UNIT 4 Information technologyIf you have any trouble sounding condescending，find a Unix user to show you how it's done.—Scott Adams如果你不知道怎么樣表現(xiàn)得高人一等，找個(gè)Unix用戶，讓他做給你看。——斯科特·亞當(dāng)斯If you don't double-click me，I can't do anything.—John Aniston如果你不雙擊我，我什么也做不了。——約翰·安妮斯頓The Internet is so big，so powerful and pointless that for some people it is a complete substitute for life.—Andrew Brown互聯(lián)網(wǎng)是如此之大，強(qiáng)大而無意義，以至于對(duì)某些人來說，它是生活的完全替代品。——安德魯·布朗You should focus on the difficulty in acquiring useful information in spite of advanced information technology.The recent decades has witnessed the remarkable development of information technology，which indicates we have entered an era of information.However，here arises an issue about how to dive into oceans of information and acquire the useful one.Can you imagine a world without the Internet? It's surprising to think about it.Now，China has more than 162 million Internet users，according to the China Internet Network Information Centre.This is the second highest number of user in the world after the United States.Today，66% of Chinese “netizens” are teenagers.“They spend about thirteen hours every week online，” said Qian Hulin，an Internet expert.Doctor Song in Beijing Xuanwu Hospital said about 14% of Chinese netizens who are teens often lasted over ten hours to play online games.The main reasons why teenagers surf the Web are to search for information，to communicate with others and to have fun.On the Internet，teenagers can find out almost anything.And surfing the Web can help students with their homework and widen their knowledge.Li Dong，a teacher at No.41 Middle School in Shijiazhuang，likes her students to use the Internet.“When we talk in class，students who surf the Net usually know more background information than the others，” she said.In addition，people can use the Internet to write letters or stories and send e-mails.Many teens keep in touch with their friends online.It is cheaper than phoning somebody far away and also much quicker.[探索發(fā)現(xiàn)]1．Which country has the largest number of Internet users in the world?The United States.2．Why do teenagers surf the Net?They want to search for information，to communicate with others and to have fun.  

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