人教 版高中英语选修8Unit 2 Cloning using language2课件（共18张）

课件18张PPT。Unit2 CloningCloning:WHERE IS IT LEADING US?“克隆”一词源于“Clone”的音译，指的是人工诱导动、植物的无性繁殖过程，这门生物技术就叫克隆技术。无性繁殖是指不经过雌雄两性生殖细胞的结合，只由一个生物体产生后代的生殖方式，如：由植物的根、茎、叶等经过压条或嫁接等方式产生新个体。绵羊、猴子和牛等动物没有人工操作是不能进行无性繁殖的。 Cloning: Where is it leading us? 克隆,它将把我们引向何方? Fast ReadingWhat’s the main idea of the passage?Match the main idea with each paragraphPara 1: A. People’s attitude towards cloning. Para 2: B. The problems of Dolly. Para 3: C. The impact of Dolly. Para 4: D. Two major uses and the procedure of cloning. Para 5: E. The definition（定义）of cloning. Task 1. Look through Para 2 and answer the following questions. (1) What are the two major uses of cloning? (2) Which one is easier, to make plant clones or animal clones? Careful ReadingOne is that gardeners can use it to produce a large number of plants. The other is that it is valuable for medical research on animals.To make plant clones, because plant clones happen in a natural way, it doesn’t need much human’s effort.Task 2. Look through Para 3 and fill in the chart. more likely to develop diseasesshorter life, 6.5 years(1). Translation: On the other hand, Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination. (2). The word “controversial” in paragraph 4 probably means_____. A. complicated B. arguable C. important D. valuable Task 3. Do the following translation and word guessing.另一方面，多利羊的出现引起了一阵强烈的反对，对媒体和公众的想象力也产生了极大的影响。Task4. Do the following Tor F questions based on Paragraph 5. 1. People feared some evil leaders might use cloning to reach their goal. 2. All the research into cloning will be forbidden. 3. Religious leaders are in favor of human cloning. Debate 辩论：Are you for or against cloning? 正方反方PKSummary Cloning is a way of _____ (make) an exact copy of another animal or plant. It has two major uses. One is _____ gardeners use it to produce plants. The _____ is that it is valuable for medical research on animals. _____, the process of cloning is difficult _____ (undertake). The first successful clone, Dolly the sheep, made the whole _____ (science) world follow its progress, though it had _____ problems than the normal sheep. On the other hand, Dolly’s appearance _____ (raise) a storm of objections and had a great impact _____ the media and public imagination. Different people have different opinions on it. However, scientists still wonder _____ cloning will help or harm us and where it is leading us.makingthatotherHoweverto undertakescientificmoreraisedonwhetherHomeworkWrite a passage entitled my view on cloning.Thank you!