceJingyanwhohadbeenexiled流放bytheking.DespitetheeffortsofPrinceXiaoJinghengandthecrownprincetowinthethroneforthemselvesMeiChangsusucceedsinpavingtheroadforhisfriendtotakeoveraskingaswellastheavengingtheinjusticesdealttohistroopsmanyyearsbefore. 1Whichofthefollowingistrue? A.LinShuchangedhisfaceandnameinordertotakerevenge. B.LinShuandthecrownprincewerechildhoodfriendsandLinhelpedhimtobetheking. C.NirvanainFirewassetinarealkingdominhistory. D.NirvanainFiresharesthesamescorewithJourneytotheWestonDouban. 2Whatistheunderlinedwordmean? A.madeafalsecharge B.takenadvantageof C.defeated D.gotrideof 3Whatismorelikelytotalkaboutinthefollowingparagraph? A.Howdidtheprincefightforthethrone? B.WherewasNirvanainFireshot? C.WhydidNirvanainFireenjoysuchpopularity? D.WhathappenedtoMeiChangshuafterhesucceededintakingtherevenge?

30分 ABrick砖inLife AyoungandsuccessfulmanagerwasdrivingdownaneighborhoodstreetgoingabittoofastinhisnewJaguar.Hewas1kidsrushingoutfrom2parkedcarsandsloweddownwhenhethoughthesawsomething. 3hiscarpassedonechildappearedandabrickknockedintotheJaguar'ssidedoor.Hesteppedonthe4andturnedtheJaguarbacktothespotfromwherethebrickhadbeenthrown. Hejumpedoutofthecargrabbedthekidand5himagainstaparkedcarshoutingWhatwasthatallaboutandwhoareyou?Justwhat6areyoudoing?ThenhewentonDidn'tyouknowthatbrickyouthrewisgoingto7alotofmoney.Whydidyoudoit? Pleasesir.PleaseI'msorry.Ididn'tknow8elsetodo!beggedtheyoungster. 9mybrotherhesaid.Herolledoffthesidewalkandfelloutofhis10andIcan'tlifthimup. CryingtheboyaskedthemanagerWouldyoupleasehelpmegethim11intohiswheelchair?He'shurtandhe'stoo12forme. Moved13wordsthedriverliftedtheyoungmanbackintothewheelchairand14hishandkerchiefandwipedthescrapesandcutsoftheboycheckingtosee15everythingwasgoingtobeokay. Thankyousir.AndGodblessyouthe16childsaidtohim.Themanthen17thelittleboypushhisbrothertothesidewalktoward18home. Itwasalong19backtohisJaguar﹣alongslowwalk.Heneverdidrepairthesidedoor.Hekeptthedent凹痕to20himnottogothroughlifesofastthatsomeonehastothrowabrickatyoutogetyourattention. 1A.watchingfor B.lookingfor C.headingfor D.leavingfor 2A.above B.between C.in D.through 3A.While B.Before C.As D.After 4A.window B.wheel方向盘 C.brake刹车 D.door 5A.pushed B.pulled C.held D.caught 6A.inearth B.onearth C.afterall D.aboveall 7A.spend B.charge C.cost D.pay 8A.which B.who C.that D.what 9A.It's B.Which's C.That's D.Who's 10A.Jaguar B.wheelchair C.sidewalk D.bike 11A.up B.down C.back D.forward 12A.light B.funny C.terrible D.heavy 13A.beyond B.inside C.outside D.around 14A.brokeout B.tookout C.runout D.gaveout 15A.what B.where C.that D.which 16A.angry B.willing C.satisfactory D.grateful 17A.watched B.glared C.noticed D.witnessed 18A.his B.their C.her D.its 19A.journey B.trip C.walk D.running 20A.attract B.advise C.inform D.remind

8分 C Playingvideogamesandgettingmoneyforitseemslikeadreamjobformanyoftoday'steenagers.Butisitallfunandgames? Bigbusiness Proprofessionalgamingiscertainlybigbusiness.In2017thereweremorethan3000gamingcompetitionsandover10000professionalplayersworldwide.Alargenumberofpeoplewatchtheircompetitionsonlineandsuccessfulgamerscangetmorethan1000000dollarsfromprizemoneyandads.Theindustryisclearlythriving. Whatittakes Becomingaprofessionalisnotjustaboutbeinggoodatplayinggames﹣italsotakesalotofhardwork.Someprogamerspracticeforfourteenhoursaday.Youneedtospendmuchtimeandputallyoureffortstoitsaysex﹣gamerGeorge. Notallfunandgames Itcanbeadifficultjobaswell.Stressisabigproblemforgamers.Tirednessisanotherandinjuries受伤arecommon.TopplayerHaiLamhadwrist手腕problemsafteryearsofprogaming.Careers生涯areshortandmanygamersretire退休beforetheyare30andtrytofindanotherjob. Howeverthebadpointsprobablywon'tchangethedreamsofmanyteenagegamers.AndangryparentsarestilllikelytoheartheexcuseButI'mjustpracticingformyfuturejob! 1Howmanyprofessionalplayersweretherearoundtheworldin2017? A.130000. B.Morethan3000. C.Over1000000. D.Morethan10000. 2WhatdoestheunderlinedwordthrivinginParagraph2mean? A.Gettingworse. B.Doingwell. C.Developingslowly. D.Changingquickly. 3Whatcanweinferfromthelastsentenceofthepassage? A.Childrenareangrywiththeirparents. B.Teenagerspracticegamesfortheirfuturejobs. C.Someteenagersarecrazyaboutplayinggames. D.Parentsstoptheirchildrenplayinggamessuccessfully. 4What'sthemainideaofthepassage? A.Progamingisn'tallfunandgames. B.Thecareerasaprogamerdoesn'tlastlong. C.Beingaprogamerisagoodchoiceforteenagers. D.Beingaprogamerisaneasywaytomakemoney.

下列关于细胞生命历程的叙述正确的是

某兴趣小组运用化学知识进行系列实验． ①甲同学对河水样品进行净化处理流程如图甲．其中加入活性炭是利用其性除去水样中的色素和异味加入氯气的作用是操作M是得到的清水属于选填纯净物或混合物． ②乙同学进行粗盐提纯的实验称量粗盐和所得精盐的质量如图乙所示加入称量物前均已进行去皮操作图一中天平的读数是g．该同学得到的精盐质量偏大可能的原因是．

8分Youmaythinkthatsailingisadifficultsportbutitisreallynothardtolearn.Youdonotneedtobestrong.Butyouneedtobequick.Andyouneedtounderstandafewbasicrulesaboutthewind. FirstyoumustaskyourselfWhereisthewindcomingfrom?Isitcomingfromaheadorbehindorfromtheside?Youmustthinkaboutthisallthetimeontheboat.Thewinddirectiontellsyouwhattodowiththesail. Let'sstartwiththewindblowingfromthebehind.Thismeansthewindandtheboataregoinginthesamedirection.Thenyoumustalwayskeepthesailoutsidetheboat.Itshouldbeata90°angletotheboat.Thenitwillcatchthewindbest. Ifthewindisblowingfromthesideitisblowingacrosstheboat.Inthiscaseyoumustkeepthesailhalfwayoutsidetheboat.Itshouldbeata45°angletotheboat.Itneedstobeoutfarenoughtocatchthewindbutitshouldn'tflap摆动.Itshouldn'tlooklikeonaflagpole.Ifitisflappingitisprobablyouttoofarandtheboatwillslowdown. Sailingintothewindisnotpossible.Ifyoutrythesailwillflapandtheboatwillstop.Youmaywanttogointhatdirection.Itispossiblebutyoucan'tgoinastraightline.Youmustgofirstinonedirectionandtheninanother.Thisiscalledtacking.Whenyou'retackingyoumustalwayskeepthesailinsidetheboat. 1Whatshouldyouconsiderfirstwhilesailing? A.Sailors'strength. B.Winddirections. C.Sizeofsail. D.Wavelevels. 2WhatdoesthewordItinParagraph4referto? A.Thesail. B.Thewind. C.Theboat. D.Theangle. 3Whatdoyouhavetodowhensailingagainstthewind? A.Moveinastraightline. B.Allowthesailtoflap. C.Tacktheboat. D.Lowerthesail. 4Wherecanyouprobablyfindthetext? A.Inatouristguidebook. B.Inaphysicstextbook. C.Inanofficialreport. D.Inapopularmagazine.

分析图象回答下列相关问题 1图示中P680和P700被称为作用中心色素在接受光的照射后会被激发释放出高能电子．它们分布于叶绿体的其功能主要是．提取P680和P700所用试剂为． 2在有关酶的催化作用下C3接受释放的能量并且被上图中还原经过一系列变化形成和． 3在高温干旱环境下某些绿色植物的气孔导度会减小光合速率会下降请解释此现象出现的原因．

ChinahascaughtupwithJapanasAsia'snumberonenationforproducingtopuniversities. WhileJapan'sUniversityofTokyoisthehighest﹣placedinstitutionintheTimesHigherEducationAsiaUniversityRankings2015thecountryhaslostgroundoverallwiththebalanceofpowernowtiltingtowardsmainlandChina. Japanhas19universitiesintheprestigioustop100downfrom20lastyearand22in2013and15ofthosehaveslippeddownthelistbyanaverageof5.8places.BycontrastmainlandChinanowhas21representativesupfrom18lastyearand15in2013andmanyofthesearerisingupthetableincludingPekingUniversityfourthandTsinghuaUniversityfifthwhichhavebothmovedupaplace.WuhanUniversityhasalsoclimbedanimpressive15placestojoint49th. China'sspecialadministrativeregionsarealsoperformingwellwithallsixofHongKong'srankeduniversitiesinthetop50whileMacauhasmadeitsdebutinthetablewiththeUniversityofMacauenteringinjoint40thplace. GerardPostiglionedirectoroftheWahChingCentreofResearchonEducationinChinaattheUniversityofHongKongsaidthatJapan'sdecliningperformanceisduetoacombinationofalotofinbreeding近亲繁殖atitsuniversitieswhichmeansgraduatesteachingatthesameuniversityatwhichtheystudiedresearchfundingbeingconcentratedatitstop﹣tierinstitutionsandfewerpromotionopportunitiesforyoungacademics. JapaniscarefultomaintaintheleadingedgeofitsverytopuniversitiessuchasTokyoandKyotobuthasbeenlesscommittedthanhasChinatopumpingmoreinvestmentintotheuniversitiesonthenextlevelSimonMarginsonprofessorofinternationalhighereducationattheUCLInstitutesaid. 1AccordingtoHigherEducationAsiaUniversityRankings2015inwhichplaceisTokyoUniversityranked? A.No.1. B.No.2. C.No.3. D.No.4. 2Whatdoestheunderlinedwordprestigiousinthethirdparagraphmean? A.Pleasant. B.Comfortable. C.Well﹣known. D.Luxurious. 3AccordingtoGerardPostiglionehowmanyfactorsresultinJapan'sdecliningperformance? A.2. B.3. C.4. D.5. 4Whatcanwelearnfromthepassage? A.HongKongandMacauhavesixworld﹣famousuniversitiesin2015. B.TheJapanesegovernmentpayslittleattentiontoKyotoUniversity. C.PekingUniversityismuchbetterthanTokyoUniversityineducation. D.Japanhad20universitiesinthewell﹣knowntopintheyearof2014.

正确实验操作是实验成功与安全的保证．下列实验操作正确的是

光从空气斜射入水中反射光线如图所示请画出对应的入射光线和折射光线的大致位置．

8分Americankidsaretakingmoreteststhaneverbeforeandthey'restressedout.Ishelpontheway?Justthesightofatestbookletmakessomekidssweat.Forothersitisablankanswersheet.ThentherearethedreadedwordsTakeoutyourNumber2pencil.Allthesefill10﹣year﹣oldChelseaLogowithfear.IstarttotapmypencilonthedesksaysthefifthgraderfromTolucaLakeElementarynearLosAngelesCalifornia.ThenIfeelthebutterfliesinmystomach. Chelseaisnotalone.InarecentsurveybyKidsHealthmorethan70%ofkidsaged9to13saidtheyworryabouttests.It'snowonder.AcrosstheUnitedStatespublicschoolsgivemorethan250millionstandardizedtestseachyear. Whydokidshavetotakesomanytests?TheNoChildLeftBehindNCLBlawrequiresthatstudentsingrades3through8betestedeachyear.Thelaw'sgoalisforallstudentstobeatgradelevelby2014.Studentsmustpassthetestsandmeetotherrequirementsortheirschoolsmaybeshutdown. TheU.S.SecretaryofEducationArneDuncanwantstochangeNCLB.Butthatdoesn'tmeanhefavorsgettingridoftests.Duncanbelievestestsshouldbeusedmainlytoevaluatekids'strengthsandweaknesses.TestsDuncansaysshouldnotbeusedtopunishkidsortheirschoolsforfailure.ThegoalistofocusongreatteachingandlearningDuncansaid. UnderNCLBeachstatesetsitsownstandardsforstudentstomeet.TheresultDuncansaysisthatstatesaremakingthetestseasier.Tofixthisproblem48statesarenowworkingtogethertocreatecommonstandards.IwanttosetahighbarforkidsDuncansayssothey'llbeingreatshapetoachievetheirdreams. Likethemornottestsareheretostay.Sohowcanyouhandletestnerves?Schoolsareteachingstudentstorelaxthroughdeepbreathing.andstretching伸展运动.InOaklandCaliforniaPrincipalZarinaAhmadofPiedmontAvenueElementaryleadsherstudentsinacheertogetthemexcitedaboutlearning. KidsareunderhighpressuresaysAhmad.Therehastobetimeforkidstobekids.Stillweneedteststohelpusassesswhatstudentshaveyettolearn. 1Theunderlinedpartthebutterfliesinmystomachcanbereplacedby. A.guilty B.nervous C.exciting D.proud 2AccordingtothepassagetheNCLBlaw. A.isfocusingonteachingmethodsinschools B.isrequiringschoolstomakethetestsmoredifficult C.istryingtomakeschoolsberesponsibleforstudents D.aimstoevaluatekids'strengthsandweaknessesbymeansoftests 3WecanlearnfromthepassagethatArneDuncan. A.isstronglyagainsttests B.suggestsclosingsomeschools C.isconcernedaboutstudents'development D.suggestseachstatesetitsownstandard 4Wecanlearnfromthelasttwoparagraphsthat. A.it'spossibletogetridoftests B.schoolshavenogoodwaytodealwithstudents'stress C.testshelpassesswhatstudentshavetolearn D.schoolsareawareofstudents'stresscausedbytests

如图是某种加钙食盐包装标签上的部分内容．请仔细阅读后回答以下问题 1为了检验此盐中是否含有碳酸钙在家庭厨房里可选用的物质是． 2为了测定此盐中的碳酸钙含量取50g这种盐溶于水加入足量盐酸生成0.66g二氧化碳．请计算此加钙食盐中碳酸钙的质量分数．

Investinginyourself Figuringouthowtoinvestyourmoneycanbeadifficulttask.Thisissomethingthatyouwillwanttolearnhowtodo. 1Thingsthatwillimproveyourknowledgeskillsorhealthareallgreatinvestments.Howeverbeforeyoustartyouneedtobeclearaboutwhatyouwillgainoutofdoingallofthesethings. Youmaythinkinvestinginyourselfmeansinvestinginyoureducation.2.Therearesomeotherthingsyoucandoaswellasbuyingagymmembershiporlearninganewskill. Sowhataresomespecificthingsyoucando?3.Readingbookscanreallyexpandyourmindandallowyoutolearndifferentskillsandgainknowledge.I'mtalkingaboutthebookswhereyouwillactuallylearnanewskillnotfictionbooks. Youcanalsotakecoursesandattendseminars.Theseprogramsaretaughtbypeoplewithahighlevelofknowledgeorskill.4.Onlyinthiswaycanyouavoidbeingfooledbysomesalespresentation. Moreoverinvestinginyourselfisasafewaytokeepyourmoney.Althoughasavingsaccountisseenasthemostsecureinvestmentthatisn't100%safe.Evenifyouneverexperienceyourbankclosingdownthereturnislittlewheninflation通货膨胀istakenintoconsideration.5.Butovertimetheywillshowupintermsofyourhappinesslevelaswellasyourlevelofsuccess. A.Thisisjustoneway. B.Thebenefitswillstaywithyou. C.Ifyouaren'tareaderyoushouldstartwiththat. D.Themoreyoudothisthemorevaluableyouwillbe. E.Ofcourseyouneedtodosomeresearchbeforeinvesting. F.Thebestwaytoinvestyourmoneyistoinvestitinyourself. G.Whenyouinvestinyourselfyoumaynotseegainsrightaway.

下列物态变化事例中属于液化的是

大数据处理能及时获取更多的信息．以下图象与实验表述对应正确的是

如图所示请根据通电螺线管周围磁感线的方向判断电源的+﹣极和小磁针的N极并在图中标出．

30分WhenIwasinmiddleschoolIgotmadatmyparentsbecausetheywouldnevergiveanythingtothehomeless.Istillrememberonafamily1inWashingtonD.C.therewasahomelessmandownthestreet.OnourfinaldayinthecitywhenmyparentswentforaneveningwalkIwentoutofourhotelroom2andrandownthestreettothehomelessman. Helookedatmewith3surelynot4anythingfromamiddleschoolgirl.Iranintothesupermarketwithout5downtheblockand6fivehamburgersthreebagsofchipsonechocolatebarmyfavoritecandyandabottleofwater.Iranbackwithabig7onmyfaceand8thebagstohim.Healsosmiledatme.Hissmilehasbeeninmy9eversince. Whenmyparents10mydadaskedmeifhadrememberedthehomelessmandownthestreetfromourhotelandInervouslynodded.Hethentoldme11theywerereturningfromtheir12thehomelessmanwassharingbags13offoodwithotherhomelesspeopleandtheywereallsmilingastheyate.Ismiledatmydadbut14tothisdayhaveItoldhimthe15storyofthathomelessman. Istillhaven'tforgottenthatman'ssmilebutIwishIhadthe16todothismoreoften.Onesmall17actofamiddleschoolgirlcanbeginarippleeffect连锁反应ofsmiles.Soplease18asmilesandgivesome19tothehomelessevenifyoucan't20tohelpthem. 1A.relaxation B.entertainment C.vacation D.ceremony 2A.nervously B.proudly C.sincerely D.secretly 3A.imagination B.curiosity C.satisfaction D.sympathy 4A.expecting B.begging C.admitting D.requiring 5A.doubt B.recognition C.hesitation D.exception 6A.bought B.accepted C.ordered D.delivered 7A.smile B.sweat C.mark D.sign 8A.fetched B.handed C.contributed D.devoted 9A.experience B.view C.opinion D.mind 10A.fled B.waited C.returned D.approached 11A.before B.as C.until D.though 12A.concert B.theater C.cinema D.walk 13A.full B.filled C.crowded D.occupied 14A.ever B.rarely C.never D.seldom 15A.genuine B.honest C.generous D.true 16A.patience B.courage C.confidence D.ambition 17A.priceless B.careless C.helpless D.fearless 18A.share B.receive C.value D.force 19A.donation B.recognition C.dignity D.opportunity 20A.refuse B.afford C.wait D.choose

假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号Λ并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下画一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Moreandmorepeoplearewillingtoenterwordsviaakeyboardoncomputersandmobilephones.Itseemsthatwritingbyhandisnowignoring.InordertoraiseawareofhandwritingwewillholdahandwritingexhibitioninthehallnextFriday.EveryonewhowantstotakeinpartshouldbringatleastoneworkthatcouldbeproverbsorfamousquotationswritteninapenorChinesebrush. Asweallknowstudentscandevelopthecharacteristicofbeingcarefullybyhandwriting.Asresulttheywilldootherthingscarefullytoo.Theycanalsocontrolthemandimprovetheirpatient.Writingisakindofartandability.Solearninghowtowritebeautifullyisveryimportant.IhopeeveryonecouldjoinusandI'msureyou'llsomethingformthisactivity.

相关说法正确的是

吊兰根在单侧光照射下会背光弯曲生长．进一步研究发现单侧光影响吊兰根背光弯曲生长需Ca2+参与．为验证该发现不需要对吊兰根进行的处理是

下列对宏观现象的微观解释错误的是

ABCDE分别是锌硫酸氢氧化钡硫酸铜和碳酸钠五种物质中的一种如图所示﹣表示相连的两种物质能够发生反应其中D的溶液呈蓝色A与B反应生成的气体是光合作用的原料之一．下列分析和判断错误的是

如图水平地面ABCD以O点为界AO段是一种材质OD段是另一种材质．细线一端系在物体上绕过轻质滑轮另一端系在墙上拉滑轮的水平力F恒为4N物体经A点开始计时此后各段路程及耗时见下表．下列说法中正确的是

大气中的氮氧化合物 氮氧化合物NOx种类很多造成大气污染的主要是一氧化氮NO和二氧化氮NO2．NO通常为无色气体熔点为﹣163.6℃沸点为﹣151.5℃密度比空气略小微溶于水．它的性质不稳定易与空气中的氧气发生反应生成NO2．NO结合血红蛋白的能力比CO还强更容易造成人体缺氧．NO分子作为一种传递神经信息的分子在使血管扩张增强免疫力记忆力等方面有着极其重要的作用．NO2通常为红棕色有刺激性气味的气体密度比空气大溶于水生成硝酸HNO3和NO工业上利用这一原理制取HNO3．NO2能使多种织物褪色损坏多种织物和尼龙制品对金属和非金属材料也有腐蚀作用．城市大气中的NOx大多来自于化石燃料的燃烧．天然气的主要成分是甲烷同时也含有微量的氮杂质．经测算天然气煤和石油燃烧产生NOx的量分别为6.35kg/t8～9kg/t9.1～12.3kg/t．以汽油柴油为燃料的汽车尾气中NOx的浓度相当高．在非采暖期城市一半以上的NOx来自机动车排放． 依据文章内容回答下列问题 1造成大气污染的氮氧化物主要是． 2区分NO和NO2最简单的方法是． 3与煤和石油相比天然气是比较清洁的燃料结合数据解释原因． 4请说出一条减少NOx污染的具体措施是． 5下列有关NO和NO2的说法错误的是． A．二者可以互相转化 B．可以用同一种方法收集 C．对人类都有利也有弊 D．二者化学性质不同的原因是所含氧原子的个数相同

ThedeadliestEbola埃博拉病毒outbreakinrecordedhistoryishappeningrightnow.Theoutbreakisunprecedented空前的bothinthenumberofpeoplewhohavegottensickandinthegeographicscope.Andsofarit'sbeenalongbattlethatdoesn'tappeartobeslowingdown. Ebolaisbothrareandverydeadly.Sincethefirstoutbreakin1976Ebolaviruseshaveinfectedthousandsofpeopleandkilledroughlykilled60percentofthem.Symptomscancomeonquicklyandkillfast. ThecurrentoutbreakstartedinGuineasometimeinlate2013orearly2014.IthassincespreadtoSierraLeoneandLiberiaincludingsomecapitalcities.AndoneinfectedpatienttraveledonaplanetoNigeriawherehespreadthediseasetoseveralothersandthendied.CaseshavealsopoppedupinvariousothercountriesthroughouttheworldincludinginDallasandNewYorkCityintheUnitedStates. TheEbolavirushasnowhitmanycountriesincludingGuineaLiberiaSierraLeoneNigeriaSenegalandtheUnitedStates.Theviruswhichstartsoffwithflu﹣likesymptomsandsometimesendswithbleedinghasinfectedabout6500peopleandkilledmorethan3000sincethiswinteraccordingtotheWorldHealthOrganizationonSeptember302014. Therearesomesocialandpoliticalfactorscontributingtothecurrentdisaster.BecausethisisthefirstmajorEbolaoutbreakinWestAfricamanyoftheregion'shealthworkersdidn'thaveexperienceortraininginhowtoprotectthemselvesorcareforpatientswiththisdisease. JournalistDavidQuammenputitwellinarecentNewYorkTimesarticleEbolaismoredangeroustohumansthanperhapsanyknownvirusonEarthexceptrabies狂犬病andHIV.Anditdoesitsdamagemuchfasterthaneither. Hopefullyresearchersareworkingtofinddrugsincludingarecent﹩50millionpushattheNationalInstitutesofHealth.Andscientistsareworkingonvaccines疫苗includinglookingintoonesthatmightbeabletohelpwildchimpanzeeswhicharealsosusceptibletothedisease.ThefirsthumanEbolavaccinetrialisscheduledtostartinthespringof2015. 1AccordingtothepassagewhichofthefollowingaboutEbolaistrue? A.TheEbolaoutbreaknowisthebiggestoneinhistory. B.Ebolabreaksoutquicklybutitisundercontrolnow. C.Ebolaisdeadlyandcommonsoitkillsalotofpeople. D.Ebolakilledabout60thousandpeoplequicklyin1976. 2TheEbolaviruswasbroughttoNigeriaby. A.aflyingbird B.aninfectedpassenger C.hotAfricanweather D.ahealthorganization 3Thelastparagraphmainlytellsusthat. A.itwillbeahugewastewhenresearchersspendlotsofmoneyfindingacure B.thevaccinescanbeeffectivetowildchimpanzeesbutnottothehumans C.therewillbeanoptimisticfutureinwhichwecandefeatthedisease D.wecanusethevaccinetocurethepatientscompletelyin2015'sspring 4Whatisthebesttitleofthepassage? A.Ebola﹣﹣﹣﹣TheAfricanLocalDisaster B.Ebola﹣﹣﹣﹣TheNewly﹣FoundDisease C.Ebola﹣﹣﹣﹣AMoreEffectiveVaccine D.Ebola﹣﹣﹣﹣TheDeadlyVirusOutbreak

30分Allofuscangiveothersahandaslongaswearewillingtodoso.Actuallytherearesomepeopledoingkindthingsallthetime.SpreadingkindnessonegooddeedatatimeisKarlaGibson'smission.Iwisheveryonecouldjoinme.Therearesomany1thingsgoingonintheworld;ImeaneverydaysaidKarla. Karlahadthe2andsenseofdutyinDecemberof2013.Thesinglemotherofthreesaidshetendedtogetdownaroundtheholidayssoshe3todosomethingtocheerothersup.ShestartedaFacebookpageand4hergooddeedseachdayfromfeedingthehomelesstogivingEastergiftstotheincarcerated囚犯.Shehopedto5others. Wehavetodosomething.Our6canmakeadifferenceinsomeone'sday.You7knowwhensomeonemightbehavingtheirworstdayandthensomethinglikebuyingthemacoffeecanchangetheirwholeattitudeKarla8. Karla'sgreatest9sofarhadtodowithcoffee.OnSeptember27thKarla'sbirthdayshewenttoherlocalStarbucksandgavethe10$127topayforotherpeople'sdrinks.Shesatattheendofthedrive﹣thruholdinga11thatreadHaveagreatday.Sheendedup12about23customers.Itwasreallyfun.Itwas13oneofthebestbirthdaysevershesaid.Herkindnessthatdaydidn'tgo14.Onecouplewassogratefulthattheysurprisedherwithflowersandballoonstoshowtheir15. Karla'sactsofkindnesshavebecomea16affair.Hertwosonsarealways17others.SometimesI'llaskKyle‘Sodidyoudoanythingextranicetoday?'andhe'slike‘Somebody18somethinginthehallwayandIpickeditup'or‘Iheldthedoorforsomeone'thatkindofthingsaidKarla. It'sbecauseofMomthattheboysthinkit's19togiveahandtoothers.Ithinkit'sagreatideaofhers.It'salwaysnicetohelpsomeoneout20theyreallyneeditsaidKarla's15﹣year﹣oldsonChad. 1A.good B.bad C.new D.casual 2A.commitment B.appointment C.preference D.success 3A.managed B.agreed C.hesitated D.decided 4A.did B.mentioned C.shared D.missed 5A.greet B.inspire C.introduce D.remember 6A.kindness B.happiness C.stories D.sadness 7A.still B.often C.never D.even 8A.whispered B.explained C.reported D.replied 9A.surprise B.challenge C.concern D.moment 10A.cashier B.customer C.beggar D.secretary 11A.mark B.sign C.symbol D.flag 12A.payingfor B.pickingup C.payingoff D.pickingout 13A.occasionally B.usually C.probably D.hardly 14A.unoccupied B.unnoticed C.unorganized D.unquestioned 15A.wisdom B.existence C.generosity D.appreciation 16A.society B.love C.holiday D.family 17A.encouraging B.inviting C.helping D.affecting 18A.dropped B.bought C.found D.fell 19A.strange B.lucky C.cool D.funny 20A.after B.though C.unless D.when