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Unit3 Computer


Solve a riddle : one thing
It has a big face

With many keys
Download information

Two big ears which can play music
You can watch TV or see a movie by using it It can be seen in the office, classroom and at home

Unit 3 computer

Pre-reading
What do you do with your computer in daily life?

Words
calculator laptop simplify logically artificial revolution intelligence n.计算机 n.手提电脑 vt.简化 adv.逻辑上;合逻辑地 adj.人造的;假的 n.革命 n.智力;智能

While-reading skimming

What’s the general idea of this passage? The development of computers.

scanning

Calculating machine

1.When and where did the computer begin as a calculating machine? The computer begin as a calculating machine in France in 1642. 2.What did the computer could do at that time? It could simplify difficult sums.

analytical machine

1.Who built the computer as an analytical machine?

Charles babbage.
2.What did the computer could do after it was programmed by an operator? The computer could “think ” logically and produce an answer quicker than any person.

universal machine

1.Who wrote a book about the “universal machine”?
Alan Turning

2.What kind of problem could be solved with the computer in 1936?
It could solve any difficult mathematical problem.

Alan Turning, the father of computer

PC PC

laptop

How did computers’ memory improve?
First it was stored in tubes ,then on transistors and later on very small chips. It has developed very much , like an elephant.

Decide whether they are true or false and give a reason.
1)I began as a calculating machine in America in 1642. F 2)In 1936 , I could solve any difficult scientific problem. F 3)Since the 1970s many new applications have been found for me . T 4)In 1970,they gave me a family connected by a network. F 5)My memory first was stored on transistors , F and then in tubes and later on very small chips

Careful-reading Find the main idea of each paragraph.
?Para.1:Over time I have changed quite a lot . ?Para.2: These changes only became possible as my memory improved. ?Para.3: Since the 1970s many new applications have been found for me .

Summary
The development of computers
1642
1822

The computer began as a calculating machine
The Analytical Machine was made by Charles Babbage.

1936 1940s 1960s 1970s now

Alan Turning wrote a book to describe how computers could be made Computers had new transistors and became smaller
The first family of computer was connected to each other

Computers were brought into people’s homes Computers connect people all over the world

Post-reading

Discussion
How computers have changed our lives?

computers used in transport

space travel

education

? HOME OFFICE

health (medical care)

Translate the following sentences into English.
1.有了电脑的帮助,你会发现处理和分享信息是不 困难的。(with the help of ) With the help of computer, you will find that it is not difficult to process and share information.
2.杰克上学期考试不及格,从那时起他的父母就不再让他 玩电脑了。(from then on ) Jack failed the last semester exam, from then on his parents wouldn't let him play computer any more.

3.发射火箭进入太空的信号出 了差错,结果火箭爆炸掉入了 大海。(as a result of ) ? The signal that firing the rocket into space is wrong , as a result, the rocket exploded and fell into the sea.

Homework:
1.Finish the workbook exercises; 2.Write a composition about the advantages and disadvantages of computers.


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