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时间:2017-12-07
《2007年江苏省普通高等学校“专转本”统一考试大学英语》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2007年江苏省普通高等学校“专转本”统一考试大学英语第I卷(共100分)PartIReadingComprehension(共40分)PassageoneUnderproperconditions,soundwaveswillbereflectedfromahillsideorothersuchobstruction.Soundtravelsattherateofaboutone-fifthofmilepersecond.Ifthehilliselevenhundredfeetaway,ittakestwosecondsforthesoundtotravelothehilla
2、ndback.Thus,bytimingtheintervalbetweenasoundanditsreflection(theecho),youcanestimatethedistancetoanobstruction.Duringwordwar2theBritishusedapracticalapplicationofthisprincipletodetectGermanplanesontheirwaytobombLondonlongbeforetheenemywasnearthetarget.Theyusedradiowavesinsteadofsoundwaves,si
3、nceradiowavescanpenetratefogandclouds.TheoutnumberedRoyalAirForce(RAF)alwaysseemedtothepuzzledGermanstobelyinginwaitattherighttimeandnevertobesurprised.ItwasradioechoesmorethananythingelsethatwontheBattleofBritain.SincetheradiowaveswereusedtotellthedirectioninwhichtosendtheRAFplanesandthedis
4、tancetosendthem(theirrangeofflight,inotherwords),thedevicewascalledradiodirectingandranging,andfromtheinitialsthewordradarwascoined.(filescomefromwww.dinyuan.cn)1.Soundwavesreflectedfromahillcanbeusedtoestimatethe.A.heigtofthehillB.speedofsoundC.distancetothehillD.intensiteofsound2.Practical
5、applicationsofthisprinciplesresultedin.A.NewelectronicinstrumentsforplanesB.AradiodirectingandrangingdeviceC.NewradiosetsforRAFbombersD.Anelectronicdetectingdevice3.RadarenabledtheEnglishto.A.DetectGermanplanesontheirwaytoLondonB.DirecttheoutnumberedRAFplaneseffectivelyC.ConfuseGermanbomberp
6、ilots1中国专转本论坛www.dinyuan.cnD.BothAandB4.ItcanbeinferredfromthepassagethatA.LightwavescouldbeusedinadevicesimilartoradarB.Radarwasapracticalapplicationofawell-knownprincipleC.RadargreatlyincreasedtheeffectivenessoftheRoyalAirForceD.Soundwavesarereflectedfromahillsideunderallconditions5.Theaut
7、horofthispassageprobablyintendedtoexplainA.ExactlyhowradarworksB.WhytheBritishusedradiowavesintheirdeviceC.Howradar(workanddevice)cametobeD.HowradarhelpedtheBritishwintheBattleofBritainPassageTwoIngeneral,theancientRomanswereapracticalpeople.Theyca
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