大学体验英语综合教程2课后问题详解及翻译

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3. We won’t drive this way 4. keep it a secret

5. Jane was listening to the radio Unit 8

Ex 3. 1.B 2.A 3.D 4.A 5.C

Ex 4. 1. adequate 2. vitally 3. document 4. distribution 5. urban 6. potential

7. continual 8. infecting 9. threat 10. updated

Ex.5 1. let down 2. came across as 3. in the back of …mind 4. as a matter of course 5. cleaning up

Ex.6 1. encountered 2. detected 3. transmitted 4. pirated 5. inflicted Ex 7. 1. In pursuit of a healthier diet, people are eating more fish than they used to.

2. We need to have the roof repaired before the bad weather sets in. 3. The disease is spreading, and all young children are at risk.

4. The information is transmitted from one computer to another through a telephone line.

5. Jack is a fairly good runner. He wins more often than not. Ex 8.

1. It sounds like this high-tech company has put in place many favorable measures to protect against brain drains.

2. The worry comes when paper-mills ignore the environmental pollution in pursuit of profits. 3. It’s vitally important that one attend a test-preparation class before taking a TOEFL test but this cannot be a one-off event if he really want to have a good command of English.

4. The potential threat should always be in the back of a doctor’s mind and appropriate measures should be taken in no time once emergency arises. 5. In the end, science and education are the keys to a prosperous county and this is a continual process. Ex 9.

Computer viruses can be transmitted via email attachments. They also spread through software downloaded from the internet. So when you are downloading the unlicensed and pirated software, you are likely to put your computer at risk. The software can seem harmless enough, but they could easily be harboring a dangerous virus.

To protect against computer viruses, we should be careful when opening email attachments and downloading software. We should use antivirus software and update it regularly. As for companies, they should not only take measures by investing in antivirus software, but also pay attention to the education of their employees. While the employees may suddenly become aware of the virus threat when the threat is there, they soon forget about it as the stories disappear from the news headlines. So it is

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important that companies constantly educate the users about the virus threat and ask them to practice safe computing.

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