18B.45C.63D.81的精選

問題詳情：在等差數列{an}中，a3+a4+a5+a6+a7=45，則S9=（）A．18B．45C．63D．81【回答】解答：解：∵等差數列{an}中，a3+a4+a5+a6+a7=5a5=45，∴a5=9；∴S9===9a5=81．故選D．知識點：數列題型：選擇題...

問題詳情：（﹣81）÷2+÷（﹣16）；【回答】原式=﹣81×﹣×=﹣36；知識點：有理數的乘除法題型：計算題...

問題詳情：3x3=-81【回答】知識點：平方根題型：計算題...

問題詳情：________________________________________,someanimalsarefacingthedangerofdyingout.(cut) 由於越來越多的森林被砍伐,一些動物正面臨着滅絕的危險。larly____________________________________________Am...

問題詳情：81.Itisc_______________ofmybosstoallowmetohaveadayoffonMother’sDay.82.Youcan’texpectthatalltheproblemscanbe____________(解決)inaveryshorttime.83.Ana________________mustbemadebeforeyouseeyour...

WASP-18bisroughly10timesthemassofJupiter,anditorbitsonlyabout3millionkilometersfromitsstar.WASP-18b,whichwasdiscoveredwithtwintelescopeslocatedintheCanaryIslandsandSouthAfrica,islocatedabout400light-y...

問題詳情：makesasensetoworkontheproblembeforeitgetsoutofcontrol.rbinginthebookshewasreading,sheforgotlunch.teachercuredhimhisbadhabitsandhemadegreatprogressinEnglish.[Z-X-X-K]hertheteachernorthestudents...

問題詳情：____  ____ (把手伸進）hispockettogethisphone.finishedtheworkonhisown____  ____ (因為）nobodyhelpedhim.83.____  ____  ____ (不是每一種）of birdcanfly.Saxons'svictoryabout600yearsearlier...

問題詳情：（﹣81）÷2×（﹣）÷（﹣16）.【回答】解：（﹣81）÷2×（﹣）÷（﹣16）=﹣81×××=﹣1．知識點：有理數的乘除法題型：計算題...

問題詳情：81.                                                                Inagesturetohelppreservehistory,theGreekgovernmenta  ▲  ...

問題詳情：81.Theyfoundtheremainsofbuildingburiedb____________(在…下面)thesand.82.Iamsuggestingtoyouthatthereisa______________(區別))betweentruthandso-calledreality.83.Thenewly-builtrailwaywillbe_______...

問題詳情：81.Thesungivesofflightandwarmth,thatmakesitpossibleforplantstogrow.82.Whenandwherewillthenextmeetingheld?83.Notonlytheteacherbutalsothestudentshastheireyesexaminedregularly.84.Theyoungmanishig...

問題詳情：   81.Thefarmersinthisareahadagoodharvestlastyearthankstothes_____________farming.    82.Hewasa____________________inthebook.     83.Hefinishedhisworkinap__________________（積極的）wa...

問題詳情：81.Farmworkersspendmostoftheirtime_____________.(在户外)82.Weusuallygooutforawalkat__________.(黃昏)83.Idideverythinginmy____________(能力；力量)tohelpyou.84.BillandIoften____________(不同意；有分...

問題詳情：81.Iknow______________(肯定地)howIcansolvetheproblem.82.Godhelpsthosewho_____________(依靠)themselves.83.Allthemoneyhehadhadbeen_________________(用完),sohehadtomakealivingby  begging.84.Wes...

問題詳情：4x2=81；                      【回答】解：∵x2=，∴x=±=±；知識點：平方根題型：計算題...

問題詳情：81．   WhenIwaslittle,Friday’snightwasourfamilygamenight.Aftersupper,wewouldplaycardgamesofallsortinthesittingroom.Asthekid,Ilovedtowatchcartoons,butnomatterhowmanytimesIaskedtowatchingthem,...

問題詳情：81.Theteamp___________whentheyrealizedtheywerelostandindanger.82.Christmasisaroundthecorner.It’stimetoputsomed______ ontheChristmas trees.83.Thebookistoodifficult!I’mafraidIwon’tbeabletor...

問題詳情：16x2＝81；              【回答】x＝±；  （知識點：平方根題型：計算題...

問題詳情：Iwenttoseethefilmaftersupper.Onmywaytothe      81._______________cinema.ImetanEnglishwoman,wholostherway.          82._______________Igaveupthechanceseethefilmandtookhertoher ...

問題詳情：81.It’sthefirsttimethatIhadseenthemoviestarfacetoface.82.EnglishisoneoftheofficiallanguageusedinIndia.83.Althoughhetriestotalktomyclassmates,butIstillfindithardtomakefriendswithhim.84.Believi...

問題詳情：81.Hebrokedownthe_________(壁壘)thathadexistedbetweenracesandstylesofmusic.82.Their_________(complain)seemsillynow,butbackthenrockandrollwasallthemorepopularwiththeyouthbecauseparentsandgrandp...

問題詳情：81.Thosewhob___________theircountrieswerehatedbyallthepeople.82.Theirteamiss___________,andit’shardforustobeat them.83.Alicemusthavedonesomethingwrong,becauseshe’slookingsog__________84.Boy...

問題詳情：81.Canyout____________（忍受）suchalongperiodofworktime?82．Inordertomake____________(準備)forthecomingcompetition,hedevoteshissparetimetoreadingeveryday.  aref____________tousemobilephonesinschoo...

問題詳情：10Iliveinasmalltowninthesouth.Thisistypical    81.________________Chinesetown.Therearenotonlytwomainstreets          82.________________whichacrossinthemiddleofthetown.Aroundthe...