山东省济宁市梁山现代高级中学高中英语 U2 Using language学案（无答案）新人教版选修8

Unit 2 CloningPeriod 4 Using languageTeaching Aims:1.掌握以下单词和短语的拼写和用法：strike .into ones heart、from time to time、bring back to life、in vain、resist、merely、initial2.通过运用略读和扫读两种阅读方法完成阅读任务；3.通过本节课的学习，增进学生对克隆技术的了解，培养学生对科学的兴趣。Step 1 Leading inLook at the following pictures and think which film they are from.Do you like dinosaurs? Can you see them in our real life? Why?Step 2 ReadingTask 1 Skimming (match the main idea with each paragraph)Part 1 A. Reasons for not cloningPart 2 B. Possibility of cloningPart 3 C. History of cloningPart 4 D. Conclusion(结论)Task 2 Scanning Division Detailed facts Part 1 The idea _ a mixture of fear and excitement into peoples hearts Scientists are still _ cloning mammalsPart 2 In the _ research using the embryos of mice In 1996 first clone of a _ :Dolly the sheep In 2000 cow _ a bison Part 3_ people suggest that extinct animals can be _ through cloning ,but its impossible or unsuitable(不合适的) .There are many reasons : The _ requirement(要求) is that you need perfect DNA. All efforts of cloning an animal will be _ if there is not enough diversity(多样性) in the group to overcome(战胜，克服) illnesses.It would be unfair to clone any extinct animals if they were to live in a zoo . Part 4So the chance of dinosaurs ever returning to the earth is _ a dream.Task 3 Choose the best answer：1. The film Jurassic Park is popular because _ .Part 1A. people are interested in the subject of cloning extinct animalsB. all the actors are dinosaursC. it was directed by a scientist who clones dinosaursD. it proves very interesting2. Which of the following is true?Part 2A. Mice were cloned in 1981.B. Dolly the sheep was the first cloned animal.C. The name of the cloned cow is “Bison”.D. China was successful in cloning mammals.3. The writer of the text _.Part 3A. is excited by the possibility of cloning fierce(凶猛的) and extinct animalsB. believes that extinct animals can be brought back to life by cloningC. thinks it either impossible or unsuitable to clone extinct animalsD. dreams of dinosaurs returning to the earth4. We can infer(推断) from the text that_.Part 4A. scientists are experimenting to clone dinosaursB. dinosaurs will never return to the earthC. cloned animals will only live in the zooD. the DNA of dinosaurs can only survive 10,000 yearsStep 3 Language Points1. strike vt. & vi. 打；撞击；罢工 n.罢工 教材原句.proves how the idea struck a mixture of fear and excitement into peoples hearts.strike作动词讲，还有其他含义吗？【用法归纳】2. from time to time 不时；偶尔教材原句From time to time people suggest that extinct animals like dinosaurs, can possibly be brought back to life through cloning.【不时，偶尔的多种表达方式】你还记得有关time的常用习语吗？3. bring back to life使复生，使复活教材原句From time to time people suggest that extinct animals like dinosaurs, can possibly be brought back to life through cloning.【用法指津】【bring短语归纳】4. in vain白费力气，枉费心机教材原句All efforts of cloning an animal will be in vain if there is not enough diversity in the group to overcome illnesses. 【in +adj.类介词短语】5. resist vt.抵抗；对抗教材原句.but others will survive and pass on the ability to resist that disease to the next generation.【用法指津】【单词积累】Step 4 Game TimeLets play a game. Which is the best group?Step 5 PracticeFill in the blanks with the phrases given.in vain bring back to life from time to time strike. into ones heart(s)1. Our teacher _ the importance of safety _, so we were all careful when crossing the street.2. My uncle comes to have dinner with us _.3. Im afraid that your efforts are _; he wouldnt listen to others.4. His mother died last year. He wished he could _her _ .Step 6 Homework1.Review the words and language points we have learned in this class.2.Read more articles about cloning and the natural world.Reading comprehension:Research advances over the past decade have told us that, with a little work, we human can clone just about anything we want, from frogs to monkeys and probably even ourselves! So, we can clone things, but why would we want to?Of all the reasons, cloning for medical purposes has the most potential to benefit large numbers of people. How might cloning be used in medicine?1. Cloning animal models of diseaseMuch of what researchers learn about human disease comes from studying animal models such as mice. Often, animal models are genetically engineered to carry disease-causing mutations(变异) in their genes. Creating these transgenic(转基因的)animals is a time-intensive process that requires trial-and-error and several generations of breeding(培育). Cloning technologies might reduce the time needed to make a transgenic animal model, and the result would be a population of genetically identical animals for study.2. Cloning stem cells(干细胞) for the treatment of diseasesStem cells are the bodys building blocks, 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 currently looking up cloning as a way to create certain human stem cells for the research of diseases.3. Cloning farm animals for drug productionFarm animals such as cows, sheep and goats are currently being genetically engineered to produce drugs or proteins that are useful in medicine. Just like creating animal models of disease, cloning might be a faster way to produce large herds of genetically engineered animals.1. From Purpose One, we can infer that _.Amost transgenic animals are cloneBmost animals carry engineered genesCmost transgenic animal mod