18B.45C.63D.81的知识精选

在等差数列{an}中,a3+a4+a5+a6+a7=45,则S9=(  ) A.18B.45C.63D.81
问题详情:在等差数列{an}中,a3+a4+a5+a6+a7=45,则S9=()A.18B.45C.63D.81【回答】解答:解:∵等差数列{an}中,a3+a4+a5+a6+a7=5a5=45,∴a5=9;∴S9===9a5=81.故选D.知识点:数列题型:选择题...
“WASP-18b”可以造什么句,WASP-18b造句
WASP-18bisroughly10timesthemassofJupiter,anditorbitsonlyabout3millionkilometersfromitsstar.WASP-18b,whichwasdiscoveredwithtwintelescopeslocatedintheCanaryIslandsandSouthAfrica,islocatedabout400light-y...
81.Theyfoundtheremainsofbuildingburiedb
问题详情:81.Theyfoundtheremainsofbuildingburiedb____________(在…下面)thesand.82.Iamsuggestingtoyouthatthereisa______________(区别))betweentruthandso-calledreality.83.Thenewly-builtrailwaywillbe_______...
81.Theteamp
问题详情:81.Theteamp___________whentheyrealizedtheywerelostandindanger.82.Christmasisaroundthecorner.It’stimetoputsomed______ ontheChristmas trees.83.Thebookistoodifficult!I’mafraidIwon’tbeabletor...
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...
81.Hebrokedownthe
问题详情:81.Hebrokedownthe_________(壁垒)thathadexistedbetweenracesandstylesofmusic.82.Their_________(complain)seemsillynow,butbackthenrockandrollwasallthemorepopularwiththeyouthbecauseparentsandgrandp...
16x2=81;              
问题详情:16x2=81;              【回答】x=±;  (知识点:平方根题型: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.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)÷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.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.It’sthefirsttimethatIhadseenthemoviestarfacetoface.8...
问题详情:81.It’sthefirsttimethatIhadseenthemoviestarfacetoface.82.EnglishisoneoftheofficiallanguageusedinIndia.83.Althoughhetriestotalktomyclassmates,butIstillfindithardtomakefriendswithhim.84.Believi...
81.Thosewhob
问题详情:81.Thosewhob___________theircountrieswerehatedbyallthepeople.82.Theirteamiss___________,andit’shardforustobeat them.83.Alicemusthavedonesomethingwrong,becauseshe’slookingsog__________84.Boy...
10Iliveinasmalltowninthesouth.Thisistypical    81.
问题详情:10Iliveinasmalltowninthesouth.Thisistypical    81.________________Chinesetown.Therearenotonlytwomainstreets          82.________________whichacrossinthemiddleofthetown.Aroundthe...
(﹣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...
   81.Thefarmersinthisareahadagoodharvestlastyearthanks...
问题详情:   81.Thefarmersinthisareahadagoodharvestlastyearthankstothes_____________farming.    82.Hewasa____________________inthebook.     83.Hefinishedhisworkinap__________________(积极的)wa...
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...
81.Thesungivesofflightandwarmth,thatmakesitpossibleforp...
问题详情:81.Thesungivesofflightandwarmth,thatmakesitpossibleforplantstogrow.82.Whenandwherewillthenextmeetingheld?83.Notonlytheteacherbutalsothestudentshastheireyesexaminedregularly.84.Theyoungmanishig...
4x2=81;                      
问题详情:4x2=81;                      【回答】解:∵x2=,∴x=±=±;知识点:平方根题型:计算题...
81.                                                    ...
问题详情:81.                                                                Inagesturetohelppreservehistory,theGreekgovernmenta  ▲  ...
81.   WhenIwaslittle,Friday’snightwasourfamilygamenight...
问题详情:81.   WhenIwaslittle,Friday’snightwasourfamilygamenight.Aftersupper,wewouldplaycardgamesofallsortinthesittingroom.Asthekid,Ilovedtowatchcartoons,butnomatterhowmanytimesIaskedtowatchingthem,...
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.Canyout
问题详情:81.Canyout____________(忍受)suchalongperiodofworktime?82.Inordertomake____________(准备)forthecomingcompetition,hedevoteshissparetimetoreadingeveryday.  aref____________tousemobilephonesinschoo...
Iwenttoseethefilmaftersupper.Onmywaytothe      81.
问题详情:Iwenttoseethefilmaftersupper.Onmywaytothe      81._______________cinema.ImetanEnglishwoman,wholostherway.          82._______________Igaveupthechanceseethefilmandtookhertoher ...
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