人教版高考英语一轮总复习精品课件 选择性必修3 Unit 4 ADVERSITY AND COURAGE.ppt

Thatincludeshugesavingsinmaintenancecostsandbetterprotectionofrailwaypersonnelsafety.ItiscalculatedthatEuropeanrailwaysalonespendapproximately20billioneurosayearonmaintenance,includingsendingmaintenancestaff,oftenatnight,toinspectandrepairtherailinfrastructure.Thatcanbedangerousworkthatcouldbeavoidedwithdronesassistingthecrewsefforts.Byusingthelatesttechnologies,dronescouldalsostartprovidinghigher-valueservicesforrailways,detectingfaultsintherailorswitches,beforetheycancauseanysafetyproblems.Toperformthesetasks,dronesforraildontneedtobeflyingoverhead.Engineersarenowworkingonanewconcept:theraildronesofthefuture.Theywillbemovingonthetrackaheadofthetrain,andprogrammedtorunautonomously.VerysmalldroneswithadvancedsensorsandAIandtravellingaheadofthetraincouldguideitlikeaco-pilot.Withtheirabilitytoseeahead,theycouldsignalanyproblem,sothatfast-movingtrainswouldbeabletoreactintime.一、理清脉络二、真题再做28.Whatmakestheapplicationofdronestoraillinespossible?A.Theuseofdronesincheckingonpowerlines.B.Dronesabilitytoworkathighaltitudes.C.Thereductionofcostindesigningdrones.D.Dronesreliableperformanceinremoteareas.细节理解题。根据第二段第一句可知,无人机目前正在被用来检查高压电线,这使得它将被应用于铁路系统成为可能。故选A项。A29.Whatdoes“maintenance”underlinedinparagraph3referto?A.Personnelsafety.B.Assistancefromdrones.C.Inspectionandrepair.D.Constructionofinfrastructure.词义猜测题。根据第三段中的“toinspectandrepairtherailinfrastructure”可以推断出,画线单词指的就是“维修,维护”。故选C项。C30.Whatfunctionisexpectedoftheraildrones?A.Toprovideearlywarning.B.Tomaketrainsrunautomatically.C.Toearnprofitsforthecrews.D.Toacceleratetransportation.细节理解题。根据最后一段的第一句和最后一句可知,人们期盼铁路无人机在未来能够提供预先警报,确保列车能及时应对问题,从而提高安全系数。故选A项。A31.Whichisthemostsuitabletitleforthetext?A.WhatFaultsCanBeDetectedwithDronesB.HowProductionof