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    When your computer begins to run slow, it is a that it has been attacked by computer virus. A. signal B. symbol C. reality D. character 【查看更多】

     

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    When your computer begins to run slow, it is a ______ that it has been attacked by computer virus.     
    [     ]
    A. signal    
    B. symbol  
    C. reality  
    D. character

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    When your computer begins to run slow, it is a ______ that it has been attacked by computer virus.

     A. signal    B. symbol   C. reality   D. character

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