当前学科:计算机专业英语
  • 题目: 选择题
    Which of the following is NOT an effective countermeasure to viruses. __________

    • A. Updating operating system regularly to patch security holes.
    • B. Marking regular backups of data on different file system.
    • C. Using different operating system on the same file system.
    • D. Installing and regularly updating anti-virus software.

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