Pre-reading Activity
Ⅰ.Below are some possible symptoms of a virus.Translate them into Chinese.
1.System becomes very slow.
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2.A minute after starting the computer,it will turn itself off and then on again.
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3.Your password is changed without notice.
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4.You lose some file,but you did not delete.
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5.Other people know your password or other private information.(www.xing528.com)
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6.A program disappears after you run it.
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Ⅱ.Match the following viruses with their Chinese meanings.
1.Trojan horse a.玩笑和恶作剧
2.Backdoor b.黑客工具
3.Worm c.特洛伊木马
4.Joke d.蠕虫
5.Hacktool e.冲击波
6.Blaste f.后门程序
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