人教版高中英语选修8 Unit 2《Cloning》word教案.docx

1、人教版高中英语选修8 Unit 2Cloningword教案Unit 2Cloning【美文阅读】Pandas can be saved by cloning?从1998年中国科学院动物研究所首席科学家、动物克隆与受精生物学学科带头人陈大元首次正式提出克隆大熊猫到现在，整整16年过去了，陈老仍然执著于此。然而保护大熊猫，究竟要不要通过克隆的方式呢？China has been exploring every possible means of saving giant pandas，one of the worlds most endangered species，from becoming

2、extinct，even if it means resorting to(诉诸) cloning them.Chen Dayuan，a senior scientist who specializes in cloning at the Institute of Zoology in the Chinese Academy of Sciences，introduced the idea of performing cloning techniques on giant pandas in 1998.Using initial funding of 100,000 yuan，Chen succ

3、essfully produced blastocysts(胚泡) by transplanting the somatic nucleus from sample pandas into the egg cells of rabbits.The move was considered as one of the 10 biggest achievements of science and technology in 1999.It won an award of 6 million yuan and further funding of 5 million yuan for the proj

4、ect from the Ministry of Science and Technology.At first，two embryos were created from a surrogate mother(代母) cat who became pregnant after being injected with a blastocyst，but the experiment was abandoned after the cat died.Chen and his team then experimented with surrogacy on black bears.After thr

5、ee years of effort，a black bear became pregnant and the shape of a fetus(胎儿) could be seen on an ultrasound scan(超声波扫描检查)However，the research was stopped in 2005 because the fetus did not completely develop before the projects deadline.“Those who are against cloning have made their voices heard thro

6、ughout the research project on cloning giant pandas.Some people believe cloning goes against nature，but it is actually a pioneering technology.If successful，it is a way to save endangered animals，”Chen said.Some scientists take a different view.“While I agree that research on cloning is meaningful，i

7、t is inappropriate to use giant pandas in this type of experiment.The number of pandas is limited and human beings have yet to master knowledge about pandas pregnancy.Cloning would do little to save the species，”said Wang Dajun，a researcher at the School of Life Sciences，Peking University.In respons

8、e，Chen said that he would continue his research.【诱思导学】1Do you think pandas can be saved by cloning？Why?_【答案】省略2Why are some scientists against cloning pandas?_【答案】Because they think cloning go against nature.Period Previewing(教师用书独具)教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，为下一堂课对课文的全面

9、理解起到一个铺垫作用。教学地位本单元的中心话题是“克隆”。克隆意为无性繁殖，克隆技术即是无性繁殖技术。1997年英国罗斯林研究所试验成功的克隆羊多莉是首次利用体细胞克隆成功的，它在生物工程史上揭开了新的一页。本单元内容具体涉及“什么是克隆”、“克隆羊多莉是如何诞生的”、“克隆的利弊”等。语言技能和语言知识都是围绕“克隆”这一中心话题设计的。目的在于让他们了解有关克隆的知识和科普文章的一些基本特征和写作方法，自己尝试写简单的辩论报告。(教师用书独具)新课导入建议可以通过让学生看和讨论教材P10的“热身”(Warming Up)的图片：克隆羊多莉、人类的双胞胎、草莓的自然无性繁殖以及插枝繁殖的植物

10、等导入新课。要求学生分组讨论，了解两种不同的克隆：自然克隆和人工克隆。为下面的阅读做好铺垫。 老师要尽量给学生自主学习的时间和空间，通过自学、自做、自悟、自助等方式，让学生更好地体会和理解文章的内容 。 教学流程设计导入新课。学生阅读“美文阅读”与“诱思导学”(见学案第19页)。学生就“话题美文导读”进行讨论，统一答案。学生再次阅读课文(课本第 1112页)并完成“语篇理解”(见学案第20页)。师生共同讨论并统一答案。让学生快速阅读课文，(见课本第1112页)并完成“篇章结构”(见学案第20页)。学生共同讨论，并让学生发表各自见解，最后统一答案。学生再次仔细阅读课文，(课本第 1112页)进行

11、深度理解，并完成“课文缩写”(见学案第20页)。老师指导学生讨论，共同找出答案。让学生根据所给出的表格进行自我评估(见学案第21页)。学生讨论，并让学生代表发表他们讨论得出的答案。老师予以更正。让学生完成“知识初探”部分(见学案第21页)。老师布置作业，让学生看课本并完成课本第12页1、2、3题，预习学案Period (见学案第21页), 写一篇简单的辩论报告类作文。.篇章结构阅读P1112的Reading部分，然后完成下列表格Cloning：Where is it leading us？ParagraphMain ideaContents1The definition(定义) of clon

12、ingCloning is a way of making an 1._ another animal or plant.It happens both in plants and animals. 2The major 2._ of cloning Firstly，gardeners use it to produce commercial 3._.Secondly，it is valuable for research on new plant species and for medical research on animals.3The problems of Dolly At fir

13、st she seemed to develop normally.Then came 4._ that she had become seriously ill，which 5._ cloning scientists.Dolly lived only six and a half years，6._ the life of the original sheep.Cloning scientists wondered now to overcome the problems. 4The effect of DollyIts appearance raised a storm of 7._ a

14、nd had a great impact on media and public imagination.It also occured to people that they can cure serious illnesses and even to produce 8._ using cloning.5 Peoples reaction tocloningGovernment became 9._ .Some began to 10._ research into human cloning.Scientists still wonder whether cloning will he

15、lp or harm us and where it is leading us.【答案】1.exact copy of2.uses3.quantities of plants4the disturbing news5.cast down6.half the length of7.objections8.human beings9.nervous and more conservative10.forbid.语篇理解阅读P1112的Reading部分，选择最佳答案1What are people cloning now?AThey are cloning books and machines.

16、BThey are cloning humans and animals.CThey are cloning trees，crops，grass，flowers，etc.，as well as animals.2It can be inferred from the passage that a cloned animal_.Ausually lives as long as the original oneBusually lives longer than the original oneCusually lives shorter than the original one3The cl

17、oning of Dolly the sheep succeeded because _.Ait is easier to clone a sheep than other animalsBthe scientists were determined and worked hard with patienceCit is more useful than plants4From the passage，we can see _.ADollys original sheep lived 13 yearsBDollys baby was also a cloned oneCnewspapers d

18、id not disclose cloning sheep5We can use the skill of cloning to_.Abring about global peaceBcreate other famous scientistsCcure some special diseases【答案】15C C B A C.课文缩写Cloning is a way of making an 1._ copy of another animal or plant.Cloning plants is 2._ while cloning animals is very complicated.I

19、t is a difficult task to 3._.Many attempts to clone mammals failed.But at last the determination and patience of scientists 4._ in 1996 with a 5._the cloning of Dolly the sheep.Dollys appearance raised storm of 6._ and had a great 7._ on the 8._ and public imagination.Altogether Dolly lived six and

20、a half years，half the length of the original sheep.At present some countries began to reform their legal systems and 9._ research into human cloning，but other countries like China and the UK，continued to 10._ evidence of the abundant medical aid that cloning could provide.【答案】1.exact2.straightforwar

21、d3.undertake4paid off5.breakthrough6.objections7.impact8media9.forbade/forbad10.accumulate.词义搭配1undertake Ato promise or agree to do something2breakthrough Ban important new discovery in something you are studying3altogether Cconnected with the principles of what is right and wrong behaviour，and wit

22、h the difference between good and evil4object Dto get something that you want5obtain Ecompletely6moral Fto gradually get more and more of sth.over a period of time7forbid Gto order sb.not to do sth.or order that sth.must not be done8accumulate Hto say that you disagree with， disapprove of or oppose

23、sth.【答案】1.A2.B3.E4.H5.D6.C7.G8.F.短语填空in favour of；pay off；object to；from time to time；cast down；differ from；have an impact on1Jack is really having a hard timehe cant earn enough money to _ the debts.2At the UN conference，China strongly _punishing the Arabic countries by force.3The people are much _

24、 by many years of civil war.4Fashion designers are always changing styles of dress _ to make more money from ladies.5Are you _ the governments plan to build more railway lines?【答案】1.pay off2.objected to3.cast down4.from time to time5.in favour of.句型背诵1Cloning plants is straightforward while_ cloning

25、 animals is very complicated.克隆植物简单，但克隆动物就很复杂了。2The fact that_she_seemed_to_develop_normally was very encouraging.看来多莉是在正常地成长着，这很令人鼓舞。3Then_came the disturbing news that Dolly had become seriously ill.接着传来了多莉病重的坏消息。4Although at present human egg cells and embryos needed for cloning research are_diff

26、icult_to_obtain，newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions.尽管目前供克隆研究的人类的卵细胞和胚胎很难获得，报纸报道说，有些邪恶头目希望把自己克隆出来以实现他们的野心。Period Warming Up & Reading(教师用书独具)教学目标(1)熟记学案中所列出的单词和短语。(2)通过学案中所给出的重点单词和重点短语的学习，让学生能够正确理解和使用这些单词和短语，能够运用这些词语造句。(3)通过对这些词汇的理解能够更深层次的理解课文，并通过课文加

27、深对这些词汇的理解，更加熟练地运用这些词汇。(4)通过对本课文的理解，要求学生根据自己的想象描述一下未来的克隆技术会为我们人类克隆出一个怎样的世界，会有哪些利弊等。让学生就此展开讨论，并写一个简单的辩论报告。以提高学生的书面表达能力。教学地位单词和短语是构成句子的最小单位，在语言学习中起着至关重要的作用，所以理解和正确运用英语单词和短语是英语学习的重点所在。(教师用书独具)新课导入建议It is known that cloning is a controversial topic which will become more important as the years pass.Diffe

28、rent people have different opinions about it.Now I want to ask xxx to say something about cloning and discuss some of the issues associated with cloning.教学流程设计老师检查上节课所布置的作业，检查学生对学案预习的情况。导入新课。让学生就“互动探究”(见学案第21页)进行讨论，让学生各自发表自己的见解，然后让各个讨论组派代表汇报各自讨论结果。让学生再次阅读课文，(课本第1112页)以加深对所学单词与短语的理解。老师针对难点和重点词汇进行讲解，并

29、补充学案中所遗漏的重点词汇，补充一些必要的练习。让学生针对各自不同的意见展开讨论，然后老师给出详细正确答案。让学生完成“自我评估”(学案第26页)。布置作业。让学生完成课本第13页第1、2、3题，“课时作业”和预习Period (见学案第27页)。1differ vi.不同；相异Think about how they differ. (教材P10)想一想他们如何不同。Men differ in habits and appearance.人的相貌和习惯均不相同。He and his wife differ constantly.他与妻子常有分歧。differ from sb./sth.与某人

30、/某物不同differ from /with sb. about/on sth.关于某事与某人有异议differ in.在方面不同make a difference有影响，很重要the difference between A and BA与B之间的不同be different from sb.in.在方面不同于某人He differs from me on clothes.在衣着方面他不同于我。The two sides in the dispute still differ with each other over the question of pay.争执的双方在报酬问题上仍各持己见。Can you tell the difference between them?你能说出他们的区别吗？City life is very different from country life.都市生活和乡村生活是非常不同的。differ from/differ wit