问题 单项选择题

The () in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.

A.illness

B.virus

C.weakness

D.attachment

答案

参考答案:B

解析:

[参考译文] 电子邮件中的病毒已感染了全球几乎每台计算机,在北美造成了多达10亿美元的损失。

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单项选择题