2015-2016学年 选修8 Unit 2 Period 1 Reading.pptx

1、 2 3 1、掌握本课重点单词，短语和句式。 2、让学生阅读理解什么是克隆、多莉羊的诞生与死亡以及由 此引发的争论。 3、进一步训练学生阅读、找读、细读、归纳要点、对比等阅 读技巧，把握篇章中心内容，获取关键信息，并能分析、判断 作者对克隆的态度和见解。 本课首先向学生图片展示20世纪的十大顶级发明，来引出本 单元的话题-克隆。随后是一段有关克隆的电影截频用以激发 学生的阅读兴趣。然后展示草莓无性繁殖、插值繁殖、人类双 胞胎、克隆羊多莉等图片，要求学生小组讨论，了解两种不同 的克隆：自然克隆与人工克隆。接下来是本课的重点环节： Reading.首先进行快读，归纳段落大意以及文章的大意，并回 答

2、相应的问题。随后是细读，布置相应的任务，训练学生查找 具体信息的能力。并对文章主要环节：多莉羊的诞生深入阅读。 细读过程中分别采用独立阅读、小组讨论等方法。最后，对文 章进行总结填空，加深学生对全文的把握。最后对文章的长难 句进行分析。Homework：分析讨论克隆技术的利与弊。 本节阅读课采用课前讨论热身，快读，细读，小组讨论等方 法，使学生了解克隆这门生物技术。并进一步引发学生对克隆 动物健康的关注以及对克隆技术发展前景的再思考。 Top10 inventions in 20th century: NO. 10 Atomic bomb NO. 9 Space shuttle NO. 8 T

3、elevision NO. 7 Artificial satellite NO. 6 Aspirin Airliner NO. 5 NO. 4 Personal computer NO. 3 Mobilephone NO. 2 Internet NO. 1 Cloning Cloning The plant produces its own runners. Take cuttings from growing plants to make new ones. A stem They are identical in appearance, and are produced from the

4、same original egg. The twins It is the exact copy of another sheep and the first cloned mammal. Dolly the sheep 没没爹没娘的多莉爹没娘的多莉羊羊 Cloning is a way of making an exact copy of another animal or plant.It can be divided into natural clone and man-made clone. A natural clone is one that occurs in nature a

5、nd a man- made clone is one that is procured through human intervention(介入，干预介入，干预). Main idea of each para.(Scanning) _ The birth and death of Dolly. _Scientists are confused about the future of clone. _ What is the cloning. _Controversy brought by Dolly . _ Two major uses of cloning. 2 3 1 4 5 1.T

6、he main idea of the text is_ A. animal cloning is very valuable and can benefit the world. B. animal cloning could be misused by bad people so it must be forbidden. C. animal cloning is well developed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure ab

7、out its future. Choose the right answer according to the text. 2. The cloning of Dolly the sheep succeeded because_. A. its easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience C. the scientists were rewarded and got lots of money D. many other a

8、ttempts to clone mammals failed 3. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 12 推理判断推理判断 4. We can infer from the last three paragraphs that _. A. The normal development of Dolly had no effect on the cloning of other species. B. Dollys serious disease and

9、 final death disturbed the whole world. C. Dolly successfully cloned a new lamb with the help of cloning scientists. D. There were arguments about animals about animal cloning and concerns about the future of cloning. 5. As for the cloning procedure of Dolly the sheep, all of the following are true

10、EXCEPT _. A. the lamb is the clone of the donated cell from sheep B B. electricity is needed C. female sheep B provides an egg cell D. three female sheep are used 6. From the last paragraph we know that _. A. cloning will come to an end because of objections B. cloned human beings will be produced i

11、n the near future C. many countries will use cloning in a wise way D. all the research into human cloning will be forbidden “True“ or“False“ 1. Cloning means making a copy of an animal or a plant. 2. Gardeners can make a lot of money by cloning plants. 3. Cloning animals is as complicated as cloning

12、 plants. F T F 4. Dolly the sheep was the first successful clone of a mammal. 5. Natural clones happen in animals as well as in plants. T T The procedure works of Dolly the sheep Female sheep A provides an egg cell. The nucleus is removed from the egg cell. The egg cell is ready for a new nucleus. F

13、emale sheep B provides a somatic cell The nucleus is taken out of the somatic cell. The nucleus and the egg cell are joined The cell divides and grows into an embryo. The embryo is put into female sheep C. Dolly the sheep is created. Try to find out the detailed information and fill in the blanks. D

14、efinition 2 major uses of cloning Cloning procedure The first successful animal clone It is a way of _ of another animal and plant. 1)to produce _quantities of plants . 2)It is valuable for research on new _and medical research on _. Cloning plants is _ while cloning of animals is _ The cloning of_,

15、 a _ in cloning tech. making an exact copy commercial plants species animals straightforward complicated Dolly the sheep breakthrough objections The problems of Dolly the sheep It opened everybodys eyes to the possibility of using cloning to cure _and even produce _. human beings normally natural 6

16、original imagination serious illnesses media a lamb Encouraging news : It seemed to develop _ and produced _in a _way. Disturbing news: It lived for _ years, half the length of the life of the _ sheep. Its appearance raised a storm of _ and had a great impact on the _ and public_. The effect of the

17、Dolly sheep Arguments on cloning Evil leaders hope to clone _. Religious leaders raised _ questions. Many governments _ research into human cloning. Some countries continued to _evidence of the abundant medical aid. moral forbade themselves accumulate Challenge yourself 1. In the second paragraph, t

18、he word “straightforward” means _. A. uncomplicated B. honest C. frank D. difficult 2. It suddenly opened everybodys eyes to the possibility of using cloning to cure serious illness and even to produce human beings. (translation) 它它突然打开了人们的眼界，看到了有可能利用克隆技突然打开了人们的眼界，看到了有可能利用克隆技 术来治疗重病，甚至还有可能克隆出人类术来治疗重

19、病，甚至还有可能克隆出人类。 Challenge yourself 3. In an unfortunate way , the mice and Dolly sheep had no choice but to die young. No one imagined that this would happen and so no one could prevent it.(Find a sentence which has the similar meaning) Sadly the same arbitrary fate affected other species, such as cl

20、oned mice. 4.What is the writing style? A. Expositive （说明性的）（说明性的） B.Descriptive C. Argumentative （议论性的）（议论性的） D. Narrative Discussion The writers reaction towards cloning is_ A. Positive B. Negative C. neutral Learning tips: The passage is written in the expositive style. That is to say the text is

21、 in the third person and in factual and formal language. It gives different points of view and does not try to persuade the reader to make up his/her own mind. conclusion Clone is a way of making an exact_ of another animal or plant. Cloning have two _ uses. Firstly, gardeners use it all the time to

22、 produce _quantities. Secondly, it is valuable for research on new plant _and for medical research on animals. But through the _and death of Dolly, cloning has a lot of problems. On the other hand, we know cloning is controversial in some countries for _and _reasons. copy major commercial species birth moral religious Homework 1. Read the passage again. 2. Discuss the advantages and disadvantages of cloning.