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1、Unit 2 Reading,The Return of the Dinosaurs?,霸王龙 tyrannosaurus,剑龙stegosaurus,雷龙 brontosaurus,翼龙pterodactyl,Whats the main idea of the text?,Para1 explain the impossibility of cloning dinosaurs Para2 conclude that its just a dream Para3 introduce the topic of the passage,Reading Comprehension I,What i
2、s the writers attitude towards cloning the dinosaurs? A. Supportive. B. Neutral (中立的). C. Negative (否定的). D. Subjective(主观的).,Why is it either impossible or unsuitable to clone dinosaurs.? (Give some reasons .),Reason 1: Reason 2: Reason 3:,DNA Diversity Habitat,Scientists are still experimenting wi
3、th cloning mammals because they think it can make money. If we can clone any extinct animals, we should let them live in a zoo.,Reading Comprehension ,1. Why is it wrong to clone an extinct animal if it would have to live in a zoo?,Because it is not a suitable habitat to develop and increase its num
4、bers. The zoo is not a natural environment for a wild animal.,2. Why shouldnt you clone an extinct animal if there isnt enough diversity in the group?,Because there will not be enough genetic variation in the group to be able to resist new illnesses.,Summary:A good passage usually has a clear organi
5、zation or structure.,Bullet points (first, second, third) Good or useful sentence patterns (transitions 连词) The structure : the three-paragraph form (三段式),Writing,The cloning of human beings From time to time people suggest that can possibly be brought back to life through cloning. Unfortunately, wi
6、th what we know now, this is either impossible or unsuitable. Here are the reasons： Firstly, Secondly, Finally, So I think, based on what we know now, you cannot . It is merely a dream.,Whats your opinion of cloning dinosaurs?,Whats your opinion of cloning human beings?,Free Talk,Discussion,The Clon
7、ing of Human Beings,Stem cells(干细胞) are responsible for developing and repairing the body throughout life. As a result, they might be used to repair damaged or diseased organs and tissues. Researchers are looking on cloning as a way to create genetically engineered human stem cells for research and
8、medical purposes. To clone or not to clone: that is the question. Human cloning is highly controversial and raises a number of problem. Why would people want to clone humans? One important reason is to help childless couples have children. From a technical point of view, before humans are cloned, we
9、 need to have a good idea of the risks involved.,Cloning humans does give rise to some misgivings(误解), raising a number of moral problems involved. In fact, the social influences of producing humans artificially were brilliantly explored in the famous novel Brave New World by Aldous huxley, and also
10、 in the movie The Island. Human cloning is basically about creating a genetically identical copy of a previously existing person. Why would some choose to clone human beings? Well , generally, it can make couples unable to have babies have own children. Replacing a dead child is also another reason
11、why some people have expressed interest in the technology.,“当然应该克隆人,如果谁第一个掌握了这个技术,他就是我真正的、也是唯一的竞争对手。” 比尔盖茨 Natural selection and survival of the fittest. -Charles Darwin 物竞天择,适者生存。 -查尔斯达尔文,“当然应该克隆人,如果谁第一个掌握了这个技术,他就是我真正的、也是唯一的竞争对手。” 比尔盖茨 Natural selection and survival of the fittest. -Charles Darwin 物竞天择,适者生存。 -查尔斯达尔文,Finish your writing after class.,Thank you.,finish,