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如图，在长方体ABCD﹣A1B1C1D1中，AB＝BC＝2，AA1＝1，则BC1与平面BB1D1D所成角的正弦值为（ ）
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高二上学期数学《》真题及答案
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在长方体ABCD﹣A1B.1C.1D.1中AB=BC=2过A1C1B三点的平面截去长方体的一个角后得
如图已知长方体ABCD－
1
1
1
1
，过BC和AD分别作一个平面交底面A.
1
B.
1
C.
1
D.
1
于EF、PQ，则长方体被分成三个几何体中，棱柱的个数是( )
A.0B.1C.2D.3
如图长方体ABCD－A.1B.1C.1D.1中AB＝16BC＝10AA1＝8点E.F.分别在A.1B
如图已知长方体ABCD－A.1B.1C.1D.1中AB＝AA1＝2BC＝3M.为AC1与CA1的交点
长方体ABCD－A.1B.1C.1D.1中MN在平面BCC1B.1内MN⊥BC于M.则MN与AB的位
如图在长方体ABCD﹣A1B1C1D1中AD=AA1=1AB=2点E.在棱AB上且AE=1证明A1D
如图所示的多面体是由底面为ABCD的长方体被截面AEC1F.所截而得到的其中AB＝4BC＝2CC1＝
在长方体ABCD－A1B1C1D1中AB＝BC＝3AA1＝4则异面直线AB1与A1D所成的角的余弦值
在长方体ABCD—A1B1C1D1中已知AB=4AD=3AA1=2E.F.分别是线段ABBC上的点且
如图所示的多面体是由底面为ABCD的长方体被截面AEC1F所截而得到的其中AB=4BC=2CC1=3
如图已知在长方体ABCD－
1
1
1
1
中，AB＝AA
1
＝2，BC＝3，M.为AC
1
与CA
1
的交点，则M.点的坐标为( )
如图已知长方体ABCD－A.1B.1C.1D.1中AB＝AA1＝2BC＝3M.为AC1与CA1的交点
如图所示在长方体ABCD﹣A1B1C1D1中AA1=2AB=2BC求异面直线A1B与AD1所成角的余
在长方体ABCD－A.1B.1C.1D.1中AB＝2BC＝AA1＝1则D.1C.1与平面A.1BC1
如图在长方体ABCD－A1B1C1D1中AD＝AA1＝1AB>1小蚂蚁从点A.沿长方体的表面爬到点C
长方体ABCD－A.1B.1C.1D.1中AB＝AA1＝2AD＝1E.为CC1的中点则异面直线BC1
如图长方体ABCD﹣A1B1C1D1中AB=AD=2AA1=O.为底面中心.1求证A1O⊥平面BC1
如图在长方体ABCD－A.1B.1C.1D.1中AD＝AA1＝1AB＞1小蚂蚁从点A.沿长方体的表面
在长方体ABCDA.1B.1C.1D.1中AB＝BC＝2过A.1C.1B.三点的平面截去长方体的一
如图所示已知长方体ABCD—A.1B1C1D1中AB=BC=2AA1=4E.是棱CC1上的点且BE⊥
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Bodylanguageisthequietsecretandmostpowerfullanguageofall!Itspeaks21thanwords.Accordingtospecialistsourbodiessendoutmore22thanwerealize.Infactnon﹣verbalcommunicationtakesupabout50%ofwhatwereally23.Andbodylanguageisparticularly24whenweattempttocommunicateacrosscultures. Indeedwhatiscalledbodylanguageisso25apartofusthatit'sactuallyoftenunnoticed.Andmisunderstandingsoccurasaresultofit.26differentculturestreatthe27betweenpeopledifferently.NorthernEuropeansusuallydonotlikehaving28contactevenwithfriendsandcertainlynotwith29.PeoplefromLatinAmericancountries30toucheachotherquitealot.Thereforeit'spossiblethatin31itmaylooklikeaLatinois32aNorwegianallovertheroom.TheLatinotryingtoexpressfriendshipwillkeepmoving33.TheNorwegianveryprobablyseeingthisasrudebehaviorwillkeep34﹣whichtheLatinowillinreturnregardas35 Obviouslyagreatdealisgoingonwhenpeople36.Andonlyapartofitisinthewordsthemselves.Andwhenpartiesarefrom37culturesthere'sastrongpossibilityof38.Butwhateverthesituationthebest39istoobeytheGoldenRule:treatothersasyouwouldliketobe40. 21.A.straighter B.louder C.harder D.further 22.A.sounds B.invitations C.feelings D.messages 23.A.hope B.receive C.discover D.mean 24.A.immediate B.misleading C.important D.difficult 25.A.well B.far C.much D.long 26.A.Forexample B.Thus C.However D.Inshort 27.A.trade B.distance C.connections D.greetings 28.A.eye B.verbal C.bodily D.telephone 29.A.strangers B.Relatives C.neighbors D.enemies 30.A.inotherwords B.ontheotherhand C.inasimilarway D.byallmeans 31.A.trouble B.conversation C.silence D.experiment 32.A.interrupting B.helping C.guiding D.following 33.A.closer B.faster C.in D.away 34.A.steppingforward B.goingon C.backingaway D.comingout 35.A.weakness B.carelessness C.friendliness D.coldness 36.A.talk B.travel C.laugh D.think 37.A.different B.similar C.Latin D.European 38.A.curiosity B.excitement C.misunderstanding D.nervousness 39.A.chance B.time C.result D.advice 40.A.noticed B.treated C.respected D.pleased
Anycaraccidentisfrighteningbutanaccidentinwhichyourvehicleisthrownintothewaterwithyoutrappedinsideislyterrifying.36Howevermostdeathsresultfrompanicwithoutaplanorunderstandingwhatishappeningtothecarinthewater.Byadoptingabrace支撑positionactingdecisivelyandgettingoutfastyoucansaveyourselffromasinkingvehicle. Braceyourselfforimpact撞击力.Assoonasyou'reawarethatyou'regoingofftheroadandintoabodyofwateradoptabraceposition.Theimpactcouldsetofftheairbagsysteminyourvehiclesoyoushouldplacebothhandsonthesteeringwheelinthetenandtwoposition. Undoyourseatbelt.37Untiethechildrenstartingwiththeoldestfirst.Forgetthecellphonecall.Yourcarisn'tgoingtowaitforyoutomakethecall. 38Leavethedooraloneatthisstageandconcentrateonthewindow.Acar'selectricalsystemshouldworkforuptothreeminutesinwatersotrythemethodofopeningitelectronicallyfirst.Manypeopledon'tthinkaboutthewindowasanescapeoptioneitherbecauseofpanicormisinformationaboutdoorsandsinking. Breakthewindow.Ifyouaren'tabletoopenthewindoworitonlyopenshalfwayyou'llneedtobreakitwithanobjectoryourfoot.Itmayfeelcounter﹣intuitive有悖常理的toletwaterintothecar.39 Escapewhenthecarhasequalized.Ifithasreachedthedramaticstagewherethecarcabinhasbeenfilledwithwaterandithasbecomebalancedyoumustmovequicklyandeffectivelytoensureyoursurvival.40Whilethereisstillairinthecartakeslowdeepbreathsandfocusonwhatyou'redoing. A.Openthewindowassoonasyouhitthewater. B.Survivingasinkingcarisnotasdifficultasyouthink. C.Ittakes60to120secondsforacartofillupwithwaterusually. D.Suchaccidentsareparticularlydangeroustotheriskofdrowning. E.Inconclusionifyouknowwhattodointhewateryouwillbesafe. F.Thisisthefirstthingtoattendtoyetitoftengetsforgotteninthepanic. G.Butthesoonerthewindowisopenthesooneryoucanescapedirectlythroughit.
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WhenIwas8yearsoldIoncedecidedtorunawayfromhomeafteraquarrelwithmymother.WithmysuitcasepackedandsomesandwichesinabagIstartedforthefrontdoor. MymomaskedwhereIwasgoing.I'mleavinghomeIsaid. What'sthatyou'recarrying?sheasked. SomeclothesandfoodIreplied. Ifyouwanttorunawaythat'sallright.shesaid.Butyoucameintothishomewithoutanythingandyoucanleavethesameway. Ithrewmysuitcaseandsandwichesonthefloorandstartedforthedooragain. WaitaminuteMomsaid.Youdidn'thaveanyclothesonwhenyouarrivedandIwantthemback. Thisreallyinfuriatedme.ItoremyclothesoffshoessocksunderwearandallandshoutedCanIgonow? Yesmymomansweredbutonceyouclosethatdoordon'texpecttocomeback. IwassoangrythatIshutthedoorforcefullyandsteppedoutofmyhome.ThenInoticeddownthestreettwoneighborgirlswerewalkingtowardourhouse.IwassoshythatIsawthebigspruce云杉treeinouryardandjumpedunderthelow﹣hangingbranches.Apileofdried﹣upbrownneedles针状物werebeneaththetreeandyoucan'timaginethepainthosesharpneedlescausedtomybody. AfterIwassurethegirlshadpassedbyIrantothefrontdoorandknockedatitloudly. Who'sthere?Iheard. It'sBilly!Letmein! ThevoicebehindthethedooransweredBillydoesn'tlivehereanymore.Heranawayfromhome. LookingbehindmetoseeifanyoneelsewascomingdownthestreetIbeggedMom!I'msorry.I'mstillyourson.Letmein! ThedooropenedandMom'ssmilingfaceappeared.Didyouchangeyourmindaboutrunningaway?sheasked. What'sforsupper?Ismiledback. 4.Whentheauthorwasleavinghomehismotherorderedhimto. A.stayathome B.takesomesandwiches C.leaveeverythingbehind D.checkhissuitcasecarefully 5.Whichofthefollowingcanbestdescribetheauthor'smom? A.Selfishandproud. B.Strictbutloving. C.Kindandhelpful. D.Wisebutimpatient. 6.Theunderlinedwordinfuriatedprobablymeans. A.surprised B.warned C.encouraged D.angered 7.Whydidtheauthorjumpunderthelow﹣hangingbranches? A.Toavoidbeingseen. B.Tofindsomeneedles. C.Toplayajokeonthetwogirls. D.Toattractthetwogirls'attention. 8.ThelastsentenceWhat'sforsupper?mainlyshowsthattheauthor. A.feltveryhungryatthattime B.changedhisplantoleavehome C.wishedtoeatsomethingbeforeleaving D.wantedtoknowwhathismotherpreparedforsupper.
ThefreezingNortheasthasn'tbeenaterriblyfunplacetospendtimethiswintersowhenthechancecameforaweekendtoSarasotaFloridamybagswerepackedbeforeyoucouldsaysunshine.IleftforthelandofwarmthandvitaminC维生素Cthinkingofbeachesandorangetrees.WhenwetoucheddowntoblueskiesandwarmairIsentupasmallprayerofgratefulness.Swimmingpoolswinetastingandpinksunsetsatnormaleveninghoursnot4intheafternoonfilledtheweekendbutthebestpart﹣particularlytomytastedulledbymonthsofcold﹣weatherrootvegetables﹣wasa7a.m.adventuretotheSarasotafarmers'marketthatprovedtobemorethanworththeearlywake﹣upcall. Themarketwhichwasfoundedin1979setsupitstentseverySaturdayfrom7:00amto1pmrainorshinealongNorthLemonandStatestreets.Basketsofperfectredstrawberriesthered﹣paintedsidesoftheJavaDawgcoffeetruck;andmostofallthetomatoes:amazinglargesoftandroundredtomatoes. Disappointedbymanyabrokenvine﹣ripened蔓上成熟的promiseI'verefusedtobuywintertomatoesforyears.NomatterhowattractivetheylookinthestoreonceIgetthemhomethey'reunfailinglydryhardandtasteless.ButIhomedinwithuncertaintyononeparticulartableattheBrown'sGroveFarm'sstandfulloffreshandsofttomatoesthesizeofmyfist.Theseweretherealdeal﹣andatthatmomentIrealizedthatthebestpartofSarasotainwinterwasgoingtobeeatingthingsthatbackhomeinNewYorkIwouldn'tbeexperiencingagainformonths. DelightedasIwasbythetomatoesinsightmyhappinessdeepenedwhenIlearnedthatBrown'sGroveFarmisoneofthesuppliersforJackDustyanewlyopenedrestaurantattheSarasotaRitzCarltonwhere﹣luckilyforme﹣Iwasplanningtohavedinnerthatverynight.WithoutevenseeingthemenuIknewI'dbeorderingeverytomatoonit. 1WhatdidtheauthorthinkofherwinterlifeinNewYork? A.Exciting. B.Boring. C.Relaxing. D.Annoying. 2Whatmadetheauthor'sgettinguplateearlyworthwhile? A.Havingaswim. B.Breathinginfreshair. C.Walkinginthemorningsun. D.Visitingalocalfarmer'smarket. 3WhatcanwelearnabouttomatoessoldinNewYorkinwinter? A.Theyaresoft. B.Theylooknice. C.Theytastegreat. D.Theyarejuicy. 4Whatwastheauthorgoingtothatevening? A.Gotoafarm. B.Checkintoahotel. C.Eatinarestaurant. D.Buyfreshvegetables.
阅读下面短文在空白处填入1个适当的单词或括号内单词的正确形式答案写在答题卡上. Amousebecauseofan61luckchancemadeclosefriendswithanevilfrog.Oneday62frogplayedatrickonthemouseby63tieafootofthemousetohisown.Atfirstbothofthemjoinedtogetherandthefrog64leadhisfriendtowardthepoolinwhichhelivedanddidn'tstop65hereachedthesideofthewater.Thenthefrogsuddenlyjumpedintothewaterandthemousewaspulledinwith66he.Thefrogenjoyedthewaterandswaminitaroundhappilycrying67ifhehaddoneagreatdeed.Theunhappymousediedsooninthewaterandhisdeadbodyfloatedaroundonthesurface68fastentothefootofthefrog.Ahawksawthedeadmousesuddenlyflewdowntowardsitcaughtitandflewaway.Thefrogstilltiedtothelegofthemousewasalsocarriedoffasa69prisonandit70eatbythehawk.Harmhatchharmcatch.
每句中有一处错误.每处错误仅涉及一个单词的增加删除或修改. 增加:在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除:把多余的词用斜线\划掉. 修改:在错的词下划一横线并在该词下面写出修改后的词. 51.Doyouknowtherewasatimethentheyweregoodfriends?.
ThespecialbbetweenEnglandScotlandWalesandNorthernIrelandmakesUKagreatunionnotjustofnationsbutbetweenallofBritishcitizens.
Someteensdreamofanewcarorover﹣the﹣toppartyfortheirsweet16butonegrandfatherspentyears71makeamorethoughtfulgift72hisgranddaughter. WhenRosewastwohergrandpastartedtakingnoteseverytimetheyspenttimetogether.Hekept73habituntilshewasfivefillingupthreenotebooksoverthethreeyears. OnRose's16thbirthdayhergrandfatherdecidedshewasoldenoughto74fullappreciatethemeaningbehindthebooksand75givethemtoherasapresent.WhenRoserealized76thegiftwasshewasintotalshock. ThenotebooktoldofspecificthingsRose77doorsaid.Hergrandparecordedhis78memoryofthemtwolaughingandplayinggames.ThroughoutthestorieshewouldrepeatedlyaddhowmuchhelovedandcaredformesaysRose. Thegiftwillforeverbethe79greatgiftI'vereceivedbecauseofhowmuchvalueandmeaningithasbehinditshesays. Tomydelighttodayformybirthdaymygrandpagaveme3bookswithstoriesofeachtimehehungoutwithmefromtheageof2to5.Iwasso80moveastobespeechless.
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假设你是李华暑假期间你与父母乘飞机去了西藏旅游美丽的风景和当地居民的热情让你流连忘返.请你给在美国的笔友发一封邮件叙述你的所见并发表感想.内容要点如下: 1.欣赏高原风光如高地雪山等; 2.去当地居民家做客体验当地风俗品尝美食; 3.在导游陪同下参观布达拉宫和西藏博物馆购买纪念品并到离拉萨不远的羊八井温泉沐浴; 注意:1.词数100左右开头和结尾已为你写好不计入总词数; 2.短文中不能出现与本人相关的信息. 参考词汇:西藏Tibet;布达拉宫PotalaPalace;拉萨Lhasa; 温泉hotspring;高地highland;沐浴bathevi DearBetty Duringthesummerholiday LiHua.
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Ifyouareafruitgrower﹣orwouldliketobecomeone﹣takeadvantageofAppleDaytoseewhat'saround.It'scalledAppleDaybutinpracticeit'smorelikeAppleMonth.ThedayitselfisonOctober21butsinceithascaughtoneventsnowspreadoutovermostofOctoberaroundBritain. Visitinganappleeventisagoodchancetoseeandoftentasteawidevarietyofapples.TopeoplewhoareusedtothelimitedchoiceofapplessuchasGoldenDeliciousandRoyalGalainsupermarketsitcanbequiteaneyeopenertoseetherangeofclassicalapplesstillinexistencesuchasDeciowhichwasgrownbytheRomans.Althoughitdoesn'ttasteofanythingspecialit'sstillworthatryasistheknobbly多疙瘩的Cat'sHeadwhichismoreofacuriositythananythingelse. Therearealsovarietiesdevelopedtosuitspecificlocalconditions.OneoftheverybestvarietiesforeatingqualityisOrleansReinettebutyou'llneedawarmshelteredplacewithperfectsoiltogrowitsoit'sapipedreamformostappleloverswhofallforit. Attheeventsyoucanmeetexpertgrowersanddiscusswhichoneswillbestsuityourconditionsandbecausethesearefamilyaffairschildrenarewellcateredforwithapple﹣themedfunandgames. AppleDaysarebeingheldatallsortsofplaceswithaninterestinfruitincludingstatelygardensandcommercialorchards果园.IfyouwanttohavearealorchardexperiencetryvisitingtheNationalFruitCollectionatBrogdalenearFavershaminKent. 1Whatcanpeopledoattheappleevents? A.Attendexperts'lectures. B.Visitfruit﹣lovingfamilies. C.Plantfruittreesinanorchard. D.Tastemanykindsofapples. 2WhatcanwelearnaboutDecio? A.Itisanewvariety. B.Ithasastrangelook. C.Itisrarelyseennow. D.Ithasaspecialtaste. 3WhatdoestheunderlinedphraseapipedreaminParagraph3mean? A.Apracticalidea.B.Avainhope.C.Abrilliantplan.D.Aselfishdesire. 4Whatistheauthor'spurposeinwritingthetext? A.Toshowhowtogrowapples. B.Tointroduceanapplefestival. C.Tohelppeopleselectapples. D.Topromoteappleresearch.
AmongallseasonsIlikesummerbest.FirstofallsummeriswhenschoolisoutandIcanspendmostofmytime21bothoutsideandin.Myparents22metogetoutinsunlightasmuchaspossible.ThisisfinesincemyfriendsandIliketo23together.Weoftengoonbiketripswhichgiveusalotof24.Besidestherearemoredaylighthoursto25.Thesunstaysoutlonger26sometimeaftereightintheevening.Thismeansthatthere'salotmore27.Icangoswimmingorjust28togetasuntan日光浴.Idon'twanttodoitfortoolong29Idon'twanttogetburnt.ThesunisthereasonwhyweoftentakeawalkoutsidewhichIbelievecanhelpusstay30.Thelastreasonisthatit'sthe31timeofyearforussincewedon'tgetverymuchsunnyweatherwherewe32.Formostoftheyearit'seithercooland33orcoldandicyinmycountry.Weonlyhavethreemonthsofreprieve缓解fromthe34weather﹣thatissummer.WhenmyneighborsandIwantto35thesummerwegoouthavebarbecues烤肉orjustsitandtalk36.Thisisagoodthingtodoatnightwhenthe37ofthedayremainsintheair.38summeristhetimeofyearthatreallyputstogethereverythingIliketo39.Itiscertainlytheseasonthat40memost.21.A.singing B.playing C.working D.studying22.A.force B.warn C.invite D.encourage23.A.goout B.lookback C.runaway D.standup24.A.luck B.time C.fun D.help25.A.keep B.enjoy C.take D.count26.A.finally B.possibly C.suddenly D.usually27.A.sunshine B.moonlight C.noise D.air28.A.run B.jump C.lie D.walk29.A.once B.because C.unless D.although30.A.busy B.simple C.young D.healthy31.A.warmest B.quietest C.hardest D.shortest32.A.getoff B.crossover C.comefrom D.hurrydown33.A.hot B.wet C.fine D.snowy34.A.lovely B.clear C.freezing D.terrible35.A.celebrate B.lookfor C.introduce D.waitfor36.A.loudly B.bravely C.happily D.politely37.A.order B.heat C.story D.smell38.A.Atfirst B.Infact C.Asusual D.Inshort39.A.teach B.answer C.experience D.examine40.A.interests B.worries C.touches D.hurts
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Yourhousemayhaveaneffectonyourfigure.Expertssaythewayyoudesignyourhomecouldplayaroleinwhetheryoupackonthepoundsorkeepthemoff.Youcanmakeyourenvironmentworkforyouinsteadofagainstyou.Herearesomewaystoturnyourhomeintopartofdietplan. Openthecurtainsandturnupthelights.Darkenvironmentsaremorelikelytoencourageovereatingforpeopleareoftenlessself﹣consciouswhenthey'reinpoorlylitplaces﹣andsomorelikelytoeatlotsoffood.Ifyourhomedoesn'thaveenoughwindowlightgetmorelampsandfloodtheplacewithbrightness. Mindthecolors.Researchsuggestswarmcolorsfuelourappetites胃口.Inonestudypeoplewhoatemealsinablueroomconsumed消耗33percentlessthanthoseinayelloworredroom.Warmcolorslikeyellowmakefoodappearmoreappetizingwhilecoldcolorsmakeusfeellesshungry.Sowhenit'stimetorepaintgoblue. Don'tforgettheclock﹣﹣﹣ortheradio.Peoplewhoeatslowlytendtoconsumeabout70fewercalories卡路里permealthanthosewhorushthroughtheirmeals.Beginkeepingtrackofthetimeandtrytomakedinnerlastatleast30minutes.Andwhileyou'reatitactuallysitdowntoeat.Ifyouneedsomehelpslowingdownturnonrelaxingmusic.Itmakesyoulesslikelytorushthroughameal. Downsizethedishes.Bigservingbowlsandplatescaneasilymakeusfat.Weeatabout22percentmorewhenusinga12﹣inchplateinsteadofa10﹣inchplate.Whenwechoosealargespoonoverasmalleronetotalintake摄入jumpsby14percent.Andwe'llpourabout30percentmoreliquidintoashortwideglassthanatallskinnyglass. 1Thetextisespeciallyhelpfulforthosewhocareabout. A.theirhomecomforts B.theirbodyshape C.housebuying D.healthydiets 2Ahomeenvironmentinbluecanhelppeople. A.digestfoodbetter B.regaintheirappetites C.burnmorecalories D.reducefoodintake 3Whatarepeopleadvisedtodoatmealtimes? A.Fatquickly. B.Playfastmusic. C.Usesmallerspoons. D.Turndownthelights. 4Whatcanbeasuitabletitleforthetest? A.IsYourHouseMakingYouFat? B.WaysofServingDinner C.EffectsofSelf﹣Consciousness D.IsYourHomeEnvironmentRelaxing?
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