山东省2012年高考英语书面表达专项训练:阅读表达+写作(20)书面表达第一节阅读表达[1]ScientistsintheUnitedStatesareworkingonatechnologythatuseshumanenergytopowerdeviceslikecellphones,laptopcomputers,andGPSsystems
[2]TomKrupenkin,whoteacheselectricalengineeringattheUniversityofWisconsinandhisteamwanttoreducedependenceoncostlyandpollutingbatteries
Insteadofusingbatteriesforpower,theyhaveturnedtohumanbeingsandhaveplacedadeviceinashoethatcollectsandstoresenergyfromhumanmotionandturnsitintoelectricity
Onepartofthisdeviceisanenergyharvester
Ithastwosmallcontainersfilledwiththousandsofverysmalldropsofliquid
Thesedropletsgetpushedbackandforthasapersonwalksandcandirectlyconvertitintoelectricpower
Outputofthisenergyisstoredinaregularrechargeabletinybatteryofthestylethatwehaveincellphones
[3]Theteamhasalsodevelopedasystemtopermituseofthes