1、Unit2 CloningPeriod 3 The return of the dinosaurs 学生姓名组长签名一、教学目标1深入理解课文，掌握课文中基础知识,培养快速阅读、整体理解的能力。2自主学习，合作探究,掌握文章篇章结构，达到对文章进行深层理解的目的. 3.一课一德：加强对克隆技术发展前景的再思考。二预习案1. 旧知回顾完成下列句子的练习（1）Word came _(他们队赢了). (win）（2）We have not yet settled the question_(我们将到什么地方度假）.（ spend)（3）We have some doubt _(是否他们能准时完成任务
2、）.（task)（4）There is no doubt _(张威会守信的）.(promise)（5）The suggestion came from the chairman_(采纳新规则）.(adopt)（6）The government gave the order _(所有的房子三个星期内拆掉）.（pull)（7）I dont want to _(让你为我的问题担心）（bother)（8）You _( 没必要特地）come to my office.(bother)（9）Singing can _(使沉闷的教室充满生机）(life)（10）She has a strong power
3、_( 抵抗疾病)(resist)（11）_(很可能他们不会在)when they call（ chance）二、探究案探究 1. Fast reading Scan the text and choose the best answer according to the text .1.The writer of the text _.A.is excited by the possibility of cloning fierce and extinct animals B.believes that all the extinct animals can be brought back t
4、o life by cloningC.thinks it impossible to clone dinosaursD.dreams of dinosaurs returning to the earth2.The reasons why a group of cloned animals all die of the same illness do NOT include _.A.they have the same arrangement of genes.B.there is not enough diversity in the group for it to overcome ill
5、nessC.the illness is a new one D.their arrangement of genes can not resist that new disease 3.We can infer from the text that _A. Scientists are experimenting to clone dinosaursB. Dinosaurs will never return to the earth C. Cloned animals will only live in the zoo.D. The DNA of dinosaurs can only su
6、rvive 10,000 years 探究 2. Careful reading Read the text and then answer the following questions.1.Why shouldnt you clone an extinct animal if there isnt enough diversity in the group?_2.Why is it wrong to clone an extinct animal if it would have to live in a zoo?_探究 3. SummaryReproductive cloning is
7、intended to produce a c_1_of an existing a_2_or a plant. Reproductive cloning of animal is a_3_ for technology and farmingas well as for cloning e_4_ animals.But reproductive cloning of human beingsis specially f_5_ by law in most c_6_.Therapeutic(治疗的)cloning is to produce a healthy copy of a s_7_ persons tissue or organ for transplant in order to save the lives of those who would d_8_ without it. This t_9_ would be many times better than r_10_ on organ transplants from other people. The tissue or organ would have the sick persons original DNA.
