Now answer the questions about other possible meanings of the words.

(a) to look at different websites on the Internet? (b) to ride big ocean waves? 1. Which word means both

(a)an accident in a car? (b) a computer breakdown? 2. Which word can you use to describe both

(a)a verb meaning to save information on your computer (b) a noun meaning a place where you can buy things 3. Which word is both

4. What’s the difference between the verb and noun meanings of the word log? A log is a piece of a cut down tree; to log on means to start work on a computer.

5. What is the difference between computer hardware and computer software? Hardware is the tangible （有形 的，实体的） pieces of equipment; Software is the programs one uses on the computer.

Listen to the tape and answer the questions: 1.What is the Internet? 2.How did it start? 3.What is the World Wide Web? 4.Who invented the World Wide Web? Read the passage quickly and finish doing  and  on Page 53.

Read for Further Information

It is a computer network that allows computer users to access information from millions of websites via the Internet. What is the world wide web?

Who invented it? An English scientist named Tim Berners-Lee. When was it invented? In 1991.

What is the inventor of the world wide web doing now? He now works as a lecturer at Massachusetts institute of technology in Boston.

 Accessible adj. 易接近的  Our principal is accessible to the students.  Access n. means of entering; entrance. Access to the resort( 度假胜地 ) is quite easy. 这个度假胜地很容易到达。 easy of access Language points:

 Consist of 由 … 组成，由 … 构成  The club consists of more than 200 members.  Consist in something (not in progressive forms) : depend on （在于，存在于）  The beauty of Venice consists in the style of its ancient buildings. 威尼斯之美在于其古建筑 的风格。  Consist with 与 … 一致； 相符  他言行不一。  His action does not consist with his words.

millions of thousands of hundreds of scores of dozens of The U.S. Defense ARPA ARPA: Advanced Research Projects Agency 高级研究计划局

Develop vt & vi 使发达；使发展；使发育 He believes that sport can developed mind and body. 常用词组 develop the habit of doing something 养成作 …… 的习惯 develop an interest in something 培养对 …… 的兴趣

常用形容词有： important, necessary, possible, impossible, unusual, popular It be /become +adj.+ for sb./sth. to do sth. It is important for the students to learn English well.

Be known as : 作为 … 而出名 George is known as a famous singer. Be known for 因 …… 而出名 The place is known for its fruit, especially its seedless grapes. Be known to 被 …… 所熟知 It is known to us all that theory comes from practice.

Via prep. by way of He sent me a letter via one of my friends. At the moment 此刻 At any moment 在任何时候 For the moment 目前，暂时 For a moment 片刻，一会儿 At the last moment 在紧要关头

Go down 下降 ( 太阳，月亮 ) 落下 The sun is going down. 价格下跌 Price don’t seem to be going down. 退烧 I’m glad your temperature has gone down. Rise vi. 升起，提高，上涨（不跟宾语） The sun rises in the east. Raise vt. 提高，抬起（必须跟宾语） The student raised his hand to answer the teacher’s question.

Come up with 赶上；提出，提供 We shall have to work hard to come up with him. I hope you can come up with a better plan than this. as prep. 作为；如同 His talents as a film actor were soon recognized. 作为演员，他的天赋很快得到了赏识。