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大学英语四级阅读理解真题.docx

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大学英语四级阅读理解真题大学英语四级阅读理解真题大学英语四级阅读理解真题由小编为大家精心整理，希望对广大考生们有所帮助，祝广大考生取得考成绩！！Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.PassageOneQuestions57to61arebasedonthefollowingpassage.Youneverseethem,buttheyrewithyoueverytimeyoufly.Theyrecordwhereyouregoing,howfastyouretravelingandwhethereverythingonyourairplaneisfunctioningnormally.Theirabilitytowithstandalmostanydisastermakesthemseemlikesomethingoutofacomicbook.Theyreknownastheblackbox.Whenplanesfallfromthesky,asaYemeniairlinerdidonitswaytotheComorosIslandsintheIndianOceanJune30,2009,theblackboxisthebestbetforidentifyingwhatwentwrong.SowhenaFrenchsubmarine(潜水艇)detectedthedeviceshomingsignalfivedayslater,thediscoverymarkedahugesteptowarddeterminingthecauseofatragedyinwhich152passengerswerekilled.In1958,AustralianscientistDavidWarrendevelopedaflight-memoryrecorderthatwouldtrackbasicinformationlikealtitudeanddirection.Thatwasthefirstmodelforablackbox,whichbecamearequirementonallUScommercialflightsby1960.Earlymodelsoftenfailedtowithstandcrashes,however,soin1965thedevicewascompletelyredesignedandmovedtotherearoftheplanethearealeastsubjecttoimpactfromitsoriginalpositioninthelandingwells(起落架舱).Thatsameyear,theFederalAviationAuthorityrequiredthattheboxes,whichwereneveractuallyblack,bepaintedorangeoryellowtoaidvisibility.