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1、Unit 3,Computers,人教版高一英语,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 (谜语),I can be used for calculating. Besides, I can also be used for watching DVD, sending e-
2、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 phone,
3、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 am?,c
4、alculator,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 know who
5、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?,PDA,abacus,calculator,huge computer,PC,laptop,Whats next?,Can you tell
6、the development of computers?,robot,A computer is a machine which keeps knowledge in its memory and does work on that knowledge. This knowledge is kept in symbols; it is called data. A computer usually has a monitor to show results. However, some computers can speak. These computers can be used for
7、voice mail.,What is a computer?,WHO AM I?,Reading,Skimming to get general ideas,Complete the chart below.,Reading Comprehension,Over time I have been changed quite a lot.,1 calculating machine,5 laptop,2 analytical machine,3 universal machine,4 PC,These changes only became possible as my memory impr
8、oved.,1 tubes,2 transistors,3 chips,4 network,5 World Wide Web,Since the 1970s many new applications have been found for me.,1 communications,2 finance,3 trade,4 robots,5 mobile phones,6 medical operations,7 space rockets,8 providing a life of high quality,Careful reading,The computer began as a cal
9、culating machine,1936,The computer grew rapidly both in size and in brainpower.,Finish the timeline below.,Reading Comprehension,1960s,Computers were used in offices and homes.,Computers connect people all over the world together.,The computer had grown as large as a room.,Scanning to get detail inf
10、ormation,1. My real father was Charles Babbage, who wrote a book and built me in 1936. 2. After I got my new transistors in the 1960s, I became smaller but cleverer and quicker. 3. I was brought into peoples homes in the 1970s. 4. Since my birth I have been built to take the place of the human race.
11、,True or False,Scanning,Reading Comprehension III,5. I began as a calculating machine in Japan in 1642. 6. In 1936, I grew rapidly both in size and in brainpower. 7. As time went by, I was made bigger. 8. Since the 1970s many new applications have been found for me.,Scanning,1. Who was the first per
12、son to make the earliest computer? A. Alan Turing. B. Charles Babbage. C. Charles Turing. D. Alan Babbage. 2. When 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
13、the 1940s. D. In the 1970s. 4. How old is the computer? A. About 170 years old. B. About 270 years old. C. About 370 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
14、the computer. c. The computer has been sent to explore the Moon and Mars. d. The computer began to simplify difficult sums. A. a. b. c. d. B. b. c. a. d. C. d. a. c. b. D. d. b. a. c.,Scanning,Quiz,I began as a _ _ in 1642 in France. In 1822 I was built as an _ _. Then in 1936 Alan Turing wrote a bo
15、ok and built a _ _. As the years have gone by, I have been made _ and _ but I became _ and _.,calculating machine,analytical machine,machine,Retell the text by filling the following blanks.,universal,smaller,smaller,cleverer,quicker,In the _ they gave me a family connected by a _. Now people call it
16、 the _. I have been used in _ and _ since the 1970s. So I became PC. Since my _ I have truly been built to serve the _ _.,network,1960s,Internet,human,race,offices,homes,birth,Brainstorm a list of things that you, your school and your family use computers for. Think about what you would have to do if you could not use computers any more.,Discussion,Homework,1. Read the text after class and look for more information about the development of the computer and its applications. 2.Retell the passage.
