单选题：What can a "malignant" virus do to your computer?

题目内容：
What can a "malignant" virus do to your computer? A．It can cause no damages at all.
B．It can cause damages to the computer systems.
C．It can copy your files in computers.
D．It can format your hard drive.
参考答案：
答案解析：

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点击开始播放听力mp3:{MP3:http://wximg.233.com/attached/media/2013080

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