贝茨拟态：不同种类的蝴蝶在外形和色彩上彼此极为相似的现象称为拟态．有些蝴蝶是有毒的，通常都具有色彩鲜艳的警戒色，以使捕食者易于识别和回避；而另一些无毒的蝴蝶，往往因在形态和色彩斑纹上模拟前者而获得安全上的好处． （1）上述模拟现象的研究属于　 　（填生命系统层次）水平的研究，在贝茨拟态中，被模拟种和模拟种　 　（一定/不一定）分布在同一地区；被模拟种的数量一般会比模拟种　 　（多/少/不确定）． （2）普累克西普斑蝶的毒素可以被当做药物使用，这体现了生物的　 　价值；因为药用价值，普累克西普斑蝶被大量捕杀，副王峡蝶（现代型）的种群密度会　 　，原因是　 　．外形和色彩上彼此极为相似的副王峡蝶和普累克西普斑蝶体现了生物的　 　多样性．

﹣MaryhowdidyourMathtestgo? ﹣IhadthoughtIbutinfactIcameinthetop10inmyclass. A.shouldhavefailed  B.couldn'thavefailed  C.mighthavefailed  D.shouldn'thavefailed

生活中处处都有化学下列说法正确的一项是

2.5分下列选项属于化学变化的是

ClO2熔点为﹣59.5℃沸点为11.0℃温度过高可能引起爆炸易溶于水易与碱液反应．工业上用潮湿的KClO3和草酸H2C2O4在60℃时反应制得．某同学设计了如图装置来制取收集ClO2并测定其质量． 实验Ⅰ制取并收集ClO2装置如图1所示． 1装置A除酒精灯外还必须添加装置目的是．装置B应该添加填冰水浴沸水浴或60℃的热水浴装置． 2装置A中反应产物有K2CO3ClO2和CO2等请写出该反应的化学方程式． 实验Ⅱ测定ClO2的质量装置如图2所示．过程如下 ①在锥形瓶中加入足量的碘化钾用100mL水溶解后再加3mL硫酸溶液 ②按照图2组装好仪器在玻璃液封管中加入水浸没导管口 ③将生成的ClO2气体由导管通入锥形瓶的溶液中充分吸收后把玻璃液封管中的水封液倒入锥形瓶中再向锥形瓶中加入几滴淀粉溶液 ④用cmol•L﹣1Na2S2O3标准液滴定锥形瓶中的液体共用去VmLNa2S2O3溶液已知I2+2S2O32﹣═2I﹣+S4O62﹣． 3装置中玻璃液封管的作用是． 4滴定终点的现象是． 5测得通入ClO2的质量mClO2＝g用整理过的含cV的代数式表示． 6判断下列操作对mClO2测定结果的影响填偏高偏低或无影响． ①若在配制Na2S2O3标准溶液时烧杯中的溶液有少量溅出则测定结果． ②若在滴定终点读取滴定管刻度时俯视标准液液面则测定结果．

整合素β7蛋白可介导免疫细胞进入小肠内壁这些免疫细胞可通过降低GLP﹣1水平进而减少胰岛素分泌．据此分析下列相关叙述错误的是

下列实验操作现象与对应的结论或解释正确的是

水是生命之源．下列有关水的说法正确的是

水培是一种新型无土栽培其肥料是植物营养液下列营养液与草木灰草木灰显碱性混合使用后会降低肥效的是

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∧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:在错的词下划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. TheoldsayingTheearlybirdcatchesthewormshowustheimportanceofplanningworkinghardandtryingconstant.Toachieveoutstandingresultsmostpeoplemustplanaheadandworkdiligentlytoovercomeallkindofdifficulties. Thathasbeenmyownexperienceeither.WhenIfirststartedhighschoolIseldompassedrayexamssoIneverpreparedwell.LatermyteacherMr.Blackadvisedmeplaneverythingintheadvance.Sheaskedmetostudyhardaswell.AfterayearofputtinghisadviceontopracticeIcannoweasilypassallmyexams.Therearenoshortcutstosucceed.

林窗主要是指森林群落中老龄树死亡或因偶然因素如火灾龙卷风等导致成熟阶段优势种的死亡从而在林冠层造成空窗的现象．生态学家对某林窗的生态变化进行了研究请回答下列问题 l判断该林窗内的群落演替为次生演替依据是．随着时间的推移艾蒿紫荆的种群密度逐渐下降原因是． 2在调查上述物种的种群密度时为减少误差应注意．若用标志重捕法调查林窗内林鼠的种群密度所得数据往往比实际结果偏大可能的原因有列举两项． 3在研究该林窗能量流动的过程中第8年测得植物光合作用制造的有机物中的含碳量为9690kg/hm2•a被初级消费者摄入的仅为2070kg/hm2•a还有3600kg/hm2•a未被利用则其他部分是指中的含碳量．

Howtobemorefriendlyandsocial Ifyoutendtobeshyitcanfeeluncomfortabletoputyourselfouttheresocially.1Youcanmaketheextraefforttobemorefriendlyandopentootherswhilestillkeepingyourownpersonality. 2Thekeytoconnectingtootherpeopleisshowinginterestinthem.Whenyou'retrulyinterestedinsomeoneelse'sthoughtsfeelingsexperiencesstoriesandopinionsthey'lllikeyouforit.You'llmakefarmorefriendsbyshowingyourinterestratherthantryingtogetpeopleinterestedinyou. Begenuine真诚的.3Ifyou'rejustpretendingtolistenorcareotherswillpickuponit.Ratherthanpromotinggreaterconnectionyoureffortswilllikelyhavetheoppositeeffect.Noonelikestobemanipulated摆布.Ifyou'renotactuallyinterestedintheotherpersonthenstoptryingtoconnect. Payattention.4Bypayingcloseattentiontowhattheysayandhowtheyinteractyou'llquicklygettoknowthem.5Don'tignorethedetailssuchasrememberingsomeone'spreferencesthestoriesthey'vetoldyouandwhat'sgoingonintheirlife. A.Faking伪装takestalent. B.Focusonothersnotyourself. C.Littlethingsgoalongway. D.Gettingtoknowthemisthekey. E.Makeanefforttotrulylistentotheotherperson. F.Showinginterestinotherscan'tbefaked. G.Butyoudon'thavetobenaturallyoutgoingorthelifeofthepartytomakenewfriends.

LiMingyangwho______asthemaincenterontheChineseWomen'sBasketballTeamfortwoyearsisnowamemberofaJapanesebasketballclubwhichisconsideredshamefulbymanyChinese. A.hasserved B.hadserved  C.served D.wasserving

一个长方形的宽是3cm长是宽的2倍这个长方形的面积是平方厘米周长是厘米．

Jealousofthekidsatschoolwhoaresmarterthanyouandseemtolearnmorequickly?Don'tworry.1 2HoweveraccordingtoarecentstudyIQcanrise﹣﹣notjustbyoneortwopointsbutbyasmanyas21points! ScientistshavefoundthatIQchangesarelinkedtochangesinpartofthebraincalledgraymatterwhichwasseentogrowandbecomedenserinthebrainsofpeoplewhoseIQsimprovedgreatly.3Oneistotrainyourshort﹣termmemory.Previousresearchhasproventhatshort﹣termmemoryisthebasisforintelligencesotryingtorecognizeorretellsomethingthatyouhaveseenorheardcanhelpraiseyouroverallbrainpower.4 Agoodnight'ssleepwillalsohelpimproveyourconcentration.5Ithelpsyoustayfocusedforlongerthenextday. Scientistshavealsofoundthatexercisehelps.Walking30minutesadayfivetimesaweekanddoingexercisewillhelpyoubecomemoreknowledgeableaswellashealthierandfitter. A.Thereareseveralwaysofincreasingyourbrain'sgraymatter. B.Yourbraindealsmoreefficientlywiththingsyoutrulylike. C.Withabitofbraintrainingthechancesarethatyoucanbeassmartastheyare. D.Somaybeit'sagoodideatogetyourbrainintrainingrightaway. E.Gettingenoughsleepislikepushingtheresetbuttoninyourbrain. F.Themoreyouworkonitthebetteryouwillbecome. G.Peopleusedtoassumethataperson'sIQwasunchangeable.

mewhenyougetitthroughandI'llpickyouupatyourworkplace. A.Calling B.Call C.Called D.Tocall

根据短文内容从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项. Manyofusfeelsleepyinwinterbutotherspeciesoftentakeitastepfurtherandhibernate冬眠.36Thebodyslowsdownandbreathingtemperatureandmetabolicandheartratealldecrease.Dormice睡鼠headundergroundandhedgehogs刺猬hunkerdownintheirnests. Hibernationseemstodothemgood.Buthumancannotbeddownforlongperiods.37Toworkoutwhywedonotfirstweneedtofindoutwhyanimalsdo.Themostobviousreasonforhibernatingistoavoidthecold.Conditionsareharshandthereislittlefoodtoeatasfewerplantsaregrowing.38Thentheyliveoffbody﹣fatreservesuntilit'stimetowakeup. Buta2015studyofdormicefoundthattheycontinuedhibernatingevenwhencoldconditionshadended.39Thekeyissueseemedtobeconnectedwiththeirmainfoodbeechtrees.Thedormiceneedtheirseedstoreproduceorforthebabydormicetogainenoughbodyfat.Inaharvestyeartheyproduceplentyofseeds.Somehowthedormicecouldpredictit.Otherwisetheystopreproductiontheseyearsandincreasetheirsurvivalbystayingunderground. 40Bystayingoutofsightthedormiceavoidedbeinghuntedbytheirpredators天敌likeowls.Untilrecentlypeoplethoughthibernationwasjustaboutenergysavingadefenseagainstcoldweatherandfoodshortageandnowwethinkit'smorepredatoravoidance.Thesurvivalratesinhibernationarecloseto100%. A.Soobviouslythereareotherreasons. B.Theywerehibernatingundergroundtosaveenergy. C.Hibernationisanextendedperiodofenergy﹣savingstate. D.Allkindsofanimalshibernatefrominsectstobirdsandprimates. E.Whyifitissobeneficialdowenothibernate? F.Thedormicehadanotherreasontostayunderground. G.Somanyanimalsfattenthemselvesupduringsummer.

如图是甲乙丙三种固体物质的溶解度曲线．下列叙述错误的是

WiththedevelopmentoftheInternetelectronicpayment1becomemorepopulartopaybillssofar.2actualtheprobabilityofpayingbillselectronicallyisdecreasingwithageandincreasingwitheducationand3seemsthatwomentendtouseelectronicpaymentata4highratethanmen.Inadditionsomeconsumersmayrespondnegativelytofeeswhenthey5chargebybanksforelectronicdeals6maykeepsomeconsumersawayfromelectronicpaymentandtowardsignaturepayment.Moreoverconsumers'useofelectronicpaymentwillvarywithfinancialconditionsandexpectationsaboutthefuture.Forexampleiftheyhavenegativeexpectationsabouttheirfuturefinancialconditionscustomersaremorelikely7payelectronically. On8wholebusinessesofferelectronicpayment9servicewhichnotonlyimprovecustomerservicebutalsocutcostsreducelatepaymentsandprovideagreenerbusinesssolution10customersimprovingthecompany'scompetitiveadvantage.

如图是某学生在制作DNA双螺旋结构模型活动中制作的一个模型①②③④分别代表四种不同的碱基模型下列叙述正确的是

鸡的孵化期是21天比鸭的孵化期短．下面理解错误的是

InternationalAirportSheremetyevoMoscow IfYou'veLostPersonalBelongings •OnBoard﹣Contacttheairline'srepresentatives •AttheAirport﹣Contact: ﹣SheremetyevoPoliceDepartment+7495578﹣22﹣55 ﹣UnclaimedluggagestorageroominTerminalC+7495578﹣23﹣26 ﹣UnclaimedluggagestorageroominTerminalD+7499500﹣65﹣52 domesticflights +7495753﹣86﹣41 internationalflights ★WhencollectingLostandFounditemsyoushallhaveanidentificationdocumentaboardingpassoraticketandalsotoindicateaplacewheretheitemswerelostandprovetheyareyours. IfYourLuggageIsLostorDamaged BeforeleavingthearrivalareapleaseturntotheLostandFoundcountertofileareport.Thewrittenclaimshallbesubmittedtotheairlinecompanynotlaterthansevendaysfromthetimewhentheluggagewastobecollected. Ifyourluggageisnotfoundwithintwenty﹣onedaysofthetimewhentheclaimwasfiledyouhavetherighttoclaimdamagesintheamountofnotmorethan600rublesperkilogram.Amountrefunded退款forahandluggagelostthroughthefaultofanairlineisnotmorethan11000rublesregardlessofitsweight.Amountrefundedfordamagedluggageiscalculatedbasedonthesametariffs关税. Keepyourflightdocumentsaticketboardingpassluggagetaganddelayedluggagereportfiledattheairportuntiltheendoftheprocedureforsearchingforyourluggage. LostandFoundserviceofAeroflotAirlines+7495544﹣33﹣25 from9:00to20:00 +7495753﹣86﹣41 24hours ★Forfurtherinformationpleasecontacttheairline. 1Whatshouldyoudoifyoufindyourpersonalpossessionslostonboard? A.Submitaclaimtothecompany. B.GototheLostandFoundcounter. C.Contacttheairline'srepresentatives. D.Contacttheunclaimedluggagestorageroom 2Howmuchmoneycanyouclaimifyour20﹣kilomgramhandluggageislost? A.600rubles. B.11000rublesatmost. C.12000rublesatleast. D.12000rublesatmost. 3Whichnumberwillyouprobablydialtoseewhetheryourlostluggagehasbeenfound? A.7495578﹣76﹣65 B.7495544﹣33﹣25 C.7499500﹣65﹣52 D.7495753﹣86﹣41

Areyouanoptimist?Doyoulookatyourglassandseeitashalffull?Doyoubelievethateverycloudhasasilverliningandthatthingsgenerallyturnoutforthebest?Doyoubelievethatifsomethingismeanttobeitwillbe?Ifyoureplyyestoallofthesequestionsthenyouareanoptimist.Youprobablyareenthusiasticcheerfulandoutgoing.Youmaybesuccessfulatworkandinlove. Butyoumaybemisguidedbecausethingsdon'tturnoutforthebest.Youmaybelievethatwhenondoorclosesanotheroneopensforexampleyoumayfailtoobtainanewjob;anotherchancewillcomearoundsoon.Wrong.Whenonedoorclosesanotherdoorslams砰然关上inyourface.That'sbitterreality. Nowabookhasbeenpublishedwhichconfirmswhatpessimists悲观者havesuspectedallalong.it'scalledThePositivePowerofDefensivePessimism.Itsauthorarguesthatdefensivepessimismcanleadtopositiveresults.Defensivepessimismisastrategyusedtomanagefearanxietyandworry.Defensivepessimistsprepareforthetingsbysettinglowoutcomesforthemselves.Theycarefullyconsidereverythingthatmaygowrongandplanforwaystohandletheseproblems.Andthisgivesthemasenseofcontrol.LawrenceSannoapsychologyprofessorsaysWhat'sinterestingaboutdefensivepessimistsisthattheytendtobeverysuccessfulpeoplesotheirlowopinionofthesituation'soutcomesisnotrealistic.Theyuseittomotivatethemselvestoperformbetter. Sofarsogood.Thisisnotrocketscience.Defensivepessimistspreparecarefullyandconsiderwhatmightgowrongwhetheratworkondateoreveninasportsgame.Itmakessensetohaveaback﹣upplan.TherearemanysayingsinEnglishurgingcaution.ForexampleDon'tputallyoureggsinonebasket. AndDon'tcountyourchickensuntiltheyhatch.Tohaveaconfidentandoptimisticapproachtolife'sproblemsisgood.ButlistentowhatWoodyAlientheAmericancomediansaysConfidenceiswhatyouhavebeforeyouunderstandtheproblem. Thereareprosandconstobeinganoptimistandapessimist.Don'tfeelbadifyouseetheglasshalfempty.YouarearealistButlightenupandhookupwithsomeonewhoseesthesameglasshalffull. 1What'sthepassagemainlyabout? A.Abookthathasrecentlybeenpublished. B.Howtobecomesuccessfulinlife C.Thedangersofbeingtoooptimistic. D.Thebenefitsofdefensivepessimism. 2TheunderlinedsentenceThisisnotrocketsciencePara.4means. A.it'snotadangerousthingtodo B.itisquitesimpletounderstand C.thecostisnotsohigh D.thereisnorealproof 3WhichofthefollowingEnglishexpressionswouldadefensivepessimistbelieve? A.Don'tputallyoureggsinonebasket. B.Theglassishalffullnothalfempty. C.Whateverwillbewillbe. D.Everycloudhasasilverlining. 4Thewriterwouldprobablydescribehimselfas. A.anoptimist B.adefeatist C.arealist D.ascientist

化学用语是学习化学的基本工具请用化学符号填空． 1地壳中含量最多的金属元素 22个氮分子 3硫酸亚铁 4最简单的有机物

小明同学设计了如下实验方案分离NaCl和CaCl2两种白色粉末的混合物W请回答下列问题 1试剂A的化学名称是． 2操作Ⅱ需要用到除烧杯玻璃棒之外的玻璃仪器还有． 3沉淀B洗涤后加入稀盐酸的化学方程式是该反应的反应类型是．

AlibabahasbecomeChina'slargestonlinecommercialcompanyaprofitof1.47billionyuanin2010. A.earns B.earning  C.earned D.tohaveearned

﹣HasIngridhandedinherpaperyet? ﹣I'mnotsure.Sheonitlastweek. A.wasworking B.hasworked  C.worked D.hadworked

在正方形长方形等腰梯形等边三角形和圆中请按照对称轴的条数从多到少顺序排列＞＞＞＞

一辆卡车行驶2390米时前方道路出现事故等候15分钟后继续前行又走了3610米到达目的地．问这辆车行驶了多少千米

如图是红黄蓝三根彩带红黄彩带的长度比是23黄蓝彩带的长度比是67．红彩带的长度是蓝彩带的%红彩带的长度比黄彩带短%．计算结果百分号前面保留一位小数

WhenIsawmy10﹣year﹣oldavoidingthedirtyplateinthesinkormy8﹣year﹣oldfeelinguncomfortableaboutthewetsandinherhandsI'mremindedofatimewhenIwasunwillingtogetmyhandsalittledirty. Myparentsowneda500﹣acrefarminMontanatoraiseanimalssuchascowssheephorsesandsoon.Itwasduringthetimeofnewlifeanewbornlamboracalfthatmyfavoritechildhoodmemorytookplace.OneexceptionallycolddayIwascheckingonthesheepwithmymotherwhenshespiedaewe母羊introuble.Thepoorthingwastryingtodeliverherbabylambandneededourhelp.Mymothercalmlyheldtheewe'sheadandinstructedmetograbholdofthetwoprotruding突出legs. Ihesitatedandmusthavehadquitealookofpaniconmyyoungface.TheslimylittlethingsweredefinitelynotsomethingIwantedtotouch.ButIworkedupmycourageandwrappedmyfingersaroundthem.Icanstillrecallthefeelofunexpectedlyweaklegsandtheirsharplittlehoovesasifithappenedyesterday. MyheartpoundedinfearandexcitementasIpulledwithallmystrength.ThelambwasdeliveredsafelyandI'dneverseenanythingsobeautiful. IwasnostrangertoseeingfarmanimalsbeingbornbuttohaveahandinitwassomethingItreasuredthenandwilltreasureforever.IrememberfeelingexcitedwithdelighttoseemylambbeinglickedcleanbyhermotherandI'msureeveryonegotverytiredofhearingmetellandretellmyheroicstory.LookingbackI'msogladthatIdidn'trefusetogetmyhandsdirty.IfIhadthewonderfulmomentandthepreciousmemorywouldhavebeenlost. 24.Whatimpressedthewritermostduringherchildhood? A.Herdirtylittlehands. B.Herparents'largefarm. C.Helpingdeliverababylamb. D.Raisinganimalsonthefarm. 25.Howdidtheauthorfeelwhenshewasaskedtohelpaewedeliverherbaby? A.Somesympathy. B.Ratherfrightened. C.Quiteastonished. D.Highlydelighted. 26.Whatpointdoestheauthortrytomakeinthelastparagraph? A.Itisnotunusualtoseeanewlifecomingintotheworld. B.Itisnoteasytomakeupandtellaheroicstoryindailylife. C.Memoriesformedduringchildhoodareworthvaluingalllifelong. D.Youneedtogetyourhandsdirtytoexperiencesomethingprecious. 27.Whatcouldbethebesttitleforthepassage? A.AValuableLifeLesson B.ATidyandCleanChild C.AEweDeliveringherBaby D.ABeautifulNewbornLamb.

修一条长1千米的水渠已经修好了440米剩下的如果每天修80米还需要多少天修完

84消毒液是生活中常见的物质主要用于杀菌消毒和漂白．如图为某厂家生产的84消毒液的商品标签 工业上一般用反应Cl2+2NaOH＝NaCl+NaClO+H2O生产NaClO．请回答 1计算该消毒液NaClO中氯元素的质量分数结果保留0.1%． 2生产1吨该消毒液至少需要多少千克烧碱 3某同学将50g含NaClO5%的84消毒液稀释至1%需向原溶液中加入多少克水

下列人体所必需的元素中缺乏后会导致贫血的是

设N0为阿伏加德罗常数的数值．下列叙述正确的是

长方体的表面中不可能有正方形．．判断对错

1TotallyWildHotelisspecialbecauseof. A.itshighprice B.itsgoodbreakfast C.thelovelygiraffes D.theoldbuildings 2AccordingtothetextpeoplecaninKenya. A.cheeroncamelsinLamuOldTown B.havebreakfastwithzebrasinTotallyWildHotel C.seelionszebraselephantsinEastNationalPark D.watchthebrightpinkbirdsnearLakeNakuru 3willmostprobablybeinterestedinthetextabove. A.Peoplewhoenjoytravelling B.Scientistswhostudybirds C.Playerswhoaregoodatrunning D.Peoplewhohaveapainintheneck

EnvironmentAwarenessWeek RegalConventionCentreHalls1﹣4 24﹣30March201110:00am﹣9:00pm Freeadmissionforall! SavetheenvironmentSaveourfuture Ourenvironmentneedshelp.Withtheparticipationofmorethan50organizationsEnvironmentAwarenessWeekisthebiggestpubliceducationeventdedicatedtoenvironmentalprotectionandconservation.Don'tmissit!Comeandknowmoreabout: TheThreatstoEarthHall1﹣Whatisglobalwarming?Howseriousispollution?Learnaboutdifferentenvironmentalproblemsfromouruniversitystudents.Protectourenvironment! TheSearchforrenewableEnergyHall2﹣canwegetelectricityfromwindsolarenergywavesriversandundergroundheat?GettheanswersfromSolarAceTefronTouchWindResourcesandotherparticipants. TheQuestforFreshwaterHall3﹣istheshortageoffreshwaterworsening?WhatareSingapore'ssolutionsfortreatingwastewater?HearfromFlowTechnologiesHydroMaxSolutionsandotherparticipants. The3RsandSaveEarthHall4﹣HowcanweREDUCEREUSEandRECYCLEtocutdownhouseholdwastes?FindoutfromtheGlobalGalaNetworkGreenEarthFoundationandotherparticipants. FormoreinformationpleasecallMr.PhilipKohat65531188sendanemailtoMrs.DaisySohatdaisy_soh@ief.orgorvisittheeventswebathttp://www.ief.org/caw 1ThemainaimofEnvironmentAwarenessWeekisto. A.educatethepubliconprotectingtheenvironment B.discussglobalwarmingandotherenvironmentalproblems C.explainwaysforproducingfreshwatertosavetheenvironment D.learnaboutrenewableenergysourcesthatprotecttheenvironment 2Theorganizeroftheeventis. A.GlobalGaiaNetwork B.CleanEnergyAgency C.GreenEarthFoundation D.GlobalEnvironmentFund 3WhichofthefollowingstatementsisNOTtrueoftheevent? A.Itwilllastaweekandthehallswillbeopen11hoursaday. B.YoucansendanemailtoMrs.DaisySohformoreinformation. C.Eachhallchargesthesameamountofmoneyastheother. D.LecturesinHall1willbegivenbyuniversitystudents.

某碳酸钠样品中含有一定量的氯化钠．为测定其纯度取20g样品于烧杯中加入90g水搅拌形成不饱和溶液往溶液中滴加氯化钙溶液100g至恰好反应反应后过滤称得滤液的质量为200g． 1恰好反应产生的沉淀质量为g． 2求样品中碳酸钠的质量分数 3求反应后滤液中溶质的质量分数

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.作文中共有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:在错的词下划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. Thisismyfifthdayatthesummercamp.Lifeisn'texactwhatIexpected.WehavetogetupearlytomakeourbedsbeforeourteacherMissLicometoinspect.Afterbreakfastwehavesomeoffreetime.YesterdaymorningIwentfishingbuttheonlythingIcatchwasatreebranch.Intheafternoontherearedifferentactivitylikehorsebackridingandhiking.They'refunsonothingnewforme.Intheeveningeveryoneisassignedadifferenttasktogetdinnerready.YesterdayIwasinchargeofpreparethehotdogsbutIaccidentallydroppeditinthefire.Thebestpartofcampisatnightwherewesitaroundacampfireandtellstories.

细胞的物质运输功能与其膜结构密切相关下列叙述错误的是

如图它是由火柴棒拼成的图案如果在这个图案中用了51根火柴棒可拼成个三角形．

下列图象能正确反映其对应操作的是

在个体生长发育过程中引起细胞种类增加的是

863700000读作最高位上的数字是表示个7在位上．

下列实验操作现象的预测实验解释或结论都正确的是

我们学化学用化学爱化学让化学知识服务于人类．下列叙述正确的是

水与人类的生产生活息息相关下列有关水的说法正确的是

化学变化有时也是五彩斑斓的下列哪些反应不涉及颜色的变化

菠菜中含有草酸将草酸晶体隔绝空气加热使其完全分解生成水和碳的氧化物．为了探究上述反应生成的碳的氧化物成分同学们提出以下猜想． 1猜想与假设 猜想一只有CO猜想二只有CO2猜想三 2某同学设计了如图1所示实验验证猜想 ①无水草酸晶体熔点较低加热到182℃便开始熔化189.5℃分解．根据此信息你应选择的加热装置为图2中填A或B ②该装置中乙的作用为末端气球的作用为 ③实验中下列操作的先后顺序是 a．点燃加热装置中的酒精灯b．点燃丙处的酒精喷灯c．检查装置气密性d．装入药品 ④若甲试管和丁试管内溶液都变浑浊丙处玻璃管内的黑色固体变成红色则猜想正确．

玩具厂要生产200只玩具已经生产了60只用了3时．照这样计算完成这批玩具还要多少时

下列关于人体免疫的叙述正确的是

农作物的产量与光合作用的效率紧密相关科研人员尝试通过多种方式提高农作物的光合效率． 1在植物的叶肉细胞中存在着图1所示的代谢过程 在光照条件下CO2被固定成C3之后利用光反应产生的将其还原．研究发现RuBP羧化加氧酶还可催化C5与O2反应产生乙醇酸乙醇酸中75%的碳又重新生成CO2和C3的光呼吸过程．该过程降低了/促进了/不影响光合作用效率同时使细胞内O2/CO2的比值有利于生物适应高氧低碳的环境． 2根据对光呼吸机理的研究科研人员利用基因编辑手段设计了只在叶绿体中完成的光呼吸替代途径AP依然具有降解乙醇酸产生CO2的能力．同时利用RNA干扰技术降低叶绿体膜上乙醇酸转运蛋白的表达量进而降低从而影响光呼吸．检测三种不同类型植株的光合速率实验结果如图2所示．据此回答 ①当胞间CO2浓度较低时野生型植株与替代途径植株的光合速率相比． ②当胞间CO2浓度较高时三种类型植株光合速率的大小关系为．分析其原因是． 3基于上述研究请你提出一个可以进一步深入研究的问题．

Soyouwanttodrawmoneyfromabank?Doityourself.WanttofixtheInternetconnection?Doityourself.Needaboardingcardforyourflight?Doityourself.Intheorycompaniescansavemoneybyreplacinghumanworkerswithautomatedself﹣servicesystemswhilecustomersgainmorechoicesandgetquickerservice.Surelytheexpansionofself﹣serviceintomoreandmoreareasistobewelcomed? Notnecessarily.Whenitisdonewellself﹣servicecandogoodtobothcompaniesandcustomers.Butwhendonebadly﹣whohasnotfoundthemselvestrappedinaseriesofendlesstouch﹣tonemenus?Inareaswhereself﹣serviceisonlyjuststartedthisislessofaproblem:angrycustomerscanafterallalwaystaketheirbusinesselsewhere.Butifeverybankweretopreferself﹣servicesystemscustomerswouldnolongerbeabletoexpresstheirdiscountbyvotingwiththeirfeet.Asaresultsomebanksforexamplealreadypromisethattheirtelephone﹣bankingservicesalwaysofferthechoiceoftalkingtoahumanoperator.Butinreturnforhumanservicemanycompanieswillsimplychargemore. Anotherdisagreementtoself﹣serviceisthatwhileitsavescompaniesmoneyitdoesnotalwayssavetheircustomers'time.Inthebestcasesitdoesofcourse:checkingyourselfinattheairportcanbequickerthanqueuingormakingaphonecall.Butasmoreandmoretasksareontocustomerstheymaystarttohopeforthedaysofold﹣fashionedservice. Allofthissuggeststhattherearelimitstohowfarself﹣servicecanbetaken.Companiesthatgotoofardowntheself﹣servicerouteortodoitincorrectlyarelikelytofindthemselvesbeingpunished.Insteadabalancebetweenself﹣serviceandtraditionalformsofserviceisnecessary. 1Whatadvantagesdoestheself﹣servicetechnologycertainlybring? A.Cuttingthecostforthecompanies. B.Savingmoneyforcustomers. C.Offeringcustomersextramoney. D.Defeatingthetraditionalformsofservice. 2Whatdoesthewritermeanbysayingcustomerswouldnolongerbeabletoexpresstheirdiscountbyvotingwiththeirfeet? A.Customerswouldbesoangrythattheykickanddamagethemachineprovidingself﹣service. B.Customerswouldnotbeabletoexpresstheirangeratthebank'sservicebyleavingthere. C.Customerswouldtrytheirbesttopersuadethebanktostopself﹣service. D.Customerswouldelectsomeleaderstohaveatalkwiththebank. 3Fromthispassagewecanseethatthewritertheuseofself﹣service. A.dislikes B.supports C.thinkshighlyof D.makescarefuljudgmenton

2.5分下列物质中属于纯净物的是

从6时到9时时针按顺时针方向旋转了90°．判断对错

下列对有关实验操作或现象的描述中错误的是

长方形有条对称轴正方形有条对称轴等边三角形有条对称轴圆有条对称轴．

施用外源激素调控植物生长发育是农业生产中的一项重要措施多效唑是应用广泛的一种植物生长调节剂．研究小组探究不同浓度的多效唑对小麦植株内源激素和光合作用的影响实验过程及结果如表．下列推断不合理的是

溶酶体内含多种水解酶是细胞内消化的主要场所．溶酶体的内部为酸性环境pH≈5与细胞质基质pH≈7.2显著不同．以下有关叙述不正确的是

某北极冻原生态系统的部分食物网如图1所示该生态系统的能量流动情况如图2所示其中箭头表示能量流动方向箭头上方的数字为有关能量数值单位为×106J/cm2•a．请回答 1苔藓和地衣中的碳元素以形式传递到北极熊图1中北极兔驯鹿处于食物链的同一环节它们的总和称为． 2北极地区的动物在不同的季节一般都有换羽毛的习性它们的这种适应性特征是长期的结果．在全球变暖的趋势下北极熊的环境容纳量会增加下降基本不变． 3图中第一个营养级到第二个营养级的能量传递效率为D固定的能量除了图示的去向外还有．

化合物I是合成抗心律失常药普罗帕酮的前驱体其合成路线如图 已知CH3COCH3+CH3CHOCH3COCH＝CHCH3+H2O 回答下列问题 1A的名称．B的分子式为． 2A生成B的反应类型是C生成D的反应类型是． 3F的结构简式为H的结构简式为． 4化合物E中含有的两种官能团名称分别是写出一种同时符合下列条件的E的同分异构体的结构简式． ①能发生银镜反应和水解反应 ②核磁共振氢谱上显示4组峰 5参照上述合成路线以2﹣丙醇和苯甲醛为原料无机试剂任选设计制备的合成路线补出前面两步．

某实验室有两种酵母菌甲和乙在条件相同体积一定的培养液中单独培养种群数量増长都符合S型各自所能达到的环境容纳量为13个单位和5.8个单位．实验表明将甲乙混合培养时个甲所利用的资源相当于0.44个乙所利用的资源而一个乙所利用的资源相当于3.15个甲所利用的资源．请完成下列问题 1酵母菌在生态系统生物成分中属于．若单独培养母菌甲甲种群数量为单位个时种群数量增长速率最快． 2对上述培养液中酵母菌进行计数其实验操作是 ①先将静止放置的培养酵母菌的试管再取出1mL母菌液移人一只干净的试管 ②从1mL酵母菌液中取出少许滴在盖有盖玻片的上 ③将上述装片放在视野填较亮/较暗的显微镜下观察计数． 3若将甲乙混合培养两者的种间关系是．依据题中数据分析在生存斗争中取胜的一方是．

1在微生物作用的条件下NH4+经过两步反应被氧化成NO3﹣．两步反应的能量变化示意图如下 ①第一步反应是反应选填放热或吸热判断依据． ②1molNH4+aq全部氧化成NO3﹣aq的热化学方程式． 2近年来研究人员提出利用含硫物质热化学循环实现太阳能的转化与存储．过程如下 反应Ⅰ2H2SO4l＝2SO2g+2H2Og+O2g△H1＝+551kJ•mol﹣1 反应ⅢSs+O2g＝SO2g△H3＝﹣297kJ•mol﹣1 反应Ⅱ的热化学方程式． 3一定条件下不同量的CO2与不同量的NaOH充分反应放出的热量如下表所示 写出该条件下CO2与NaOH反应生成NaHCO3的热化学方程式．

Onceyouhavean______writtenplanthenexttrickistolearnhowtoworkiteffectively. A.solid B.abstract  C.intermediate D.temporary

甲乙两地相距175千米要画在比例尺是12500000的地图上应画厘米．

碘量法测定废水中的硫化物的实验装置如图．按图连接好装置检查气密性．移取足量的醋酸锌溶液于两支吸收管中取100mL水样于反应瓶中通入氮气一段时间移取10mL盐酸于反应瓶中80℃加热继续通入氮气．关闭氮气后往两个吸收管中各加入0.010mol•L﹣1的碘标准溶液50mL过量再加入盐酸3mL静置．加入淀粉指示液用0.010mol•L﹣1的硫代硫酸钠标准溶液对两支吸收管中的液体进行滴定共消耗80mLNa2S2O3溶液2S2O32﹣+I2═2I﹣+S4O62﹣． 已知废水中的硫化物酸性条件下易转化为剧毒硫化氢且醋酸锌可用于完全吸收硫化氢生成硫化锌沉淀．回答下列问题 1图反应器的名称是．通入氮气的目的是反应前反应后． 2实验室采用块状硫化亚铁与稀硫酸反应制取H2S下列发生装置中可选用的是填序号尾气处理使用硫酸铜溶液比氢氧化钠溶液效果好的原因是． 3反应瓶最佳采用加热填加热方式温度过高可能出现的后果是． 4加入碘标准溶液时吸收管中发生反应的化学方程式为． 5只使用一个吸收管可能导致测定结果偏填高或低． 6硫代硫酸钠标准溶液配制需要煮沸蒸馏水其目的是．0.010mol•L﹣1的硫代硫酸钠标准溶液不直接配制而是经过标定得到可能的原因是． 7废水中硫的含量为mg•L﹣1．

农业科学家将一个地区的品种与其他地区的品种杂交然后通过在两个地区间不断地反复交替穿梭种植选择鉴定最终选育出几种抗病高产的小麦新品种．下列叙述正确的是

2.5分下列做法中正确的是

Whileoverallratesofsuddeninfantdeathsyndromes综合征havedecreasedinrecentyearsdeathsfromsleepsuffocation窒息________overthesametimeperiod. A.double B.havebeendoubling  C.havedoubled D.doubled

阅读下面材料在空白处填入适当的内容1个单词或括号内单词的正确形式. ShanxinoodlesAmatterworthbeingproudof AcommonlyusedgreetinginChinaisthequestionHaveyoueaten?Itindicatesthe61importantoffoodinChina.TheChineseare62extremeproudoftheircuisine烹饪.ForexampleShanxitakesfulladvantage.Itisfamousforitsnoodles63makeofwheat.Ithasarecordedhistoryofmorethan2000yearsinmakingwheat﹣flournoodles. EverykindofnoodleimaginablecanbefoundinShanxi.EvenMarcoPolo64inspirebythemakingoftheShanxinoodleswhichledhimtotaketherecipesbacktoItalyandEurope.65mostpopularShanxinoodleisthedaoxiaomian.Thisnoodleisshavedfromagiantblockofdough面团hoistedoverthechef'sshoulder.Thenoodlesareshavedoffdirectlyintoboilingwater.Thereisaphrase66describesthenoodle﹣makingprocessOnenoodleinthe67boilwateroneflyingintheairandonejustbeingcut. Thenoodlesareusuallyservedinasmallbowlmixed68freshvegetables.AsaspecialrefinementyoucanputsomeShanxivinegarontop.Theextraagedvinegarisatypicalproductoftheregionaswell. OnecanfindhandmadenoodlesalloverChinatoday69Shanxiprovinceisspecial.It's70theartofnoodle﹣makingreacheditstop.

两个不同的自然数相乘所得的积一定是合数．．判断对错

近日在重庆服役51年的牛角沱嘉陵江大桥开始大修了这座跨越了半个多世纪的大桥是重庆主城首座城市大桥也是市级文物保护单位．其中大桥桥面部分的施工是大修工程的重点之一主要是进行行车道板改造．工程将拆除桥面现有的混凝土行车道板更换为钢桥面板．请回答下列有关问题 1钢桥面板的主要材料合金填是或不是选择该材料的原因是填字母序号． A．密度大B．硬度大C．导热性好 2桥梁外表面由于处于潮湿和酸性大气中容易腐蚀生锈．请写出用稀硫酸清洗铁锈的化学方程式． 3如果你是桥梁维护人员请说出一种防止钢铁生锈的方法．

OneafternoonI'dbeendrivingdownthefreewaywhenIspottedwhatlookedlikeastalled熄火的car.I41thatothercarshadslowedinordertobrieflylookatthestalledcar.Idecidedto42behindthecarandfindoutwhatwasgoingon.Suddenlyan43womanstepsoutandsheappearstobeinpain.IapproachedthewomanaskingifIcan44.ShesaidPleasecallmyhusband.Iamtryingtogettothe45.Iamabouttogivebirth!46asIwasIsaidWehaveno47forthat.Quick!GetinmycarandIwill48you. Itriedtodrivebothquicklyandsteadily49mypassengerwouldnotmovearoundalot.Ialsotriedofferinga50talkonthewaylikeEverything'sgoingtobeok.andWe'realmostthere.51wemetnoobstacleallthewayandarrivedatthehospitalinnotime.Itseemedabit52toanswerthestaff'squestionsabouthersincewe'djustmetafewminutesbeforeandIknew53aboutheroutsideofhername. 15minuteslaterher54cameoutofbreath.Uponseeingmehethankedmeandhandedmea$100bill.AtthatmomentI'd55theSMILEcardinmyglovebox.Iwalkedoutand56withittotheroomwherethewomanhadbeensettled.ItoldherthatithappenedthatIhadsomething57happentomewhenmysecondchildwasbornandwehadagoodlaughoverthe58. OnthewayoutI'daskeda59togivethecoupleanenvelopewiththeSMILEcard.Its60includedthe$100billwithanotethatreadBaby'scollegefund.Whew!Whataday. 41.A.expected B.noticed C.admitted D.knew 42.A.pullup B.pullin C.speedup D.joinin 43.A.lazy B.single C.injured D.pregnant 44.A.help B.stop C.leave D.pass 45.A.office B.car C.hospital D.store 46.A.Excited B.Puzzled C.Shocked D.Disappointed 47.A.excuse B.time C.need D.money 48.A.treat B.call C.send D.take 49.A.incase B.sothat C.evenif D.asthough 50.A.positive B.direct C.ridiculous D.negative 51.A.Naturally B.Undoubtedly C.Eventually D.Fortunately 52.A.complex B.vital C.difficult D.easy 53.A.nothing B.everything C.something D.anything 54.A.friend B.husband C.mother D.child 55.A.bought B.made C.forgotten D.remembered 56.A.posted B.designed C.returned D.brought 57.A.controversial B.crazy C.strange D.similar 58.A.child B.disaster C.story D.news 59.A.assistant B.nurse C.waitress D.policeman 60.A.objects B.projects C.themes D.contents

中东呼吸综合征__MERS﹣CoV可引起人体严重的呼吸系统症状甚至造成死亡．科研人员为研制针对MERS﹣CoV的特异性治疗药物进行了系列研究． 1MERS﹣CoV主要通过其表面囊膜的S蛋白与宿主细胞膜受体DPP4结合来感染宿主细胞．如图1所示S1与DPP4结合后导致S1和S2分离S2的顶端插入到宿主细胞膜上通过S2蛋白的改变从而将两个膜拉近发生膜融合过程．MERS﹣CoV进入宿主细胞后利用宿主细胞内的等为原料合成大分子物质组装成新的病毒扩散并侵染健康细胞． 2RBD是MERS﹣CoV的S1上与DPP4结合的部分．科研人员用从康复者体内筛选出的三种抗体甲乙丙进行实验研究它们与RBD的特异性结合能力．另用抗体丁作为对照抗体．实验流程如图2所示结果如图3．在实验过程中将作为抗原固定分别将加入反应体系然后加入酶标记的抗体能与待检抗体结合携带的酶可使底物反应显色其后加入底物显色检测相应的吸光值颜色越深吸光值越高．该实验中抗体丁可以作为对照抗体的理由是．实验结果表明． 3研究发现MERS﹣CoV在感染宿主细胞后有一种更快速的病毒传播方式．当被感染细胞表面的MERS﹣CoV囊膜蛋白与健康细胞表面的DPP4结合后膜发生融合实现MERS﹣CoV的转移．为了探究三种抗体能否抑制MERS﹣CoV在被感染细胞和健康细胞之间的传播科研人员展开研究．请在下表中的空白处填写相应处理内容完成实验方案．注鼠DPP4与人DPP4存在结构和序列上的差异 实验结果说明三种抗体中甲可以阻断病毒通过细胞融合的途径进行传播乙和丙效果不明显． 4科研人员进一步利用多种方法深入研究了三种抗体与RBD结合的区域实验结果表明甲与乙结合RBD上不同的区域甲与丙结合RBD的区域部分重叠．综合以上系列研究结果研究人员推测将两种抗体联合使用会具有更强的抗病毒能力．如果希望用联合抗体治疗中东呼吸综合征患者还需要进行哪些方面的研究写出一个方面即可．

某书店运来一批儿童读物第一天卖了这批读物的30%第二天卖了这批读物的36%比第一天多卖了30本．书店运来的这批儿童读物一共有多少本列方程解答

长方体中除了相对的面完全相同也有可能有两个相邻的面完全相同．判断对错

成都到重庆的实际距离大约为340千米在一幅比例尺为12000000的地图上量得的图上距离是厘米．

水是生命之源下列关于水的说法不正确的是

甲与乙的工作效率比是65两人合做一批零件共计880个乙比甲少做

微生物燃料电池的一种重要应用就是废水处理中实现碳氮联合转化为CO2和N2如图所示12为厌氧微生物电极3为阳离子交换膜4为好氧微生物反应器．下列有关叙述错误的是

一个立体图形从上面看到从左面看到．搭出这样的立体图形最少需要个正方体最多可以有个正方体．

在退耕还草后的15年里青藏高原的高寒干旱草甸发生从草本阶段到灌木阶段的演替．以下有关叙述正确的是

假定你是李华你校英文报心理与健康栏目拟刊登一篇文章为高三备考的学生如何安排课余生活和释放心理压力提出建议.请你为此栏目写一篇英语短文要点如下: 1.高三学习的挑战和困难 2.如何安排课余生活 3.如何释放心理压力 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯; 3.开头语已为你写好. LifeinSeniorThreeisnoteasy.

Smokingissoharmfultopersonalhealththatitkills______peopleeachyearthanautomobileaccidents. A.sevenmoretimes  B.seventimesmore  C.morethanseventimes  D.seventimesasmany

甲和乙为某二倍体动物2N＝8精巢内精细胞形成过程中的两个细胞两个细胞中染色体都在拉向两极且染色体染色单体和核DNA数目如表所示下列叙述正确的是

下面4个关系式中x和y成反比例关系的是

生物兴趣小组自制了泡菜对其中的微生物进行了筛选并对有害物质的含量进行了测定请回答相关问题 l泡菜制作过程中乳酸发酵的过程即为乳酸菌进行的过程．乳酸菌中含有多种蛋白质利用凝胶色谱法分离提取到的部分乳酸菌蛋白质时等样品完全进入凝胶层后加入pH为7.0浓度为20mmol/L的到适当高度进行洗脱结果先洗脱出来的是的蛋白质． 2兴趣小组还用伊红美蓝培养基检测泡菜汁中大肠杆菌的含量．从物理性质看该培养基属于液体/固体培养基伊红美蓝对大肠杆菌起到选择/鉴别作用．在某次计数操作过程中发现培养基上的菌落连成一片为避免此种现象发生正确的操作方法是． 3培养大肠杆菌时在接种前通常需要检测培养基是否被污染检测方法是． 4测定泡菜中NaNO2的含量依据的原理是在条件下亚硝酸盐与对氨基苯磺酸发生重氮化反应后与N﹣1﹣萘基乙二胺盐酸盐结合形成色染料．

氯碱工业是指用电解饱和NaCl溶液的方法来抽取NaOHCl2和H2并以它们为原料生产一系列化工产品电解饱和NaCl溶液的化学方程式为2NaCl+2H2OCl2↑+H2↑+2NaOH 请计算 1烧碱中三种元素的质量比为． 2用这种方法制备40t烧碱需要食盐的质量． 3若用25%的食盐溶液按照上述方法电解并制取40t烧碱完全电解后所得溶液的质量分数．假设生成的烧碱全溶计算时若除不尽保留1%

马边矿产资源丰富．已探明的矿藏有磷石膏煤铅锌铜铁等15种矿产．其中查明资源储量的有磷煤石膏石英砂岩石灰岩重晶石粘土铅锌铜铁等102余种．尤以磷矿最为丰富储量24.76亿吨．国家已将马边磷矿列入攀西﹣六盘水国土规划金沙江下游国土综合开发规划川南国土开发规划和马边河流域国土综合开发规划被四川省定为全省第二磷矿基地． 1在下列物质中既是煤的燃烧产物又会与空气中的水蒸汽形成酸雨的是 ①二氧化硫②粉尘③二氧化氮④臭氧⑤一氧化碳 2磷在氧气中燃烧发光放热产生大量的白烟．其白烟主要成分是五氧化二磷请写出五氧化二磷中磷元素的化合价为 3写出用一氧化碳和赤铁矿炼铁的化学方程式 4矿物的储量有限而且不能再生．防止金属的腐蚀是爱护金属资源的一种重要途径．实验室可用盐酸除铁锈其化学方程式为 5将一定量的金属锌放入盛有氯化铜和氯化亚铁的混合溶液烧杯中待反应后过滤得到滤渣和滤液往滤渣中滴加盐酸有气泡产生则滤液中一定不含溶质是

如图是某海域的大黄鱼种群数量与增长速率的关系曲线图ab点对应的死亡率相差不大下列叙述错误的是

计算 3m+5m＝ 8x﹣2x＝

兴农种子公司用350粒种子做发芽实验其中有50粒种子没有发芽．兴农种子公司这批种子的发芽率是

I'velearnedseveralforeignlanguagesasanadultandwasabletolearnFrenchtofluentconversationin17days. In2005IstayedwithaFrenchfriendinaFrenchvillage.NooneinthevillagespokeEnglishandmyfriendrefusedtospeakEnglishaswell. IsetuparoutinewhereIdidthesamethingseveryday. InthemorningIpracticedwritingvocabularyfor2hours.Ibelievewritingthingsoutisthebestwaytomemorizethings. WhilewritingIwouldlistentoFrenchlearningMP3s.It'sreallyhelpfultohearotherstudentsmakemistakesthatyoucanlearnfromjustlikearegularclassroomenvironment. IhadlunchwithmyFrenchfriendseveryday.AstheyrefusedtoslowdownwhenspeakingtomeinFrenchitwastolearnortostarve! IntheafternoonIreadCharlieandtheChocolateFactoryinFrench.Readingthechildren'sbooksyoureadasachildisagreatwaytolearnnewlanguages.Firstlythelanguageusedissimpleandsecondlyknowingthestoryhelpsyoutoguessthemeaningofnewwordsandavoidusingadictionary. IspentanhourwritingbasicessaysaboutthingsthatalwaysgetaskedlikeWhereareyoufrom?Whatdoyoudo?whichIhadmyFrenchfriendcheckforerrors.Bylearningready﹣madeanswersyoupracticewhatyoulearnedandbuildupyourconfidence. Anothergoodtipistolearnthefillerwordswhichpeoplesaybetweensentencesbuthavenorealmeaningallowingyoutobuytimeinconversation. After17daysIwenttoPariswhereImetagirlinacoffeeshop.WhenItoldherIhadbeenlearningFrenchfor17dayssheinsistedthatIhadlivedinFranceforatleastayear. 1Thewritermaycomefrom. A.France B.Germany C.China D.theUSA 2WhichofthefollowingisNOTwhatthewriterdoesinlearningFrench? A.ShewrotenewFrenchwordsonebyoneagainandagaineverymorning. B.ShewouldlistentoaFrenchteachingclassbyMP3whileshewaswriting. C.Shehadsupperwithherfriendseverydaypracticetalkingwiththem. D.Shewroteanswerstosomeusualquestionstobuildupherconfidence. 3Whatisthepurposeofthewritertowritethisessay? A.Totellpeoplethatshewasaverygoodlanguagelearner. B.Tosharewithpeoplesomemethodsoflearningalanguage. C.Tokeeparecordofherexperienceoflearningalanguage. D.Totellpeoplethatitwasnoteasytolearnanewlanguage.

在购买和使用化肥时要了解化肥的性质以便合理使用．为了给农民做技术指导大海同学利用自己掌握的知识对碳酸钾硫酸铵两种化肥的相关性质做了一下探究请将下列实验报告填写完整． 【实验记录与分析】 【结论与应用】碳酸钾和硫酸铵不能混合使用原因是碳酸钾溶液呈碱性与硫酸铵混合施用产生NH3降低肥效． 【知识拓展】鉴别失去标签的碳酸钾和硫酸铵固体请你用两种不同类别的试剂一次性鉴别它们．请写出所用的试剂．

下列实验操作中错误的是

Alexis17satquietlyinthepassengerseatofherdad'scar.Shelethereyeslazilyscanthelandscapeforwildlife.Thenadeercameintoviewabout200yardsinfrontofthem.Dadthere'sadeerthere!Alexissaid.Itwasamaledeerwithsharpantlers角oneachsideofitshead. AsthecarmovedcloserAlexissawthatthedeer'sheadwasbenttowardtheground.Thensheheardascreamandsawanarmflyupnearthedeer'shead.Alexisrealizedthedeerwasattackingawoman.Suea44﹣year﹣oldmotherhadbeenoutforhermorningrun.Thedeerfollowedherandedgedcloser.IknewIwasintroubleSuesays.Shewenttopickupastickforself﹣defenseandthedeercharged.Itliftedherwithitsantlersandthrewherintotheair.Suecouldfeelbloodflewdownherleg.Withinsecondsthedeerhadpushedherofftheroad. WhenAlexisandherfatherpulledupthedeerwasthrowingSuelikeadoll.Alexislookedintothewoman'sterrifiedeyesandbeforeherfatherhadevenstoppedthecartheteenagerjumpedquicklyoutofthecarandrantowardthedeer.Iwaskickingittogetitsattentionshesays.Thenherfatherwhohadfollowedhisdaughterpushedthedeerawayfromthewomen. AlexishelpedSueintothecarandthenappliedapieceofclothtoSue'sinjuredleg.We'regoingtogetyoutoahospitalAlexissaid.Thensheheardherfathershoutloudly.Hehadbeenknockedtotheground.Alexistookholdofahammerfromthecarandrantowhereherfatherlayonhisback.Shebeatthedeer'sheadandneckbuttheblowsdidn'tscareitaway.Iwaslosingfaithshesays.AcouplemorestrikesAlexissaidherfather.Youcandoit.TurningthehammeraroundAlexisclosedhereyesandbeatthedeer'sneckwithallherstrength.Whensheopenedhereyesthedeerwasrunningaway.Alexisgotinthedriver'sseatandspedtowardthenearesthospital. AfterSuewastreatedshetearfullythankedherrescuers.Youexpectateenagegirltogetonthephoneandcallforhelpshesaysnottobeatupadeer. 1WhatwasSuedoingwhenshewasattackedbythedeer? A.Shewasdrivinghome. B.Shewasrestingontheroad. C.Shewastakingexercise. D.Shewasfeedingwildanimals. 2WhatdidAlexisdotosaveSue? A.Shepushedthedeeraway. B.Shehitthedeerwithherfeet C.Shedrovethecartohitthedeer. D.Shebeatthedeerwithahammer. 3WhichofthefollowingwordscanbestdescribeAlexis? A.Strong. B.Cruel. C.Energetic. D.Brave. 4Whatisthebesttitleforthepassage? A.AWomanWasSeriouslyInjured B.ADangerousDeerAttackedaWoman C.AGirlRescuedHerFatherSuccessfully D.ATeenagerSavedOthersfromaDeerAttack

洋葱表皮细胞在0.3g/mL的蔗糖溶液中发生质壁分离时吸水力随质壁分离程度变化的曲线如图．下列叙述错误的是

下面百分率可能大于100%的是

Fordecadesarchaeologistshavewondered:Whoorwhatkilledthemostfamousboykinginhistory?Someexpertsthoughtthat19﹣year﹣oldTutankhamenhaddiedinahuntingaccident.Otherssaidthathewasmurderedbyablowofthehead. TwoyearsofDNAtestingandCTscansmayhavefinallysolvedthemysteryofTut'sdeath.Theteenpharaoh法老scientistsinEgyptnowbelievewasthevictimofmalaria疟疾complicatedbyabonedisorder. EvenathisbestKingTutwasnosymbolofstrength.HewasaweakboywhohadadeformedfootandwhoneededasticktowalkresearcherCarstenPuschtoldNationalGeographic. ShortlybeforeTutdiedinabout1324B.C.hemayhavebrokenhisleginafallthestudy'sauthorssay.Becauseofaweakimmunesystemthepharaoh'slegcouldn'thealandamalarialinfection感染finishedhimoff. Tutwasforgottensoonafterhisdeath.Sowhydoesheattractustoday?In1922anarchaeologistuncoveredagroupofroyaltombsinEgypt'sValleyoftheKings.Thieveshadstolenmostofthegraves. OnlyTut'swasuntouched.Egyptfeverswepttheglobeasworkersunloadedthedazzlingtreasureshiddenformorethan3200yearswhichhadbeenmeanttoaccompanytheyoungpharaohtotheafterlife.In1972Tut'streasuresbeganaseriesoftoursaroundtheworldgivingmillionsofpeopleachancetoviewhisgoldenburialmaskandotherrelicsupclose. ThroughitallTut'sstarwillcontinuetoburnbrightexpertssay.AsauthorJonManchipWhitewroteThePharaohwhoinlifewasoneoftheleastrespectedofEgypt'skingshasbecomeindeaththemostfamous. 1WhatprobablyledtoTutankhamen'sdeathaccordingtotheneweststudy? A.Ahuntingaccident. B.Aterriblemurder. C.Aninfectiousdisease. D.Ablowonhishead. 2Whichwordbestdescribestheboyking'sbody? A.Disabled. B.Over﹣weighted. C.Healthy. D.Strong. 3WhyhasthePharaohbecomesowell﹣knownafterhisdeath? A.Becausehediedattheageof19. B.Becausehisgravehadbeenstolenbythieves. C.Becausehewasoneoftherespectablekingsinlife. D.Becausetreasuresuncoveredinhistombattractedtheworld. 4Whichofthefollowingmayserveasthebesttitleforthetext? A.TheMostFamousPharaohinEgypt. B.TheCauseofTutankhamen'sDeath. C.AnIntroductiontoValleyoftheKings. D.TutankhamenCametoLifeafterDeath.

Joyce:Whatdoyouthinkoftheleadteacher'sspeech? Caroline:Ithinkitwas1interest. Joyce:2doI.IhearMikeislikelytowinalltheprizesintheexamsthisyear. Caroline:Yeshisteachersaysso.He3workhardathislessonseveryeveningformonths.HewanttogotoOxfordUniversitynextyear. Joyce:Ihopehewillrealizehisgoal. Caroline:Ihopeso.4Ithinkheworkstoohard.Ihopehe'llgooutandenjoy5forachange.HowaboutyoursonCarl? Joyce:Don'tmentionhim.Carlneverstartsstudying. Caroline:You'rejoking.IheardthatCarl6winthecompositionprize. Joyce:Youhavemade7mistake.ThatisWhiteCarl.MysonisBrownCarl.Thewhitesliveinthesamecommunity8wedo.WhiteCarlhasalwaysbeensohardworking.Hewantstobea9write.Mysonlikesgoingtotheconcert.Heonlylikessinging. Caroline:10hepracticessinginghewillbecomeasingerinthefuture. Joyce:Notallpeoplecanbecomeasinger.Idon'tthinkhehasthetalent.