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Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionCAreyouagreenerperson?Howcanwebecomeagreenerperson?•Turnoffthelightsw

henweleavearoom.•Walkorrideabikeinsteadoftakingabusorataxi.•Takeaclothbagwhenwegoshopping.•Don’tdriveacarifyoutra

velashortdistance.•Writeonbothsidesofthepaper.•Don’tusethethingsthatcanbeusedonlyonce.•Afterwewashfaces,wecanuse

thewatertowashclothes.•TurnofftheTVsetwhileweareaway.•…It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.electric

(adj.)—electricity(n.)Doyouknowthem?Doyouknowit?It’samaglevtrain.Itsadvantagesarequiet,fastandclean,butit’stooexpensiv

e.磁悬浮列车n.技术Doyouknowit?Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.沼气1aReadandunderstand.Lookatthepictures.Doyouknoww

hattheyare?Choosetherightpictureforeachparagraph.paragraph2paragraph3Paragraph41bRead1aandmatchthewordswiththepicturesonPage48.A.acidrain

B.nuclearenergyC.biogasACBadj.原子核的，原子能的酸雨ReadParagraph1again,andthenmarkTrue(T)orFalse(F).•()It’sgoodthatpeopleproducepowerfromcoal.•()

Nuclearpowerisdangerous.Sowecan’tuseit.•()Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.TFTItskeydisadvantageisth

attheprocessrequiresalongtime(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：*req

uire(doing)sth.表示主语“该...了”。如：Thefloorrequireswashing.地板该洗了。*berequiredtodosth.表示主语必须（被要求）...如:Studentsarerequiredtoattendclass

es.学生必须按规定上课。Electricvehicleswere__________inthe1990s.OnApril11,2010,anewkindofelectricvehicle_______“Yezi”wasshowninthe2010Shanghai

WorldExpo.Itproduces_________fromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalso_____energy.It’stoosmalltoholdmanypeople,but_______m

odelswillbedevelopedinthenearfuture.develop,electric,name,save,largedevelopednamedelectricitysavelarger1.去30公里以外的飞机场只需花费人们七分钟的时间。Ittakespeoplejust

7minutestogototheairport30kmaway.2.火车最高时速能够达到每小时431公里。Thetraincanreachatopspeedof431kmperhour.1cRead1aagainandcomple

tethetable.ItemAdvantageDisadvantagebiogaselectricvehiclemaglevtrainrenewablelongprocessandhighcostforitsb

uildingsaveenergy,nopollutiontoosmalltoholdmanypeoplequiet,quick,energy-efficient,nopollutionmuchmoreexpensivethantraditionalsteelrailways•c

oal---dirty,acid•nuclearenergy---dangerous•electricvehicles---thesun,thewindandCO2---protecttheenviro

nment,saveenergy,small•maglevtrain---German-built,quiet,quick,nowheelnoise,energy-efficient,notpollutetheair•biogaste

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

heyarefromGerman2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheuseofoneenergysource.Thesun,wind,wavesandh

eatfromdeepintheearthareenergysources.Theywillneverrunoutsotheyarecalledrenewablesources.In2011,abou

t16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyear.deepadj.深的，厚的adv.深深地，在深处runout用

完，耗尽E.g.Hehasrunoutoffood,sohischildrenarehungry.2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheus

eofoneenergysource.1.Windcanproduceelectricityinmanyplaces.2.Peopleusesunlighttoproduceelectricity.3.Seawavesareusedf

orproducingelectricity.4.Peopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.阳光，日光水蒸汽，蒸汽，水

汽2bTakenotesonyourdiscussionandwriteapassagewiththem.Youmaybeginlikethis:Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightin

differentwaysmanyyearsago…•Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyear

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

inthenearfuture.•Asisknowntous,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandnon-polluting.Besides,itdoe

snoharmtoournature.Sowe’dbetteruseitasmuchaspossible.Youcanwriteitlikethis:•Welearn:1.Somewords:technology,wheel,steel,require,Ge

rman,guide,deep2.Somephrases:runout3.Somesentences:(1)Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.(2)They

willneverrunoutsotheyarecalledrenewablesources.•Wecan:Talkabouttheadvantagesanddisadvantagesofsomekindsofenergy.1.Rea

d1a.2.Memorizetheusefulexpressionsandkeysentenceswhichwelearntoday.3.FinishSectionCinyourworkbook.4.ReviewSectionA-C.