Unit4Computers.ppt

1、Chapter 4,Computers (2),Reading comprehension,Play a game,Which part comes the first?,Play a game,Which part comes the last? Whats in it?,Play a game,What are they according to the order?,Read and complete,1. The _ shows words and pictures. 2. We use the_ for typing in information. 3. The _ _ record

2、s information. 4. The _ helps you to control the computer. 5. The_ _ contains all the computers electronics. 6. We can hear the sound from the _. 7. We put disks into the _ in the main unit.,monitor,keyboard,floppy,mouse,main,speakers,drives,disk,unit,Read and complete,1. r_ not often; seldom 2. o_

3、control; keep running 3. s_ excellent; large; special 4. c_ hold 5. e_ very important; necessary 6. c_ k_ something that is known by most people,ommon,ssential,ontain,uper,perate,arely,nowledge,Look and think,Where can we find computers?,Look and think,Computers Hidden helpers,Listen to text 1 and f

4、ill in the blanks.,Not so many years ago, you _ _ saw computers. Now they are everywhere. There many also be _, hidden computers in your home that you are _ of. There may be one inside your TV set, telephone or washing machine. So maybe you _ _ computers more than you _.,hardly ever,tiny,unaware,dep

5、end on,realize,Look and learn,hardly ever, almost never,tiny, very small,be unaware of, not knowing about,depend on, rely on, need,realize, notice, know about,Read text 2 and do T/F questions,1. Computers can type, print, but they cant draw things. Computers can calculate but always make some mistak

6、es, so we rarely use it to calculate. 3. Computers are super calculators. Because aeroplanes and spaceships are operated by people, they dont need any computers. 5. Computers are called electronic brains.,Read and answer,Find out the synopsis :,Computers are electronic brains and they can do many ki

7、nds of things.,Make notes,Computers are electronic brains. 1. They can _ very fast and rarely _ wrong answers. 2. They can also _, _ and _ things like diagrams and graphs. 3. They can _ you and _ _ with you. 4. They can _ railways and _ aeroplanes and spaceships.,calculate,give,type,print,draw,teach

8、,play,operate,fly,games,Pair work: Sort out text 3 and 5,1. Many of todays computers have CD-ROM drives. 2. If we want a computer to do different jobs, we have to give it different programs. 3. Some people think that CD-ROMs will soon be more popular than books. 4. The program is written by a human

9、being, and it is essential that the human does not make a mistake. 5. We give a computer instructions by putting a program into it. 6. Thus, for example, you can use your computer to read about a famous person in history such as John F Kennedy, and you can see a photograph or video of him, and even

10、listen to him speaking. 7. A CD-ROM can hold over 300,000 pages of writing, and can also contain pictures and sound.,Sort it out,2. If we want a computer to do different jobs, we have to give it different programs.,4. The program is written by a human being, and it is essential that the human does n

11、ot make a mistake.,5. We give a computer instructions by putting a program into it.,the right order: _,5 4 2,Text 3: How do we give a computer instructions?,1. Many of todays computers have CD-ROM drives.,Sort it out,3. Some people think that CD-ROMs will soon be more popular than books.,6. Thus, fo

12、r example, you can use your computer to read about a famous person in history such as John F Kennedy, and you can see a photograph or video of him, and even listen to him speaking.,7. A CD-ROM can hold over 300,00 pages of writing and can also contain pictures and sound.,the right order: _,1 7 6 3,Text 5: CD-ROMs,Give examples,1. S1 Computers can draw things. S2 For example? S1 _ and _. 2. S1 Computers can do some important jobs. S2 For example? S1 _ _and _ _. 3. S1 CD-ROMs can hold more things than books. S2 For example? S1 _ and _,as well as writing.,Diagrams,graphs,Operating,flying,P