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把一个长方形拉成平行四边形，面积和周长都不变． ．（判断对错）
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拉动一个活动的长方形框架将它拉成一个平行四边形．此时平行四边形的周长与原来长方形周长相比
变长
变短
不变
把一个长方形框架拉成一个平行四边形平行四边形的面积与原长方形面积相比
长方形面积大
平行四边形面积大
一样大
无法比较
把一个平行四边形木框拉成一个长方形那么现在的长方形与原来的平行四边形相比
周长不变．面积不变
周长变了．面积不变
周长变了．面积变了
周长不变．面积变了
把一个平行四边形活动框架拉成一个长方形那么原来平行四边形与现在长方形相比
周长不变．面积变小
周长变小．面积不变
周长不变．面积变大
周长变大．面积不变
用木条钉成一个长方形沿对角线拉成一个平行四边形．这个平行四边形与原来的长方形比平行四边形的面积
不变
变大
变小
一个长方形拉成一个平行四边形这个平行四边形的周长与原长方形周长相比
变大
变小
不变
无法确定
把一个平行四边形木框拉成一个长方形那么现在的长方形与原来的平行四边形相比
周长不变．面积不变
周长变了．面积不变
周长不变．面积变了
面积相等的长方形和平行四边形它们的周长
长方形大于平行四边形
平行四边形大于长方形
相等
无法比较
把一个平行四边形框架拉成一个长方形那么原来平行四边形和现在的长方形相比
周长不变 面积变了
周长变了 面积不变
周长不变 面积不变
把一个用木条做成的长方形拉成一个平行四边形平行四边形与长方形比较面积
一样大
长方形大
平行四边形
无法比较
用木条钉成一个长方形沿对角线拉成一个平行四边形．这个平行四边形与原来的长方形相比平行四边形的周长A平
不变
变大
变小．
把一个平行四边形的框架拉成长方形这个长方形的面积与原来平行四边形的面积相比
一样大
长方形面积大
平行四边形面积大
将一个用木条钉成的长方形拉成一个平行四边形如图那么
平行四边形的面积与长方形的面积相等
平行四边形的周长与长方形的周长相等
平行四边形的高与长方形的高相等
平行四边形的面积大于长方形的面积
把一个平行四边形活动框架拉成一个长方形那么原来平行四边形与现在长方形相比把一个平行四边形沿高剪拼成
周长不变．面积不变
周长变了．面积不变
周长不变．面积变了
周长变了．面积变了
把一个平行四边形活动框架四根木条钉成的拉成一个长方形那么原来平行四边形与现在长方形相比周长不变面积变
把一个平行四边形木框拉成一个长方形那么现在的长方形与原来的平行四边形相比
周长不变．面积不变
周长变了．面积不变
周长变了．面积变了
周长不变．面积变了
把一个平行四边形木框拉成一个长方形平行四边形与长方形比较
周长不变
面积不变
都不变
把一个平行四边形活动框架拉成长方形原来平行四边形与现在长方形比较
周长不变，面积不变
周长变了，面积变了
周长不变，面积变了
周长变了，面积不变
把一个平行四边形木框拉成一个长方形那么现在的长方形与原来的平行四边形相比
周长不变．面积不变
周长变了．面积不变
周长变了．面积变了
周长不变．面积变了
用木条钉成一个长方形框沿对角线拉成一个平行四边形．这个平行四边形与原来的长方形相比周长面积
不变
变大
变小
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假如你是学校AdventureClub的秘书Secretary你和社团__President讨论LiuDong的申请讨论完后请你根据对话内容给LiuDong回一封邮件. SecretaryWhatdoyouthinkaboutLiuDong'sapplication? PresidentIthinkhe'sexcellent.Heknowshowtoorganizeadventuresandheknowsalotabouthistoryandnature.HeoncemanagedtoarrangethetriptotheMogaoCavesforhimandhisparents. SecretaryThat'struebutIthinkhe'stooindependent.Weneedclubmemberswhocanworkwellwithothers. PresidentOntheotherhandwealsoneedpeoplewhoknowhowtomakeplansandcarrythemout.IthinkLiuDongcandothat. SecretaryButifheisnotfriendlynoonewillwanttotakepartintheactivitiesheorganizes. PresidentYou'reright.Ihaveasuggestion.Let'sofferhimatrialmembershipforthreemonths.Wecanaskhimtotrytobefriendlierandmoreoutgoing.Attheendofthreemonthshecanbecomeafullmemberifwethinkheisfitforourclub. SecretaryIthinkthat'sagoodidea.Let'ssendhimanemail. 注意1.词数100左右 2.邮件的开头和结尾已给出但不计入总词数. DearLiuDong I'mpleasedtotellyouthattheAdventureClubhasacceptedyouasamember.ThecommitteethinksthatyouwereverybravetoarrangethetriptotheMogaoCavesforyouandyourparents. Sincerelyyours MaLi.
下列从左到右的变形是因式分解的是A．3-x3+x=9-x² B．y+1y-3=3-yy+1C．4yz-2y²z+z=2y2z-zy+z D．-8x²+8x-2=-22x-1²
已知x+y=3xy=-7．求x-y2的值．
WhenRonaldReaganwhowasPresidentoftheUSAfrom1982to1989diedin2004manypeoplerememberedhisgoodsenseofhumor.Reaganenjoyedagoodjokeandoftenmadefunofhimself.Hewasveryoldalmost70yearsofagewhenhebecamePresidentoftheUSA.Becauseofthispeopleoftenjokedabouthisage.OnceduringameetingPresidentReaganwascomplainingaboutsomereporterswhosaidthathecouldnothearverywell.HewantedtoprovethathewashealthyandcouldhearwellsohetookouthishearingaidandsaidtothepeopleatthemeetingSaysomething.Onemanpretendedtospeak.Hemovedhismouthandmademovementswithhishands.EveryonethoughtReaganwouldbeangrybuthelaughedandlistenedforaverylongtime. PresidentReagannotonlyenjoyedagoodjokewhenhewasrelaxingbuthealsolikedtojokeduringserioussituations.In1981hehadashotaccident.Atthehospitalhejokedtothedoctorsthathehopedtheysupportedhiminthegovernmentandwouldlethimalive.Hewasabletokeephissenseofhumorevenwhenhewashurt. 29.RonaldReaganwasintheyear1985. A.areporterB.anactorC.adoctorD.apresident 30.ThereasonwhypeoplejokedaboutReagan'sagewasthat. A.hebecamePresidentoftheUSAattheageofalmost70 B.hewasnotoldenoughtobePresidentoftheUSA C.hecouldnotliveanormallifeathisage D.helackedasenseofhumorathisage 31.DuringameetingReagantookouthishearingaidtoprove. A.therewassomethingwrongwithhisears B.hewasabletomakeagoodspeech C.hewashealthyenoughtohearwell D.hehadagoodsenseofhumor 32.WhatsentRonaldReagantohospitalin1981? A.Hispoorhearing. B.Hisaccident. C.Hisoverwork. D.Hisillness.
如果a=b那么|a|=|b|该命题的逆命题是命题填真或假
若a2+2a=1则a+12=
因式分解4xa-2-2y2-a
因式分解a-ba-4b+10ab
已知2a=52b=102c=50那abc之间满足的等量关系不成立的是A．c=2b-1 B．c=a+b C．b=a+1 D．c=ab
WhenaskedaboutthepossibilitywhatJustinwastakenbyaliensthepolicemansaidnothing..
简便计算982-101×99
若xm=2xn=3则xm+2n的值为
阅读材料若m²-2mn+2n²-8n+16=0求mn的值． 解∵m²-2mn+2n²-8n+16=0∴m²-2mn+n²+n²-8n+16=0∴m-n²+n-4²=0∴m-n²=0n-4²=0∴n=4m=4．根据你的观察探究下面的问题1已知x²+2xy+2y²+2y+1=0求2x+y的值2已知a-b=4ab+c²-6c+13=0求a+b+c的值．
Ittookmemorethantwohourstocleanoutthefridgeandfreezerlastweek.AfterI41everydrawerandthrewaway42leftoversIwenttothegroceryshopforthefirsttimeinmonths. I'drunintotheshopforaloafofbreadmilkoreggs.I43fruitsandvegetablesandcleanedandcutthemintosmallpiecestostoreinmynewlycleanedfridge.I44clothesoutfromunderthegirls'45andwashedthem.Itookthree﹣inchpilesofpapersoutoftheirschoolfoldersandread46fromtheirteachers. Afterafewmonthsofworkinglike47IspentlastweekworkingasMomma.WhenyouareThemommaalotof48youfeellikethereisnoone49behindyoutotakeupthechores杂物.Icannot50imaginehowitmustfeeltobean51parent.ButI'mforfortunatebecauseasI52myselfinworkmyhouseandmychildren's53didn'thavetosuffer. MyhusbandZeb54uptotakecareofmykidandhome.Mymothercametostaywithmeforacoupleofweeks55Zebtravelledforwork.ThentherewasMrs.VelmamyangelIsentstraighthomefromheavenwhodoesasamatteroffactcleanmy56betterthanIevercouldbutwhomore57fillsmyhousewithpositiveenergyandwouldn'tletmeget58. Workingparentsall59tofindthebalancebetweenworkandhomethejobandfamily.Ipersonallydon'tthinkthatbalanceexistswithout60.WhileIwasontheworkendmymomVelmaZebandMadeleinemybabysittergavemehelp. 41.A.searched B.emptied C.watched D.noticed 42.A.broken B.separated C.unrecognizable D.different 43.A.judged B.sent C.bought D.took 44.A.kicked B.put C.picked D.dug 45.A.boxes B.cupboards C.beds D.tables 46.A.notes B.blame C.instructions D.articles 47.A.blind B.crazy C.mindless D.angry 48.A.ways B.aspects C.times D.moments 49.A.hiding B.running C.standing D.calling 50.A.still B.yet C.already D.even 51.A.strict B.loving C.single D.hard﹣working 52.A.stick B.devote C.absorb D.involve 53.A.lives B.study C.homework D.relationship 54.A.woke B.stepped C.put D.got 55.A.before B.since C.while D.if 56.A.bedroom B.yard C.road D.house 57.A.luckily B.gladly C.importantly D.diligently 58.A.angry B.pleased C.relaxed D.discouraged 59.A.deserve B.struggle C.keep D.continue 60.A.effort B.knowledge C.support D.judgment
因式分解x2+ax+b甲看错了a的值分解的结果是x+6x﹣2乙看错了b的值分解的结果为x﹣8x+4那么x2+ax+b分解因式正确的结果为
计算b5+b5得A．2b5 B．b7 C．b25 D．b10
因式分解a²a-b+4b²b-a
DearMsCai Thankyouforyourpresentationaboutvirtualreality.WewereamazedbyRealCine'sachievementin36userstoexperiencetheHimalayaswithouteverhavingtogothere.Certainlynooneusingitforfunandgameswillbe37.Howeverinmanywaysvirtualrealityseemsmorelikeatoyratherthanauseful38.Inthiscasewewouldlikeyoutofurther39howwecanusethisinurbanplanning.Wearenotvery40astowhetheranoperatorwillbeabletouseRealCineeasily. Weareconcernedaboutthepriceaswell.Youputforwardtheideathatwewillsave41ifweuseRealCine.Thismaybetrueinthelongterm.42thecostofbuildingaVRstudioisquitehighandthisseemslikeareal43.Pleasesendusmoreinformationonthedailycostsandonhowmuchtimeadesignusually44usingRealCine.Otherwisewecannotgoforward. WhileweareveryinterestedinRealCinewewillneedmuchmoreinformationbeforewecanmakea45. 36.A.forbidding B.allowing C.stopping D.asking 37.A.embarrassed B.excited C.disappointed D.delighted 38.A.technology B.book C.knowledge D.computer 39.A.explain B.guess C.decide D.include 40.A.interested B.worried C.frightened D.confident 41.A.life B.money C.face D.trouble 42.A.So B.Besides C.However D.Also 43.A.disadvantage B.danger C.reason D.chance 44.A.spends B.takes C.pays D.devotes 45.A.mistake B.difference C.decision D.living
Kidsattractedto2017SwedishOutdoorShowasspringstarts STOCKHOLMMarch12Xinhua﹣﹣AlthoughstillcoldintheNordicinearlyspringSwedishkidscouldn'twaittogoforoutdooractivitiesintheearlyspring. OnSaturdayoutdoorclubsandexhibitorsbroughttheirnewproductstotheSwedishOutdoorShow2017inStockholmandencouragedkidstoplayandjointheiractivities. Thisisgoldpanning淘金thatwedointhemiddlepartofSwedenasmalltowncalledKopparberg.ItisaniceactivityforchildrenforadultsjusttobeoutinthenatureandseethelovelynaturethatwehaveinSwedenandmaybefindsomegoldexhibitorUllaKalander﹣KarlssontoldXinhua.TheyhaveseentheprogramontelevisioncalledGoldRushthatcomesfromCanada.Somanypeopleareinterestedingoldpanningtheywanttoberich.Butyoudonotberichyoujustberichofseeingthenaturesheadded. ApartfromtraditionalactivitieslikekayakingandclimbingdivingisanotherfavoriteoutdoorsportsfortheSwedes. Stockholmissurroundedbylakesandeveryoneisreallygoingintolakesanddivingswimmingetc.KidsaretaughttoswimalreadyinschoolsoeverySwedishkidcanswimandgoingfromthereintodivingiseasyofcourseexhibitorAndersHolmbergtoldXinhua. Thethree﹣daySwedishOutdoorShowlastsuntilSundayandisexpectedtobringabout30000activeoutdoorpeoplewithdifferentinterestsandlevelsofexperience. 32.ThemainpurposeofholdingSwedishOutdoorShowisto. A.makesomepeoplebecomerich B.makeaprofitfortheorganization C.getmorepeopletogetclosetonature D.makepeoplemuchstrongerinhealth 33.Theunderlinedpartinthefirstparagraphprobablymeans. A.werenotwillingtogo B.hadastrongdesiretogo C.couldhavenoalternativebuttogo D.couldn'tdecidewhethertogoornot 34.Theauthor'spurposeofwritingthepassageisto. A.informB.entertainC.persuadeD.describe 35.Whichofthefollowingcanbethebesttitleforthepassage? C.ThePastandPresentofSwedishOutdoorShow B.NewProductsAddedto2017SwedishOutdoorShow A.AnOverallIntroductionof2017SwedishOutdoorShow D.KidsAttractedto2017SwedishOutdoorShowasSpringStarts.
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Useyourbrainyouwillfindanapproachtosolvingtheproblem..
AmericanswearblackformourningwhileChinesewearwhite.WesternersthinkofdragonsasmonsterswhileChinesehonorthemassymbolsofGod.Chinesecivilizationhasoftenshownsuchpolarities截然对立两极化withtheWestasthougheachstandsatextremeendsofaglobalstring.NowintheUniversityofCaliforniaBerkeleyapsychologisthasdiscovereddeeperpolaritiesbetweenChineseandAmericancultures﹣polaritiesthatgototheheartofhowwereasonanddiscovertruth. HisfindingsgofartowardexplainingwhyAmericanculturesseemtobecontentiousandChineseculturessopassivewhencomparedtoeachother.MoreimportantlytheresearchopensthewayforthepeopleoftheEastandtheWesttolearnfromeachotherinfundamentalway.TheChinesecouldlearnmuchfromWesternmethodsfordeterminingscientifictruthsaidPengKaipingaformerBeijingscholarwhoisnowaUCBerkeleyassistantprofessorofpsychologyandAmericanscouldbenefitgreatlyfromtheChinesetolerance容忍foracceptingcontradictions矛盾insocialandpersonallifehesaid. Americanshaveaterribleneedtofindoutwhoisrightinanargument.saidPengTheproblemisthatattheinterpersonallevelyoureallydon'tneedtofindthetruthormaybethereisn'tany.ChinesepeoplesaidPengarefarmorecontenttothinkthatbothsideshaveadvantagesanddisadvantagesbecausetheyhaveaholistic整体的awarenessthatlifeisfullofcontradictions.TheydofarlessblamingoftheindividualthanAmericansdo.headded. InstudiesofinterpersonalargumentforexamplewhensubjectswereaskedtodealwithcontradictoryinformationstemmingfromconflictsbetweenamotherandadaughterorastudentandaschoolPengfoundthatAmericanswerenon﹣compromisingblamingoneside﹣usuallythemother﹣forthecausesoftheproblemsdemandingchangesfromonesidetogetasolutionandofferingnocompromise和解indealingwiththeconflict冲突.ComparedtothisangrytheChinesewereparagons模范ofcompromisefindingfaultonbothsidesandlookingforsolutionsthatmovedbothsidestothemiddle. 32.InParagraph1theauthorsetsexamplesinorderto. A.showthedifferencesbetweenChineseandAmericans B.showthedifferencesbetweenChinesecultureandAmericanculture C.findthereasonforthedifferences D.generalizethemainideaofthepassage 33.TheunderlinedwordcontentiousinParagraph2probablymeans. A.conservative B.optimistic C.objective D.argumentative 34.ComparedwithAmericansChineseare. A.likelytofindthetruthinlife B.unwillingtoadmittheirownfailure C.unwillingtohaveageneralideaofthings D.likelytoknowadvantagesanddisadvantagesofthings 35.Thestudiesshowthat. A.anAmericantreatshisorhermotherbadly B.ideasoftreatingtheoldaredifferent C.charactersofChineseandAmericansaredifferent D.conflictsofAmericansandChinesearedifferent.
观察x-1x+1=x2-1x-1x2+x+1=x3-1x-1x3+x2+x+1=x4-1据此规律当x-1x5+x4+x3+x2+x+1=0时代数式x2015-1的值为
2017﹣03﹣10chinadaily.com.cn MotherNatureinChinesephotographer'slens Forthosewhohaven'tgotthetimetotravelthisexhibitionfeaturingnumerousphotosofthebeautyofMotherNaturewillbeadelightfortheweekend.Fromthesephotosvisitorscanseethegreatnessandpowerofnatureandthedifferencesbetweenhumansandanimals. Time9am﹣5pmthroughMar19closedonMondays VenueNationalArtMuseumofChina1WusiAvenueDongchengdistrict. TicketFree Contact010﹣64001476 TheBritishMuseumbringsahitshowtoBeijing TheBritishMuseum'shighly﹣acclaimedAHistoryoftheWorldin100Objectshasattractedmorethanonemillionvisitorsduringitsworldtour.ThatnumberisgrowingfastwithitsChinalegprovingasuccesssinceitopenedinBeijinglastweek. TheexhibitiondevelopedfromabroadcastingseriesthattheLondonmuseumstartedinpartnershipwiththeBBCin2010.Each15﹣minuteprogramintroducedoneof100objectsfromthemuseum'scollectionthatrevealed展现thecommunicationmethodsofvarioushumanculturesoverthecourseoftwomillionyears. Time9am﹣5pmthroughMay31closedonMondays VenueNationalMuseumofChina16EastChang'anAvenueDongchengdistrict. Ticket50yuan Contact010﹣65116400 Whenphotographslooklikepaintings Thelinebetweenpaintingandphotographyhasblurred模糊inconceptualartist概念艺术家FuWenjun'sworks.Fornearly30yearshehasdevotedhimselftotheexplorationofproducingphotosthatlooklikeabstractpaintingstoinspirepeopletothinkratherthansimplyappreciatetheaccuracyofimages.Fu'songoingexhibitionaimstoprovidemoreinsightsintohisartworld. Time9am﹣5pmthroughMarch19closedonMondays VenueNationalArtMuseumofChina1WusiStreetDongchengdistrict. TicketFree Contact010﹣64001476 Museumcelebrates80﹣year﹣oldlacquermaster KnownasthefatherofmodernChineselacquerart80﹣year﹣oldQiaoShiguangbreathesnewlifeintothecountry'slong﹣standingtraditionoflacquerpainting漆画. Heapplieseggshellchips蛋壳碎片todemonstratethepeacefulbeautyofSouthernChina.ThelacquerpaintsunderhisbrushespresentsthedepthofEasternaesthetics. Time9am﹣5pmthroughMar19 VenueNationalCenterforthePerformingArts2WestChang'anAvenueXichengdistrict. TicketFree Contact010﹣66550000 25.AccordingtothetextwecanlearnthatFuWenjunisan. A.photographerB.lacquerpainterC.broadcasterD.conceptualartist 26.AssumingyouareinterestedintraditionalChinesepaintingswhencanyougoandenjoyoneaccordingtothetext? A.10amMar31B.3pmMar19C.9pmMay31D.10amMay19 27.Youcanenjoythefollowingartworksfreeofchargeexcept. A.FuWenjun'sworks B.QiaoShiguang'sworks C.photosofthebeautyofMotherNature D.AHistoryoftheWorldin100Objects.
ItisapowerfreefridgewhichwasinventingbyafarmerfromFrance..
已知x-m2=x2+x+a则m=
Todayrollerskatingiseasyandfun.Butalongtimeagoitwasn'teasyatall.Before1750theideaofskatingdidn'texist.ThatchangedbecauseofamannamedJosephMerlin.Merlin'sworkwasmakingmusicalinstruments.Inhissparetimehelikedtoplaytheviolin.JosephMerlinwasamanofideasanddreams.Peoplecalledhimadreamer. OnedayMerlinreceivedaninvitationtoattendafancydressball.Hewasverypleasedandalittleexcited.AsthedayofthepartycamenearMerlinbegantothinkhowtomakeagrandentranceattheparty.Hehadanidea.Hethoughthewouldgetalotofattentionifhecouldskateintotheroom. Merlintrieddifferentwaystomakehimselfroll.Finallyhedecidedtoputtwowheelsundereachshoe.Thesewerethefirstrollerskates.Merlinwasveryproudofhisinventionanddreamedofarrivingatthepartyonwheelswhileplayingtheviolin. OnthenightofthepartyMerlinrolledintotheroomplayinghisviolin.Everyonewasastonishedtoseehim.Therewasjustoneproblem.Merlinhadnowaytostophisrollerskates.Herolledonandon.Suddenlyheranintoahugemirrorthatwashangingonthewall.Downfellthemirrorbreakingtopieces.NobodyforgotMerlin'sgrandentranceforalongtime! 1Thetextismainlyabout. A.astrangeman B.anunusualparty C.howrollerskatingbegan D.howpeopleenjoyedthemselvesinthe18thcentury 2PeoplethoughtMerlinwasadreamerbecausehe. A.oftengaveotherssurprises B.wasfullofimagination C.inventedtherollerskates D.wasagiftedmusician 3Merlinputwheelsunderhisshoesinorderto. A.impressthepartyguests B.arriveatthepartysooner C.testhisinvention D.showhisskillinwalkingonwheels 4Whatisthemainpointthewriteristryingtomakeinthelastparagraph? A.Rollerskatingwasdangerousandharmful. B.ThepartygueststhoughtMerlinwasafool. C.Merlinsucceededbeyondexpectation. D.Merlingothimselfintotrouble.
假如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的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错词下面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处不计分. OurEnglishteacherMs.Joancametoourschoolin1986.ShetaughtEnglishfornearly31yearssofar.Sheworkshardlyandhasbeenamodelteacherforages. Sheiskindtousbutsheisratherstrictwithusaswell.ShealwaysencouragesourselvestospeakandreadmoreEnglish.Sheisgoodatteachingandtriesherbesttomakeeverylessonlivelyandinterested.Sheisnotonlyourteacherandalsoourfriend.Westudentsloveandrespectforher. Tomorrowsheisgoingtoattendaimportantmeetingatwhichshewillbegivenamedalforhisadvanceddeeds.Webothsincerelycongratulateheronachievingsoextraordinaryachievements.
3a+3b+13a+3b-1=899则a+b=
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