选修unitusinglangguagePPT学习教案

1、会计学1Answer the following questions:1.Have you ever seen the film Jurassic Park? Do people like this film? What animals do you see in the film? Are they real dinosaurs? Warming up ( 4ms )第1页/共17页第2页/共17页2.Do you like dinosaurs? Can you see them in our real life? Why?Warming up ( 4ms )第3页/共17页3. Do yo

2、u think it is possible to clone dinosaurs? If not,why? If yes, do you think thats good for human beings? Why?Warming up ( 4ms )第4页/共17页Read the text, then tell the following sentences are true or false. ( Students can discuss in pairs. )1. Scientists are still experimenting with cloning mammals beca

3、use 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.FFFReading - I scanning ( 5ms )第5页/共17页Give some reasons why it is either impossi

4、ble or unsuitable to clone extinct animalsReason 1:Reason 2:Reason 3:You need perfect DNTThere is not enough diversity for cloned animals to overcome new diseases.It would be unfair to clone any extinct animals if they would have to live in a zoo.第6页/共17页Advantage of diversity Disadvantage of divers

5、ityDiversity in a group of cloned animalsIf there is a new illness some of these animals may die ,but others will survive and passed on the ability to resist that disease to their children.They would all have the same arrangement of genes and so they might all die of the same disease.第7页/共17页Reading

6、 - II Detail reading ( 6ms )Read the text, then answer the following questions. ( Students can discuss in pairs. )1. Why shouldt you clone an extinct animal unless there is enough diversity in the group?2. Why is it wrong to clone an extinct animal if it would have to live in a zoo?3. Why cant you c

7、lone the DNA of animals that have been extinct longer than 10,000 years?第8页/共17页1. Why shouldt you clone an extinct animal unless there is enough diversity in the group? There will not be enough genetic variation (遗传变异遗传变异)in the group to be able to resist new illnesses.第9页/共17页2. Why is it wrong to

8、 clone an extinct animal if it would have to live in a zoo? It is not a good idea to clone an animal that would have to live in a zoo because it is not a suitable habitat to develop and increase its numbers.The zoo is not a natural environment for a wild animal.第10页/共17页3. Why cant you clone the DNA

9、 of animals that have been extinct longer than 10,000 years? The DNA of animals more than 10,000 years old is not suitable for cloning ,for it cant survive so long.第11页/共17页第12页/共17页Language points1.The popularity of the film proves how interested ordinary people are in the subjectpopular popularity2.a long way from doing sth.3. Do/make/carry out/perform an experiment on/in/with做.实验, 对.做实验第13页/共17页4.from time to time有时；偶尔；时常5.bringback to life 使复生6.Diversity in a group means having animals with their genes arranged in different ways.mean doing