2015-2016学年高中英语人教版选修8 UNIT 2 PERIOD 1 READING 课件.ppt

1、231、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，并回答相应的问题。随后是细读，布置相

2、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.9Space shuttleNO.8TelevisionNO.7 Artificial satel

3、liteNO.6AspirinAirlinerNO.5NO.4 Personal computerNO.3MobilephoneNO.2InternetNO.1CloningCloningA strawberry plantThe plant produces its own runners.Take cuttings from growing plants to make new ones.A stemThey are identical in appearance,and are produced from the same original egg.The twinsIt is the

4、exact copy of another sheep and the first cloned mammal.Dolly the sheep没爹没娘的多莉羊Cloning is a way of making an exact copy of another animal or plant.It can be divided intonatural clone and man-made clone.A natural clone is one that occurs in nature and a man-made clone is one that is procured through

5、human intervention(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 31451.The main idea of the text is_ A.animal cloning is very valuable and can

6、 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 about its future.Choose the right answer according to the text.2.The cloning of

7、 Dolly the sheep succeeded because_.A.its easier to clone a sheep than other animals B.the scientists were determined and worked hard with patienceC.the scientists were rewarded and got lots of moneyD.many other attempts to clone mammals failed3.The sheep that donated the somatic cell most probably

8、lived _ years.A.3 B.6 C.9 D.12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 final death disturbed the whole world.C.Dolly successfully cloned a new lamb with the help of cloning sc

9、ientists.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 EXCEPT_.A.the lamb is the clone of the donated cell from sheep BB.electricity is neededC.female sheep B provides

10、 an egg cellD.three female sheep are used6.From the last paragraph we know that _.A.cloning will come to an end because of objectionsB.cloned human beings will be produced in the near futureC.many countries will use cloning in a wise wayD.all the research into human cloning will be forbiddenTrue orF

11、alse 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 plants.FTF4.Dolly the sheep was the first successful clone of a mammal.5.Natural clones happen in animals as well as in plants.TT The proced

12、ure 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.Female sheep B provides a somatic cellThe nucleus is taken out of the somatic cell.The nucleus and the egg cell are joined The cell divides and grows into

13、 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.Definition2 major uses of cloningCloning procedureThe first successful animal cloneIt is a way of _ of another animal and plant.1)to produce _quantities of plan

14、ts.2)It is valuable for research on new _and medical research on _.Cloning plants is _ while cloning of animals is _The cloning of_,a _ in cloning tech.making an exact copycommercialplants speciesanimalsstraightforwardcomplicatedDolly the sheepbreakthroughobjectionsThe problems of Dolly the sheepIt

15、opened everybodys eyes to the possibility of using cloning to cure _and even produce _.human beingsnormallynatural6originalimaginationserious illnessesmediaa lambEncouraging news:It seemed to develop _ and produced _in a _way.Disturbing news:It lived for _ years,half the length of the life of the _

16、sheep.Its appearance raised a storm of _ and had a great impact on the _ and public_.The effect of theDolly sheepArguments 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

17、medical aid.moralforbadethemselvesaccumulateChallenge yourself1.In the second paragraph,the word“straightforward”means _.A.uncomplicated B.honest C.frank D.difficult2.It suddenly opened everybodys eyes to the possibility of using cloning to cure serious illness and even to produce human beings.(tran

18、slation)它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。Challenge yourself3.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 affec

19、tedother species,such as cloned mice.4.What is the writing style?A.Expositive （说明性的）B.Descriptive C.Argumentative （议论性的）D.NarrativeDiscussion The writers reaction towards cloning is_A.Positive B.Negative C.neutralLearning tips:The passage is written in the expositive style.That is to say the text is

20、 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.conclusionClone is a way of making an exact_ of another animal or plant.Cloning have two _ uses.Firstly,gardeners use it all the time to produ

21、ce _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.copymajorcommercialspeciesbirthmoralreligious Homework1.Read the passage again.2.Discuss the advantages and disadvantages of cloning.