1 Unit 3 Computers

2 Well-known sayings Words are but wind, but seeing is believing 耳听为虚，眼见为实 We only live once, but if we do it right, once is enough 年华没虚度，一生也足矣 Nothing is too difficult if you put your heart into it 世上无难事，只要肯攀登

3 The technology develops so quickly that many new things appear in human being’s life. Let me show some to you: Warming up

4 notebook computer Internet HI-TECH mp3 player radio

5 HI-TECH mobile phone TV set refrigerator air-conditioner

6 plane car digital camera robot

7 student 1 student 2 student 3 Do you have a computer? What do you do with the computer? How often do you surf on net? Four students in a group: Warming up

8 The development of the calculating machine:

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10 An abacus is an ancient tool used for counting. The abacus has been in existence in China since the second century BC until now, although the oldest counting boards have been found in fourth century BC Rome.

11 The first electronic counting machine in continental Europe. Designed under the leadership of Academician S.A. Lebedev (Kyiv, Ukrainian National Academy of Sciences, ). It was built to solve some mathematical Problems. The first tasks were solved on January, 4, But it is too big.

12 A calculator is a new calculating machine which can solve a large number of mathematical problems.

13 A PC is a personal computer which can solve all kinds of problems and is used widely now.

14 A notebook computer is a kind of useful computer which can be taken conveniently like a notebook.

15 Discussion What they have in common? Use some of the following expressions in your discussion: I think that… In my opinion… I believe that… What’s your reason? Why do you think so?

16 mouse monitor do the word processing keyboard Pre-reading

17 What can you do with the mouse? What ’ s the use of the keyboard? What does a monitor of a computer do? What helps to control the computer? What can we do on the computer? Pre-reading

18 What can we do on a computer and through the Internet?

19 Computer and Internet type my homework draw pictures play games communicate with my friends. gather information for my lessons listen to music watch movies ……

20 How have computers changed our life?

21 Homework: 1.Surf the Internet to find more information about how computer influence people’s lives and present it to your classmates in the next class. 2.Preview the reading passage

22 TIPS Some words on the Internet: netizen 网民 Net surf 网络漫游 computer virus 计算机 病毒 cyber 计算机的，网络的 browse 浏览 cyberspace 网络空间 scroll 滚动显屏 access charge 接入费 cursor 光标 BBS 公告板服务 backer 黑客 chat room 聊天室 click 点击

23 Happy Time D: I have some good news for you and some bad news P: Tell me the bad news first, doctor D: I am going to cut off your legs P: And what’s the good news D: The man in the next bed wants to buy your shoes

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