有关A.81的精选知识

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等比数列中，，，则的前4项和为（）A．81 B．120 ...

问题详情：等比数列中，，，则的前4项和为（）A．81 B．120 C．168 D．192【回答】B【解析】由得．∴，．故选B．知识点：数列题型：选择题...
81.With

问题详情：________________________________________,someanimalsarefacingthedangerofdyingout.(cut) 由于越来越多的森林被砍伐,一些动物正面临着灭绝的危险。larly____________________________________________Am...
81.Hebrokedownthe

问题详情：81.Hebrokedownthe_________(壁垒)thathadexistedbetweenracesandstylesofmusic.82.Their_________(complain)seemsillynow,butbackthenrockandrollwasallthemorepopularwiththeyouthbecauseparentsandgrandp...
81.Canyout

问题详情：81.Canyout____________（忍受）suchalongperiodofworktime?82．Inordertomake____________(准备)forthecomingcompetition,hedevoteshissparetimetoreadingeveryday. aref____________tousemobilephonesinschoo...
81.Theyfoundtheremainsofbuildingburiedb

问题详情：81.Theyfoundtheremainsofbuildingburiedb____________(在…下面)thesand.82.Iamsuggestingtoyouthatthereisa______________(区别))betweentruthandso-calledreality.83.Thenewly-builtrailwaywillbe_______...
4x2=81；

问题详情：4x2=81；【回答】解：∵x2=，∴x=±=±；知识点：平方根题型：计算题...
9的平方根是（）A、3 B、±3 C、81 D、±81

问题详情：9的平方根是（）A、3 B、±3 C、81 D、±81【回答】B知识点：平方根题型：选择题...
81.It’sthefirsttimethatIhadseenthemoviestarfacetoface.8...

问题详情：81.It’sthefirsttimethatIhadseenthemoviestarfacetoface.82.EnglishisoneoftheofficiallanguageusedinIndia.83.Althoughhetriestotalktomyclassmates,butIstillfindithardtomakefriendswithhim.84.Believi...
81. ...

问题详情：81. Inagesturetohelppreservehistory,theGreekgovernmenta ▲ ...
16x2＝81；

问题详情：16x2＝81；【回答】x＝±；（知识点：平方根题型：计算题...
81.Iknow

问题详情：81.Iknow______________(肯定地)howIcansolvetheproblem.82.Godhelpsthosewho_____________(依靠)themselves.83.Allthemoneyhehadhadbeen_________________(用完),sohehadtomakealivingby begging.84.Wes...
81.Thefarmersinthisareahadagoodharvestlastyearthanks...

问题详情： 81.Thefarmersinthisareahadagoodharvestlastyearthankstothes_____________farming. 82.Hewasa____________________inthebook. 83.Hefinishedhisworkinap__________________（积极的）wa...
算术平方根为9的数是( )．　　A．3 B．±3 　 C．81 　 D．±81

问题详情：算术平方根为9的数是( )．A．3 B．±3 C．81 D．±81【回答】C 知识点：平方根题型：选择题...
81． WhenIwaslittle,Friday’snightwasourfamilygamenight...

问题详情：81． WhenIwaslittle,Friday’snightwasourfamilygamenight.Aftersupper,wewouldplaycardgamesofallsortinthesittingroom.Asthekid,Ilovedtowatchcartoons,butnomatterhowmanytimesIaskedtowatchingthem,...
81.Farmworkersspendmostoftheirtime

问题详情：81.Farmworkersspendmostoftheirtime_____________.(在户外)82.Weusuallygooutforawalkat__________.(黄昏)83.Idideverythinginmy____________(能力；力量)tohelpyou.84.BillandIoften____________(不同意；有分...
10Iliveinasmalltowninthesouth.Thisistypical 81.

问题详情：10Iliveinasmalltowninthesouth.Thisistypical 81.________________Chinesetown.Therearenotonlytwomainstreets 82.________________whichacrossinthemiddleofthetown.Aroundthe...
81.Theteamp

问题详情：81.Theteamp___________whentheyrealizedtheywerelostandindanger.82.Christmasisaroundthecorner.It’stimetoputsomed______ ontheChristmas trees.83.Thebookistoodifficult!I’mafraidIwon’tbeabletor...
（﹣81）÷2+÷（﹣16）；

问题详情：（﹣81）÷2+÷（﹣16）；【回答】原式=﹣81×﹣×=﹣36；知识点：有理数的乘除法题型：计算题...
81.Thosewhob

问题详情：81.Thosewhob___________theircountrieswerehatedbyallthepeople.82.Theirteamiss___________,andit’shardforustobeat them.83.Alicemusthavedonesomethingwrong,becauseshe’slookingsog__________84.Boy...
（﹣81）÷2×（﹣）÷（﹣16）.

问题详情：（﹣81）÷2×（﹣）÷（﹣16）.【回答】解：（﹣81）÷2×（﹣）÷（﹣16）=﹣81×××=﹣1．知识点：有理数的乘除法题型：计算题...
3x3=-81

问题详情：3x3=-81【回答】知识点：平方根题型：计算题...
81.Thesungivesofflightandwarmth,thatmakesitpossibleforp...

问题详情：81.Thesungivesofflightandwarmth,thatmakesitpossibleforplantstogrow.82.Whenandwherewillthenextmeetingheld?83.Notonlytheteacherbutalsothestudentshastheireyesexaminedregularly.84.Theyoungmanishig...
81.Paul

问题详情：____ ____ (把手伸进）hispockettogethisphone.finishedtheworkonhisown____ ____ (因为）nobodyhelpedhim.83.____ ____ ____ (不是每一种）of birdcanfly.Saxons'svictoryabout600yearsearlier...
81.Itmakesasensetoworkontheproblembeforeitgetsoutofcont...

问题详情：makesasensetoworkontheproblembeforeitgetsoutofcontrol.rbinginthebookshewasreading,sheforgotlunch.teachercuredhimhisbadhabitsandhemadegreatprogressinEnglish.[Z-X-X-K]hertheteachernorthestudents...
81.Itisc

问题详情：81.Itisc_______________ofmybosstoallowmetohaveadayoffonMother’sDay.82.Youcan’texpectthatalltheproblemscanbe____________(解决)inaveryshorttime.83.Ana________________mustbemadebeforeyouseeyour...