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问题 单项选择题

据中国互联网络大赛组委会调查，中国（）以上的未上网者对网络充满兴趣，平均每个网民认识的人中有4到5个人准备在近期上网。

A.30%

B.50%

C.70%

D.90%

答案

参考答案：C

单项选择题

Mobile computers-which (71) laptops, notebooks, subnotebooks and handhelds- (72) so ubiquitous in such a short time, no surprise to hear who say: "It will define the leading edge (73) the next five years or so." The most remarkable (74) mobile computers is the amount of data storage and memory packed (75) their tiny boxes. These devices not only handle windows easily but also run storage-hungry programs.

（75）处是（）

A.from

B.for

C.about

D.at

E.on

F.into
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问答题 简答题

使用干粉灭火器应注意什么问题？
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