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【BlackBoxYouneverseethembutthey'rewithyoueverytimeyoufly.Theyrecordwhereyou'regoinghowfastyou'retravelingandwhethereverythingonyourairplaneisfunctioningnormally.Theirabilitytoresistalmostanydisastermakes】
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问题描述:

BlackBox

Youneverseethembutthey'rewithyoueverytimeyoufly.Theyrecordwhereyou'regoinghowfastyou'retravelingandwhethereverythingonyourairplaneisfunctioningnormally.Theirabilitytoresistalmostanydisastermakesthemseemlikesomethingoutofacomic(漫画) book.They'reknownastheblackbox.

WhenplanesfallfromtheskyasaYemeniairlinerdidonitswaytotheComorosIslandsintheIndianOceanonJune302009theblackboxisthebestmethodforidentifyingwhatwentwrong.SowhenaFrenchsubmarine(潜水艇) discovereditshomingsignalfivedayslateritmarkedahugesteptowarddeterminingthecauseofthedisasterinwhich152passengerswerekilled.

In1958.AustralianscientistDavidWarrendevelopedaflight-memoryrecorderthatwouldtrackbasicinformationlikealtitudeanddirection.ThatwasthefirstmodelforablackboxwhichbecamearequirementonallUScommercialflightsby1960.Earlymodelsoftenfailedtoresistcrasheshoweversoin1965itwascompletelyredesigned.ThatsameyeartheFederalAviationAuthorityrequiredthattheboxeswhichwereneveractuallyblackbepaintedorangeoryellowtobeeasiertosee.

Modemairplaneshavetwoblackboxes:avoicerecorderwhichtrackspilots'conversationsandaflight-datarecorderwhichmonitorsfuellevelsenginenoisesandotheroperatingfunctionsthathelpexpertsreconstructtheaircraft'sfinalmoments.Theboxescanresistpowerfulforceandtemperaturesupt02OOOoF.They'realsoabletosendoutsignalsfromdepthsof20000ft.ExpertsbelievetheboxesfromAirFranceFlight447 whichcrashednearBrazilonJune12009 areinwaternearlythatdeepbutstatisticssaythey'restilllikelytoturnup.Intheapproximately20deep-seacrashesoverthepast30yearsonlyoneplane'sblackboxeswereneverrecovered.

【小题1】Whatcanweleamabouttheblackboxfromthepassage?

A.Ithelpsanairplanefunctionnormally.B.Itsabilitytoavoiddisastersisamazing.C.Itisnecessaryequipmentonanairplane.D.Theideaforitsdesigncomesfromacomicbook.【小题2】FromtheblackboxontheYemeniairlinerwecangetinformationabout_____.A.thes

高胜回答:
  【小题1】C【小题2】B【小题3】A【小题4】D解析分析:文章介绍黑匣子在飞机上是必不可少的,它的用途是可以在飞机出事后用来分析事故发生的原因。【小题1】推理题:从第一段的句子:Youneverseethembu...
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