全新版大学英语(第二版)综合教程4-Unit2TextA课后习题答案

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1、Unit2TextAPage37PairWork1.Howimportantwastheautomobileindustryinthetwentiethcentury?Theautomobileindustryrankedasamongthemostlucrativeandpowerfulindustriesofthetwentiethcentuiy・2.Whatwillhappentocarsandroadsinthetwenty-firstcentury?Carsandroadswillberevolutionizedinthetwenty-firstcentury.3・Why

2、doestheauthorsaythekeytotomorrow^"smartcars'1willbesensors?Becauseitissensorsthatwillenablevehiclesandroadstobeabletosee,hear,feel,smell,talk,andact.4.Howwouldsensorshelpreducetrafficfatalities?Sensorscansenseifadriverisdrunkandrefusetostartuptheengine.5.Whatisthefunctionoftheradarshiddeninthe

3、bumpers?Theradarshiddeninthebumperscanseanfornearbycars.Ifyoumakeaseriousdrivingmistakethecomputerwillsoundanimmediatewarning.6.Howwillasmartcaralertadriverwhofeelsdrowsy?Ifthedriver'seyelidscloseforacertainlengthoftimeandhisorherdrivingbecomeserratic,acomputerinthedashboardcouldalertthedriver

4、.7.Whatmakesitpossibleforsmartcarstodeterminetheirapproximatelocation?GPSmakesitpossibleforsmartcarstodeterminetheirlocationontheearthtowithinaboutahundredfeet.8.WhataretheprospectsforapplicationsofGPS?Withthepriceofmicrochipsdroppingsodrastically,futureapplicationsofGPSarevirtuallylimitless•9

5、.Whatis"telematics”expectedtoachieveinincreasingtheefficiencyandsafetyofhighwaytransportation?Itisexpectedtoputsmartcarsonsmarthighways.10.WhataretrafficengineersdoingonInterstate15closetoSanDiego?TheyareinstallinganMIT-designedsystemwhichwillintroducetheHautomateddriver11.11.Whathopesdopromot

6、ersofthesmarthighwayhaveforitsfuture?Theyhavegreathopesforitsfuture.By201(),telematicsmaywellbeincorporatedintooneofthemajorhighwaysintheUnitedStates.By2020,telematicscouldbeadoptedinthousandsofhighwaysintheUnitedStates.12.Whataretheadvantagesofsmarthighways?Smarthighwayscouldbeanenvironmental

7、boon,savingfuel,reducingtrafficjams，decreasingairpollution,andservingasanalternativetohighwayexpansion.WorkingonYourOwn1.PartOneParas.1-3PartTwoParas.4-9PartThreeParas.10-13Newtechnologywillhaveadramaticimpactoncarsandhighwaysinthe21stc