41.k2的精选

问题详情：已知＝(3,2)，＝(－1,2)，＝(4,1)．(1)求满足＝x＋y的实数x，y的值； (2)若(＋k)(2－)，求实数k的值．【回答】.解：(1)∵a＝xb＋yc，∴(3,2)＝x(－1,2)＋y(4,1)＝(－x＋4y,2x＋y)．∴解得(2)∵(a＋kc)(2b－a)，且a＋kc＝(3,2)＋k(4,1)＝(3＋4k,2＋k)，2b－a＝2(－1,2)－(3,2)＝(－5,2)，∴-5(3＋4k)+2(2...

问题详情：AtanairportIoverheardafatheranddaughterduringtheir  41  momentstogether.Her  42  wasreadyforboarding.Theyhuggedandhesaid,“Iloveyou.Iwishyou  43 ”Sheinturnsaid，“Daddy,Iwishyouenoug...

问题详情：ItwasverylatewhenIgotoutofthecinema.Bythetimethe  41   ended,itwas1a.m.Iwalkedtomy car whichwas   42   acrossthestreet.WhenIarrived,Inoticedsomething 43 ──thedoorswere unlock...

问题详情：31×41－11×41×2－9.5×11.【回答】31×41－11×41×2－9.5×11＝31×41－11×41－11×41－9.5×11＝41×(31－11)－11×(41＋9.5)＝(41＋)×20－(11＋)×51＝820＋10－561－17＝252.知识点：有理数的乘除法题型：计算题...

问题详情：41.Stayingupforplayingcomputergamesis_________(harm)tochildren’health.                           42.TheUSisChina’sbiggestexportmarket,___________(account)formoreth...

问题详情：I’vedreamedofbecomingawritersinceIwasateenager.But  41  isn’teasytogetabookofminepublished.  42  I’vetriedhard,noneofmybookshavebeenpublished.Thisisreally  43  (upset).Thismorni...

问题详情：   LongagotherewasapoorfarmerinRussia.Hehadbeenvery 41 witheverythinghehad.However,whenhefoundhiselderbrotherwas 42 thanhim,hefeltdisappointed.Sohe 43 hardabouthowhecouldalsobericher....

问题详情：Fastfoodisbecomingmoreand 41  _____ popularinChina,especiallyamongchildrenandteenagers.Thereareseveralexplanationsfor itspopularity.First,itisveryconvenientand42            a...

问题详情：studentsinChinacan’tspeakEnglish_____________(fluent).42._____________(determine)tomakehisdreamcometrue,hewenttoBeijingforfurtherstudy.problemisfarfrom___________(settle),sowewillhavetodiscus...

问题详情：ChristopherReeve, 41__wasborninSeptember,1952,wasinhisfirstschoolplay 42__hewaseightandhestartedtoactinTVshowsandfilmswhilehewasstillincollege.Hemademany____43___(success)filmsandTVshowsbuth...

问题详情：Britishpeopleareworkingtoanolderage.41._____numberofworking70-74-year-oldshasdoubledinrecentyears.Around10%ofpeoplein42.______(they)early70snowwork.Thisisthe43.______(high)figureonrecord.Animp...

问题详情：PersonallyIthinktrainsareexcitingandromantic.Imust  41  thattrainsarenotimportantmeansoftransportationintheUS,butIdohavesome  42  withthem.WhenIwasachild,growingupinasmalltownwithveryl...

问题详情：Acceptlifeasitis.Ilearnedhowtodoitfrommyfather. 41_,hedidnotteachmeacceptancewhenhewasstrongandhealthy,butratherwhenhewas 42  andill.Myfatherwas 43_astrongmanwholovedbeingactive,butaterri...

问题详情：Iwaslookingthroughsomeoldphotoalbumstheotherday.Ihad 41  donethatmanytimesbeforebutIfeltasudden 42  toseethemagain.Ifoundmyself 43  somanybeautifulmemoriesfrommychildhood.Therewasmyde...

问题详情：41.TheforeignerscametoChinainordertolearnChinesea_________（农业的）skills.42.Mexicogaineditsi_________（*）fromSpainin1821.43.Thenewbuildingdestroytheb_________（美丽）ofthecountryside.studentsmusta_____...

问题详情：41.Ithinkheisnot______(self).Hehasbeenconcernedwith peoplearoundhim.42.Millionsoffansadmirehisathleticability,_________(motivate)andconfidence.43.___________wewillgocampingtomorrowornotdepend...

在世界第二峰k2山上被困了五天后，五个加拿大登山队员于昨天获救。在这里，你将感受古老的文化，新鲜的空气，伟大的山脉，当然还有世界上最伟大的积雪盖顶的山峰，k2、珠穆朗玛、甘城章嘉。...

问题详情：41.When___________(explore)thecave,theyfoundavaluablemineral.42.I’llgivetheticketsto________wantsit.43.eisthefirstperson_________(arrive)andhewillarriveatthreethisafternoon.44.Theoldcoupleoft...

问题详情：41.Toeveryone’ss____________,thegirlfinishedthejobquitewell.42.SinceIwasnotbusy—mypatientdidn’tturnupatthea__________hour,Iwouldexaminehiswound.employerwillc____________(*实)thatIwasthereon...

问题详情：   MybrotherandIslippedoutofthebed.Wegrabbedour   41   andputonourshoes.Withoutheatersinouroldhome,wearingcoatsinsidewasas   42   aswearingshirtsinsummer.   Butthismorningwas...

问题详情：41.Wecametoknoweachotheralongtime_________.42.Children__________6mustvisitthemuseumtogetherwiththeirparents.43.Hegavehersomerosesinreturn__________herkindness.44.Wehaven'tdiscussedthematter__...

问题详情：theprinceandtheprincesslived______(和平地)together.42.Movingtoanewhouseisavery_________(紧张的）experience.43.Hec_____(抱怨)thatnothingcameoutthewayhehadexpected.44.Suddenlyhereceivedan_____(紧...

问题详情：ItwasacoolOctoberevening.Excitementandfamilymembers  41  thehall.Iwasonlya7-year-oldgirl,butIwasthecenterof  42 .Finally,afterweeksofpreparation,Iwould  43  allmyhardworkinadanceper...

问题详情：NewYear’sDaywascoming.MymotherandIdecidedtovisitmy  41 nWales.Whentravelingthroughahighway,wefelt  42 andwereeagertoeat.Wenoticedaroadsign  43 toatowncalledBend.Thinkingthatwemightbu...

问题详情：Computergamesarepopularallaroundtheworld.Manypeople  41   thesegamesontheInternet.Gameslookmoreandmore  42   ascomputertechnologyimproves.Manypeopledescribeplayingcomputergamesas  ...