选修8第二单元学案.docxVIP

学习目标 Unit 2 Cloning Period 1 Warming up & Reading 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. Train students’ reading skills. Master the words and phrases and get a view of the structure of the passage. Help the students to learn how to describe cloning. Develop the students’ interest in science. 学前准备 课前预习具体内容： 课文中相关词汇会认会读；准备与本单元主题“克隆 ”有关的背景知识。 课前预习的具体指导与要求： 预习课文中出现的新词或短语。 填写并背诵“学习检测”栏目中的“课文缩写填词”。 学习过程 Read the passage quickly and judge the following sentences are true or false. ( ) 1. Cloning means making a copy of an animal or a plant. ( ) 2. Cloning animals is as complicated as cloning plants. ( ) 3. Natural clones happen in animals as well as in plants. ( ) 4.Dolley the sheep was the first successful clone of a mammal. ( ) 5.The cloning of Dolly the sheep succeeded because the scientists were determined and worked hard with patience. Read the passage again and choose the best answers. What is the main idea of the text? Animal cloning is very valuable and can benefit the world. Animal cloning could be misused by bad people so it must be forbidden. Which of the following statements about cloning is NOT true according to the text? Cloning is something that has been developed quite recently. Twins that look exactly the same are originally from the same egg. Cloning is used by gardeners to make more money. Animal cloning is much more difficult than plant cloning. Dolly the sheep . looked exactly like the sheep that provides the egg cell was the exact copy of the sheep that provides the nucleus looked like the sheep that gave birth to it had the characteristics of all three sheep It can be inferred from the passage that a cloned animal . usually lives as long as the original one usually lives longer than the original one usually dies earlier than the original one is usually as healthy as the original one What is people’s fear about human cloning? Which of t