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Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionCAreyouagreenerperson?Howcanwebecomeagreenerpe

rson?•Turnoffthelightswhenweleavearoom.•Walkorrideabikeinsteadoftakingabusorataxi.•Takeaclothbagwhenwegoshopping.•Don’tdriveacarifyoutr

avelashortdistance.•Writeonbothsidesofthepaper.•Don’tusethethingsthatcanbeusedonlyonce.•Afterwewashfaces,wecanusethewatertowashclothes.•TurnofftheTVs

etwhileweareaway.•…It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.electric(adj.)—electricity(n.)Doyouknowthem?Doyouknow

it?It’samaglevtrain.Itsadvantagesarequiet,fastandclean,butit’stooexpensive.磁悬浮列车n.技术Doyouknowit?Chinaisoneofthe

firstcountriesintheworldtousebiogastechnology.沼气1aReadandunderstand.Lookatthepictures.Doyouknowwhattheyare

?Choosetherightpictureforeachparagraph.paragraph2paragraph3Paragraph41bRead1aandmatchthewordswiththep

icturesonPage48.A.acidrainB.nuclearenergyC.biogasACBadj.原子核的，原子能的酸雨ReadParagraph1again,andthenmarkTrue(T)orFalse(F).•()It

’sgoodthatpeopleproducepowerfromcoal.•()Nuclearpowerisdangerous.Sowecan’tuseit.•()Tosolvetheenergyproblem,peopleallovertheworldarelook

ingfornewwaystoproducepower.TFTItskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.它最大的缺陷是生产过程需要很长时间（长达30天）和成

本高。processn.步骤，过程v.加工，处理requirev.需要，需求require有两种用法：*require(doing)sth.表示主语“该...了”。如：Thefloorrequireswashing.地板该洗了。*berequiredtodost

h.表示主语必须（被要求）...如:Studentsarerequiredtoattendclasses.学生必须按规定上课。Electricvehicleswere__________inthe1990s.OnApril11,2010,anewkindofelectricvehi

cle_______“Yezi”wasshowninthe2010ShanghaiWorldExpo.Itproduces_________fromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalso___

__energy.It’stoosmalltoholdmanypeople,but_______modelswillbedevelopedinthenearfuture.develop,electric,name,save,largedevelopedn

amedelectricitysavelarger1.去30公里以外的飞机场只需花费人们七分钟的时间。Ittakespeoplejust7minutestogototheairport30kmaway.2.火车最高时速能够达到每小时431公里。T

hetraincanreachatopspeedof431kmperhour.1cRead1aagainandcompletethetable.ItemAdvantageDisadvantagebiogaselectricvehiclemaglevtrainrenewabl

elongprocessandhighcostforitsbuildingsaveenergy,nopollutiontoosmalltoholdmanypeoplequiet,quick,energy-efficient,nopollutionmuchmoreex

pensivethantraditionalsteelrailways•coal---dirty,acid•nuclearenergy---dangerous•electricvehicles---thesun,thewindandCO2---protecttheenvi

ronment,saveenergy,small•maglevtrain---German-built,quiet,quick,nowheelnoise,energy-efficient,notpollutetheair•biogastechnology–straw,grassandanimalw

aste,everydaylives,require,thehighcostRetell1a•Germann.德国人，德语Germanyn.德国pl.Germanswheeln.轮，车轮，轮子E.g.TheyareGermans,andt

heyarefromGerman2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheuseof

oneenergysource.Thesun,wind,wavesandheatfromdeepintheearthareenergysources.Theywillneverrunoutsotheyarecalledrenewablesources.In2011,a

bout16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyear.deepadj.深的，厚的adv.深深

地，在深处runout用完，耗尽E.g.Hehasrunoutoffood,sohischildrenarehungry.2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailt

heuseofoneenergysource.1.Windcanproduceelectricityinmanyplaces.2.Peopleusesunlighttoproduceelectricity.3.Seawavesareusedforproducingelectricity.4.P

eopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.阳光，日光水蒸汽，

蒸汽，水汽2bTakenotesonyourdiscussionandwriteapassagewiththem.Youmaybeginlikethis:Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfr

omthesunlightindifferentwaysmanyyearsago…•Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyear

sago.Wecanuseittowarmthehouseinthewinter,toheatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenea

rfuture.•Asisknowntous,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandno

n-polluting.Besides,itdoesnoharmtoournature.Sowe’dbetteruseitasmuchaspossible.Youcanwriteitlikethis:•Welearn:1.Someword

s:technology,wheel,steel,require,German,guide,deep2.Somephrases:runout3.Somesentences:(1)Inmanycountries,peopleproducepowerfromcoal,butitisverydi

rtyandcausesacidrain.(2)Theywillneverrunoutsotheyarecalledrenewablesources.•Wecan:Talkabouttheadvantagesanddisadvantagesofsomekind

sofenergy.1.Read1a.2.Memorizetheusefulexpressionsandkeysentenceswhichwelearntoday.3.FinishSectionCinyourworkbook.4.ReviewSec

tionA-C.