What should you do to protect your computer from a virus?You must make sure tha

游客2024-07-23  11

问题 What should you do to protect your computer from a virus?
You must make sure that you have an ______ .
[br] How do you know that your computer is infected?
You know it by ______ your computer for virus with a software program.

选项

答案 scanning

解析 从原文“you may think you have a virus, but how do you rely tell? You scan your system for viruses with a software program”可以得到答案。题干中scan作by的宾语,所以转化为scanning。
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