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1、2015年职称英语真题备考更多精品,尽在学派网!2010年职称英语等级考试真题（理工类A级）第2部分：阅读判断CaliforniaGivesGreenLighttoSpaceSolarPowerEnergybeameddownfromspaceisonestepclosertoreality,nowthatCaliforniahasgiventhegreenlighttoanagreementthatwouldseethePacificGasandElectricCompanybuy200megawatts（兆瓦）ofpowerbeameddownfromsolar-powersatelli
2、tesbeginningin2016.Butsomemajorchallengeswillhavetobeovercomeifthetechnologyistobeusedwidely.Astart-upcompanycalledSolarenisdesigningthesatellites,whichitsayswilluseradiowavestobeamenergydowntoareceivingstationonEarth.Theattractionofcollectingsolarpowerinspaceisthealmostuninterruptedsunshineavailab
3、leingeosynchronous（与地球同步的）orbit.Earth-basedsolarcells,bycontrast,canonlycollectsunlightduringdaytimeandwhenskiesareclear.Butspace,basedsolarpowermustgrapple（努力克服）withthehighcostperkilogramoflaunchingthingsintospace,saysRichardSchwartzofPurdueUniversityinWestLafayette,Indiana.“Ifyou’retalkingaboutit
4、beingeconomicallyviableforpoweroftheEarth,it’satoughgo,”hesays.CalBoerman,Solaren’sdirectorofenergyservices,saysthecompanydesigneditssatelliteswithaviewtokeepinglaunchcostsdown.“Weknewwehadtocomeupwithadifferent,revolutionarydesign,”hesays.Apatentthecompanyhaswondescribeswaystoreducethesystem’sweig
5、ht,includingusinginflatablemirrorstofocussunlightonsolarcells,soasmallernumbercancollectthesameamountofenergy.Butusingmirrorsintroducesotherchallenges,includingkeepingthesolarcellsfromoverheating,saysSchwartz.“Youhavetotakecareofheatdissipation（散发）becauseyou’renowconcentratingalotofenergyinoneplace
6、,”hesays.Accordingtothecompany’spatent,Solaren’ssolarcellswillbeconnectedtoradiatorstohelpkeepthemcool.ThoughBoermansaysthecompanybelievesitcanmakespace-basedsolarpowerwork,itisnotexpectingtocrowdoutotherformsofrenewableenergy.LawsinCaliforniaandotherstatesrequireincreasinguseofrenewableenergyincom
7、ingyears,hepointsout.“Tomeetthoseneeds,we’regoingtoneedalltypesofrenewableenergysources,”hesays.加利福尼亚州批准空间太阳能电站从太空中获取能量的设想距现实更近了一步，因为加州为太平洋天然气电力公司从2016年开始购买200兆瓦由太阳能卫星反射回来的能量的合约开了绿灯。但要广泛使用这项技术，仍有一些挑战需要克服。发出
