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ID:10149615
大小:172.17 KB
页数:6页
时间:2018-06-11
《高考英语素能提高题:unit2《theenvironment》(译林牛津版必修5)》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、高考英语素能提高题:Unit2《Theenvironment》(译林牛津版必修5)Ⅰ.填词Forthosewhoareconcernedaboutpollution,cleanandrenewableenergysourcesthathelptoprotecttheenvironmentsuchassolarenergyarebecomingpossiblealternativestooilandcoal.Increasingdemandforclean,renewableenergydrivesagrowingmarketforsolarenerg
2、yproducts.Twoofthemaintypesofheatingproductsthattakeadvantageofsolarenergyarepassiveandactivesolarproducts.Thesetwotypesofsolarheatingsystemsdifferinhowtheyareconstructedandcanalsodiffergreatlyincost.Passivesolartechnologycanbeusedtoheatairorwaterdirectlyusingthesun’senergy.Unl
3、ikeanactivesolarapplication,passivesolarsetupsaccomplishtheirtaskwithouttheuseofadditionalelectricalcomponents,suchasfansthatneedanexternalelectricitysupply.Somesolarspaceheatingorwaterheatingsystemsareactivesolarheatingsystemsthathavevariouscomponentsthatrequireexternalpowerso
4、urces.However,theydon’tusethesolarenergydirectlytoheatairorwater.Becauseoftheirsimplicitycomparedwithactivesystems,passivesolarheatingsystemsgenerallyhavethelowercostofthetwo.Inadditiontothesesolarheatingsystems,therearealsosolarpowersystemsavailable.Ratherthanusethesun’senergy
5、forheatingapplications,thesesystemschangesolarenergyintoelectricity.Theseproductsareoftenconstructedfromhundredsofsolarenergycollectioncellscalledphotovoltaiccells,whichgenerateelectricityfromlight.Assunlightfallsonaphotovoltaiccell,thelight’senergyischangedintoelectricitythatc
6、anthenbeusedtopowermanykindsofelectronicdevices.Becauseofthecomplicatedtechnologyinvolved,thesekindsofsolarpowersystemscanbeveryexpensive.However,thecostsavingsmayeventuallymorethanpayoffyourinitialinvestmentinthesolarcells.Whenconsideringwhatkindofsolarheatingorpowersystemtoin
7、stallinyourhomeorbusiness,besurethatyouarepurchasingyourequipmentfromareputablemanufacturerwhowillbeabletohelpyouwithanynecessaryrepairs,andperiodicupgrades.Title:__1____2__clean__3__environmentallyfriendly__4____5__usingthesun’senergydirectly•without__6__•simpleLowercostActive
8、heatingproductsusingthesun’senergyindirectly•withcompo
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