人教高二英语选修8 unit2 cloning Using language(共27张PPT).ppt

1、Unit 2 cloning using language The Return of the Dinosaurs?Answer the following questions:Have you ever seen the film Jurassic Park?Do people like this film?What animals do you see in the film?Are they real dinosaurs?Do you think it is possible to clone dinosaurs?Warming upListen to the text and then

2、 tell the following sentences are true or false.(Students can discuss in pairs.)1.Scientists are still experimenting with cloning mammals because they think it can make money.2.The animals that have disappeared from the earth,like dinosaurs,can be brought back to life through cloning.3.If we can clo

3、ne any extinct animals,we should let them live in a zoo.FFF1.The film Jurassic Park is popular because _.A.people are interested in the subject of cloning B.all the actors are dinosaurs C.it was directed by a scientist who clones dinosaurs D.it proves very interestingChoose the best answers.2.Which

4、of the following is true?_A.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.3.From the first paragraph,how many kinds of animals have been cloned since 1950s?Seven:frogs,mice,cows,sheep,calves,cats

5、,dog.Give some reasons why it is either impossible or unsuitable to clone extinct animals.Reason 1:Reason 2:Reason 3:You need perfect DNAThere is not enough diversity for cloned animals to overcome new diseases.It would be unfair to clone any extinct animals if they would have to live in a zoo.Advan

6、tage of diversity Disadvantage of diversityDiversity in a group of cloned animalsIf there is a new illness,some of these animals may die,but others will survive and passed on the ability to resist that disease to their children.They would all have the same arrangement of genes and so they might all

7、die of the same disease.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 increase its numbers.The zoo is not a natural environment for a wild anim

8、al.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.merely a dreamConclusion:The chance of dinosaurs returning to the earth is _.1.We can infer from the text tha

9、t _.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 only survive 10000 year2.What is the authors attitude in this passage?A.Subjective.B.Positive.C.Favorable.D.Objective.3.What is the main

10、 idea of this passage?A.It proves the return of the dinosaurs.B.It shows the history of cloning dinosaurs.C.“The return of the dinosaurs”is impossible or unsuitable.D.“The return of the dinosaurs”is an excited story.1.The popularity of films such as Jurassic Park,in which a scientist clones several

11、kinds of extinct dinosaurs,proves how the idea struck a mixture of fear and excitement into peoples hearts.引导定语从句引导宾语从句在侏罗纪公园这部电影中,有一位科学家克隆了好几种不同的绝种恐龙。类似这样的电影很受欢迎,证明了这一想法使人们感到既兴奋又恐惧。strike fear/excitement into ones heart使某人感到恐惧/兴奋 strike sb.down 摧垮，使病倒，使丧命(1)Her words _ so that he was sleepless all

12、night long,afraid of being killed unexpectedly some day.(2)He _ by cancer when he was only thirty.struck fear into his heartwas struck downMany people who had seen the film were afraid to go to the forest when they remembered the scenes _ people were eaten by the tiger.A.in which B.by which C.which

13、D.that解析：题意为“很多看过这部电影的人，当回想到人被老虎吃掉的情景时，就不敢去森林里了”。本题考查“介词+关系代词”引导的定语从句。“people were eaten by the tiger”是定语从句，先行词the scenes在定语从句中作地点状语，表示”在这种情景中”，所以选AA2.From time to time people suggest that extinct animals like dinosaurs,can possibly be brought back to life through cloning.人们时常设想灭绝的动物,例如恐龙,有可能通过克隆技术使

14、它们复活。from time to time 有时,间或,偶尔,=occasionally,now and then bring back to life 使复生，使复活 come to oneself 苏醒过来(1)It is said that the mysterious medicine can _(能使死人复活).(2)He finally _(苏醒过来了)after three days sleep.bring the dead back to lifecame to himself3.Diversity in a group means having animals with t

15、heir 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。作定语以不同的方式mean doing sth.意味着.have sth.done 让某人做某事4.Others will survive and pass on the ability to resist that disease to the next generation.其他的将存活下来并传递其后代抵抗这种病的能力。pass on.to.将.传给.resistvt.抵制,抵抗resistance n.抵抗,反抗;抵抗力;耐性resistant adj.抵抗的;防的；

16、resist sth./doing sth.抵制某事/做某事cant resist sth./doing sth.禁不住某事/做某事resist the enemy/temptation 抵抗敌人/抵制诱惑根据汉字提示完成句子。1)We are determined to stay and _(抵抗敌人).2)Tom _(忍不住开玩笑)about his strange hairstyle.3)Quite a few people in power _ _(抵制不住金钱的诱惑)and disobey the law.cant resist the temptation of moneyresi

17、st the enemycouldnt resist playing jokesbase on/upon 以为基础,依据其结构为:base sth.on/uponsth.is based on/upon5.Based on what we know now,you cannot clone animals that have been extinct longer than 10000 years.据我们现在所知,绝种一万年以上的动物不能克隆。过去分词短语作状语_by a greater demand for vegetables,farmers have built more green h

18、ouses.A.Driven B.Being drivenC.To drive D.Having driven解析：题意为“由于受到更大的蔬菜量需求的推动，农民修建了更多的温室”。根据by应用被动，排除C和D。根据后边的完成时态，驱动力已经有了，不是正在推动，故选A。Acast down pay off in favour offrom time to time be bound to1.She was _ by her husbands death.2.My uncle comes to have dinner with us _.3.He has been working so hard at his lessons,so he_ pass the exam this time.4.Finally his efforts _.5.All of them were strongly _ the project.Fill in the blanks with the words given.cast downfrom time to timeis bound topaid offin favour of