Unit+2+Topic+3+Section+C 仁爱版九年级英语上册

Unit2SavingtheEarthTopic3SectionC 学习导航新知学习课堂小结当堂检测学习目标重点研讨新知学习课堂小结当堂检测学习目标重点研讨学习目标1.

能熟悉并正确运用本课时的重点单词和短语2.

能通过阅读文章，了解现代科学技术在环境保护方面的作用新知学习课堂小结当堂检测学习目标重点研讨dis(no)+advantage=disadvantage(n)It’sanelectriccar.Itworkswell,butitsdisadvantageisthatit’slowandcan’trunforlong.Lookatthefollowingpicturesandguessthemeaningoftheunderlinedword.缺点新知学习课堂小结当堂检测学习目标重点研讨It’samaglevtrain.Ithasnowheelsbutitrunsveryfast.Itcanrunmorethanfourhundredkmperhour.磁悬浮列车新知学习课堂小结当堂检测学习目标重点研讨n.技术Chinaisoneofthefirstcountriesintheworldtousebiogas

technology.沼气It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.electric(adj.)—electricity(n.)

新知学习课堂小结当堂检测学习目标重点研讨电动的新知学习课堂小结当堂检测学习目标重点研讨1aReadandunderstand.

Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergytoproducepower.However,nuclearpowercanbeverydangerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.Thisrenewableenergyisusedinpeople’severydaylives.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.新知学习课堂小结当堂检测学习目标重点研讨Electricvehiclesweredevelopedinthe1990s.OnApril11,2010,anewkindofelectricvehiclenamed“Yezi”wasshowninthe2010ShanghaiWorldExpo.Itproduceselectricityfromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalsosave

energy.It’stoosmalltoholdmanypeople,butlargermodelswillbedevelopedinthenearfuture.InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeoplejust7minutestogototheairport30kmaway.Thetraincanreachatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergy-efficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalsteelrailways.新知学习课堂小结当堂检测学习目标重点研讨Lookatthepictures.Doyouknowwhattheyare?Choosetherightpictureforeachparagraph.paragraph2

paragraph3Paragraph4新知学习课堂小结当堂检测学习目标重点研讨1bRead1aandmatchthewordswiththepicturesonPage48.A.acidrainB.nuclearenergyC.biogasACB()()()新知学习课堂小结当堂检测学习目标重点研讨1cRead1aagainandcompletethetable.ItemAdvantageDisadvantagebiogas

electricvehicle

maglevtrain

renewablelongprocessandhighcostforitsbuildingsaveenergy,nopollutiontoosmalltoholdmanypeople

quiet,quick,energy-efficient,nopollution

muchmoreexpensivethantraditionalsteelrailways新知学习课堂小结当堂检测学习目标重点研讨2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheuseofoneenergysource.

Thesun,wind,wavesandheatfromdeepintheearthareenergysources.Theywillneverrunoutsotheyarecalledrenewablesources.In2011,about16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyear.

新知学习课堂小结当堂检测学习目标重点研讨Windcanproduceelectricityinmanyplaces.Peopleusesunlighttoproduceelectricity.Seawavesareusedforproducingelectricity.Peopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.新知学习课堂小结当堂检测学习目标重点研讨2bTakenotesonyourdiscussionandwriteapassagewiththem.

Youmaybeginlikethis:Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago…新知学习课堂小结当堂检测学习目标重点研讨Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago.Wecanuseittowarmthehouseinthewinter,toheatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenearfuture.Asisknowntous,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandnon-polluting.Besides,itdoesnoharmtoournature.Sowe’dbetteruseitasmuchaspossible.Youcanwriteitlikethis:新知学习课堂小结当堂检测学习目标重点研讨Keypoints1.Somecountriesusenuclearenergytoproducepower.

usesth.todosth./

usesth.fordoing.使用某物来做某事eg:Peopleusedbambootowritewithinthepast.在过去人们使用竹子写字。Peopleusewindforproducingelectricity.人们用风发电。新知学习课堂小结当堂检测学习目标重点研讨2.Itskeydisadvantageisthattheprocessrequiresalongtime(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”。

eg:Thefloorrequireswashing.地板该洗了。

*berequiredtodosth.表示主语必须（被要求）……eg:Studentsarerequiredtoattendclasses.

学生必须按规定上课。新知学习课堂小结当堂检测学习目标重点研讨3.It’stoosmalltoholdmanypeople,butthelargermodelswillbedevelopedinthenearfuture.它太小，不能承载太多的人，但在不久的将来，更大的车型将会被研制出来。①holdv.容纳，包含；eg:Theplaneholdsabout300passengers.这架飞机可容纳大约300名乘客。②holdv.拿着，抓住，抱住；eg:Hewasholdingthebabyinhisarms.他抱着婴儿。③holdv.召开，举行，进行（比赛，会议等）；eg:TheOlympicGamesareheldeveryfouryears.奥运会每四年举行一次。④holdv.(打电话时）等待，不挂断；eg:Holdon,please!请稍等。新知学习课堂小结当堂检测学习目标重点研讨4.Thetraincanreachatopspeedof431kmperhour.

这辆火车最高速度能达到431公里每小时。

reachaspeedof+具体速度——达到某个速度拓展：ataspeedof+具体速度——以某个速度,可用high,low,full等形容词修饰speed。eg:Beijing-Tianjintrainreachesaspeedof300kmperhour.

北京至天津线火车时速达到每小时300千米。新知学习课堂小结当堂检测学习目标重点研讨1.用某物做某事2.被用来做某事3.过去常常做某事4.适应于做某事5.全世界6.寻找Keyphrasesusesthtodo/fordoingsthbeusedtodo/fordoingsthusedtodosthbe/getusedtodoingsthallover/aroundtheworldlookfor7.达到……的数量8.……之一9.太……而不能10.一种……11.不但……而且12.在不久的将来13.达到……的速度