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    精英家教网 > 高中英语 > 题目详情
    Be careful when you surf the Internet．If you download a virus into your computer ______, you will not open your files．
    A．on purposeB．by accidentC．at randomD．on average
    B
    词组辨析题。上网时小心些，如果你偶然下载病毒进入你的电脑你的文件会无法打开。A．on purpose 故意          B．by accident 偶然   C．at random 随机         D．on average 平均   根据语境选B
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