如果|x-2y+1|+|x+y-5|=0,那么x= ,y= .

注意事项:
本内容均收集于互联网,版权等归原权属方所有,仅供网友学习交流,未经权属方书面授权,请勿作他用. 若发现本图侵犯了您的权益,请联系我们快速处理,感谢您对互联网分享方式的理解与配合。
相似内容
-
1分﹣﹣﹣Jackyouswamverywell.Whotaughtyou? ﹣﹣﹣Nobody.Itaught. A.I B.me C.myself D.mine
-
1分Ilikethissong.It'sbyoneofmyfavorite_. A.singers B.dancers C.painters D.writers
-
1分﹣﹣﹣WhynotaskBobtojoinusinthetriptothezootomorrow? ﹣﹣﹣Everyoneinourgrouplovesanimalsbuthealwaysseems. A.anxious B.personal C.cruel D.careless
-
isafestivalwhenpeopleusuallyeatmooncakesandadmirethemoon.A.TheDragonBoatFestival B.TheSpringFestivalC.TheLanternFestival D.TheMid-Autumnfestival
-
计算1-aa+1a2+1a4+1
-
ReadingEnglish everymorningisagoodwaytoimproveourspokenEnglishsowehaveEnglishmorningreadings.
-
用字母表示乘法的分配律.
-
HelosthissIDcard.
-
1分每个人都应该在环保方面发挥作用.play Evervoneshouldtheenvironmentalprotection.
-
We'lltrytodotheworkwithmoneyandpeople.A.less;less B.fewer;more C.more;fewer D.less;fewer
-
从化学的角度认识我们身边的物质往往有不同的发现.回答下列与空气相关的问题.一定条件下可将空气转化为液态该过程属于选填物理或化学变化
-
ChristmasfallsonDecember25.Familymembersgettogethertohavefunthatday. A.a B.an C.the D./
-
1分﹣﹣﹣Yournewbikeissonice!Whendidyoubuyit? ﹣﹣﹣InJuly.Iitfortwoweeks. A.had B.havehad C.havebought D.bought
-
在平面直角坐标系xOy中抛物线y=2x2+mx+n经过点A0-2B34.1求抛物线的表达式及对称轴2设点B关于原点的对称点为C点D是抛物线对称轴上一动点且点D纵坐标为t记抛物线在AB之间的部分为图象G包含AB两点.①画出图象G②若直线CD与图象G有公共点结合函数图象求点D纵坐标t的取值范围.
-
Excuseme.Couldyoutellmethewaytothemuseum?Themanaskedpolite.
-
-
1分﹣﹣﹣Trythissoupyoulikeit. ﹣﹣﹣Wow!Thisisdelicious! A.must B.will C.shall D.can
-
-
Inmyopinionthetolanguagelearningistopracticeasmuchaspossible.A.address B.secret C.course D.knowledge
-
下面有4组立体图形从左面看与其他3组不同的是
-
1分Kenwas_lateforschool.Thebellrangrightafterheenteredtheclassroom. A.still B.always C.already D.almost
-
1分﹣Jimmythebooksareeverywhereinyourstudy. ﹣SorryMom.I'llatonce. A.putthemon B.putthemaway C.putthemout D.putthemup
-
IthinkBobisasmartboy.Healwayshascreateideas.
-
8分SchoolActivitytheExerciseMonth AnumberofimportantschoolactivitiesarecomingupandthebiggestoneistheExerciseMonth. Whatisouraim目的? TheExerciseMonthisorganisedbytheYouthSportsClub.Themainaimofthisactivityistoimproveourschoolmembers'knowledgeabouttheimportanceofexercise. Whatareouractivities? TheExerciseMonthwilltakeplacefrom15Decemberto15January.Duringthismonthalotofactivitieswillbeheldtoshowtheimportanceofexercise. ●WritingCompetitionThetopicofthewritingcompetitionisExerciseandMe.Thelengthofthewritingis500wordsforthiscompetition. ●TalkThetalkwillbegivenon18December.ThespeakerwillbeDrChiufromStStephen'sHospital.Hewillthenanswerourmembers'questionaboutexercise. ●Exhibition展览Theexhibitionwillbeheldfrom19Decemberto3Januaryinourschoolhall.Thehistoryofdifferentkindsofexerciseandthewinningandexcellentwritingsfromthecompetitionwillbeonshow. ●After﹣schoolExerciseClassesTheafter﹣schoolexerciseclasseswillrunfrom18Decemberto14January.Intheseclassesexperiencedcoachesfromthelocalexerciseclubswillalsohelpourschoolmemberstomakepracticalexerciseplans. 1Whatisthepassagemainlyabout? A.Theaimoftheschoolactivities. B.Thedifferentkindsofschoolclasses. C.TheintroductionaboutExerciseMonth. D.Theschoolmembers'YouthSportsClub. 2Whatisthetopicofthewritingcompetition? A.ExerciseandMe. B.ASchoolActivity. C.PracticalExercisePlans. D.After﹣schoolClasses. 3Whenwilltheafter﹣schoolexerciseclassesstart? A.On15December. B.On18December. C.On14January. D.On15January. 4Whatcanwelearnfromthepassage? A.Thelocalexerciseclubhasalonghistory. B.DrChiuwilltrainthemembersafterschool. C.Thecoachingwillanswerthemembers'questions. D.Somewritingsfromthecompetitionwillbeonshow.
-
圆锥只有一个底面是一个圆锥的侧面是一个从圆锥顶点到的距离是圆锥的高.
-
1分﹣IamworriedaboutIcanenteragoodhighschoolornot. ﹣Takeiteasy.Believeinyourself! A.that B.when C.whether D.where
-
10分 1Ourhometownhasmanysoftandsweetmemoriesinourheart. 2Theyareseenassymbolsofhappinessandgoodwishes. 3Marydecidedtoforajobatanafter﹣schoolreadingprogramlastyear. 4Weusuallyplantodosomethingorgosomewheretogether. 5Althoughthestormbrokemanythingsapartitfamiliesandneighborsclosertogether.
-
mayhaveachancetobesuccessfulifhetrieshisbest.A. Somebody B. EverybodyC. Nobody D. None
-
1分﹣﹣﹣WhywereyoushoutingatTom? ﹣﹣﹣Itoldhimtobequietbuthetalking. A.joinedin B.endedup C.kepton D.putoff
-
—HurryupJohn!—?—Isaidhurryup! A.Pardon B.OK C.Thanks D.Allright
-
15分FouryearsagoJoelKlinegaveuphisjobasamagazineeditortobecomeafreelancecopywriterforadvertisementsbutnowhehadmoneytrouble.Hesaysthathewisheshe'dnever1tosetuphisownbusiness. IamnowinsuchabadsituationsaysJoelIhopeIam2workingasaneditor. YouseeIwas3withmyjobandIusedtogetreallyangryatmybossandthewayheusedto4mearoundallthetime.Italkedtoafewfriendsandtheysaidthattheycouldgiveme5soItoldmybosslwasleaving.Atfirsteverythingwas6IhadsomuchworkthatIhadtotakeonanassistant助理mybestfriendatworkDonjusttobe7tofinishthingsontime.Andsoonwe8largeamountsofmoney.DonandIhadareallygreatlifestyleandwhentheworkwasfinishedweusedtotakegood9inplaceslikeCancumandtheBahamsjusttogetrelaxed. Atfirstwewerebusyhavingfunandcharged支付everythingtomycreditcardsinsteadbutthenIbeganto10howmuchindebt负债Iwas.AtlastIhadto11Donoff.Ithenhadtosellallmyofficeequipment设备.NowIcoulddoalmostnothingevenifpeople12me.ThingsgotsobadthatIevenaskedmyoldbossifIcoulddosomeworkforthe13buthesaidthatI'dbeenso14tohimwhenIleftthathewouldneveremployer雇佣meagain.I'vehadto15mybusinessnowandIdon'tknowwhatI'mgoingtodoformoney.Itjustgoestoshowifyousetupyourownbusinessyoushouldn'tspendmoneyyoudon'thave. 1A.pretended B.learned C.failed D.decided 2A.specially B.still C.also D.certainly 3A.pleased B.strict C.bored D.patient 4A.show B.order C.serve D.lead 5A.time B.money C.food D.work 6A.perfect B.wrong C.hard D.fun 7A.afraid B.ready C.able D.about 8A.lost B.borrowed C.donated D.made 9A.vacations B.pictures C.courses D.chances 10A.imagine B.remember C.wonder D.realize 11A.lay B.see C.take D.put 12A.paid B.helped C.forgot D.asked 13A.advertisement B.magazine C.equipment D.lifestyle 14A.shy B.rude C.lazy D.straight 15A.closedown B.pickup C.turndown D.setup
-
当x=8时求100﹣8x的值=.
-
1分OnthefirstdayofChineseNewYearwenewclothesandvisitpeople. A.pickup B.puton C.takeoff D.throwaway
-
-
1分winIthegamebelievethey'll.
-
已知二次函数y=-2x2+4x+1且2≤x<4求y的取值范围.
-
实验室用的蒸馏水可以通过蒸馏自来水来制取.操作方法是在右图所示蒸馏烧瓶中加入约1/3体积的自来水再加入几粒沸石或碎瓷片.在确定各连接部位严密不漏气后加热蒸馏烧瓶注意不要使液体沸腾得太剧烈.弃去开始馏出的部分液体收集到10mL左右蒸馏水后停止加热.请回答下列问题1写出仪器AB的名称AB.2实验时冷凝管进出水的方向应该是b进a出不能a进b出的理由是.3细心观察发现该装置明显少了一种支撑冷凝管的仪器该仪器是.4实验中加入的沸石或碎瓷片催化剂填是或不是其作用是.
-
—WhatcolorcanIchoosemom?—It'stoyoubaby!
-
1分﹣The55﹣kilometerHZMB港珠澳大桥openedtothepubliconOct.24th.2018.' ﹣Itiscross﹣seabridgeinthewortdlinkingHongKongZhuhaiandMacao. A.long B.longer C.longest D.thelongest
-
在平面直角坐标系中已知点A2-a2a+3在第四象限1若点A到x轴的距离与到y轴的距离相等求a的值2若点A到x轴的距离小于到y轴的距离求a的取值范围
-
一个商场打折销售规定购买200元以下的商品不打折200元到500元的商品全部打九折如购买500元以上的商品就把500元以内含500元的打九折超出的打八折一个人买了两次商品分别用了134元和466元那么一次购买的话可以再节省多少元
-
一列火车从甲地开到乙地要4小时一辆汽车从甲地开到乙地要8小时问火车速度比汽车速度快百分之几正确的解答是
-
ZhangPengisaChinesedriverinXi'an西安.WhenhecheckedtheonlinewalletofhisWechatapp微信应用软件hesawthatoneofhispassenershadpaid6500yuanforA1pay.Thatmeantthepassengerpaidabout$950butinfactthepassengeronlyneededtopay$9.50.ZhangPengguessedthatthepaymentwasa2.Accordingtothetimeofthepaymentheguessedthatthefourforeigntravelersdidit.He3thefourtravelersfromthetrainstationanddroppedthemoffatanearby4.Whenhe5tocallthefourforeignpassengersZhangPengdirectlywenttothehotelagainwherehehaddroppedthemoff.Theninthehotelhe6whathadhappenedtothewaiteratthefrontdesk.Justatthattimethetraveler7madethepaymentcamedownstairs.Shewas8tohearabouthermistake.ItwasherfirsttimetovisittheChinesecityandshesaidthatitwasalsoherfirsttime9theapp'sonlinepaymentfunction在线付费功能topayfortheride.Shewas10moresurprisedwhenZhangPengrefusedtogetareward报酬and11herallherextra额外的money.12istruethatthetravelerhadawonderful13ofusingWechat.'Ican'tbelieveit'thewomantravelersaid.'14somepeoplemoneyistheironlydreamand$950isalotofmoney.Ifeltveryexcitedyesterday15thetaxidrivercamebacktoreturnthemoneyinperson.Iamreallygrateful.'1A.65yuan B.65-yuan C.65-yuans D.the65thyuan2A.mistake B.question C.fool D.praise3A.cheeredup B.putup C.pickedup D.lookedup4A.station B.hotel C.hospital D.restaurant5A.succeeded B.forgot C.regretted D.failed6A.explained B.asked C.understood D.suggested7A.whom B.who C.whose D.which8A.interested B.glad C.angry D.surprised9A.use B.using C.used D.touse10A.very B.even C.quite D.too11A.got B.returned C.cost D.spent12A.It B.That C.He D.This13A.trip B.examination C.experience D.vacation14A.As B.From C.At D.For15A.because B.becauseof C.evenif D.if
-
[-x4]3=.
-
如图在平面直角坐标系中以O为圆心适当长为半径画弧交x轴于点M交y轴于点N再分别以点MN为圆心大于MN的长为半径画弧两弧在第二象限内交于点Pab则a与b的数量关系为
-
在40206950这个数中位和位上的0不读.
-
计算a33÷a23
-
-
-
12分Johnwasdrivingthroughasmallcountrytownfeelingquitelostand1.Hewashappywhenhesawasmall2comingupontherightsideoftheroad.Johnquickly3hiscarandwalkedinsidetherestaurant. Johnsawablackboardwitha4writtenonit.ItsaidToday'sSpecial特价菜VegetableSoupwithFriedChickenandRoastPotatoes. Wowthatsoundsprettygood!Johnthoughtto5.Hedecidedthathewouldtrythisspecial. I'lltakethespecialJohnsaidtothewaiterwhenhecameoverto6John'sorder.ButafewminutesafterreceivinghisorderJohncalledthewaiter7tohistahle.Hewas8. Isthisthespecial?Itsaysvegetablesoupbutthereareno9inthissoupatall!Italsosaysfriedchickenbutthechickenisn't10.Anditsaysroastpotatoesbutthesepotatoesaren'ttoasted﹣they'vebeenboiled.Whatisgoingonhere? Thewaiterwasnotusedto11peoplefromthecity.Hewasn'tquitesurewhattosaytothisangrycustomer.Buthefinallyfoundawaytoanswertheman.MygoodmanthewaitersaidwhilelookingdownatJohnoverhisglassesthatisthereasonwhyitisso12! 1A.full B.lucky C.hungry D.proud 2A.shop B.restaurant C.hospital D.factory 3A.drove B.parked C.sold D.bought 4A.book B.dictionary C.diary D.note 5A.himself B.herself C.itself D.themselves 6A.put B.take C.bring D.cancel 7A.back B.on C.up D.away 8A.happy B.satisfied C.angry D.shy 9A.carrots B.tomatoes C.beans D.vegetables 10A.boiled B.cooked C.fried D.cut 11A.agreeingwith B.goingwith C.fightingwith D.dealingwith 12A.delicious B.special C.good D.perfect
-
10分Theyear2022willbeabigyearforsportsinChina.That'sbecauseitwillholdnotonlythe24thWinterOlympicsinBeijingbutalsothe19thAsianGamesinHangzhou. OnAug.6th2018theofficialemblem会徽fortheHangZhouAsianGameswasreleased发布.Thecitywonthehostingrightsforthe2022AsianGamesin2015.ItwillbethethirdChinesecitytohosttheAsianGamesafterBeijingandGuangzhouin1990and2010. Firstheldin1951theAsianGamesisthelargestmulti﹣sporteventinAsia.ItalsomeansalottoChina.TheBeijingAsianGameswasthefirstlargeinternationalsportseventtobehostedbyChina.ChinaNewsServicereported. TomaketheGamesagreatsuccessChinesepeopleworkedhardtoprepare.BeijingbuiltagreatnumberofroadsandgymsincludingthefamousBeijingOlympicSportsCenterandAsianGamesVillage.TheGameshelpedtheworldseeChinaanditsachievements.SincethenChinahasimproveditsglobalimage国际形象ChinaYouthDailyreported. Forthe2022AsianGames.Hangzhouhasalreadystartedbuilding33sportsvenues场馆accordingtoChinaYouthDaily.ThethemesoftheHangzhouAsianGamesaregreensmarteconomical节俭andcivilized.AlltheGames'sbuildingswillbeenvironmentallyfriendly. 1Whichcitywillhostthe2022AsianGames? A.Hangzhou. B.Guangzhou. C.Shanghai. D.Beijing. 2Whatdoestheunderlinedwordthemesmeaninthelastparagraph? A.意义 B.主题 C.内涵 D.标题 3AccordingtothepassagehowdidtheBeijingAsianGamesinfluenceChina? A.ItimprovedChina'seconomy经济. B.IthelpedChinaattractmoretourists. C.Guangzhoubuiltalotofroadsandgyms. D.IthelpedtheworldseeChinaanditsachievemems. 4WhichofthefollowingisNOTTRUEaccordingtothepassage? A.ThefirstAsianGameswasheldin1951. B.Beijingwillholdthe24thWinterOlympicsin2022. C.ChinahasalreadyhostedtheAsianGamesthreetimes. D.Allthe19thAsianGames'buildingswillbeenvironmentallyfriendly. 5Whatisthemainideaofthepassage? A.HowtopreparefortheAsianGames. B.ThedevelopmentoftheAsianGamesinChina. C.WhyChinawantstohostthe19thAsianGames. D.Howthe19thAsianGamesemblemwasdesigned.
-
Where'smyruler?It'sinyourpcase.
-
15分IwenttoschoolinChinaforfouryearsandforanothersixyearsinCanada.Therearetwoteachersfromthesecountriesthatreallyimpressedmeeventhoughtheyarevery1. WhenI2toCanadaIcouldn'tevenorderfoodontheflight.AftertwomonthsonanESLEnglishasaSecondLanguagecourseIgotmyfirst3card.MymarkinEnglishwas65.Iwasvery4.Icouldn't5whatwouldbesaidattheparent﹣teacherinterview. Hello!Mrs.Franceschiniwelcomedmyparents.RichardjustcametoCanadaafewmonthsago.IamamazedathowhisEnglishhas6sofastshesaid.Onhisfirstdayhewasveryshyandonlyused7words.Nowhecananswerandaskquestionsbyusinwholesentences. 8manyotherChineseparentsmymomaskedifshecouldgivemeextrahomework.Don'tworry.RichardisalreadyworkingveryhardMrs.Franceschinilaughed.Thensheshookmyhand.Richardyoudidagoodjob.Iam9ofyou!shesaid. BackinShanghaimyteacherMissLiwasvery10.Inatestmyaverage平均分was97topoftheclass.Iwasproudtotakeparents11theinterview. MissLitoldmyparentsFengYuisdoingprettywell.Butbecauseofhis12.helost3pointsinmath.Otherwisehewouldbethetopoftheschool. Ithoughtshewasbeing13tome.ButwhenIwasabouttoleaveIrealizedMissLiwasvernice.Shehostedapartyformeandgavemeabigcard.Herphonenumberande﹣mials'saddresswereonthecard.FengYuyouremybeststudent.I14youasucessfullifeshewrote.IfyouwanttotalkorneedanyhelpIamalwayshereforyou. MissLiandMrs.Franceschiniarebothgreatteachersjustindifferentways.Onebuiltupmylearningabilities.15gavemetonsofconfidenceandmadelearningenjoyable.I'mproudtohavehadthemasmyteachers. 1A.kind B.strict C.similar D.different 2A.moved B.arrived C.reached D.visited 3A.birthday B.green C.report D.ID 4A.satisfied B.upset C.curious D.careful 5A.imagine B.tell C.wonder D.doubt 6A.changed B.improved C.spoken D.increased 7A.long B.popular C.simple D.complete 8A.With B.Except C.Against D.Like 9A.proud B.certain C.afraid D.free 10A.patient B.strict C.friendly D.hard﹣working 11A.in B.off C.to D.up 12A.method B.action C.habit D.carelessness 13A.unfair B.nice C.crazy D.polite 14A.hope B.prepare C.offer D.wish 15A.Other B.Theother C.Another D.Theothers
-
从化学的角度认识我们身边的物质往往有不同的发现.回答下列与空气相关的问题.已知液氮沸点-196℃液氧沸点-183℃.将燃着的木条至于盛满液态空气的烧杯口观察到的现象是
-
2.4×92+2.4×8
-
电扇使用一段时间后扇叶很容易粘上灰尘这是因为扇叶转动过程中带上了具有的性质所以灰尘被吸在扇叶上.
-
如图1抛物线的顶点A的坐标为14抛物线与x轴相交于BC两点与y轴交于点E031求抛物线的表达式2已知点F0-3在抛物线的对称轴上是否存在一点G使得BG+FG最小如果存在求出点G的坐标如果不存在请说明理由.3如图2连接AB若点P是线段OE上的一动点过点P作线段AB的垂线分别与线段AB抛物线相交于点MN点MN都在抛物线对称轴的右侧求MN最大值
-
计算-a3b62--a2b43
-
如果A1-ab+1在第三象限那么点Bab在
-
按要求完成. A.张师傅要完成100个零件的加工任务他已经完成了全部任务的.他已经加工了多少个零件 B.一种零件的加工图纸的比例尺是41.这个零件在图纸上的长度是100毫米实际这个零件的长度是多少毫米 C.学校把养护100棵花苗的任务按照14分配给五年级和六年级同学.在这个任务中五年级同学要养护多少棵花苗 D.学校合唱队有100名队员其中男队员占.学校合唱队有男队员多少名 ①在解决上面四个实际问题时不能用100×来解决的是. ②你把上面不能用100×解决问题解答出来.
-
研究和学习化学有许多方法下列方法中所举示例正确的是
-
—What'sthatin?—It'sabaseball.
-
如图抛物线y=-x²+bx+c经过A06B42两点.1求抛物线的解析式2将抛物线向下平移m个单位使平移后得到的抛物线顶点落在△OAB的内部不包括△OAB的边界求m的取值范围.3若P是抛物线上一动点是否存在点P使△PAB的面积是10若存在直接写出P点坐标若不存在请说明理由.
-
nameisTony.isten.he
-
1分IlikeFridaybecausethenextdayisS.
-
在平面直角坐标系中一个点的横纵坐标都是整数并且它们的乘积是4满足这条件的点共有个
-
6分Manykidshelptheirparentswithchoressuchasdoingthedishescleaningthelivingroomandtakingouttherubbish.Andsomdkidsgetmoneyorotherrewards奖赏suchasmorecomputertimebydoingchores. Butsomepeopledonotthinkthatkidsshouldgetrewardsbydoingchores.SusieWalton.anexpertbelievesthatbyrewardingkidsparentsaresendingamessagethatworkisn'timportantunlessyoucangetsomething.RunninganykindoffamilyisateamworkWaltonsays.Ahomeisalivingplaceforeveryoneinthefamily.It'simportantforkidstoseethatweallhaveresponsibilitiesinthehouse. Otherpeoplebelievethatgettingmoneyorotherrewardsmakeskidsdochoreshappilyanditalsoteachesthemrealworldlessonsaboutwhatweneedtodotomakemoney.Therearealsonowapps应用软件.WiththeChore﹣Monsterappkidscangetpointsandonlinegiftsbydoingchores.Kidscanchangethemintorealliferewardseitheronlineorintherealworld.Wehopekidscandomorechoressotheycangetmorerewardsonemansays. Whatdoyouthink?Shouldkidsgetrewardsfordoingchores?Orshouldkidshelpdochoreswithoutgettinganything? Writea200﹣wordreplyandsendittous.ThelastdayforreplyisApril10th.Ifyouwanttoreadmoreideasabouttopicyoucanclickhere. 1SusieWaltonagreesthat. A.kidsshoulddomorechoresthanparents B.Parentsshouldmaketheirkidsdomorechores C.Kidsshouldn'tgetrewardsbydoingchores. D.Kidsshoulddochoresasyoungaspossible 2HowdoestheChore﹣Monsterapphelpparents? A.Bymakingkidslikedoingchores. B.Bytellingparentsgoodways. C.Byteachingkidstodochores. D.Bytellingparentshowtochange. 3Youcansendyourreplyon. A.March23rd B.April18th C.May28th D.June24th
-
已知点M32与点Nxy在同一条平行于y轴的直线上且点N到x轴的距离为8则点N的坐标为
-
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
你可能感兴趣的试题
- What's尺? A.inEnglish B.inChinese C.isit D.it's
- 解方程. 3x﹣12=39 5﹣x=4
- 下面几组相关联的量中成正比例的是
- 1分﹣﹣﹣Dadwhatistheloudspeakersaying? ﹣﹣﹣Itistothe.TheflighttoWuhanisboardingnow. A.customers B.passengers C.members D.tourists
- 若x3=-27a6b12则x=.
- 1分She'sbroughtyousomeeggs.Asyouknowshechickens. A.keeps B.willkeep C.haskept D.kept
- 如图若以解放公园为原点建立平面直角坐标系则博物馆的坐标为
- —Isthatyourbackpack?—Noit.
- 以梦为马驰骋流年某中学初2019级迎来了期盼已久的拾光影六一晚会.当天张老师为带着儿子前去观看这次晚会首先自己以某一速度开车从家出发到儿子学校大门口等待儿子放学上车儿子上车后张老师担心堵车耽误时间于是就加快了车速赶到校区如图所示的四个图象中S为离家的路程t为时间符合以上情况的是
- 如图是一块梯形菜地.计算这块菜地面积的正确列式是.
- 在北方的冬天人们常利用暖气取暖这是用的方法使人体的内能
- 如图AD∥BC∠ABC的角平分线BP与∠BAD的角平分线AP相交于点P作PE⊥AB于点E.若PE=2则两平行线AD与BC间的距离为.
- 如图中呈现的是一瓶已经喝了一些的果汁和一只圆锥形玻璃杯.图中h=h1d=d1.如果把瓶中的果汁倒入这个锥形玻璃杯最多可以倒满杯.容器壁厚忽略不计
- 今年是国际化学元素周期表年以纪念化学家门捷列夫在1869年发明第一张元素周期表150年.下图1是元素周期表中第三周期元素的原子结构示意图图2是几种粒子结构示意图.1为纪念门捷列夫科学家将一种由人工核反应获得的新元素命名为钔Md.已知某钔原子核电荷数为101中子数157则该原子相对原子质量约为①在化学反应中钔原子失去3个电子后形成离子该离子符号为②2图1中元素钠元素镁元素属于不同种元素的根本原因是不同3图2中与氯原子化学性质相似的是填序号4图2中属于阴离子的是填序号.
- 按要求在方格纸中作图. ①在如图方格纸中画出以A311B19C49D611为顶点的平行四边形. ②在如图方格纸中画出一个与平行四边形ABCD面积相等的三角形.
- 一个长方形的长是5厘米宽是3厘米它的周长是厘米它的面积是平方厘米.
- 计算16÷-23--1+1.3-10
- 在如图所示的阴影区域内的点可能是
- 已知一个等腰三角形两内角的度数之比为14则这个等腰三角形顶角的度数为.
- 在下面的选项中不能用等号连接的一组算式是
- LindaisthewinoftheEnglishspeechcontest.
- 人工智能ArtificialIniedligence英文缩写为AI.它是研究开发用于模拟延伸和扩展人的智能的理论方法技术及应用系统的一门新的技术科学.如图是2018年我国人工智能企业领域分布情况统计图. ①这三位同学的叙述中你不认同的是填写姓名. ②现在是2019年你觉得今年我国人工智能企业将在哪个领域的发展最快请说明你的理由.
- 某兴趣小组对实验室制取氧气进行探究.1实验过程中要量取20mL过氧化氢溶液应选择的仪器有2实验室中利用氯酸钾制氧气的文字表达式为某同学发现氯酸钾与氧化铜混合加热也能较快产生氧气于是进行如下探究【提出猜想】除二氧化锰外与氧化铜氧化铁也可以做氯酸钾分解的催化剂.【完成实验】按下表进行实验测定分解所需温度分解所需温度越低分解速率越快.【得出结论】①由组填序号实验对比可以得出氧化铁可以加快氯酸钾分解的结论②三种物质中加快氯酸钾分解速率效果最好的是【反思评价】若要证明氧化铜氧化铁可以做该反应的催化剂还需要证明在反应前后其不变.
- 一瓶沐浴露的净含量约是200毫升.判断对错
- —WhichbookisPaul's?Isthisone? A.mine B.hers C.yours D.his
- 10分LiShizhen李时珍wasoneofthemostfamousdoctorsinChinesehistory.HewasborninQichunHubeiin1518. BothofLiShizhen'sfatherandgrandfatherweredoctors.LiShizhen'sgrandfatherwasacountrydoctorwhotraveledinthecountrysidewithabagofherbs药草andmedicationsandcured治愈people.Hisfatherwasdoctorwhowroteseveralbooks. LiShizhenusedtohelphisfatherinhismedicalpracticewhenhewasyoung.LiShizhen'sfatherwantedhimtoenterpolitics从政.LiShizhenstudiedfortheexamsandpassedthecountry﹣levelexaminationbuthewasneverabletopasstheimperial帝国的examination. Whenhewas38hecuredthesonofthePrinceofChuandwasinvitedtobeanofficialinthatcourt宫廷AfewyearslaterhebecameanofficialattheImperialMedicalInstitute. Eventhoughhefulfilledhisfather'sdreamhedidn'twanttocontinueworkingforthecourt.Oneyearlaterheleftthecourtandreturnedtobeadoctoragain. LiShizhen.wasfamousforhisbookCompendiumofMateriaMedica本草纲日.Hespent27yearswritingthebook.UnluckilyLiShizhendiedbeforethebookwasofficiallypublished.Itissuchasuccessfulbook.NowitisstilloneofthemostimportantmedicalbooksinChina. 1WhatwasLiShizhe'sgrandfather? A.Anofficial. B.Aprince. C.Acountrydoctor. D.Awriter. 2WhatdidLiShizhen'sfatherwantLiShizhentodo? A.Tobeadoctor. B.Towriteabook. C.Tobeaprince. D.Toenterpolitics. 3Whenhewas38LiShizhencured. A.hisgrandfather B.thesonofthePrinceofChu C.anofficialinthatcountry D.afamousdoctor 4AccordingtothepassagewhatwasLiShizhenfamousfor? A.Workingforthecourt. B.ThebookCompendiumofMateriaMedica. C.Hislongtraveling. D.Curingalotofpeople. 5Whatdoesthepassagemainlytalkabout? A.LiShizhen'slife. B.LiShizhen'sgrandfather'slife. C.LiShizhen'sfather'slife. D.LiShizhen'sbook.
- 1分昨天上午暴风雨来临时我们正在打扫城市公园.clean Whentherainstormcameyesterdaywethecitypark.
- 金星和太阳的距离大约是108450000千米横线上的数读作改写成以万作单位的数是万.
- Itisvery forKellytogotothesupermarketbecauseherhouseisonlyafewminutes'walkfromit.
- 下列物体是由哪些图形组成的
- 跳绳时绳甩到最高处时的形状是抛物线.正在甩绳的甲乙两名同学拿绳的手间距AB为6米到地面的距离AO和BD均为0.9米身高为1.4米的小丽站在距点O的水平距离为1米的点F处绳子甩到最高处时刚好通过她的头顶点E.以点O为原点建立如图所示的平面直角坐标系设此抛物线的解析式为y=ax2+bx+0.9.1如果小华站在OD之间且离点O的距离为3米当绳子甩到最高处时刚好通过他的头顶请你算出小华的身高2如果身高为1.4米的小丽站在OD之间且离点O的距离为t米绳子甩到最高处时超过她的头顶请结合图象直接写出t的取值范围.
- 1分TheHighSpeedRailisamazing.Itmakestravel. A.easier B.harder C.higher D.slower
- 在平面直角坐标系中点O是坐标原点若点P的坐标是68则PO=A.16 B.12 C.10 D.8
- MrLeehasnamecallandbirthdayonhisownIDcard. A.her B.its C.his D.my
- 在探究串联电路的电流规律时小敏同学连成了如图所示的电路. 1在连接电路时开关应 2请在电路图中标出电流表的正负接线柱分别用+-表示. 3检查电路无误后闭合开关三灯L1L2L3均发光接着她应用电流表分别测量abcd处的电流她记录了表1中的实验数据由表1中的实验数据可知实验中多次测量的目的是 4小刚同学也做了此实验.记录的数据如表2所示从表2中可以看出d处的电流比abc处的电流大许多出现这种情况的原因可能是 表1 表2
- isinterestedinchesscanjoindiechessclub. A.Anyone B.Theone C.He D.Whoever
- 某滑动变阻器铭牌上标有10Ω1.5A其中10Ω表示1.5A表示.
- 化学是一门以实验为基础的科学实验安全与规范至关重要.回答下列与加热操作相关的问题.加热后熄灭酒精灯正确操作是用盖灭.
- Thisisoneoffilmsofthisyear.A.moreexciting B.excitingC.themostexciting D.mostexciting
- alotforhelpingme.thank
- 在平面直角坐标系xOy中点Pab的变换点Q的坐标规定如下当a≥b时Q点坐标为b-a当a<b时Q点坐标为a-b.1求-236-1的变换点坐标2已知直线l与x轴交于点A40与y轴交于点B02.若直线l上所有点的变换点组成一个新的图形记作图形W请画出图形W3若直线y=kx-1k≠0与2中图形W有两个交点请直接写出k的取值范围.4选作若抛物线y=-x2+c与2中图形W有三个交点请直接写出c的取值范围.
- 计算-102×-100+10-2×100
- 计算1-2x-3x+2
- 如图AB∥CD∠B=∠C=90°点M为BC中点AM平分∠BAD.求证AM⊥DM.
- 某机械加工车间完成了一批同规格零件的加工工作.这种零件的标准外直径是585mm.质检部门在抽检这批零件时为了记录每个抽检零件外直径与标准的误差把1号零件外直径记作+2mm那么2号零件外直径记作
- Heshowedagreat formusicwhenhewasyoung.Nowheisamusician.
- A Comeandlookatthepicture.ItisapictureofanAmericanfamily.ThemaninthehatisMrJohnWhite.Heisateacher.HeteachesEnglishinamiddleschoolinChina.YoucanseeMrsWhitetoo.SheisDoraWhite.She’sfromCanada.She’sadoctor.Mr.andMrsWhitehavetwochildrenMaryandMike.MikeistenandMaryisseven.Theylovethemverymuch. 根据短文内容判断正T误F 1.Mike'sfatherinthepictureisinthehat. 2.Mary'sfatherisCanadianandherMotherisAmerican. 3.MrsWhiteisateachertoo. 4.MikeMaryandtheirfatherandmotherareinEngland. 5.MaryiseightandMikeisten.
- 在平面直角坐标系中点3-2关于原点对称的点是
- 在国际单位制中电压的单位是
- 2分你是否想到每一次你享用一碗鱼翅羹时你是在宰杀一整条鲨鱼呢? Doyourealizethatyouareawholesharkeachtimeyouenjoyaofsharkfinsoup?
- 1分2019年亚洲文明对话大会上个月在北京举行.take AsianDialogueConference2019inBeijinglaslmonth.
- 1分It'sarelaxingand/'pisfl/placenearalake.
- 若点Ma-22a+3是y轴上的点则a的值是
- 北京是中国的政治文化国际交往.科技创新中心.它的面积约为一万六千四百一十平方千米.横线上的数写作平方千米.改写成以万为单位的数是万平方千米.
- Thatispen.I
- 1分熬夜是一个坏习惯.stay isabadhabit.
- 6分YourEnglishteacherhasintroducedaplaytoyourclass.Readtheplay. CharactersBennystudent14yearsold Peterstudents15yearsold Susiestudent14yearsold Gracestudent14yearsold TimeOneSundayafternooninautumn PlaceSunnyPark Thefourteenagershavejustfinishedthepicnic.Theyaretidyingup. BennyWow!Thatwasagreatpicnic.I'msofullthatIcanhardlymove. GraceThat'snoexcusefornottidyingupBenny.Comeoverhereandhelpmepackuptheleftoverfood.Petercanyouputoutthefireplease?Andcleanuptheplate. PeterSpeakingunhappilytohimselfHowcanIalwaysgetthedirtyanddifficultjobs? It'snotfair. Peterthrowsabitofwateronthefire.Thenhepicksuptheashes灰烬withanoldnewspaperandwantstothrowthemintothelonggrass. SusieSoundingsurprisedWhatareyoudoingPeter?That'sd PeterWhoopsthenewspaperhascaughtfire. SusieAndthegrassBennyGracehelp!Help! BennyandGracecomeoverquickly.Theyhelpputoutthefirecompletely. PeterOhno.WhathaveIdone? GraceYouknowthatweshoulddoeverythingcarefullydon'tyou? PeterWithhisheadinhishandsYes.WhathaveIdone?WhathaveIdone? 1HowdoesPeterfeelabouthisjob? A.Cleananeasy B.Dirtyanddifficult C.Greatandinteresting D.Noisyandharmful 2WhatworddoyouthinkSusiewouldsayinthesentenceThat'sd? A.dirty B.difficult C.delicious D.dangerous 3Whichofthefollowingsentencesistrue? A.Therearefivepeopleintheplay. B.Peter'scarelessnesscausesthefire. C.Theyhaveapicnicinthemorning D.Bennyrefusestohelpotherstidyup.
- 1分HemehisnamebutIcan'trememberitnow. A.tells B.willtell C.told D.istelling
- 1.6÷0.75﹣0.5
- 下列说法错误的是
- 质量相同的铁和铜吸收了相同的热量后温度升高的多若让它们降低相同的温度放出的热量多.c铁>c铜
- Criticalthinking批判性思维istryingtoimprovethewayyouthink.Peopleusecriticalthinkingineveryareaoflifetosolveproblemsandevaluateclaims评估主张.Likeeveryotherskillcriticalthinkingtakespractice.Whenaproblemcomesourwayweneedtothinkcriticallytodecidehowtosolveit.Whenweseeanadvertisementforexampleweshouldstopandthink.Advertisementsaremadetomakepeoplefeelcertainthattheyaretrueandthenpeoplecanbuytheproducts.Butiswhattheadvertisementsaystrue?Isitmakingaclaim?Ordoesitonlyinterestus?Criticalthinkingisimportantandstopsusfrommakingpoorchoices.Infactweareusingitifweaskquestionsnaturallyaboutwhatwesee.Practicemakesperfect.Whileyouaregrowingincriticalthinkingyou'llbecomeawiserandmorethoughtfulperson.Therearemanywaysofdoingpractice.Hereareafew.★Readaboutatopicpeopledisagreeon.Lookatarticlesorbooksonallsidesofthesubject.Foreachsideofthesubjectthinkcarefullyandevaluateit.★Whenyouseeorhearaclaimaskquestionsaboutit.Whoismakingtheclaimandwhy?★Evaluateyourownthinking.Whereandwhydoyouthinkuncritically?Howcanyouimprove?Criticalthinkingshouldbepartofeverythingwedo.Itmayhelpyoutosucceedatworkorschool.Makeyourselfintoahabitofcriticalthinking.Changeyourthoughtsandchangeyourworld.66.67题完成句子68题简略回答问题69题找出并写下第二段的主题句70题将文中画线句子译成汉语.66.Peopleusecriticalthinkingtoandevaluateclaims.67.Criticalthinkingcanstopusfrom.68.Whatkindofpersonwillyoubecomeasyougrowincriticalthinking?69.70.
- 1分﹣Creativemorningarepopularinourschool. ﹣YeswedancetofunmusicsuchasthesongCalorie卡路里. A.exams B.exercises C.examples D.expressions
- 1分cupiswheremy?
- 1分﹣﹣﹣TomorrowisFather'sDay.What'syoursurpriseforyourfather? ﹣﹣﹣ThefirstthingIwilldoistomakeacardforhim. A.who B.where C.whose D.that
- 如图1抛物线顶点坐标为点C14交x轴于点A30交y轴于点B.1求抛物线和直线AB的解析式2连结CACB对称轴x=1与线段AB交于点D求△CAB的铅垂高CD及S△CAB3如图2点P是抛物线在第一象限内上的一个动点连结PAPB是否存在一点P使S△PAB=S△CAB若存在求出P点的坐标若不存在请说明理由.
- Tinaisborntheabilitytodance.Sheisatalenteddancer.
- 一个等腰三角形它的顶角是两个底角的和.这个三角形又是三角形.
- —Isthisbook? —Yesit'sEnglishbook. A.a;a B.a;an C.an;an D.an;a
- 1分﹣﹣﹣WhereisCatherine?Ihaven'tseenherfordays. ﹣﹣﹣SheWuhan.She'llbebacknextweek. A.hasgoneto B.hasbeento C.havegoneto D.havebeento
- 下图是初中教材中的几个实验.回答下列问题.1实验一中发生反应的文字表达式为①若各步操作完全正确打开止水夹后可以观察到烧杯中水进入集气瓶进水量②2实验二中应将木炭由上至下伸入集气瓶以充分利用氧气3实验三中硫在空气中燃烧与在氧气中燃烧现象不同原因是4实验四中待火柴①时伸入集气瓶集气瓶中水的作用是②
- =
- 如图所示用打气筒向装有少量水的瓶里打气当瓶塞从瓶口跳出时看到瓶中出现了白雾.根据这一现象回答下列问题.1塞子被推出的过程中能转化为能.2该实验说明可以改变物体的内能.
- 10分HereisafamousstoryabouttheGreatWallofChina.ThestoryhappenedintheQinDynasty.1Doyouwanttoknowmoreaboutthelovestory? OnedaytheemperorQinShiHuangorderedhissoldiers士兵tocapture俘虏someyoungmen.HesenttheyoungmentobuildtheGreatWallofChina. AyoungmannamedFanXiliangdidn'twanttogetcaptured.2Hehadnowheretogoanddidn'tknowwheretohide.Whenheheardthesoldierscomingtowardshimhewasterrified. AtthattimeawomannamedLadyMengJiangwaspassingbyFanXiliang.Shesawthepoormanandsavedhim.FanXiliangsaidthankstoLadyMengJiang.3Laterontheygotmarried. UnfortunatelyFanXiliangwasfoundandcaptured.HewassenttotheGreatWallandworkedthere. LadyMengJiangwaitedforherhusbanddayandnight.WintercamebutFanXiliangfailedtoreturn.4ShetookthewarmclothestotheGreatWallbutshedidn'tfindFanXiliang. SomeonetoldherthatFanXilianghaddiedandthathewasburiedintheGreatWall.5 ShecriedsosadlythatapartoftheGreatWallcollapsed倒塌andshefinallyfoundFanXiliang'sbody.
- 10分ConfuciusisthegreatestteacherinChinesehistory.Hewasbornon1S28th.511B.C.intheKingdomofLu.intoday'sShandongProvince.Whenhewasyoungheandhismotherhadahard2l.Attheageoffifteenhebegantolearnmusicandhedidwellinit. Thenhewenton3lothersubjects.Whenhewasthirtyhe4bateacher.Hestartedhisownschool.Hebelievedeveryoneshouldhaveachancetogeteducationwhethertheywere5rorpoor.Hehadabout30006sandmanyofthembecamefamous. ChineseseeConfuciusasthegreatestthinker7whadmanywiseideasabouthumannatureandbehavior.Andheisalsoregarded8athegreatestteacher.Hismostimportantideasareaboutkindnessand9gmanners.Hesaidyoungpeopleshould10tcareoftheold.Peopleshouldnotonlyalwaysthinkofthemselvesbutworkfor11o.Hisideasarearoundinpeople'severydaylife.Todaypeoplecanstillheartheideasandtheyevengofarintoeast12asouthAsia.
- 1分﹣﹣﹣WhatdoyouthinkofthenewmovieWanderingEarth流浪地球? ﹣﹣﹣It's____wonderfulIreallylikeit. A.sothat B.suchthat C.tooto D.enoughto
- 15分茶是中国传统饮食文化的组成部分是生活中不可或缺的饮品.作为中学生我们应了解茶并传播茶文化.请根据以下要点提示写一篇英语短文. 要点提示1.历史悠久约5000年前神农首次发现茶可以饮用 2.种植广泛安溪和杭州尤以茶闻名 3.喝茶有很多好处有利健康醒脑提神等 4.世界各地许多人喜欢喝茶并收集茶具. 写作要求1.文章必须包括所有内容要点可适当发挥以使行文连贯 2.词数80词左右文章的开头已给出不计入总词数 3.文中不得出现真实姓名及校名. Chinaisfamousfortea.
- 1分HehisEnglishteacherwhenhewassightseeinginParis. A.hasmet B.hadmet C.met D.wouldmeet
- Isthatyourbookthelostandfoundcase?
- 基本事实若am=ana>0且a≠1mn是正整数则m=n则利用此基本事实求出2×8x=27中x的值为A.3 B.2 C.6 D.1
- 在平面直角坐标系中点A的坐标为13线段AB∥x轴且AB=4则点B的坐标为
- 一个圆柱形油桶底面直径6dm高12dm.做这个油桶至少需要多少平方分米铁皮如果每升汽油的质量是0.8k这个油桶共能装汽油多少千克
- 保持氯化钠化学性质的最小粒子是.
- —Imywatch.—Look!Isthisyourwatch?lose
- 学校三月份共植树500棵有20棵没有成活成活率是%.
- 如图1抛物线顶点坐标为点C14交x轴于点A30交y轴于点B.1求抛物线和直线AB的解析式2连结CACB对称轴x=1与线段AB交于点D求△CAB的铅垂高CD及S△CAB3如图2点P是抛物线在第一象限内上的一个动点连结PAPB是否存在一点P使S△PAB=S△CAB若存在求出P点的坐标若不存在请说明理由.
- 化学是一门以实验为基础的科学实验安全与规范至关重要.回答下列与加热操作相关的问题.加热试管内液体时液体不能超过试管容积的
- 计算x3·x56
- Thepolicemancaughttwoboysyesterday.Theystealtwomobilephones.
- 若有点AB坐标分别为3223则下列说法正确的是A.AB为同一个点B.AB的纵坐标相等C.AB为不同的两点D.以上说法都不正确