资源描述：
《2017职称英语理工类c考前冲刺训练》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、2017职称英语理工类C考前冲刺训练本文档格式为WORD,感谢你的阅读。最新最全的学术论文期刊文献年终总结年终报告工作总结个人总结述职报告实习报告单位总结演讲稿2017职称英语理工类C考前冲刺训练 宝剑不磨要生锈;人不学习要落后。以下是小编为大家搜索整理的2017职称英语理工类C考前冲刺训练，希望对正在关注的您有所帮助!更多精彩内容请及时关注我们! BetterSolarEnergySystems:MoreHeat,MoreLight Solarphotovoltaicthermalenergysystems,orPVTs,
2、generatebothheatandelectricity,but__1__nowtheyhaven”tbeenverygoodattheheat-generatingpartcomparedtoastand-alonesolarthermalcollector.That”sbecausetheyoperateatlowtemperaturestocoolcrystallinesiliconsolarcells,whichletsthesilicongeneratemore__2__butisn”taveryefficientw
3、aytogatherheat. That”saproblemof__3_.Goodsolarhot-watersystemscanharvestmuchmoreenergythanasolar-electricsystematasubstantiallylower__4__.Andit，salsoaspaceproblem：photovoltaiccellscantakeupallthespaceontheroof,leavinglittleroomforthermalapplications. Inapairofstudie
4、s,JoshuaPearce,anassociateprofessorofmaterialsscienceandengineering,hasdeviseda__5__intheformofabetterPVTmadewithadifferentkindofsilicon.HisresearchcollaboratorsareKunalGirotrafromThinSiliconinCaliforniaandMichaelPathakandStephenHarrisonfromQueen”sUniversity,Canada.qu
5、ot; Mostsolarpanelsaremadewithcrystallinesilicon，butyoucanalsomakesolarcellsoutofamorphoussilicon,__6__knownasthin-filmsilicon.Theydon”tcreateasmuchelectricity,buttheyarelighter,flexible,andcheaper.And,becausethey__7__muchlesssilicon,theyhaveagreenerfootprint.Unfortu
6、nately，thin-filmsiliconsolarcellsare__8__tosomebad-newsphysicsintheformoftheStaebler-Wronskieffect. “Thatmeansthattheirefficiency__9__whenyouexposethemtolight—prettymuchtheworstpossibleeffectforasolarcell,”Pearceexplains，whichisoneofthe__10__thin-filmsolarpanelsmakeu
7、ponlyasmallfractionofthemarket. However,PearceandhisteamfoundawaytoengineeraroundtheStaebler-Wronskieffectbyincorporatingthin-filmsiliconinanew__11__ofPVT.Youdon”thavetocooldownthin-filmsilicontomakeitwork.Infact，Pearce”sgroupdiscoveredthatbyheatingittosolar-thermalo
8、peratingtemperatures，neartheboiling__12__ofwater,theycouldmakethickercellsthatlargely__13__theStaebler-Wronskieffect.Whenthe
