许某某英语课件

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Computer

主讲人：许某某

Unit 3 Computers

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

Do you know who I am?

the history of the computer

PDA

(What do they have in common?)

I think thatXXXXX

In my opinionXXXXX

I believe thatXXXXX

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.

Discussion

What is it in English??

Main board(主板)

What is it in English??

CPU (central processing Unit)

中央处理器

What is it in English??

hard disc

硬盘

What is it in English??

Keyboard (键盘)

What is it in English??

Monitor显示器

Screen

屏幕

What is it in English??

mouse

鼠标

DVD ROM

数字通用光盘

What is it in English??

P56

What can you do with a computer and Internet?

I used the computer and / or Internet to:

type my homework

draw pictures

play games

communicate with my friends/chat

get information

listen to music

watch movies

go shopping online

?

Pre- reading: Can you put these inventions in an order according to the time when they appeared?

( ) Analytical machine（分析机）

( ) Laptop

( ) Calculating machine （计算机器）

( ) Robot／android

( ) PC

( ) Universal machine（通用机器）

Who am I ?

Fast reading :

1 Who am I ?

2 Who built the first analytical machine?

3 Who was the next important person to design computers?

Charles Babbage

Alan Turing

I am a computer.

What’s the main idea of this passage?

A. The development of computers

B. The development and use of computers

C. A machine which is simple-minded

D. Computers may replace human being

Fast-reading

Timeline

Further-reading

The computer began as a calculating machine.

1936

The computer had grown as large as a room.

1960s

Computers were used in offices and homes.

Computers connect people all over the world together.

The computer grew rapidly both in size and in brainpower.

( ) ①I began as a calculating machine

in Japan in 1642.

( ) ②In 1936, I grew rapidly both in size

and in brainpower.

( ) ③As time went by, I was made bigger.

( ) ④Since the 1970s many new

applications have been found for me.

3. True or False

F

T

F

T

Read the passage again. Find the topic sentence of each paragraph and the supporting details.

Paragraph 1: Over time I have been changed quite a lot.

1. calculating machine

2. analytical machine

3. universal machine

4. laptop

While-reading

Paragraph 2: These changes only became possible as my memory improved.

1. tubes

2. transistors

3. chips

4. network

5. World Wide Web

While-reading

Paragraph 3: Since the 1970s many new applications have been found for me.

1. communications

2. finance

3. trade

4. robots

5. mobile phones

6. medical operations

7. space rockets

8. providing a life of high quality

While-reading[全文已结束，注意以上仅为全文的文字预览，不包含图片和表格以及排版]

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