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1、Warming up,computer,Computer is a programmable electronic device that can store, retrieve, and process data.,Do you know the history of computer? Talk about it with your partner. Lets do some riddles to know about it.,Lets guess!,I am very old now. I was born in China. Many people used me for calcul
2、ating in the past, but now I am a bit lonely because they dont like me. Do you know who I am?,abacus,Riddles (谜语),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,I am very big. Scientists use me t
3、o solve some mathematical problems.,huge computer,Do you know who I am?,PC Personal Computer,Im a small, relatively inexpensive computer designed for an individual user. Im based on the microprocessor technology. At home, people use me to surf the Internet and play games. Do you know who I am?,I can
4、 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 small enough for you to carry anywhere. Do you know who I am?,laptop,PDA Personal Digital Assistant,I am so small in size that I can fit i
5、n your hand. I usually have a small screen slightly bigger than a digital phone, but 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?,robot,Im a machine that works automatically. I can do a wide vari
6、ety of tasks, especially suitable for doing jobs too boring, difficult, or dangerous for human beings. Do you know who I am?,Whats next?,Can you put them in an order according to the time when they appeared?,【1】,【2】,【3】,【4】,【5】,【6】,【7】,superconducting high-speed computer 高速超导计算机,laser computer 激光计算机
7、,molecular computer 分子计算机,quantum computer 量子计算机,DNA computer,neural computer 神经元计算机,biological computer 生物计算机,What do you think will be the next development?,High performance computer in the future,Do you know in what ways computers are used today? Work out a list and compare it with your partner.,
8、search for information,see movies,shop online,play games on the internet,chat with friends,download music and films,listen to music,read books and magazines,Computers have brought great changes to our life. Can you live without computers?,Skimming for general idea,1. Who is the speaker in this story
9、?,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.,Answer the following questions.,Scanning for specific information,The computer began as a calcul
10、ating machine.,1936,The computer grew rapidly both in size and in brainpower.,(1) Read the passage and find the development of computers. Finish the table below.,P19 1,1. My real father was Charles Babbage, who wrote a book and built me in 1936. 2. I began as a calculating machine in Japan in 1642.
11、3. After 1936, I grew rapidly both in size and in brainpower. 4. As time went by, I was made bigger.,Alan Turing,France,smaller,(3),1. When was the “universal machine” built? A. In 1822. B. In 1642. C. In 1936. D. In 1970. 2. When was the computer the biggest? A. In 1642. B. In 1936. C. In the 1940s
12、. D. In the 1970s.,(4) Choose the best answer.,3. 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 diffi
13、cult sums. A. a. b. c. d. B. b. c. a. d. C. d. a. c. b. D. d. b. a. c.,(5) Answer the questions.,1. What makes computers become smaller?,2. What applications have been found for computers since the 1970s?,Computers memory has been improved. First it was stored in tubes, then on transistors and later on very small chips.,The computers have been put into robots and used to make mobile phones as well as help with medical operations. They also have been put into space rockets and sent to explore the Moon and Mars.,
