Unit 3 Computers
Reading
Guessing game
Guess!
A toy?
A handbag?
Computers
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?
abacus
Guess more:
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
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 a PC, because I’m small enough for you to take me with you.
notebook computer/
laptop
Do you know who I am?
What do you know about computers?
Brain storm
shapes
parts
sizes
colors
kinds
drives
monitor
keyboard
main unit
mouse
speakers
Do you know them?
CD-ROMs
work for us in Mars(火星)
What’s next?
carry things
work in wars (战斗)
仿真机器人
entertainment
娱乐
What do you think will be the next development?
Who am I?
Reading
1.In the passage, “I” refers to _________.
2.the topic sentence of each paragraph.
Paragraph I:

paragraphII:

paragraphIII:

So the whole passage is mainly about:
_________________________________.
I.Scanning(略读)
a computer
Over time I have been changed quite a lot.
These changes only became possible as my memory improved.
Since the 1970s many new applications have been found for me.
Fast-reading
the development of computers.
Read the passage and choose the best answers.
1.What can we learn from the text?
A Computer has a short history.
B No one knows computer when the first computer was made.
C Computers are not widely used even today.
D Computers are widely used.
2. Who was the computer’s real father?
A Alan Turning B Not mentioned in the text.
C Bill Gates D Charles Babbage
3 .The computer almost changed completely _______.
A in 1642 B in 1882 C in the 1960s D in the 1970s
D
A
C
The computer _____ ___ ___ _______ machine．
1822
Alan Turing ____ __ ___ ____ ________ how computers could be made to work．
Computers had _____ ___ ______ __ a room.
1960s
First as _ ____and then ___ __ ___ computers were used in offices and homes.
Computers connect people all over the world
together.
A family of computers was connected by a network.
The _________ machine was made by Charles Babbage.
began as a calculating
analytical
wrote a book to describe
grown as large as
a PC as a laptop
analytical
universal
mathematical
problems
transistors
communication
trade
applications
medical operations
strong
small
wide
What are the advantages and
disadvantages of the
computers?
In my opinion,I can
use the computer
to….
Discussion
We can use the computer to…….
listen to music
Watch movies
search for …
communicate with…
do shopping
Advantages
We can use the compuers to…
1. use a computer for school work
2. play games on the computer
3. send emails to friends
4. download music and films
5. go shopping on line
6. use QQ to make friends
7. communicate with others
8. use the Internet to search for information
9. surf the web for fun
10. read news both at home and abroad, read books and magazines
Disadvantages
Some students may get too addicted (沉溺于)to it .
Some students waste too much time in playing computer games.
Some students spend too much time in chatting with others and may be cheated (欺骗)by someone on line.
As a result, they have little time to study
It is bad for our eyes and health to spend long time in front of computers.
Homework:
Read the passage fluently.
2. Do Ex on period 2.
3. Retell the passage .
Goodbye!