2. Welcome back to my class

3. Unit One Making a difference

4. TASK 1 Warming-up

5. Let ’ s get to know the following scientist and their famous quotes. Imagination is more important than knowledge. It takes a very unusual mind to undertake analysis of the obvious.

6. Nothing in life is to be feared. It is only to be understood. Genius is one percent inspiration and ninety-nine percent perspiration. You cannot teach a man anything; you can only help him find it within himself.

7. Portraits of Chinese famous scientists

8. Do you know any famous scientists in China? 华罗庚 竺可桢李四光 钱学森

9. Famous people ’ s famous sayings You have to believe in yourself. That ’ s the secret of success. 人必 须相信自己，这是成功的秘诀。 —— Charles Chaplin 卓别林 I like the dreams of the future better than the history of the past. 我不缅怀过去的历史，而致 力于未来的梦想。 —— T. Jefferson 杰弗逊 （美国第 3 任总统）

10. We are here to add what we can to life, not to get what we can from it. 我们要尽可能为 生活增加一些东西，而不是从中索 取什么。 —— William Osler 奥斯勒 Anything one man can imagine, other men can make real. 但凡人能想 象到的事物，必定有人能将 它实现。 —— Jules Verne 凡尔纳

11. Victory won ’ t come to me unless I go to it. 胜利是不会向我走来的，我必须自己走向胜利。 —— M. Moore 穆尔 Life is just a series of trying to make up your mind. 生活只是由一系列下决心的努力所构成。 —— T. Fuller 富勒 All for one, one for all. 人人为我，我为人人。 —— [ 法 ] Dumas p é re 大仲马 A bird in the hand is worth two in the bush. 一鸟在手胜过两鸟在林。 —— Heywood 希伍德 Some other famous quotations from famous people

12. Time is money. 时间就是金钱。 —— Benjamin Franklin 富兰克林 Time and tide wait for no man. 时间不等人。 —— Scott 斯科特 Work while you work; play while you play. This is the way to be cheerful and gay. 工作时工作，玩乐时玩乐。依此方法做，轻松与 欢乐。 —— A. D. Stoddart 斯道达特 Early to bed and early to rise, makes a man healthy, wealthy, and wise. 早睡早起使人 健康、富裕又聪明。 —— Benjamin Franklin 富兰克林

13. TASK 2 Listening

14. TASK 3 Speaking

15. Useful expressions—p.2 That’s correct. It’s clear that… I doubt…/ That’s true./ It’s hard to say. Well, maybe, but…/ There is no doubt that… What’s your idea? / Have you thought about…?

16. Biologists 李时珍 谈家桢 Darwin F. H. Crick ** I think biology is the most impor- tant and useful science because it is essential to protecting the ecological balance and environment. People can’t live with-out living things. Fur- thermore, biology goes hand in hand with our life. If there were no science of biology, there would not be medi- cine. In a word, biology is the most important and useful.

17. chemists 卢嘉锡 Scheele 舍勒 拉瓦锡 张青莲 ** Well, maybe, but I think that chemistry is the most important and useful, because chemistry is the key to the progress of the human being. Besides, it is chemical reaction that produces many new things.

18. Physicists 钱学森 李政道 Einstein Hawking **It is hard to say. There are many physical products. And physics is widely used in many fields, such as medicine, industry and agriculture. Without physics, we could never go and explore outer space. So I think physics is the most important and useful science.

19. Mathematicians 华罗庚 苏步青 Gauss Archimedes **That’s true. But maths is the basic science. You can’t learn physics or chemistry well with- out a good knowledge of math. Maths is a tool in science and engineering. Therefore, maths is the most important and use- ful science. What’s your idea?

20. Computer scientists ** Well, there is no doubt that maths is an important and useful science. In my opinion, the most important and useful science should be computer science in our modern information society. The computer is now an indispensable ( 不可缺少的 ) tool in many fields. It can settle all kinds of problems at a high speed and can help people work easily. So I think computer science is the most important and useful science.

21. Home work 1. Preview “ Reading ” and try to understand it. 2. Language study — pp. 68-69

22. Thank you. The End