人教版必修二unit3

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Computer
What English words do you know about computers?
What is it in English??
mouse 鼠标
What is it in English??
CPU (central processing Unit)
中央处理器
What is it in English??
PDA
Personal Digital Assistant
5.It is a machine, which you can use to type your homework, draw pictures, play games, watch movies, listen to music, communicate with your friends, gather information…
You Your partner
Write out all the words you know about computers.
With the development of science and technology, many new things appear in human being’s life.
Let’s guess what they are:
1. With me you can watch different programmes just at home. I’m a machine that has a screen with moving pictures and sounds. But watching me too much is bad for your eyes.
Riddles (谜语)
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 don’t like me now. Do you know who I am?
Main board(主板)
What is it in English??
Display / Monitor
keyboard
mouse scanner
printer
Βιβλιοθήκη Baidu
speaker
Do you know in what ways computers are used today? Work out a list and compare it with your partner.
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
car
3. I am a machine which is a good
helper in doing house work. I wash clothes for people.
Who am I?
washing machine
4. A machine that you use to talk to other people even in a far-away place. We are connected .Now each of us often has a number.
Who am I?
telephone
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, however smaller than the smallest laptop, I’m a great way to store telephone numbers, access the internet, make calculations, and so on. Do you know who I am?
search for … see movies
listen to music
read books and magazines
send emails to friends
download music and films
buy things on line
play games on the computer
abacus
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?
calculator
look at photographs on the computer
draw pictures
use a computer for school work
take part in chat groups
Ask and answer questions in pairs.
How do you use computers and the Internet?
TV set
2. I am a machine which moves very fast on four wheels. You need a license(执照) and must be very careful when you drive me. Rolls Royce, Benz and BMW are some famous kinds of me.
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