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1、Unit 3 Computers,A PC( personal computer),A notebook computer,Two kinds of computers widely used,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 am very small
2、. 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,Riddles(谜语):,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
3、a PC, because Im small enough for you to take me with you.,Notebook / laptop,Do you know who I am?,Riddles(谜语):,A huge computer,A PC,the history of the computer,PDA / Palmtop,Discussion,what can we use computer to do? Work out a list and compare it with your partner.,Internet,send emails,play games,
4、communicate with my friends.,gather information for my lessons,listen to music,watch movies,do shopping online,Reading,Who am I ?,How much do you know about a computer?,Pictures and words,1,2,4,3,5,6,1. monitor 2. screen 3. CD-ROM 4. mouse 5. keyboard 6. hard disk,Label each part,the main device tha
5、t a computer uses to store information.,the part of a computer that stores information,1.modem,2.scanner,3.printer,4.chips,5.CPU,5,3,1,2,4,device linking a computer with a telephone line.,1.Who is the teller of the story? 2.What does the passage mainly talk about?,Computer.,It talks about the histor
6、y and the applications (Use) of computers.,Fast reading,Skimming: Listen to the tape and answer the following questions.,3. In which order is the text organized?,Time,Timeline,1642:_ 1822:The Analytical Machine was made by Charles Babbage. _: _ _ 1940s: _ _:The first family of computers was connecte
7、d to each other. 1970s:_ Now:_ _,The computer began as a calculating machine,The computer grew rapidly both in size and in brainpower.,Computers were used in offices and homes,Computers connect people all over the world together.,1936,The computer had grown as large as a room.,1960s,Para. 1,Topic se
8、ntence: Supporting details:,Over time I have changed quite a lot.,calculating machine,analytical machine,universal machine,PC,laptop,a huge computer,Para. 2,Topic sentence: Supporting details: tubes,These changes only became possible as my memory improved.,transistors,chips,network,World Wide Web,in
9、telligent but lonely,Para. 3,Topic sentence: Supporting details: communications finance,Since the 1970s many new applications have been found for me.,trade,robots,mobile phones,medical operations,space rockets,providing a life of high quality,How did computer change in its size, intelligence, speed,
10、 function? And how about peoples opinion? Size: Intelligence: Speed: Function: Peoples opinion:,smaller,quicker,cleverer,dealing with , communicating with,clever & useful,calculating,simple-minded,virtual keyboards 虚拟键盘,Nose-top keyboard-vest,What can the future computer be like? What can we do by computer in the future?,Discussion,You are given a chance to design a computer for yourself. Draw a picture about it and describe(描述) what functions it has. You will be asked to introduce(介绍) your computer. (appearance &functions),Group work,
