Unit%203%20Computers

1
Unit 3 Computers

• Warming up and Reading
• ????
• ???

2
Unit 3 Computers Who Am I?
3
Guessing game
4
Guess!
Computers
A handbag?
A toy?
5
Guess more

• 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
6

• 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
7
With me you can watch different programmes just
at home. Im a machine that has a screen with
moving pictures and sounds. But watching me too
much is bad for your eyes.
TV set
Who Am I
8
I am a machine which is a good helper in doing
housework. I wash clothes for people. Who am I?
washing machine
9
I can be used for calculating. Besides, I can
also be used for watching DVD, sending e-mails
and communicating through the Internet. However,
I am not a PC, because Im small enough for you
to take me with you.
Do you know who I am?
notebook computer/ laptop
10
What English words do you know about computers?
11
What is it in English??
mouse
12
What is it in English??
CPU (Central Processing Unit)
13
What is it in English??
main board
14
What is it in English??
screen / monitor
15
What is it in English??
keyboard
16
What is it in English??
speaker
17
Components of a computer
screen
1
monitor
2
3
hard disk
6
CD-ROM
mouse
5
4
keyboard
18
Let's have a discussion!
How can we use the computers?
19
search for information
watch movies
20
listen to music
read books and magazines
21
send emails to friends
download music and films
22
buy things online
play games on the computer
23
look at photographs on the computer
draw pictures
24
use a computer for school work
chat with others
25
Discussion
What are the advantages and disadvantages of the
computers? In my opinion,I can use the
computer to.
26
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 online 6. use QQ to make friends 7.
communicate with others
27
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
28

• Disadvantages
• Some students may get too addicted (???)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 (??)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.

29
Who am I ?
30
Task 1 Fast reading
1. Who is the speaker in this passage ?
A computer.
The main idea of this passage
history
This is a short ________ of computers.
31
Scanning
Timeline
1642 The computer began as a calculating machine.
1822 The analytical machine was made by Charles
Babbage.
1936 The computer grew rapidly both in size and
in brainpower.
1940s The computer had grown as large as a room.
32
Scanning
Timeline
1960s The first family of computers was
connected to each other.
1970s Computers were used in offices and homes.
Now Computers connect people all over the world
together.
33

• 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 computers 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
34
4. When were the computers connected firstly?
A In the 1970s B In the early 1960s C
In 1936 D In 1822 5. Which of the
following statements is not right? A Computer has
a long history. B Computer has changed greatly
since it was first made. C Computers are
widely used now. D Computer was brought into
peoples home in the 1960s.
B
D
35
P1 P2 P3
Topic sentence 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.
Supporting details 1. calculating machine 2. analytical machine 3. universal machine 4. PC 5. laptop tubes transistors chips network World Wide Web 1. communications 2. finance 3. trade 4. robots 5. mobile phones 6. medical operations 7. space rockets 8. providing a life of high quality
36
Fill in the blanks I began as a ________
machine in 1642 in France. In 1822 I was built as
an ________ machine. Then in 1936 Alan Turing
wrote a book and built a ________ machine. As the
years have___ ___, I have been made ______ .
There were times when my size ______ changed. And
my memory became _____ large _____ I couldnt
believe it. In the 1960s they gave me a
family_________ by a network. I was able to
_________________with others through the World
Wide Web. Since the 1970s many new applications
______________ for me.
calculating
analytical
gone by
universal
smaller
totally
that
so
connected
share my knowledge
have been found
37
Goodbye!