2010年职称英语理工类阅读理解练习.doc

《2010年职称英语理工类阅读理解练习.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、2010年职称英语理工类阅读理解练习(1)ElectricBackpack　　Backpacksareconvenient.Theycanholdyourbooks，yourlunch，andachangeofclothes，leavingyourhandsfreetodootherthings.Someday，ifyoudon'tmindcarryingaheavyload，yourbackpacksmightalsopoweryourMP31player，keepyourcellphonerunning，andmay

2、beevenlightyourwayhome.　　LawrenceC.RomeandhiscolleaguesfromtheUniversityofPennsylvaniainPhiladelphia2andtheMarineBiologicalLaboratoryinWoodsHole3，Mass.4，haveinventedabackpackthatmakeselectricityfromenergyproducedwhileitswearerwalks.Inmilitaryactions，search-and-re

3、scueoperations，andscientificfieldstudies，peoplerelyincreasinglyoncellphones，globalpositioningsystem(GPS)5receivers，night-visiongoggles，andotherbatterypowereddevicestogetaroundanddotheirwork.Thebackpack’selectricity-generatingfeaturecoulddramaticallyreducetheamoun

4、tofawearer’sloadnowdevotedtosparebatteries，reportRomeandhiscolleaguesintheSept.9Science6.　　Thebackpack’selectricity-creatingpowersdependonspringsusedtohangaclothpackfromitsmetalframe.Theframesitsagainstthewearer’sback，andthewholepackmovesupanddownasthepersonwalks

5、.Agearmechanismconvertsverticalmovementsofthepacktorotarymotionsofanelectricalgenerator，producingupto7.4watts.　　Unexpectedly，testsshowedthatwearersofthenewbackpackaltertheirgaitsinresponsetothepack’soscillations，sothattheycarryloadsmorecomfortablyandwithlesseffor

6、tthantheydoordinarybackpacks.Becauseofthatsurprisingadvantage，Romeplanstocommercializebothelectricandnon-electricversionsofthebackpack.　　Thebackpackcouldbeespeciallyusefulforsoldiers，scientists，mountaineers，andemergencyworkerswhotypicallycarryheavybackpacks.Forth

7、erestofus，power-generatingbackpackscouldmakeitpossibletowalk，playvideogames，watchTV，andlistentomusic，allatthesametime.Electricity-generatingpacksaren’tonthemarketyet，butifyoudogetoneeventually，justmakesuretolookbothwaysbeforecrossingthestreet!　　词汇:　　backpack/5bAk

8、pAk/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/kE5mE:FE