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ID:9608413
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时间:2018-05-03
《高考英语素能提高题:unit2《the environment》(译林牛津版必修5)》由会员上传分享,免费在线阅读,更多相关内容在应用文档-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,renewableenergydrivesagrowingmarketforsolarenergyproducts.
2、Twoofthemaintypesofheatingproductsthattakeadvantageofsolarenergyarepassiveandactivesolarproducts.Thesetwotypesofsolarheatingsystemsdifferinhowtheyareconstructedandcanalsodiffergreatlyincost.Passivesolartechnologycanbeusedtoheatairorwaterdirectlyusingthesun’senergy.Unlikeanactivesolarappl
3、ication,passivesolarsetupsaccomplishtheirtaskwithouttheuseofadditionalelectricalcomponents,suchasfansthatneedanexternalelectricitysupply.Somesolarspaceheatingorwaterheatingsystemsareactivesolarheatingsystemsthathavevariouscomponentsthatrequireexternalpowersources.However,theydon’tusethes
4、olarenergydirectlytoheatairorwater.Becauseoftheirsimplicitycomparedwithactivesystems,passivesolarheatingsystemsgenerallyhavethelowercostofthetwo.Inadditiontothesesolarheatingsystems,therearealsosolarpowersystemsavailable.Ratherthanusethesun’senergyforheatingapplications,thesesystemschang
5、esolarenergyintoelectricity.Theseproductsareoftenconstructedfromhundredsofsolarenergycollectioncellscalledphotovoltaiccells,whichgenerateelectricityfromlight.Assunlightfallsonaphotovoltaiccell,thelight’senergyischangedintoelectricitythatcanthenbeusedtopowermanykindsofelectronicdevices.Be
6、causeofthecomplicatedtechnologyinvolved,thesekindsofsolarpowersystemscanbeveryexpensive.However,thecostsavingsmayeventuallymorethanpayoffyourinitialinvestmentinthesolarcells.Whenconsideringwhatkindofsolarheatingorpowersystemtoinstallinyourhomeorbusiness,besurethatyouarepurchasingyourequi
7、pmentfromareputablemanufacturerwhowillbeabletohelpyouwithanynecessaryrepairs,andperiodicupgrades.Title:__1____2__clean__3__environmentallyfriendly__4____5__usingthesun’senergydirectly•without__6__•simpleLowercostActiveheatingproductsusingthesun’senergyindirectly•withcompo
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