如果|x-2y+1|+|x+y-5|=0,那么x=  ,y=  .

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答案:如果|x-2y+1|+|x+y-5|=0那么x=y=....
题目介绍: 如果|x-2y+1|+|x+y-5|=0那么x=y=., 本题为填空题收录于教案备课库题库中。
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  • 10分Youdon'thavetobeascientisttosolvebigenvironmentalproblems.OneDutchdesignerisfindingcreativewaystomakeachange﹣andhe'sinvitingbikerstojoinhim. DaanRoosgaarde38isadesignerfromHolland.Heusescreativeideastoimprovecitylife.ForhisSmog雾霾FreeProjecthedesignedaspecialtowerthatcleansairinChineseparks.InHollandhedesignedashiningbicyclepath. NowDaanandhisteamareworkingwithengineersatChinesebike﹣sharingcompanyOfotocreateanewproductforpublicuse.It'sanair﹣cleaningmachineconnectedtoabicycleandispartoftheSmogFreeProject.Insmoggyweatherthemachinewouldbreatheintheairinfrontofthebikeandblowoutastreamofcleanairtowardthebiker'sface. It'snosecretthatairpollutionisabigproblemforChina.Inwinterit'scommonforthickcloudsofhaze霾causedlargelybyfactoryproductionburningofcoalandcaremissions排放物tocoverareasofChina. In2016onlyone﹣fourthofChinesecitiesmetthecountry'sairqualitystandardsaccordingtoasurveyof338citiesnationwidefromtheMinistryofEnvironmentalProtection. Ofcourseonetowerandafewbikeswon'tsolveChina'sairpollutionproblemDaansaidButsmog﹣freebikesareanexcitingideathatwillhopefullyinspirecommunitiestocreategreenercities. 1Accordingtothewriter. A.airpollutionisnotabigprobleminChina B.creativeideasmayhelpimprovecitylife C.onlyscientistscansolvebigenvironmentalproblems D.thesurveyof338citiesnationwidewasnotnecessary 2Theair﹣cleaningmachineofferscleanairtothehikerby. A.blowingoutdirtyair B.runningfastwiththebike C.cleaningtheairaroundthebiker D.breathingindirtyairandcleaningit 3Fromthepassageweknowthat. A.peoplewhohavecreativeideascangetfreebikes B.onlysmog﹣freebikescangoontheshiningbicyclepath C.DaanandhisfamilyspentalltheirtimeimprovingChina'sairquality D.China'shazeinwinterhappensbecauseofmorethanthreecauses 4Daanisinvitingbikerstojoinhiminorderto. A.raisemoneyforthetower B.testhisnewmachine C.helpsolvetheairpollutionproblem D.makemoreChinesefriends 5Whatisthebesttitleforthepassage'? A.BreathingInandOut B.BikingforFreshAir C.SurveyfromtheGovernment D.China'sAirPollutionProblem
  • 如图抛物线y=﹣x2+bx+c与x轴交于A10B﹣30两点.1求该抛物线的解析式2在1中的抛物线上的第二象限内是否存在一点P使△PBC的面积最大若存在求出点P的坐标及△PBC的面积最大值若不存在请说明理由.
  • 1分﹣﹣﹣Mikeplaysthedrumssowonderfully! ﹣﹣﹣Ofcourse.Heisthananyotherstudentsinhisclass. A.talented B.moretalented  C.lesstalented D.themosttalented
  • 一个数和它的倒数成反比例.判断对错
  • 圆柱有条高并且每条高都相等圆锥有条高.
  • Theoldmanfortenyears.Hischildrenmisshimalot. A.hasdied B.hasbeendead C.died D.wasdead
  • 如图所示要使两灯泡串联应闭合开关.若S1S闭合S2断开则灯泡有电流通过.选填L1L2或L1和L2
  • 1分﹣﹣﹣Lookatthetallboyoverthere.He'swinneroftheschoolpaintingcompetition. ﹣﹣﹣Ohhemustbecreativeboy. A.Thea B.thean C.athe D.ana
  • 2分每个人天生具有学习的能力. Everyoneistheabilitytolearn.
  • 六年级一班的数学测验全班同学都达到合格具体统计如图在这次测验中全班的合格率是全班的优秀率是.
  • 1分﹣﹣﹣MayIhelpyouyounglady? ﹣﹣﹣. A.Goodforyou B.Welldone  C.Yesplease D.Takeiteasy
  • 如图所示图中有个小于90°的角.
  • 1分﹣Listen!IsSarahsingingintheneighbor'sroom? ﹣No.ItbeSarah.ShehasgonetoItaly. A.needn't B.maynot C.can't D.won't
  • 某种可口可乐罐的形状为圆柱形底面直径为8.5厘米高为10厘米.将18罐这种饮料按如图所示的方式放入箱内这个箱子的长宽高至少是多少
  • 1分﹣﹣﹣Doyoulikerockmusicorlightmusic? ﹣﹣﹣.Ilikepopmusic. A.Both B.None C.Neither D.Either
  • 某日小明步行小颖骑车他们同时从小颖家出发以各自的速度匀速到公园去小颖先到并停留了8分钟发现相机忘在了家里于是沿原路以同样的速度回家去取已知小明的步行速度为180米/分钟他们各自距离出发点的路程y与出发时间x之间的关系图象如图所示则当小明到达公园的时候小颖离家米.
  • 1分dayaiswhatbeautifulit!
  • 10分Nowstudents'Englishhandwriting书写getsworseandworse.Thatmakestheirteachersfeelworried.IsyourEnglishhandwritingbeautiful?1. Usepaperwithlines WhenyouwriteEnglishwordsorsentencesyoucanusepaperwithlines.Thatwillmakeyourhandwritingstraight.2Besuretofillthelinedspacecompletely.Andmakesurethesecapitalletters大写字母arewrittenproperly. Slowdown Ifyourwritingishardtoreadjustslowdownalittle.3Ifyouwritetooquicklyit'shardforyoutostopwhereyoushouldandyoumaymakemoremistakeseasily. 4. Whenyouholdyourpencilinthecorrectwaywritingismuchbetter.Somekidspressdownreallyhardwhentheywrite.Thatmakesthehandwritingbad.Trytoberelaxedanddon'tholdthepencilsohard.Letyourwritingappearniceandclean.Ifyoudosopeoplewillguessyouareastudentwithagoodhabit. Drawmorepictures 5Whileyouaredrawingpicturesyouneedtousetheskillstocontrol控制yourpencilbetter.Eventhoughyouhavenochancetodrawatschoolyoucanpracticebydrawingathome. Handwritingisveryimportant.Imagineyouareafamousmoviestarorawell﹣knownsportsplayerwhatdoyoudowhenyourfansrunuptoyou?Givethemyourautographs亲笔签名ofcourse!
  • 2分李老师已经把这位钢琴家介绍给学生们了. MissLihasthistothestudents.
  • —Comeandsee!Thebabyiscrying.—Pleasedosomethingtomakehim .A.stopcrying B.stoptocry C.crying D.cry
  • 计算x+6y2
  • 小明利用灯泡L1L2三个开关SS1S2一个电池组及导线若干组装电路按要求设计的电路图如图甲所示.1电路图中灯泡L1L2是的.选填串联或并联2根据已知电路图中电流的方向黑色箭头判断电源上端是填正或负极.3连接的实物电路如图乙所示请用笔画线代替导线将实物图中未连接好的导线补充完整.连线不许交叉4三个开关都闭合后只有灯泡L2发光则电路故障可能是L1为进一步确定故障原因小明将L1L2互换位置再次将开关都闭合后发现只有L1发光则可以确定故障是A.灯泡L1断路 B.灯泡L1短路 C.开关S1断路 D.开关S2断路
  • 黄豆的出油率为40%1800千克的黄豆可榨油多少千克要榨1800千克油需要多少千克的黄豆
  • 图a是一个长为2m宽为2n的长方形沿图中虚线用剪刀均分成四块小长方形然后按图b的形状拼成一个正方形.1你认为图b中的阴影部分的正方形的边长等于2请用两种不同的方法求图b中阴影部分的面积.方法1方法23观察图b你能写出下列三个代数式之间的等量关系吗代数式m+n2m-n2mn4根据3题中的等量关系解决如下问题若a+b=7ab=5则a-b2的值
  • 如图表示了某地区博物馆体育馆和图书馆之间的位置关系.根据这幅图下面描述中错误的是
  • 1分﹣﹣﹣Howdoyoucelebrate? ﹣﹣﹣Weusuallyeatzongziandwatchboatraces. A.theSpringFestival  B.theMid﹣AutumnFestival  C.theLanternFestival  D.theDragonBoatFestival
  • 下面圆的周长单位厘米是
  • Theairinthecountrysideissomanyofthepeopleliketogothereonweekends.
  • 如图平行四边形ABCD中A在坐标原点D在第一象限角平分线上又知AB=6AD=2求BCD的坐标.
  • 15分学校英语社团正在组织题为MyFamily的征文活动.假如你是李明请根据以下内容提示用英语完成征文. 内容要点如下 1.三口之家家庭幸福邻里和睦 2.父母为教师在校深受欢迎 3.分担家务周末户外活动 4.相互陪伴经常交流良好家规助我成长 5.请补充说明一至两点与家庭相关的情况. 注意 1.文中不得透露个人姓名和学校名称 2.词数60﹣80 3.内容连贯不要逐条翻译 4.标题和开头已给出不计入总词数. 参考词汇popularadj.受欢迎的activityn..活动rulen.规矩 MyFamily I'mLiMing.
  • 1分﹣﹣﹣Doyouloveyourparents? ﹣﹣﹣Yesofcourse.inmylifeismoreimportantthanthem. A.Something B.Anything C.Everything D.Nothing
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