河北省唐山市开滦第二中学高中英语 Unit2 Cloning 第 4 课时导学案 新人教版选修 8Teaching aim:掌握科普文章的阅读方法Teaching key points and difficulty动名词的复合结构学习过程：Step 1: Choose the best answer after reading.1.The film Jurassic Park is popular because _____. A. people are interested in the subject of cloning B. all the actors are dinosaurs C. it was directed by a scientist who clones dinosaurs D. it proves very interesting2.The writer of the text_____ A. is excited by the possibility of cloning fierce and extinct animals B. believes that extinct animals can be brought back to life by cloningC. thinks it impossible or unsuitable to clone extinct animals like dinosaurs D. dreams of dinosaurs returning to the earth3. We can infer from the text that____ A. 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 yearStep 2: Read the text, then tell the following sentences are true or false. 1.Scientists are still experimenting with cloning mammals because they think it can make money.2.The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning.3.If we can clone any extinct animals, we should let them live in a zoo.Step 3: Give some reasons why it is either impossible or unsuitable to clone extinct animalsReason 1:Reason 2:Reason 3:Step 4: Diversity in a group of cloned animalsAdvantage of diversityDisadvantage of diversityStep 5:knowleage points1. strike11)撞；碰；撞击；碰撞She fell, striking her head against the side of the boat.她摔倒时头撞在船舷上。 2)打；击One man was struck on the head with a stick.一名男子头部遭到棍击。 3)击打，踢...
