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1、【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？,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 yu
2、an for the project 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 in jected with a blastocyst，but the experiment was abandoned after the cat died.,Chen and his team then experimented with surrogacy on bla
3、ck bears.After three 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 thei
4、r voices heard throughout 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 clo
5、ning is meaningful，it 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 U
6、niversity. In response，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.,教师用书独具演示,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
7、背景知识，为下一堂课对课文的全面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。,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
8、性繁殖以及插枝繁殖的植物等导入新课。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 。,演示结束,.篇章结构 阅读P1112的Reading部分，然后完成下列表格,【答案】 1.exact copy of 2.uses 3.quantities of plants 4the disturbing news 5.cast down 6.half the length of 7.objections 8.human beings 9.nervous and m
9、ore conservative 10.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. 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_. Ausuall
10、y lives as long as the original one Busually lives longer than the original one Cusually lives shorter than the original one 3The cloning of Dolly the sheep succeeded because _. Ait is easier to clone a sheep than other animals Bthe scientists were determined and worked hard with patience Cit is mor
11、e useful than plants,4From the passage，we can see _. ADollys original sheep lived 13 years BDollys baby was also a cloned one Cnewspapers did not disclose cloning sheep 5We can use the skill of cloning to_. Abring about global peace Bcreate other famous scientists Ccure some special diseases 【答案】 15
12、 C 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.It 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 cl
13、oning 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 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，bu
14、t other countries like China and the UK，continued to 10._ evidence of the abundant medical aid that cloning could provide. 【答案】 1.exact 2.straightforward 3.undertake 4paid off 5.breakthrough 6.objections 7.impact 8media 9.forbade/forbad 10.accumulate,.短语填空 in favour of；pay off；object to；from time to
15、 time；cast down；differ from；have an impact on 1Jack 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 _ 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 off 2.objected to 3.cast down 4.from time to time 5.in favour of,.句型背诵 1Cloning plants is straightforward whi
