2012年职称英语《理工类》阅读理解练习题.docx

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1、2012年职称英语《理工类》阅读理解练习题（1）ElectricBackpack　　Backpacksareconvenient.Theycanholdyourbooks，yourlunch，andachangeofclothes，leavingyourhandsfreetodootherthings.Someday，ifyoudon'tmindcarryingaheavyload，yourbackpacksmightalsopoweryourMP31player，keepyourcellphon

2、erunning，andmaybeevenlightyourwayhome.　　LawrenceC.RomeandhiscolleaguesfromtheUniversityofPennsylvaniainPhiladelphia2andtheMarineBiologicalLaboratoryinWoodsHole3，Mass.4，haveinventedabackpackthatmakeselectricityfromenergyproducedwhileitswearerwalks.Inmi

3、litaryactions，search-and-rescueoperations，andscientificfieldstudies，peoplerelyincreasinglyoncellphones，globalpositioningsystem(GPS)5receivers，night-visiongoggles，andotherbatterypowereddevicestogetaroundanddotheirwork.Thebackpack’selectricity-generatin

4、gfeaturecoulddramaticallyreducetheamountofawearer’sloadnowdevotedtosparebatteries，reportRomeandhiscolleaguesintheSept.9Science6.　　Thebackpack’selectricity-creatingpowersdependonspringsusedtohangaclothpackfromitsmetalframe.Theframesitsagainstthewearer’

5、sback，andthewholepackmovesupanddownasthepersonwalks.Agearmechanismconvertsverticalmovementsofthepacktorotarymotionsofanelectricalgenerator，producingupto7.4watts.　　Unexpectedly，testsshowedthatwearersofthenewbackpackaltertheirgaitsinresponsetothepack’so

6、scillations，sothattheycarryloadsmorecomfortablyandwithlesseffortthantheydoordinarybackpacks.Becauseofthatsurprisingadvantage，Romeplanstocommercializebothelectricandnon-electricversionsofthebackpack.　　Thebackpackcouldbeespeciallyusefulforsoldiers，scien

7、tists，mountaineers，andemergencyworkerswhotypicallycarryheavybackpacks.Fortherestofus，power-generatingbackpackscouldmakeitpossibletowalk，playvideogames，watchTV，andlistentomusic，allatthesametime.Electricity-generatingpacksaren’tonthemarketyet，butifyoudo

8、getoneeventually，justmakesuretolookbothwaysbeforecrossingthestreet!　　相关词汇：　　backpack/5bAkpAk/n.背包watt/wCt/n.瓦(特)　　receiver/ri5si:vE(r)/n.接收机gait/eit/n.步态，步法　　night-visiongoggle夜视镜oscillation/7Csi5leiFEn/n.摆动　　spring/spriN/n.弹簧commercialize/kE5