必修二(全)unit3-computers

1、Computers Unit 3 I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they dont like me now. Do you know who I am? abacus Riddles (Riddles (谜语谜语) ) I can be used for calculating. Besides, I can also be used for watching DVD, sendi

2、ng e-mail and communicating through the Internet. However, I am not a PC, because Im small enough for you to take me with you. Do you know who I am? laptop PDA Personal Digital Assistant I am so small in size that I can fit in your hand. I usually have a small screen usually bigger than a digital ph

3、one, however, smaller than the smallest laptop, Im a great way to store telephone numbers, access the internet, make calculations, and so on. Do you know who I am? I am very small. I can be used for calculating. In China, a lot of students use me when solving mathematical problems. Do you know who I

4、 am? calculator I am very big. Scientists use me to solve some mathematical problems. huge computer Do you know who I am? robot Im a machine that works automatically. I can do a wide variety of tasks, especially suitable for doing jobs too boring, difficult, or dangerous for human beings. Do you kno

5、w who I am? PC Personal Computer Im a small, relatively inexpensive computer designed for an individual user. Im based on the microprocessor (微处理微处理 器器)technology. At home, people use me to surf the Internet and play games. Do you know who I am? What do they have in common? an abacusa calculator a d

6、esktop a notebook computer a laptop (What do they have in common?) I think that In my opinion I believe that Whats your reason? Why do you think so? 1.They can be used for calculating. 2.They can deal with maths problems. 3.They are our friends. 4.They are useful and helpful. Discussion PDA abacus c

7、alculator huge computer PC laptop Whats next? Can you tell the development of computers? robot work for us in Mars(火星火星) Whats next? carry things work in wars (战斗战斗) 仿真机器人simulation robot entertainment 娱乐娱乐 virtual keyboards 虚拟键盘虚拟键盘 nose-top keyboard-vest What can we do by computer in the future? W

8、hat can the future computer be like? What do you think will be the next development? useful words and expressions about computer: Network网络网络 Virus病毒病毒 Download 下载下载 Up load 上传上传 Program程序程序 Website站点站点 Hacker 黑客黑客 Home page 主页主页 Password密码密码 Desk top 桌面桌面 User name 用户名用户名 Click 点击点击 Software 软件软件 H

9、ardware 硬件硬件 Home page 主页主页 keyboard 键盘键盘 mouse 鼠标鼠标 monitor 显示器显示器 screen 屏幕屏幕 speaker 音响音响 host 主机主机 components of a computer printer scanner modem main boardUSB flash dischard disc: CPU (central processing unit) Do you know in what ways computers are used today? Work out a list and compare it wit

10、h your partner. Pre-reading I search for see movies listen to music read books and magazines send emails to friends download music and films buy things on line play games on the computer draw pictures look at photographs on the computer use a computer for school work take part in chat groups Look at

11、 these inventions. Can you put them in an order according to the time when they appeared? ( ) analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine 1 2 3 4 5 6 Pre-reading II WHO AM I? Reading 1. Who is the speaker in this story? 2. Whats the main idea of this

12、passage? A. The development of computers. B. The development and use of computers. C. A machine which is simple-minded. D. Computers may replace human beings. A computer. Skimming 3. Who was the first person to invent the earliest computer? 4. Who was the next important person to design computers? C

13、harles Babbage Alan Turing 1642: 1822: 1936: 1940s: 1960s: 1970s: Now: Scanning 1: The computer began as a calculating machine. the Analytical Machine was built by Charles Babbage. The computer grew rapidly both in size and in brainpower. Computer had grown as large as a room. Computers were used in

14、 officers and homes. Computers connect people all over the world together. the first family of computers was connected to each other Complete the chart below. Para- graph 1 Para- graph 2 Para- graph 3 Topic sentence Supporting details tubescommunica- tions finance Scanning 2: Paragraph 1 Topic sente

15、nce Supporting details 1. 2. 3. 4. 5. Over time I have been changed quite a lot. laptop calculating machine analytical machine universal machine PC The development of computers: Calculating machineAnalytical machine Universal machine PC(personal computer) Laptop Internet 计算器计算器 分析机分析机 万能机万能机,通用机器通用机

16、器 Paragraph 2 Topic sentence Supporting details 1. 2. 3. 4. 5. These changes only became possible as my memory improved. tubes transistors chips network World Wide Web Paragraph 3 Topic sentence Supporting details 1. 2. 3. 4. 5. 6. 7. 8. Since the 1970s many new applications have been found for me.

17、communications financetrade robotsmobile phones medical operations space rockets providing a life of high quality DebateDebate What are advantages and disadvantages of computers? Advantages we can communicate with friends listen to the music see films 万有万有; 世界世界; 全人类全人类 Our world is but a small part

18、 of the universe. 我们的世界只是宇宙的一小部分。我们的世界只是宇宙的一小部分。 3. simplify vt to make something less complicated and therefore easier to do or understand 简化简化 The English in this story has been simplified to make it easier to understand. 这个故事里的英语被简写了，可更这个故事里的英语被简写了，可更 容易理解。容易理解。 4. logical adj. 合逻辑的；合清理的合逻辑的；合清理的

19、 a logical thinker 思想有逻辑性的人思想有逻辑性的人 a logical process 合理的程序合理的程序 logically adv. 逻辑上；逻辑上； 有条理地有条理地 He acted logically under the circumstances. 在这种情况下他做事仍然很理智。在这种情况下他做事仍然很理智。 Logically, the decision is obvious. 从逻辑上，这项决定是明显的。从逻辑上，这项决定是明显的。 5. technology technique (n.) technologist (person) technical (

20、adj.) technological (adj.) 1) This company is in great need of many _. 2) To build this machine, you must have _ability. 3) Do you know the knowledge of agricultural _. technologists technical technique 6. artificial adj. 人造的人造的; 假的假的 artificial flowers / limbs / pearls 假花假花 / 假肢假肢 / 假珍珠假珍珠 artifici

21、al intelligence 人工智能人工智能 7. intelligence noun U the ability to learn, understand and make judgments or have opinions that are based on reason. 智力；聪明智力；聪明 intelligence quotient 智商智商 an intelligence test 智力测验智力测验 an intelligence agent 情报员情报员; 谍报员谍报员 intelligent adj. 智能的；聪明的智能的；聪明的 an intelligent reade

22、r 理解力强的读者理解力强的读者 an intelligent being 有智力的动物有智力的动物 intelligent reply 巧妙的答复巧妙的答复 He is an intelligent person. 他是一位有才智的人。他是一位有才智的人。 8. solve vt. 解决；解答解决；解答 1) I cant solve the problem. 我解答不了这个难题。我解答不了这个难题。 2) Help me to solve my financial troubles. 请帮我解决经济困难请帮我解决经济困难. 3) The greatest scholar cannot so

23、lve this difficult problem. 再伟大的学者也没有再伟大的学者也没有 办法解答这个难题吧。办法解答这个难题吧。 9. fromon 从从时起时起 From then on, the prince and princess lived happily. 从那时起，王子与公主就幸福地生从那时起，王子与公主就幸福地生 活在一起活在一起。 10. as a result 结果结果 1) He didnt work hard, as a result he failed his exam. 他不用功他不用功, 结果考试不及格。结果考试不及格。 2) Five hundred jo

24、bs were axed as a result of government spending cuts. 由于政府缩减经费的缘故由于政府缩减经费的缘故, 有五百人被有五百人被 突然解雇了。突然解雇了。 3) He was late as a result of the snow. 由于大雪他迟到了。由于大雪他迟到了。 11. so that 如此如此以致于以致于 与与 tooto 句型的相互转换句型的相互转换 e.g. He is so old that he cant carry the box. He is too old to carry the box. 此结构中的此结构中的that

25、从句表示结果。从句表示结果。 The stone is so heavy that no one can lift it. 比较比较: so that 既能表结果，也能表目的。既能表结果，也能表目的。 so.that.结构的结构的so+形容词形容词/副词位于句副词位于句 首时，句子用倒装结构。首时，句子用倒装结构。 So hard does he work that he seldom goes home. 12. explore vt. 完全地完全地 in this way 用这种方法用这种方法 way 常见短语常见短语 5. arise (arose, arisen) vi. 出现；发生出

26、现；发生 1) An opportunity has arisen. 机会来了机会来了。 2) A new difficulty has arisen. 出现了新困难。出现了新困难。 3) The problem may not arise, but theres no harm in keeping our powder dry. 问题不一定会发生问题不一定会发生, 但有备无患并无害但有备无患并无害 处。处。 6. with the help of 在在的帮助下的帮助下 With the help of the teacher, I have made rapid progress in my English study