unit 3 computers[上学期]

课件40张PPT。Warming And Listeningdigital cameraguessingI am a machine that you can watch a lot of different programs at home. And I have a screen with moving pictures and sounds.3. I am a machine that is a good helper in doing housework, especially washing clothes.2.I am a machine that you can use to talk to other people even in far-away place. Each of us has a number.(TV set)(telephone)(washing machine)5. I am a machine that you can use in all kinds of machines above.4. I am a machine that moves very fast on four wheels. But you must get a license if you drive me.(car)(computer)HI-TECHmobile phoneTV setrefrigeratorair-conditionernotebook computer InternetHI-TECHmp3 playerradioplanecardigital camerarobotⅠ. Show some pictures.An abacus A huge computer “银河”巨型计算机thinking1. What do they have in common? （Using some of the following expressions in your discussion.） I think that… In my opinion…
I believe that… What’ s your reason?
Why do you think so? 1.They can be used for calculating.
2.They can deal with maths problems.
3.They are our friends.
4.They are useful and helpful. ……What makes up the computer? And can you name each part ?GPU/显卡Hard diskMain board/主板CPU/处理器
(Central processing unit)NIC/内存mouseKey-boardSound boxscreenheadphoneⅣ. Read through the words in the box. Use some of them to name each part of a computer in the box. Monitor mouse keyboard hard disc floppy disc CD-ROM printer scanner modem Chips CPU floppy discchipsmonitormodemCD-ROMscannerkeyboardprinter1 A monitor is
2 The screen is
3 A keyboard is
4 A mouse is
5 A CD-ROM is
6 A hard disk is (a) the part of a computer that stores information.
(b) the part of the computer that you type on.
(c) the part of the computer that looks like a television
(d) something you use to click on things (files, etc.).
(e) the part of the monitor that you look at.
(f) The main device that a computer uses to store information.Match the words with their meanings.Listening:Listen to the tape and fill in the chart:WebRadioBookType of IT TVYou can both listen and watch.You can’t write to friends.You can find information.It’s very expensive.You can listen to English.You can’t watch a film.You can get information.Sometimes it is out of date.Advantages 幻灯片 14 DisadvantagesLI MING: What are you doing Dave?
DAVE: I'm reading about _____________________．
LM:?You mean things like computers? _____________ they’re so boring to read about. They're only good to use.information technologyIn my opinionLISTENING TEXTD:?But they're just one kind of IT．
LM:?Really? So what else is part of IT?
D:?We've had IT for a long time. _______________________are also kinds of IT．
LM:?Oh. I never thought of that before. ______________________________ ________________.Books, radios and TVSBooks are a wonderful way for usto get information D:?Yeah, I believe that too. They are cheap and easy to take with you but sometimes the _________________ ____.
LM:? I agree. The world is changing so fast. But in my opinion __________ ________________ is better than anything else. Sometimes I alsoinformation is out ofdatelistening tosports on the radio listen to English programmes on the radio. But they speak so fast and sometimes it’s difficult to understand everything．
D:?Yes. I also listen to English on the radio but ______________________ because you can also see what is going on. Sometimes it is more interesting toit’s easier to follow on TV watch sports on TV than just listen to them on the radio．
LM:?I ________ because you get such a lot of information on the technical aspects of a game on the radio．You don't get that on TV. But __________________disagreeI still think that the computer is the best kind of IT. You can watch a film on it,__________ ,________________, and find out what is going on in the world．
D:?I know, but it is also the most expensive and it is too big to carry with you everywhere. Also the Internet has nobody to check whether that information you find there is correct. So you have to be careful．write to friendsget informationLM:?Well, I suppose all kinds of IT have both __________________________.disadvantages and advantagesdiscussing * What are the changes brought by different forms of IT ?
* What are the advantages and disadvantages of them ?
USeful expressions? I think that…
? In my opinion, …
? I believe that…
? I agree because…
? I disagree because…
? I think this one is better,
because…Giving an opinionReasoningDiscussion :
Computers are useful and have brought us lots of good things, but they also cause bad effects. What attitude should we have towards the computer? Make good use of it but never get trapped by it.Speaking You have been asked by your parents to help choose computers for your home. You and your friend have looked at several computers. Talk about the special things each computer can do. Make a decision about which kind of computer to buy and explain why.modern
computerWhat the computer could have? a faster PC
? improved disc storage
? Internet
? the monitor is small
? used recycled materials
? a flat screenPair Work : Make a dialogue on the basis of the results of your discussion, using the following useful expressions.Supporting an opinion
* Perhaps, but what if/about ..?
* Have you thought about …?
* What makes you think that …?
* I don’t like it because…Challenging an opinion *I think that …because …
*One reason is that …
*I think it is better because…* I have decided that…
* Let’s make our decisionMaking a decisionOral reportDo an oral report to your father and start your report like this:
I looked at many different computers. The one I have chosen is the PEP personal computer. One of the main reasons is that it is suitable for homes. I found that…The whole class will be divided into four groups ,and each group send a student to stand before the platform , who guess what the object is and the rest of the group mates can only do some movements to let his or her group representative guess what the object is and the group mates who guess the object must use the following expressions:I think that…… In my opinion……
I believe that……ListeningInterviewFour students in a group:Warming up – II ( 4m ) mouse
monitor
do the word processing
keyboardPre-reading – I ( 1m ) What can we do on a computer and through the Internet?Computer and Internet type my homeworkdraw picturesplay gamescommunicate with my friends.gather information for my lessonslisten to musicwatch movies……What is it in English??Main board(主板)CPU (central processing Unit)
中央处理器RAM
(随机存储器)
(Random Access Memory )hard disc
硬盘DVD ROM
Digital Versatile Disc Read Only Memory
数字通用光盘 AbacusHuge computerPCCalculatorNotebook
computerInternetRobot?Ⅴ. Complete the sentences with some of the words in the box . You can use each word only once. 1. A _______ is a machine for printing text or pictures onto paper, especially one connected to a computer.
2. A __________ or disk is the main device that a computer uses to store information.
3. A ________ is used to see your data on a computer.
4. A __________ is used to put data into a computer.printerhard discmonitorkeyboardMonitor mouse keyboard hard disc floppy disc CD-ROM printer scanner modem Chips CPU 5. A _______ is often used to connect computers to each other through phone lines.
6. Data can also be stored in a ___________ , which is small and can be carried easily.
7. A _________ is a disc that contains computer data. It can store a large amount of data.modemfloppy discCD-ROMⅤ. Complete the sentences with some of the words in the box . You can use each word only once. Monitor mouse keyboard hard disc floppy disc CD-ROM printer scanner modem Chips CPU How do people use the computers in daily life？ (1). use computer for school work
(2). play games on the computer
(3). send emails to friends
(4). surf the Web for fun
(5). download music and films
(6). chat online
(7). search for information
(8). look at photographs
(9). do shopping online
……Discussion Suggested answers:A good way to get information, cheap, easy to take with youSometimes the information is out of dateListening to sports and English programmes are better.Speak fast and hard to understand everythingEasier to follow and can see what is going on , more interestingCan not get information on the technical aspects of a gameWatch, write, get and find out some informationExpensive, too big to carry with you. I think that...
In my opinion...
I believe that...
I agree because...
I disagree because...
I’ve decided that...Pre-readingSolve a riddle : one thingIt has a big faceWith many keysTwo big ears which can play musicYou can watch TV or see a movie using itIt can be seen in the office, classroom and at home.Download informationguessKeyboard (键盘)Power supply
(电源)CRT display
（Cathode?Ray?Tube阴极射线管）
纯平显示器mouse
鼠标display card
显卡