（优质课件）人教版高中英语选修8 Unit 2《Cloning》Using language优秀课件.ppt(课件中无音视频)(课件中不含音视频素材)

1、Using LanguageWords preview resist merely decoration unable zebra vt.抵抗；对抗抵抗；对抗 adv.仅；只；不过仅；只；不过 n.装饰装饰 adj.不能的；不会的不能的；不会的 n.斑马斑马 argument aloud reasonable obtainn.论据；论点；争论论据；论点；争论 adv.大声地；出声地大声地；出声地adj.合情理的；讲道理合情理的；讲道理 的；公道的的；公道的vt.获得；得到获得；得到Words previewExpressions preview from time to time bring

2、back to life pay off不时；偶尔不时；偶尔使复生使复生取得好结果；取得取得好结果；取得成功；成功；赔清赔清克隆的进展克隆的进展 蛙蛙:1962年，未成功年，未成功 绵羊绵羊:1996年，多利（年，多利（Dolly）猕猴猕猴:2000年年1月，月，Tetra，雌性，雌性 猪猪:2000年年3月，月，5只苏格兰只苏格兰PPL小猪小猪牛牛:2001年，年，Alpha和和Beta，雄性，雄性 猫猫:2001年底，年底，CopyCat(CC),雌性雌性小鼠小鼠:2002年年 兔兔:2003年年3-4月分别在法国和朝鲜独月分别在法国和朝鲜独 立地实现；立地实现；骡骡:2003年年5月，爱

3、达荷月，爱达荷Gem，雄性；，雄性；6月，犹他先锋，雄性月，犹他先锋，雄性 鹿鹿:2003年，年，Dewey 马马:2003年，年，Prometea，雌性，雌性 狗狗:2005年，韩国首尔大学，史纳比年，韩国首尔大学，史纳比 Please enjoy some pictures about dinosaurs.霸王龙霸王龙剑龙剑龙stegosaurs角龙角龙 ceratopsids雷龙雷龙 brontosaurus翼龙翼龙pterodactyl Reading THE RETURN OF THE DINOSAURS?1.The writer of the text_ A.is excited

4、by the possibility of cloning fierce and extinct animals B.believes that extinct animals can be brought back to life by cloningRead the passage and then choose the correct answers to the below questions.C.thinks it impossible or unsuitable to clone extinct animals like dinosaurs D.dreams of dinosaur

5、s returning to the earth2.The film Jurassic Park is popular because_.A.people are interested in the subject of cloning B.all the actors are dinosaursC.it was directed by a scientist who clones dinosaursD.it proves very interesting3.Which of the following is true?_A.Mice were cloned in 1981.B.Dolly t

6、he 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 same illness do NOT include_.A.they have the same arrangement of genes B.there isnt enough diversity in the group for it to

7、overcome illnesses C.the illness is a new one D.their arrangement of genes can not resist that new disease5.We can infer from the text that_ A.scientists are experimenting to clone dinosaursB.dinosaurs will never return to the earthC.cloned animals will only live in the zooD.the DNA of dinosaurs can

8、 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?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 i

9、f 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 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 lo

10、nger 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.May the best animal 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

11、 why this animal should be restored to the earth.Auroch(1627)Large wild cattle;long horns and hair;hair good for making into clothes;horn 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

12、hot climate.Very large bird that cannot fly；lives by and in the sea;feathers do not absorb water;useful for protecting clothes from water.Quagga(1883)Skin looks like a zebra;can be used for decoration;meat very tasty;needs warm climate.1.From time to time people suggest that the animals that have di

13、sappeared from the earth,like dinosaurs,can possibly be brought back to life through cloning.人们时常设想从地球上消失的动物人们时常设想从地球上消失的动物,例如恐龙例如恐龙,有可能通过克隆技术使它有可能通过克隆技术使它们复活。们复活。from time to time 有时有时,间或间或,偶尔偶尔,=occasionally,now and then.He comes here from time to time.他时常到这儿来。他时常到这儿来。The car manufacturers changed

14、 the car models from time to time.汽车制造商不时地改变车的型号。汽车制造商不时地改变车的型号。将下列句子译成英语将下列句子译成英语(1)他有时变得很没有道理。他有时变得很没有道理。_ _(2)他们有时吵架。他们有时吵架。_He becomes quite unreasonable fromThey quarrel from time to time.time to time.bring back to life 使复生使复生They used artificial respiration to bring the swimmer back to life.他们

15、用人工呼吸使游泳者苏醒过来。他们用人工呼吸使游泳者苏醒过来。Anyway he was dead,we could not bringhim back to life.横竖他死了，我们不能使他复生。横竖他死了，我们不能使他复生。bring back to health 恢复健康恢复健康2.but others will survive and pass on the ability to resist that disease to their children.其他的将存活下来并传递给其其他的将存活下来并传递给其后代抵抗这种病的能力。后代抵抗这种病的能力。resist 作及物动词主要有三个义

16、项作及物动词主要有三个义项:抵抗抵抗,对抗对抗;抵挡抵挡,防止防止;(与与cannot,could not连用连用)无法抗无法抗拒拒,无法抵挡。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 the film Jurassic Park,in which a scientist clones several different kinds of extinct

17、 dinosaurs,proves how interested ordinary people are in the subject.长难句分析长难句分析 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 diversity in the group for it to overcome illnesses.该群中如果没有足够的多样性使它克该群中如果没有足够的多样性使它克服疾病服疾

18、病,克隆动物就没有用。克隆动物就没有用。当动词不定式、动名词或从句作主语当动词不定式、动名词或从句作主语时时,通常把它们放在谓语之后通常把它们放在谓语之后,而用而用it作作句子的形式主语。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 ways 以不同的方式。Is cloning crue

19、l?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 medicine or even organs of a human body to cure serious

20、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.Marys ideas about cloningXiao Qings ideas about cloning1 cruel to animals1 scientis

21、ts are doing a wonderful job2 makes them do unnatural things 2 may bring back extinct animals3 it is a“dead end”3 problems because it is a new scienceMarys ideas about cloningXiao Qings ideas about cloning4 clone born at age of“mother”4 scientists need encouragement5 weakens the species5 it may prov

22、ide medicine for illnessesListening TextIS 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 ani

23、mals or even peoples favourite 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 rea

24、sonable.Isnt it 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 s

25、aw its baby?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 or

26、gans 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

27、 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 there is less variety in the species and so illnesses will become more common and the animals may die out.XQ:Oh dear!And that was just what you and

28、I were trying to avoid.I see I shall have to look at this whole cloning question again!Whose ideas do you agree with?Get ready to have a class discussion.Think about the reasons for your point of view.Use your own ideas as well as those in the text.These words and phrases on page 18 may be useful fo

29、r you during the discussion：Thats a good idea.I cannot accept your argument becauseI support because No,I cant agree with becauseI agree withbecause.How can you believe that?Your argument has convinced me becauseI would like to agree with you butI dont care for your ideas because No,that is not reasonable because.Thats a great idea!Your ideas sound very encouraging to me.感谢各位老师！祝：身体健康 万事如意