Unit 3 GomputersSection Warming Up & ReadingPrereadingStep 4Step 3Step 2Step 1Step 51In our daily life, the computer and the Internet play an important role, what ways do you think the computer can help us?2Who do you think is the founder of the world wide web? Please read the following passage to get the answer. Most people have never heard of Tim BernersLee. He is not nearly as rich or famous as Marc Andreessen, who is the founder of Netscape, or Bill Gates, whose name has become a wellknown word. BernersLee, who works in a small office at the Massachusetts Institute of Technology, is the creator of the World Wide Web. The creation of the Web is so important that some people compare BernersLee to Johann Gutenberg, who invented printing by movable type (活字活字) in the fifteenth century. BernersLee was born in England in 1955. His parents, who helped design the worlds first commercially (商业地商业地) available computer, gave him a great love of mathematics and learning. In 1980, BernersLee went to work at CERN, a physics laboratory in Geneva, Switzerland, where he had a lot of material to learn quickly. He had a poor memory for facts and wanted to find a way to help him keep track (轨道轨道) ofthings he couldn t remember. He invented a software program that allowed him to create a document that had links to other documents. He continued to develop his idea through the 1980s. He wanted to find a way to connect the knowledge and creativity of people all over the world. In 1991, his project became known as the World Wide Web. The number of Internet users started to grow quickly. However, BernersLee is not completely happy with the way the Web has developed. He thinks it has become a passive tool for so many people, not the tool for creativity that he had imagined.1Look at the following picture, can you name some parts of the computer?答案：答案：(1)host computer (2)monitor(3)screen(4)keyboard(5)mouse(6)speaker2. Match the words with their meanings. (1)A monitor isAthe part of a computer that stores information. (2)The screen is Bthe part of the computer that you type on. (3)A keyboard is Cthe part of the computer that looks like a television (4)A mouse is Dsomething you use to click on things (files, etc.)(5)A CDROM is Ethe part of the monitor that you look at.(6)A hard disk is Fthe main device that a computer uses to store information.答案：答案：(1)C(2)E(3)B(4)D(5)A(6)FScan the text and then choose the best answer according to the text.1In 1936, Alan Turing wrote a book about_. Ahow to simplify difficult sums Bhow the computer could be made to work as a “universal machine” Chow to build an analytical machine Dhow to change the computers shape 答案：答案：B2Why did the computer totally change its shape? ABecause the computer could do many things. BBecause the computer could simplify sums. CBecause its memory improved. DBecause the computer never forgot anything. 答案：答案：C3How long did it take before the computer was built as an analytical machine? A500 years. B300 years. C100 years. D200 years. 答案：答案：D4According to the last paragraph，which was not mentioned in the use of the computer? AMobile phones. BRockets. CBikes. DRobots. 答案：答案：C5.How can you understand the underlined word? Since the 1970s many new applications have been found for me. Aa formal request for sth. Bthe practical use of sth. Can act of spreading sth. Dan act of making a rule 答案：答案：B1Read the text and then do the following exercises. Write out the main idea of the text. This is a short of the of computers.2Look at these inventions.Can you put them in an order according to the time when they appeared?historydevelopment答案：答案：DAFBCE3Read the text and then fill in the blanks.Paragraph 1Topic sentence .Supportingdetails(1)calculating machine(2)analytical machine(3) (4)PC(5)laptopParagraph 2Topic sentenceThese changes only became possible as my memory improved.Overtime I have been changed quite a lotuniversal machineSupporting details(1) (2) (3)chips(4)network(5) Paragraph 3Topic sentenceSince many new applications have been found for me.Supporting details(1) (2)finance(3)trade(4)robots(5)mobile phones(6) (7)providing a life of high qualitytubestransistorsWorld Wide Webthe 1970scommunicationspace rocketsFill in the blanks according to the text. I began as a 1. machine in 1642.It took nearly two hundred years 2._ I was built as an analytical machine.I became a “universal machine” in 1936 to 3._ any mathematical problem. I was very big at one time.However, as time 4.， I was made smaller and smaller.I was given a family 5. by a network in the early 1960s. I was able to 6._ my knowledge with others 7._ the World Wide Web.calculatingbeforesolvewent byconnectedsharethrough I have been widely used in many fields, such as in communication, 8._， trade and medical 9. .I have also been put into robots and space rockets to 10._ the Moon and Mars. Im glad I am a devoted friend and helper of the human race.financeoperationsexploreEvery coin has two sides, so does the Internet.Talk about the advantages and disadvantages about the Internet._参考答案：参考答案：Advantages：(1)No matter how far it is, we can communicate with our friends by Internet.(2)We can collect related information for our lessons.(3)We can watch movies and listen to music, which makes our life interesting and colourful.(4)We can do shopping on the Internet.Disadvantages：(1)If we play computers for a long time, it is bad for our eyes and health.(2)It is a waste of time and money.(3)Make people isolate from their friends.(4)Some people especially the teenagers are crazy about the computer games and chatting on the Internet.As a result，they have little time to study.(5)Some people use the computer wrongly.Conclusion：There is no doubt that computers have two sides, too.If we make good use of it, it will make our lives more colorful and convenient.But dont lose yourself in playing computers.Just remember: Keep fit, study well and work hard.