第16题: [单项选择]以下关于病毒的描述中，正确的说法是 A. 只要不上网，就不会感染病毒 B. 只要安装最好的杀毒软件，就不会感染病毒 C. 严禁在计算机上玩电脑游戏也是预防病毒的一种手段 D. 所有的病毒都会导致计算机越来越慢，甚至可能使系统崩溃 参考答案:C 答案解析:[解析] 病毒的传播途径很多，网络是一种，但不是惟一的一种；再好的杀毒软件都不能清除所有的病毒；病毒的发作情况都不一样。
第25题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard.A) Disturbed. C) Delighted. B) Indifferent. D) Annoyed. 参考答案:D 答案解析:[听力原文] M: I hope you can understand why I’ve decided to leave this company. I do need to get a mo
第35题: [单项选择]In the United States today______. A. alcoholism has caused a million automobile accidents a year B. there are no more than a million alcoholics C. the problem of alcoholism costs thousands of millions of dollars every year D. alcoholism is not a major social problem 参考答案:C 答案解析:见原文第三段最后一句，“Their health care needs，car accidents，reduced job performance and other problems cost th
