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圆锥的侧面展开图是圆心角为π，面积为2π的扇形，则圆锥的体积是 ．
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高三下学期数学《》真题及答案
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一个圆锥的侧面展开图是圆心角为π半径为10cm的扇形则圆锥的体积为________.
圆锥的侧面积为5πcm2其侧面展开图的圆心角为72°则该圆锥的母线长为____________.
已知圆锥的侧面积恰好等于其底面积的2倍则该圆锥侧面展开图所对应扇形圆心角的度数为
60°
90°
120°
180°
已知圆锥的侧面积为16∏㎝2.1求圆锥的母线长L㎝关于底面半径r㎝之间的函数关系式2写出自变量r的取
若圆锥的侧面展开图是半径为2圆心角为180°的扇形则这个圆锥的体积是
若圆锥的侧面展开图是半径为5圆心角为的扇形则该圆锥的体积为.
若圆锥的侧面展开图是圆心角为120°半径为l的扇形则这个圆锥的表面积与侧面积的比是A.3:2B.2:
圆锥的全面积为15π侧面展开图的圆心角为60°则该圆锥的体积为.
已知一个圆锥的侧面展开图是圆心角为120°的扇形底面圆的直径为2则该圆锥的体积为.
如果圆锥的底面周长为20π侧面展开后所得扇形的圆心角为120°则该圆锥的侧面积为
100π
200π
300π
400π
一个圆锥的侧面积是底面积的2倍则圆锥侧面展开图扇形的圆心角是.
一个圆锥的侧面积是底面积的2倍.则圆锥侧面展开图的扇形的圆心角是.
一个圆锥的侧面积是底面积的3倍则该圆锥的侧面展开图的扇形圆心角等于.
已知圆锥的侧面展开图的圆心角为180°底面积为15cm2求圆锥的侧面积.
圆锥的母线长为6cm侧面展开图是圆心角为300°的扇形则圆锥底面半径cm侧面展开图的面积是cm2.
若一个圆锥的侧面积是底面积的2倍则圆锥侧面展开图的扇形的圆心角为
120°
180°
240°
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一圆锥的侧面展开后是扇形该扇形的圆心角为120°半径为6cm则此圆锥的表面积为_______cm2.
若圆锥的侧面展开图是圆心角为120°半径为l的扇形则这个圆锥的表面积与侧面积的比是
3:2
2:1
4:3
5:3
若圆锥的侧面展开图是半径为2圆心角为180°的扇形则这个圆锥的体积是
若一个圆锥的侧面积是底面积的2倍则圆锥侧面展开图的扇形的圆心角为
120°
180°
240°
300°
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MyfatherwasborninasmalltownintheUS.Hewasn'tsurewhathewantedfrom1butsomethingtoldhimto2andbeginanewadventure. HebeganthatadventuretravelingtocitiesintheUSbeforegoingontoAustraliaNewZealandandthePhilippines.Hetookmymotherandusthreedaughterswithhimandwentwherevertheroad3him. It'seasytofeel4whenyou'reontheroad.Wemadelotsofnewfriendsonourtrip﹣mostofthemaremechanicssinceweoften5hoursinrepairshops.Butthatwasawaymuch6thansittingbytheroadsidewhilewaitingfortheengineto7whenitwas40℃outside. Gettingalongwellsometimesseemed8.Therewerealwaysalotof9especiallyamongusback﹣seatpassengersaboutwhohadto10inthemiddle.Butevenifitwashardwelearnedalotabout11.WhenweweretravelinginthePhilippineswedrovetoQuezonCityoneday.Itshouldhavebeenanhour'sdrivebutwasnearlythreethankstobadroadsand12traffic.Didyouputoursuitcasesinthecar?myfatheraskedmymotheraswearrivedthere.Fromthebackseatwesawher13turntowardmyfather.Noshesaid.Ithoughtyoudid.Thatwashowaseven﹣hourcartripturnedintoa16﹣houronewhichwasmostlyspentin14. Onoccasionslikethatwehadtolearntoletgoofourangerbecausewewere15inarollingboxwiththesamepeoplefortherestofthe16.EvenifIsometimesfeltlikeopeningthecardoorand17oneofmysistersoutIkeptmyfeelingstomyself. Thisiswhyroadtripswerelike18universitiestous.We19ourPHDs博士学位inhowtogetalongwithotherpeoplejustbytravelinginouroldcar. Ifwewere20givenasecondchanceatlifewewoulddoitalloveragain.OnlythistimewouldIputthesuitcasesinthecarmyself. 1A.move B.life C.experience D.belief 2A.liveup B.struggleon C.getout D.walkaround 3A.took B.drove C.served D.controlled 4A.anxious B.upset C.helpless D.lonely 5A.wasted B.worked C.spent D.chatted 6A.better B.easier C.safer D.cleverer 7A.breakdown B.cooloff C.clearup D.turnover 8A.available B.alternative C.necessary D.impossible 9A.arguments B.fights C.embarrassments D.amusements 10A.settle B.rest C.sit D.watch 11A.sharing B.respect C.communication D.tolerance 12A.light B.thick C.local D.fast 13A.suddenly B.sensitively C.calmly D.slowly 14A.silence B.vain C.panic D.disappointment 15A.buried B.crazy C.stuck D.impatient 16A.holiday B.journey C.exploration D.march 17A.dragging B.pushing C.helping D.sending 18A.unusual B.common C.free D.mobile 19A.earned B.expected C.missed D.valued 20A.somewhere B.anytime C.somehow D.anyway
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I.M.PeitheChinese﹣Americanwhowasregardedasoneofthelastgreatmodernistarchitectshasdiedattheageof102. AlthoughheworkedmostlyintheUnitedStatesPeiwillalwaysberememberedforaEuropeanprojectHisredevelopmentoftheLouvreMuseuminParisinthe1980s.Hegaveustheglassandmetalpyramidinthemaincourtyardalongwiththreesmallerpyramidsandavastsubterranean地下的additiontothemuseumentrance. PeiwasthefirstforeignarchitecttoworkontheLouvreinitslonghistoryandinitiallyhisdesignswerefiercelyopposed.ButintheendtheFrench﹣andeveryoneelse﹣werewonover.WinningthefifthPritzkerArchitecturePrizein1983hewasthoughtasgivingthe20thcenturysomeofitsmostbeautifulinsidespacesandoutsideforms…Histalentandskillintheuseofmaterialsapproachthelevelofpoetry. AfterstudyingarchitectureattheMassachusettsInstituteofTechnologyandHarvardPeisetuphisownarchitecturalpracticeinNewYorkin1955. DesigningtheJohnF.KennedyPresidentialLibrary&Museumin1964establishedhimasaname.HisEastBuildingoftheNationalGalleryofArtinWashingtonin1978changedpeople'sideasofamuseum.Thesitewasanoddtrapezoid梯形shape.Pei'ssolutionwastocutitintwo.Theresultingbuildingwasdramaticlightandelegant﹣oneofthefirstcrowd﹣pleasingcathedralsofmodernart. Thoughknownasamodernistandnotableforhisformsbasedonarrangementsofsimplegeometric几何的shapesheonceurgedChinesearchitectstolookmoretotheirarchitecturaltraditionratherthandesigninginawesternstyle. InpersonI.M.Peiwasgood﹣humoredcharmingandunusuallymodest.Hisworkingprocesswasevolutionarybutinnovation创新wasneveranintendedgoal. Stylisticoriginalityisnotmypurposehesaid.Iwanttofindtheoriginalityinthetimetheplaceandtheproblem. 1WhatcanwelearnabouttheresultofredevelopmentoftheLouvreMuseum? A.ItwascriticizedbytheFrench. B.Itwasasuccess. C.ItmadetheLouvreMuseumlooksstrange. D.ItchangedthefunctionoftheLouvreMuseum. 2Whatcanwelearnfromtheunderlinedsentenceinparagraph3? A.Heisamasterinapplyingmaterials. B.Heisskilledinwritingpoems. C.Heoftencombinespoetryandconstruction. D.Hegetsinspirationfrompoetryindesigning. 3What'sthecorrectorderofthefollowingevents? a.DesigntheJohnF.KennedyPresidentialLibrary&Museum. b.StudyarchitectureattheMassachusettsInstituteofTechnologyandHarvard. c.DesigntheNationalGalleryofArt. d.WinthefifthPritzkerArchitecturePrize. A.abcd B.bacd C.bcad D.dacd 4WhatcanwelearnaboutI.M.Pei? A.Innovationwashisfirstgoalindesign. B.Hewastalentedandserious. C.Hepreferredwesternstyletotheeast. D.Helikedsimplegeometricshapes.
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解不等式组
7.5分Iusedtobecrazyaboutthehuntingseason.Theexcitementofwaitingforaprey猎物andtheprideofshowingoffthekillfascinatedme.Howevereverythingchangedafterthatcoldmorning. EarlyonthatdayofthelatefallIsetoffaloneforthewoodspackingagunabottleofhotcoffeeandthreethicksandwiches.Afterfindingthefreshdeer'stracksinthesnowIsettleddownbehindalittlebush. Isatthereforaboutanhour.ItwasthenthatIsawhim.Adeerabigbeautifuldeer!Therewasnocovernearertohimthan30yards.SurelyIcouldn'tmiss!IwaitedforhimtorealizeIwasthere.Iwaitedforhimtobeshockedandrunaway.Buthefooledmecompletely.Hecametowardsme!HewascuriousIsupposeormaybeliewasstupid﹣﹣﹣howelsecanyouexplainit?WellthatdeerwalkedrightuptowhereIwassitting.Thenhestoppedandlookedatme! Whathappenednextishardtobelievebutit'strue.Anditallseemedquitenatural.JustaswhenafriendlyyoungdeercomesnearyouIreachedupandscratchedhishead.Andhelikedtobescratched.Infacthepracticallyaskedformore.ThenIfedhimmysandwich!YesIknowwhatadeereatsbutthatdeeratemysandwich.Wellhefinallywenthiswaydownthehillandupthedeertrail.Shoothim?Notme.Youwouldn'thaveeithernotafterthat.Ijustwatchedhimgo. WhenIwasabouthalfwaybackIheardtwoshotsfollowedbyadullslam撞击afewsecondslater.Thosetwoshotsusuallymeanakill.Ihadforgottentherewereotherhuntersthatday. Thosehunterswouldneverknowtheycouldhavescratchedhishead. 1Whydidn'ttheauthorkillthedeer? A.Hepreferredtoshootashydeer. B.Hewasfooledbythetrickydeer. C.Hewassympatheticforthedeer. D.Hewastooshockedtoshootthedeer. 2Whatmostprobablyhappenedtothedeerintheend? A.Otherhuntersshotthedeertodeath. B.Otherhuntersscratchedthedeer'sheadtoo. C.Thedeermanagedtoescapefrombeingshot. D.Thedeerwouldbecomefriendswiththeauthor. 3What'sthebesttitleofthistext? A.AHuntinginLateFall. B.ALovelyDeer. C.TheCruelKilling. D.TheLastHunting.
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