题目内容

The text tells us that Margie, a girl who is aged 11 in 2157, always _______ school because her teacher is a _______ one and she has to learn at regular hours and put her ______________________ into a slotin the ___________. It also tells us how _______ she is ___ the children who studied together, experienced ___________, and had _________ teachers about two hundred years earlier.

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文件型病毒传染的对象主要是()类文件.

A. .DBF
B. .DOC
C. .COM和.EXE
D. .EXE和.DOC

你购买了一个具有版权的软件时,就获得了这个软件的().

A. 复制权
B. 修改权
C. 出售权
D. 使用权

预防U盘感染病毒的有效措施是().

A. 定期对U盘进行格式化
B. 不要把U盘和有病毒U盘放在一起
C. 保持U盘的清洁
D. 给U盘加上写保护

计算机病毒通常分为引导区型、()、混合型和宏病毒等四类.

A. 恶性
B. 扩展名
C. 文件型
D. 潜伏型

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