高级视听说Unit_2-Chapter_4_new(2)

1. Recognizing Information and Checking AccuracyFor questions 1-4, you will hear multiple-choice questions about the information presented in the talk. Listen to each question and decide whether (a), (b), (c), or (d) is the best answer to the question.

高级视听说Unit_2-Chapter_4_new

1. Recognizing Information and Checking Accuracy1. a. hundreds of ISPs What is the Internet? b. tiny packets of information c. individuals, organizations, and companies d. a gigantic network of connected computers 2. a. an ISP What is a router? b. a postal agent c. a specialized computer d. communication software 3. a. a book What is carried on every tiny packet of information that b. software travels through the Internet? c. a network d. its destination address 4. a. postcard What is a router compared b. postal agent to in the lecture? c. page of a book d. packet of information

高级视听说Unit_2-Chapter_4_new

For questions 5-7, you will hear statements about the Internet and how it works. If the statement is true, put a T on the line next to the number of the statement. If the statement is false, put an F on the line, and explain why the statement is false.

5. The Internet is controlled by one gigantic ISP. (F There is no one controlling network at the top.) 6. Routers can send the packets of information in one e-mail message over many different routes to their destination. (T) 7. The lecturer compares the tiny packets of information that travel through the Internet to electronic postcards. (T)

高级视听说Unit_2-Chapter_4_new

2. Using and Expanding on the Information in the Talk

a. Recapping the Information from Your Notes. Use your notes to recap the information you learned about how the information in e-mail messages, Web pages, a

nd downloaded files travel over the Internet.

高级视听说Unit_2-Chapter_4_new

2. Using and Expanding on the Information in the Talk

b. Expanding on the Information in the Talk. Discuss with a classmate why you agree (or do not agree) with the following statements.

1. The Internet is the best place to find information on almost everything. 2. Information on the Internet is usually quite accurate. 3. The government needs to control the kind of information that can be on the Internet. Every student should have a laptop computer and an Internet connection.

高级视听说Unit_2-Chapter_4_new

B. Task 1--Connecting the ProcessViruses, worms, Trojans! It seems that every week there is something in the news about these invaders that make your computer "sick.“ These invaders often do very harmful things, such as delete files, access your personal data, or use your computer to attack other computers. Viruses can spread and infect other computers very quickly. It's possible for a virus to go around the world in minutes. There are several things you can do to protect your computer equipment against these invaders, but one of the most important is to have good antivirus software. If you use the Internet at all, or if you ever borrow a floppy disk from anyone, you almost certainly need to have antivirus software. Listen to a talk about how to choose the best antivirus software for you. Fill in the missing transitional cues.

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