Be careful when you surf the Internet．If you download a virus into your computer

题干

Be careful when you surf the Internet．If you download a virus into your computer ______, you will not open your files．

A．on purpose

B．by accident

C．at random

D．on average

上一题下一题 0.64难度单项选择更新时间:2010-11-02 10:25:36

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