1、Unit 3,Computers,calculate universal simplify sum operator logical logically,vt. 計(jì)算 adj. 普遍的；宇宙的 vt. 簡化 n. 總數(shù)；算術(shù)題；金額 n.（電腦）操作員； 接線員 adj. 合邏輯的；合情理的 adv. 邏輯上；合邏輯地； 有條理地,fromon as a result sothat,從時(shí)起 結(jié)果 如此以致于,Expressions preview,WHO AM I?,Reading,I am very old now. I was born in China. Many people used

2、 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 (謎語),I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating through the Internet. However, I am not a PC, because Im s

3、mall enough for you to take me with you. Do you know who I am?,laptop,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 am?,calculator,robot,Im a machine that works automatically. I can do a wide variety of tasks,

4、 especially suitable for doing jobs too boring, difficult, or dangerous for human beings. Do you know who I am?,Can you give us the English names of a computer components (組件)? Tips: 1. We can use a computer to 2. It is made up of some parts, such as,keyboard 鍵盤,mouse 鼠標(biāo),monitor 顯示器,screen 屏幕,speake

5、r 音響,host 主機(jī),components of a computer,screen keyboard mouse monitor DVD-ROM hard disk,1. the part of the computer that looks like a television 2. the part of the monitor that you look at 3. something you use to click on things (files, etc.) 4. the part of the computer that you type on 5. the part of

6、 a computer that stores information 6. the part of computer that we can put a CD in,Match,PDA,abacus,calculator,huge computer,PC,laptop,Whats next?,Can you tell the development of computers?,robot,Skimming Now listen to the tape carefully and then get the general idea .,1. Who is the speaker in this

7、 story?,2. Whats the main idea of this 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,Reading Comprehension I,Look at these inventions. Can you put them in an order ac

8、cording to the time when they appeared?,( ) analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine,1,2,3,4,5,6,Skimming,Reading Comprehension II,Careful reading,These changes only became possible as my memory improved. Since the 1970s many new applications have

9、been found for me. Over time I have been changed quite a lot.,Para 1:,Para 2:,Para 3:,Match the main ideas and the paragraphs.,Scanning to get detail information,1. Who was the first person to make the earliest computer? A. Alan Turing. B. Charles Babbage. C. Charles Turing. D. Alan Babbage. 2. When

10、 was the “universal machine” built? A. In 1822. B. In 1642. C. In 1936. D. In 1970.,Scanning,Reading Comprehension IV,3. When was the computer the biggest? A. In 1642. B. In 1936. C. In the 1940s. D. In the 1970s. 4. How old is the computer? A. About 170 years old. B. About 270 years old. C. About 3

11、70 years old D. About 470 years old.,Scanning,5. Which of the following is in the right order of time? The computer was connected with other computers. b. Alan Turing wrote a book about the computer. c. The computer has been sent to explore the Moon and Mars. d. The computer began to simplify diffic

12、ult sums. A. a. b. c. d. B. b. c. a. d. C. d. a. c. b. D. d. b. a. c.,Scanning,The computer began as a calculating machine,1936,The computer grew rapidly both in size and in brainpower.,Finish the timeline below.,Scanning,Reading Comprehension V,1960s,Computers were used in offices and homes.,Comput

13、ers connect people all over the world together.,The computer had grown as large as a room.,The history of computers,the second generation (1956-1963),the third generation (1964-1971),the fourth generation(1971- ),the first generation (1945-1956),Quiz,Retell the text by filling the following blanks.,

14、I began as a _ _ in 1642 in France. In 1822 I was built as an _ _. Then in 1936 Alan Turing wrote a book and built a _ _. As the years have gone by, I have been made _ and _ but I became _ and _.,Quiz I,In the _ they gave me a family connected by a _. Now people call it the _. I have been used in _

15、and _ since the 1970s. So I became PC. Since my _ I have truly been built to serve the _ _.,I began as a _ _ in 1642 in France. In 1822 I was built as an _ _. Then in 1936 Alan Turing wrote a book and built a _ _. As the years have gone by, I have been made _ and _ but I became _ and _.,calculating machine,analytical machine,machine,Answer:,universal,smaller,smaller,cleverer,quicker,In the _ they gave me a family connected by a _. Now people call it the _. I have been used in _ and _ since the 1970s. So I became PC. Since my _ I have t