Unit 3 Computers
Period 1 Warming up
Heavy! Difficult! Hard! Tired!
1. Easy! 2. Fast! 3. Free!
host computer speaker keyboard mouse
What do they have in common?
a notebook computer a laptop
(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?
work for us in Mars(火星)
work in wars (战斗)
What do you think will be the next development?
CD -- DVD-ROM CRT monitor LCD monitor 使用阴极射线管(Cathode Liquid Crystal Display ---DVD RW
USB flash disc
1 TB 固态硬盘
USB Flash disc
Core 2 Duo
酷睿2 : 4核
other useful words and expressions about computer: Network网络
Virus 病毒 Home page 主页 Password 密码
Up load 上传 Program Website 程序 站点
Desk top 桌面
User name 用户名
Hardware 硬件 Home page 主页
Who am I?
Skimming: Read and answer these questions:
1. Who am I?
2. Who was the first person to invent the earliest computer?
3. Who was the next important person to design computers?
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
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
Universal machine 万能机,通用机器 Artificial intelligence 人工智能
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
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 ______ .
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.
times when my size was P2 L1 There were ______ totally ________changed.
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.
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
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.
Review the text
Recite Para one
Finish Ex. 1/2 on Page 20.