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Unit 3 Computers
Period 1 Warming up

Heavy! Difficult! Hard! Tired!

1. Easy! 2. Fast! 3. Free!

camera

monitor

screen

host computer speaker keyboard mouse

What do they have in common?

a calculator

an abacus
a desktop

a notebook computer a laptop

digital camera

a robot

Discussion
(What do they have in common?) 1.They can be used for ? I think that… calculating. ? In my opinion… ? I believe that… 2.They can deal with maths problems. ? What’s your 3.They are our friends. reason? 4.They are useful and ? Why do you helpful. think so?

What’s next?
work for us in Mars(火星)

carry things

work in wars (战斗)

仿真机器人

entertainment
娱乐

What do you think will be the next development?

some hardware:

CPU

hard disc

chips /motherboard

CD -- DVD-ROM CRT monitor LCD monitor 使用阴极射线管(Cathode Liquid Crystal Display ---DVD RW
Ray Tube)的显示器

keyboard

mouse

modem

scanner

printer

speaker

Memory:(存储器)

USB flash disc
floppy disc/disk

CD/VCD/DVD

MP3 player

MP4 player

Hard disc:

移动硬盘

1 TB 固态硬盘

USB Flash disc

1T 硬盘

cpu:

Core 2 Duo

酷睿2 : 4核

龙芯8核

other useful words and expressions about computer: Network网络
Virus 病毒 Home page 主页 Password 密码

Download 下载
Up load 上传 Program Website 程序 站点

Desk top 桌面
User name 用户名

Click 点击
Software 软件

Hacker 黑客

Hardware 硬件 Home page 主页

Reading:

Who am I?

Skimming: Read and answer these questions:

1. Who am I?
A computer.
2. Who was the first person to invent the earliest computer?

Charles Babbage
3. Who was the next important person to design computers?

Alan Turing

Scanning:

timeline

1642: The computer began as a calculating machine.

1822: the Analytical Machine was built by Charles Babbage.
1936: The computer grew rapidly both in size and
in brainpower. 1940s: Computer had grown as large as a room.

1960s: the first family of computers was connected to each other 1970s: Computers were used in officers and homes. Now: Computers connect people all over the world
together.

The history of computers

The first generation (1945-1956)

the second generation (1956-1963)

the fourth generation (1971- )

the third generation (1964-1971)

The development of computers:
Calculating machine Analytical machine

计算器

分析机
Universal machine 万能机,通用机器 Artificial intelligence 人工智能

Internet

Computer

Develop Early days -ment Name Function Poor A calculating _________ Simplify machine difficult sums An analytical ________ Think logically machine and produce an answer quickly A _________ universal Solve difficult mathematical machine ____________ Strong problems __________

Develop Network times -ment Memory Tubes _________ Large stored in ____________ Transistors Small Small chips Applications Communication Narrow ______ __________ Finance ________ Trade Robots Mobile phones Medical operations ___________ Space rockets Wide

Intensive reading:
Underline the phrases &sentences that you think are important

Star sentences: followed P1 L2 I _______instructions from cards with holes. 我执行穿孔卡的指令 P1 5 Earlier I was not very big, but then I huge became ______ .
早些时候我并不是很大,但是后来我变得非常大

P1 L6 However, people thought I was simple-minded discovered I had ___________ until they _________ “artificial intelligence.”
可是,人们认为我头脑简单, 直到发现我有人工智能时, 他们才不那么想了。

P1 L8 As the years have ________, gone by I have been made smaller and smaller.
随着岁月的流逝, 我被做得越来越小了.

times when my size was P2 L1 There were ______ totally ________changed.
有段时期我的体积完全变了

standing P2 L3 But I was always so lonely _______ there by myself, until in the early 1960s,they gave me a family connected ________ by a network.
但是我总是孤孤单单地站在那里,直到60年代初, 人们才 给了我一个用网络连接的家庭。

Discussion Advantages and disadvantages of the computers.

advantages
we can communicate with friends listen to the music see films & watch news play games do shopping save a lot of time do a lot of useful things

Disadvantages
Some people especially the teenagers abandon (沉迷于) themselves to the computer games and chatting on the Internet. As a result, they have little time to study . Some people use the computer wrongly.

Homework
1.
2.

Review the text
Recite Para one

3.

Finish Ex. 1/2 on Page 20.


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