高中英语 Unit2 Cloning Using language课件 新人教版选修8.ppt

1、Using Language,resist merely decoration unable zebra,vt. 抵抗；对抗 adv. 仅；只；不过 n. 装饰 adj. 不能的；不会的 n. 斑马,argument aloud reasonable obtain,n. 论据；论点；争论 adv. 大声地；出声地 adj. 合情理的；讲道理 的；公道的 vt. 获得；得到,from time to time bring back to life pay off,不时；偶尔 使复生 取得好结果；取得 成功； 赔清,克隆的进展,蛙: 1962年，未成功 绵羊: 1996年，多利（Dolly） 猕猴

2、: 2000年1月，Tetra，雌性 猪: 2000年3月，5只苏格兰PPL小猪 牛: 2001年，Alpha和Beta，雄性 猫: 2001年底，CopyCat (CC), 雌性,小鼠: 2002年 兔: 2003年3-4月分别在法国和朝鲜独 立地实现； 骡: 2003年5月，爱达荷Gem，雄性； 6月，犹他先锋，雄性 鹿: 2003年，Dewey 马: 2003年，Prometea，雌性 狗: 2005年，韩国首尔大学，史纳比,Please enjoy some pictures about dinosaurs.,霸王龙,剑龙stegosaurs,角龙 ceratopsids,雷龙 bro

3、ntosaurus,翼龙pterodactyl,Reading THE RETURN OF THE DINOSAURS?,1. The writer of the text_ A. is excited by the possibility of cloning fierce and extinct animals B. believes that extinct animals can be brought back to life by cloning,Read the passage and then choose the correct answers to the below que

4、stions.,C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs D. dreams of dinosaurs returning to the earth,2. The film Jurassic Park is popular because_. people are interested in the subject of cloning B. all the actors are dinosaurs C. it was directed by a scientist who clo

5、nes dinosaurs D. it proves very interesting,3.Which of the following is true?_ Mice were cloned in 1981. B. Dolly the sheep was the first cloned animal. C. The name of the cloned cow is “Bison” D. China was successful in cloning mammals.,4. The reasons why a group of cloned animals all die of the sa

6、me illness do NOT include_. A. they have the same arrangement of genes B. there isnt enough diversity in the group for it to overcome illnesses C. the illness is a new one D. their arrangement of genes can not resist that new disease,5. We can infer from the text that_ A. scientists are experimentin

7、g to clone dinosaurs B. dinosaurs will never return to the earth C. cloned animals will only live in the zoo D. the DNA of dinosaurs can only survive 10 000 year,Read the passage again and answer the questions. 1.Why shouldnt you clone an extinct animal unless there is enough diversity in the group?

8、,There will not be enough genetic variation in the group to be able to resist new illnesses.,2. Why is it wrong to clone an extinct animal if it would have to live in a zoo?,It is not a good idea to clone an animal that would have to live in a zoo because it is not a suitable habitat to develop and

9、increase its numbers. The zoo is not a natural environment for a wild animal.,3. Why cant you clone the DNA of animals that have been extinct longer than 10,000 years?,The DNA of animals more than 10,000 years old is not suitable for cloning, for it cant survive so long.,Discussion,May the best anim

10、al win! Now in pairs discuss which extinct animals described below are worth restoring by means of cloning. Choose one and use the information to help you argue why this animal should be restored to the earth.,Auroch (1627),Large wild cattle; long horns and hair; hair good for making into clothes; h

11、orn can be used for decoration; need grasslands.,Dodo bird (1755),Unable to fly; friendly and not harmful; large eggs and tasty meat that could be developed for food; needs hot climate.,Great Auk (1844),Very large bird that cannot fly；lives by and in the sea; feathers do not absorb water; useful for

12、 protecting clothes from water.,Quagga (1883),Skin looks like a zebra; can be used for decoration; meat very tasty; needs warm climate.,Language points,1. From time to time people suggest that the animals that have disappeared from the earth, like dinosaurs, can possibly be brought back to life thro

13、ugh cloning. 人们时常设想从地球上消失的动物,例如恐龙,有可能通过克隆技术使它们复活。,from time to time 有时,间或,偶尔, = occasionally , now and then. He comes here from time to time.他时常到这儿来。 The car manufacturers changed the car models from time to time. 汽车制造商不时地改变车的型号。,将下列句子译成英语 (1) 他有时变得很没有道理。 _ _ (2) 他们有时吵架。 _,He becomes quite unreasona

14、ble from,They quarrel from time to time.,time to time.,bring back to life 使复生 They used artificial respiration to bring the swimmer back to life.他们用人工呼吸使游泳者苏醒过来。 Anyway he was dead , we could not bring him back to life.横竖他死了，我们不能使他复生。,bring back to health 恢复健康,2. .but others will survive and pass on

15、 the ability to resist that disease to their children. .其他的将存活下来并传递给其后代抵抗这种病的能力。,resist 作及物动词主要有三个义项: 抵抗, 对抗; 抵挡, 防止; (与cannot, could not连用) 无法抗拒, 无法抵挡。,They resisted the attack. 他们抵抗那次攻击。 She resisted being carried off. 她拒绝被带走。 She could not resist the temptation. 她无法抗拒那项诱惑。,1. The popularity of th

16、e film Jurassic Park, in which a scientist clones several different kinds of extinct dinosaurs, proves how interested ordinary people are in the subject.,长难句分析,电影侏罗纪公园的欢迎证实了普通人对这一话题是多么感兴趣,在该电影中一位科学家克隆了几种不同的恐龙。 in which引导定语从句, how引导宾语从句。,2. It is useless to clone an animal if there is not enough dive

17、rsity in the group for it to overcome illnesses. 该群中如果没有足够的多样性使它克服疾病,克隆动物就没有用。,当动词不定式、动名词或从句作主语时, 通常把它们放在谓语之后,而用it作句子的形式主语。,3. Diversity in a group means having animals with their genes arranged in different ways. 群中的多样性指的是拥有基因排列方式不同的动物。 with their genes arranged in different ways作定语,in different wa

18、ys 以不同的方式。,Listening and Speaking,Is cloning cruel? Listen and see whether you agree with Xiao Qing or Mary. 1. Read these statements before listening. Tick those that you hear. Cloning will bring dead pets to life. There were 627 experiments before Dolly was successfully clone., Cloning may produce

19、 medicine or even organs of a human body to cure serious illnesses. Dolly was “middle-aged” when she was born. So your grandmother would be able to start her life all over again and live to an old age.,2. Listen to the tape again and then work with a partner to fill in the chart.,1 cruel to animals,

20、1 scientists are doing a wonderful job,2 makes them do unnatural things,2 may bring back extinct animals,3 it is a “dead end”,3 problems because it is a new science,4 clone born at age of “mother”,4 scientists need encouragement,5 weakens the species,5 it may provide medicine for illnesses,Listening

21、 Text,IS CLONING CRUEL? Xiao Qing and Mary Brown are discussing whether cloning is cruel to the animals. MB: Xiao Qing, do you think cloning is cruel?,XQ: What do you mean by that? The scientists are doing a wonderful job and soon they may be able to bring back extinct animals or even peoples favour

22、ite pets back to life. MB: Yes, Qing, I know. But doesnt that seem strange to you? Is it worth it? It took 276 experiments before,Dolly was successfully cloned. Think of all those live cells and eggs that died in order for Dolly to be born. I dont approve of that! XQ: But Mary, be reasonable. Isnt i

23、t always like that with a new science? This is the way you learn to do,things better. Its just that this one deals with living things. MB: I suppose so but they make the animals do unnatural things. One poor cow was made to give birth to a bison. What was the poor creature to think when is saw its b

24、aby?,XQ: I dont quite understand why so many people are against cloning. I think the scientists need a little encouragement. They have done some amazing things and think of the benefits. Producing animals that are an exact copy of the original may help medical science produce,medicines or even organ

25、s for serious illnesses. MB: Yes, Ive heard all that. I agree with it but I dont agree with the methods. I dont think cloning is good for the animals. XQ: Why not?,MB: Well, I think its a dead end. Dolly the sheep was “middle-aged” when she was born because her DNA came from a middle-aged “mother”. Cloning your grandmother would mean the new baby started life as an old lady!,XQ: Are you sure? I never thought of that! MB: And it also weakens the species. Clones mean the