全新版大学进阶英语综合教程第二册答案U5 Key to Exercises

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1、Unit5PioneersofFlightKeytoExercisesOpenerAMightyAirplaneBuiltbyHowardHughesin1947LengthItwas220feetlong.HeightItwashigherthanafive-storybuilding.WeightItweighedabout60tons.TripIthadtomakethetripfromCulvercityinCaliforniatothePacific,whichis30milesaway

2、.Reading&InteractingI.UnderstandingtheText1.TextOrganizationStoryTheheroWhenithappenedHowitrelatestomodernaviation1WanHuA.D.1500WanHu’scrazydreamcontainstheprinciplesofrocket-poweredspaceflight.2HowardHughesOnNovember2,1947Manyofthedesignfeaturesofthe

3、SpruceGoosehavebeenincorporatedintomoderncargoplanes.3LeonardodaVinciAbout500yearsagoTheflyingdeviceswithflappingwingscontrolledandsteeredbyhumanpilotshedesignedstillinspirepeopletopursuetheirdreamsofflyingfreelyinthesky.2.ComprehensionCheck2.1Focusin

4、gonthemainideasThearticleconsistsofthreestoriesaboutpioneersofflight.ThefirststoryisaboutaChinesenamedWanHu,whomadeanunsuccessfulattemptatspaceflightinA.D.1500.Hebuiltaspaceshippoweredby47rocketsusinggunpowder.Hisideawascrazy,buthisdreamofflightcametr

5、ue500yearslaterwhenChinasuccessfullylauncheditsfirstmannedShenzhouVspaceship.ThesecondoneisabouttheSpruceGoose,aflyingboatdesignedtomeettheneedoftransportingtroopsandmaterialsduringWorldWarII.Itwasmadeentirelyofwoodandstillholdstherecordforthegreatest

6、wingspan.Althoughitwasneverputtouse,manyofitsdesignfeatureshavebeenincorporatedintotoday’scargoplanes.ThelastisaboutLeonardodaVinci,themostfamousartistoftheRenaissance.Apartfromhisgreatartisticwork,healsodrewsketchesofflyingdeviceswithflappingwingscon

7、trolledandsteeredbyhumanpilots.Fivehundredyearslater,aprofessionalparachutistmadeasuccessfuljumpusingawoodandcanvasparachutebasedononeofdaVinci’sdesigns/sketches.2.2Diggingintodetail1.Becauseitwaspoweredbyrockets.2.Itwasthebiggestairplaneeverbuiltupto

8、thattime,andstillholdstherecordforthegreatestwingspan.Besides,itwasmadeentirelyofwood.3.No,becauseitwasbehindscheduleandwasnotcompleteduntilwellafterthewar.4.DaVinci’sflyingmachineshavewingsthatflaplikebirdsinflight.5.Becauseitisdifficultforor