题目内容
Viruses often have damaging side effectssometimes intentional, sometimes not.
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If a virus get into your computer, you must remove it immediately because viruses are very dangerous!
If you notice that your mouse “sticks”many times, maybe your computer has viruses.
If we use computer correctly, our computer will never get viruses.
2020年3月15日,习近平给北京大学全体( )"90后”党员回信,向他们和奋斗在疫情防控各条战线上的广大青年致以诚挚的问候。
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