1、Unit 3 Computers,Guessing,Do you know who I am?,warming up,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 use me often now. Do you know who I am?,abacus,I am very small. I can be used for calculating. In China, a l
2、ot of students use me when solving mathematical problems. Who am I?,calculator,计算器,I am very big. Scientists use me to solve some mathematical problems. Do you know who I am?,huge computer 巨型计算机,I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communica
3、ting 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?,notebook computer (laptop)笔记本电脑,What do they have in common?,1.They can be used for calculating. 2.They can deal with maths problems. 3.They are useful and helpful.,robot,art
4、ificial intelligence,Nowadays computers play a very important role in our daily life.Do you know about computers？,keyboard 键盘,mouse 鼠标,monitor 显示器,screen 屏幕,speaker 音响,host 主机,Components of a Computer,Look at these pictures and guess what they are.,a calculating machine,analytical machine,universal
5、machine,solve difficult mathematical problems,computer as large as a room,Look at these inventions. Can you put them in an order according to the time when they appeared? After reading the passage, check to see if you are right.,( ) analytical machine ( ) laptop( ) calculating machine ( ) robot( ) P
6、C ( ) universal machine,Reading,WHO AM I?,Skimming to get general ideas,While-reading(1),1. Who is the speaker “I”in this story?“ I ” am a _ .,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. Compute
7、rs may replace human beings.,computer,3. The text is written in an order of _ .,time,While-reading(1):skimming,Scanning to get detailed information,While-reading(2-3) careful-reading,timeline,1642: 1822: 1936: 1940s: 1960s: 1970s:,The computer began as a calculating machine.,The Analytical Machine w
8、as 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 offices and homes.,The first family of computers was connected by a network.,Many new applications have been found for computers.,Now:,Computers connec
9、t people all over the world together.,While -reading(2):scanning,(Universal machine),Look at these inventions. Can you put them in an order according to the time when they appeared? After reading the passage, check to see if you are right.,( ) analytical machine ( ) laptop( ) calculating machine ( )
10、 robot( ) PC ( ) universal machine,1,2,3,4,5,6,PDA,abacus,calculator,huge computer,PC,laptop,Whats next?,robot,The history of computers,Topic Sentence,While-reading(3):careful reading,Read the passage again carefully and finish Ex. 2 on P19 in the student book.,Over time I have been changed quite a
11、lot.,calculating machine,analytical machine,universal machine,PC,laptop,Why could I “think” logically and produce an answer quicker than any person?Because I was programmed by an operator who used cards with holes.,While-reading(3):,Those changes only became possible as my memory improved,tubes,tran
12、sistors,chips,network,World Wide Web,2.I totally changed my shape, because,my memory was first stored in tubes, then on transistors and later on very,small chips.,I totally changed my shape！,While-reading(3):,Since the 1970s many new applications have been found for me.,communications,finance,trade,
13、robots,mobile phones,medical operations,space rockets,provide a life of high quality,3. Many new applications have been found for me, such as,communications,finance/ trade/ robots/ mobile,Rockets.,phones/ medical operations/ space,4. (translation) Over time my memory has developed so much that, like
14、 an elephant, I never forget anything I have been told.随着时间的推移，我的记忆力发展的如此之快，就像一头大象，我从来不会忘记 告诉我的任何事情。,While-reading(3):,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 bro
15、ught into peoples homes in the 1970s. 4. Since my birth I have been built to take the place of the human race.,True or False,Quiz 1,5. 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 197
16、0s many new applications have been found for me.,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 was the “universal machine” built?A. In 1822. B. In 1642. C. In 1936. D. In 1970.,Quiz 2,3. When was the computer
17、 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 370 years oldD. About 470 years old.,5. Which of the following is in the right order of time?The computer was connected with other computers. b. Al
18、an 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 difficult sums.A. a. b. c. d. B. b. c. a. d. C. d. a. c. b. D. d. b. a. c.,Summary of the reading text,I began as a _ _ in 1642 in France. In 1822 I was built as a
19、n_ _. 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,universal,smaller,smaller,cleverer,quicker,In the _ they gave me a family connected by a _. Now people call it the Int
20、ernet. 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,human race,offices,homes,birth,palmtop,smaller desktops,convenient laptop,What are todays smaller computers like?,the iPad,What are advantages and disadvantages of computers nowadays?,Advantageslisten to the musicsee films watch news communicate with friendsbuy things on line,Disadvantages play computer games too much chat（聊天） on the Internet too much little time to study,“低头族”,Homework,Review the text Finish Ex. 1/2 on Page 20.,Thank you for listening!,
