谭霞 高二英语Unit_2_Cloning-Reading[课件.ppt

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1、Unit2cloningReadingWhichonesarenaturalclones?Whichonesareman-made?Howdotheydiffer.WarmingupTwinsTheyarebornnaturallyandidenticalinsexandappearance.Growingnewplantsman-madeclone富贵竹插枝即活LuckybambooThegardenershouldcuttheplant,thenthecuttingproduceanothernewp

2、lant.AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.第一只克隆宠物猫克隆马及其“母亲兼姐姐”2002年4月十六日美国第一头克隆牛“艾米”产下牛犊喜作妈咪克隆的荧光小猪(左)和正常小猪(右)我国成功繁殖克隆兔体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。Naturalcloneisonethatoccursinanaturalformofcloningwith

3、outhumanhelp.Man-madecloneisonethatproducedthroughhumanintervention(介入).DollythesheepShewasclonedwhiletheotherswerebornnaturally.Inotherword,Dollywasa______sheep.clonedHowdoesDollydifferfromothersheep?man-madeclonePre-reading–addyourquestionstothelistQue

4、stionlistaboutcloningWhatisaclone?Howisacloneproduced?Whatbenefitscanhumansgainfromcloning?Whatproblemsmayarisewhenhumansarecloned?5.…6.…共119页14●重点单词1．differvi.不同；相异→differentadj.不同的→differencen．不同，差异2．twinn．双胞胎之一；孪生儿之一adj.成对的；成双的3．straightforwardadj.简单的；

5、直接的；坦率的4．undertakevt.着手；从事；承担→undertook(过去式)→undertaken(过去分词)共119页155．breakthroughn．突破6．castvt.扔；投；掷→cast/cast(过去式/过去分词)7．objectvi.反对；不赞成→objectionn．不赞成；反对；异议→objectiveadj.真实的；客观的；无偏见的8．obtainvt.获得；赢得9．attainvt.获得；达到(水平、年龄、状况等)共119页1610．forbidvt.禁止；不准→fo

6、rbade(过去式)→forbidden(过去分词)11．accumulatevt.积累；聚积12．owevt.欠(账、钱、人情等)；归功于……13．retirevi.退休；离开→retirementn．退休14．bothervt.打扰vi.操心n．烦扰共119页17●重点短语1．payoff得到好结果；取得成功；偿清2．castdown沮丧；不愉快3．objectto反对4．infavourof赞成；支持5．owe...to...把……归功于……6．(be)boundto(to)．..一定或注定(做)

7、……Skimming（略读）:matchthemainideawitheachparagraph（段落大意连连看）A.Twomajorusesandtheprocedureofcloning.B.Cloningisawayofmakinganexactcopyofanotheranimalorplant.C.TheeffectofDollythesheep.D.Itisforbiddentoclonehumanbeings.E.Theproblemofdollythesheep.Para.1Para.2P

8、ara.3Para.4Para.5________________________________________Cloningisawayofmakinganexactcopyofanotheranimalandplant.Whatiscloning?Cloninghappensbothin______andin_______.Theycanbeclonedby________and_______.plantsanimals