【精品】人教版高中英语课件：Unit 2 Where Is It Leading Us（可编辑）.ppt

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1、人教版高中英语课件：Unit 2 Where Is It Leading UsDolly是世界上第是世界上第一例用体细胞一例用体细胞乳乳腺上皮细胞腺上皮细胞,通过通过细胞核移植技术细胞核移植技术,在复杂的人工操在复杂的人工操作下作下,得到的一只得到的一只小绵羊小绵羊。2002年年4月月16日日美国第一头克隆美国第一头克隆牛牛“艾米艾米”产下牛产下牛犊喜作妈咪。犊喜作妈咪。a cloned ox2002年年5月中月中旬成功地繁殖旬成功地繁殖了一只胚胎细了一只胚胎细胞克隆兔。胞克隆兔。a cloned rabbit克隆马及其克隆马及其“母亲兼姐姐母亲兼姐姐”a cloned horse克隆的荧光小

2、猪克隆的荧光小猪(左左)和正常小猪和正常小猪(右右)a cloned pigCloning is a way of making an exact copy of another animal or plant.What is cloning?The definition of cloning exact twin commercial straightforwardundertake breakthroughprocedure carrieradj.精确的；准确的精确的；准确的n.双胞胎之一双胞胎之一adj.成对的；成对的；成双的成双的adj.商业的；贸易的商业的；贸易的adj.简单的；坦率

3、的简单的；坦率的vt.着手；从事；承担着手；从事；承担n.突破突破n.程序；步骤；手续程序；步骤；手续n.携带者；搬运工；携带者；搬运工；运输工具运输工具Words preview castaltogether arbitrary correction object objection mediumthe media obtain vt.扔；投；掷扔；投；掷adv.总共；完全地总共；完全地adj.任意的任意的 n.改正；纠正；改正；纠正；修正修正vi.反对；不赞成反对；不赞成n.不赞成；反对；异议不赞成；反对；异议n.媒介；手段；工具媒介；手段；工具 大众传播媒体大众传播媒体vt.获得；赢得获

4、得；赢得Words preview attainmoral conservative forbid accumulatevt.获得；到达获得；到达adj.道德道德(上上)的；伦理的的；伦理的adj.保守的；守旧的保守的；守旧的vt.禁止；不准禁止；不准 vt.积累；聚积积累；聚积Words previewpay off cast downobject to in favour of 得到好结果；取得成功；得到好结果；取得成功；偿清偿清沮丧；不愉快沮丧；不愉快反对反对赞成；支持赞成；支持Expressions previewCareful readingTry to understand the

5、 text as much as possible 1.What is the main topic?1.What is the main topic?A.Cloning.B.Dolly the sheep.C.It will lead us to some places.2.What is the writing style?2.What is the writing style?A.Expositive.B.Descriptive.C.Argumentative.3.The main idea of the text is_ A.animal cloning is very valuabl

6、e 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 about its future.4.It can be inferred from the passage that a cloned a

7、nimal_.A.usually lives as long as the original oneB.usually lives longer than the original oneC.usually lives shorter than the original oneD.is usually as healthy as the original one 5.The cloning of Dolly the sheep succeeded because_.A.its easier to clone a sheep than other animals B.the scientists

8、 were determined and worked hard with patienceC.the scientists were rewarded and got lots of moneyD.many other attempts to clone mammals failed6.Which of the following is not an advantage of cloning?A.Cloning can be used for medical purposes.B.Large quantities of food can be produced by cloning.C.Cl

9、oning can help keep animals from becoming extinct.D.People can clone themselves at will.1.What is the main topic?1.What is the main topic?A.Cloning.B.Dolly the sheep.C.It will lead us to some places.2.What is the writing style?2.What is the writing style?A.Expositive.（说明性的）（说明性的）B.Descriptive（描述性的）描

10、述性的）C.Argumentative(议论性的）议论性的）Post-reading:Choose the right answer according to the text.3.The 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 Doll

11、y the sheep was born.D.animal cloning raised arguments and scientists are not sure about its future.4.It can be inferred from the passage that a cloned animal_.A.usually lives as long as the original oneB.usually lives longer than the original oneC.usually lives shorter than the original one D.is us

12、ually as healthy as the original one5.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 patienceC.the scientists were rewarded and got lots of moneyD.many other attempts to clone mammals failed6.Wh

13、ich of the following is not an advantage of cloning?A.Cloning can be used for medical purposes.B.Large quantities of food can be produced by cloning.C.Cloning can help keep animals from becoming extinct.D.People can clone themselves at will.Scanning to get detail informationscanningListen to the pas

14、sage again and answer these questions.1 What are the two major uses of cloning?2 Why is it easier to make commercial plant clones than animal clones?3 What was the first clone from an adult animal?At what age did this clone die?4 Why is cloning controversial in some countries?1 What are the two majo

15、r uses of cloning?2 Why is it easier to make commercial plant clones than animal clones?The first use is to produce commercial quantities of plants.The second is to research on new plant species and do medical research on animals.Cloning plants is straightforward,but the cloning of animals is very c

16、omplicated.3 What was the first clone from an adult animal?At what age did this clone die?4 Why is cloning controversial in some countries?The first clone from an adult animal was Dolly the sheep.She died in 2003.Cloning is controversial in some countries for moral and religious reasons.Read the pas

17、sage quickly to find the main idea of each paragraph.While-reading:Find the main idea of each paragraph1.Cloning is _ 2.Cloning has _ uses.3.The _ of Dolly.4.The _ of Dolly.5.Peoples _ towards cloning.a way of making an exact copy of another animal and plant.problemstwo majoreffectattitudeWhat do yo

18、u think is the writers point of view in this reading passage?Is it infavour of cloning or against it?I think the writer is _ because_impartial he/she does not state any personal opinion about cloning.DiscussionWrite a passage titled Is cloning good or bad?Your passage should include the following：1)Advantages of cloning 2)2)Disadvantages of cloning3)Your opinion of itHomework