高二选修8unit2Cloning.ppt

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1、1,Unit 2 Cloning,Reading,Cloning:Where is it leading us?海钢一中:王晓纯,2,Dolly the sheep,3,The procedure works like this:,4,The following statements are about cloning.Read them and decide if they are true or false.1.Cloning means making a copy of an animal or a plant.2.Gardeners can make a lot of money by

2、 cloning plants.,Exercises:,5,3.Cloning animals is as complicated as cloning plants.4.Dolly the sheep was the first successful clone of a mammal.5.Natural clones happen in animals as well as in plants.,6,单词和短语：exact breakthrough forbid cast down object to重点句子：1.The procedure is difficult to undertak

3、e,of course.2.Then came the disturbing news that Dolly had become seriously ill.,教学目标和要求(Teaching aims and demands),7,3.Altogether Dolly lived for six years,half the length of the life of the original sheep.4.On the other hand,Dollys appearance raised a storm of objections and had a great impact on

4、the media and public imagination.5.However,scientists still wonder whether cloning will help or harm us and where it is leading us.,8,1.exact:(adj.)without any error,correct 精确的；准确的eg:It was sometime last week,but I cant remember the exact.exactly 准确地 exactly speaking 2.breakthrough:(n.)the act of b

5、reaking through an obstacle or restriction 突破（障碍或限制）eg:This is a breakthrough in science.类似由动词组变化而来的名词还有：breakdown n.breakout n.breakup n.breakaway n.3.forbid vt.(forbad/forbade;forbidden)not allowed;preventforbid sb.to do sth:forbid doing sth;eg:I forbid you to do it.eg:Smoking is forbidden here.,9

6、,语言点讲解：短语,cast down:使沮丧;击倒eg:The bad news greatly cast me down.We are cast down by the failure.object:反对;讨厌;不喜欢(be against;oppose)objection n.eg:Do you object to my smoking?The boy objects to being treated as a child.,10,重点句子解析：,1.The procedure is difficult to undertake,of course.当然,程序很难进行。可改写为:It i

7、s difficult to undertake the procedure.2.(Then came the disturbing news)that Dolly had become seriously ill.接着传来了多莉病重的坏消息。3.Altogether Dolly lived for six years,half the length of the life of the original sheep.多莉总共活了6年，是一只普通羊寿命的一半。4.On the other hand,Dollys appearance raised a storm of objections a

8、nd had a great impact on the media and public imagination.另一方面，多莉的出现引起了强烈的异议，并且对媒体以及公众的想像力有巨大的影响。5.However,scientists still wonder(whether cloning will help or harm us and where it is leading us).然而,克隆是对我们有益还是有害,它到底要把我们引向何方,科学家们对此害表示疑惑。,11,raise rise,12,wonder+whether/if wh-想知道 that wonder+to do 感到奇

9、怪,惊讶 at/about n./doing,13,辅助强化练习:根据汉语提示填空,1.Smoking is(禁止)in public place.2.He(积累)a large fortune by hard work.3.It was raining but(总体上说)it was a good trip.4.He(承担)the responsibility for changes.5.He majored in(商业)education when he was in university.6.He is(坦率的)and is easy to get along with.7.The parents(反对)our idea of weekend activities while our teachers are in favour of(支持)it.8.He was(沮丧)to find he had failed the exam again.,14,The End,