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        1. 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.a(chǎn)t randomD.on average
          B
          詞組辨析題。上網(wǎng)時小心些,如果你偶然下載病毒進(jìn)入你的電腦你的文件會無法打開。A.on purpose 故意          B.by accident 偶然   C.a(chǎn)t random 隨機(jī)         D.on average 平均   根據(jù)語境選B
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