Book8-Unit2-Reading-(经典).ppt

Cloning In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.Dolly the sheepIts the most famous sheep in the world. She was c_ while the others were born n_. It is the c_ of another sheep.lonedaturallyopyWhat can you see in the picture?a s_ plant producing runners.trawberryWho cut the stem off the plant?A gardener. And the gardener is going to put it into a pot to produce another plant. What do you know about twins?There are twins of the same sex and those of different sexes. The twins here are identical in sex and appearance.What is the difference among them ?Natural cloneMan-made clonecloneDolly the sheepDolly and the Father of Dolly IanwilmutIn 1996, the famous sheep “Dolly” was cloned successfullyPre-readingIs cloning a good thing or a bad thing?Prediction What do you think the article is about by reading this headline?What is the main idea of the passage?The passage tells us that animal cloning _ and scientists are not sure about its_.argumentsfuture 1. The _ of cloning 2. _ of cloning. 3.The _ of Dolly. 4. The _ of Dolly. 5. _ of application to clone human beings.two major uses problems effect the main idea of each paragraphdefinitionControversyargumentsCareful readingCareful reading 1.How do gardeners clone plants? 2.What two major uses do cloning have? 3.What problems do Dolly have? 4.Whats the effect of Dolly? 5.Why is it forbidden to clone human beings?1 The writers reaction towards cloning is _.A. Positive B. Negative C. neutral2 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. NarrativeLook at these pictures, and discuss this question with your partner.Is cloning people a good thing or a bad thing?Discussion Is cloning good or bad for us ? Advantages Disadvantages Group 1 and 2 Group 3 and 4DiscussionAdvantages of cloningAdvantages of cloning 1.to produce commercial quantities of plants 2.be useful for research on new plant species 3.be useful for research on animals. 4.to help cure serious illnesses in humans.Disadvantages of cloningDisadvantages of cloning 1.may develop the illnesses of older animals. 2.may die younger than the donor animals. 3.Evil leaders may want to clone themselves to attain their ambitions. 4.may cause some moral and religious problems.