题目内容

A,B相互独立，则A,B互不相容.

A. 对
B. 错

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A,B非空，且A,B对立，则A,B相互独立.

A. 对
B. 错

如果让ping命令一直ping某一个主机,应该使用()参数。

A. -t
B. -a
C. -f
D. -s

把储存在之上的文件或文件夹删除到“回收站”,并能在清空“回收站”之前能还原的存储媒体有()

A. 网络硬盘
B. 优盘
C. 软盘
D. 硬盘

III. There are 10 incomplete sentences in this part. For each sentence there arefour choices marked A), B), C) and D). Choose the one that best completes thesentence.My journey back to my hometown seemed slow because the train stopped _________ at different villages.

A. gradually
B. continually
C. continuously
D. unceasingly