系统的可靠性通常用MTBF和MTTR来表示。其中MTBF的意义是______。A.每

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问题:

系统的可靠性通常用MTBF和MTTR来表示。其中MTBF的意义是______。

A.每年故障发生次数

B.每年故障维修时间

C.平均无故障时间 n)平均故障修复时间

考点:计算机等级考试网络技术三级网络技术笔试
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单词拼写

小题1:Do you have any ______________(证据)for what you said just now?

小题2:Her ________(信仰) in God is very firm.

小题3:__________(偶尔) Alice would look up from her books.

小题4:It will be to your __________(弊端,不利)if you arrive at the interview late.

小题5:At last we came to the __________(结论) that he was a cheat.

小题6:Learning to walk again after his accident required great p_________.

小题7:Einstein is a great scientific g__________.

小题8:She was a       about her daughter still being out late at night.

小题9:She was i________  badly in an accident during the work.

小题10:When you heat a metal ,it c         .

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在△ABC中,2B=A+C,且b=2,则△ABC的外接圆的半径R=______.

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每周漱口使用的是()。

A.0.02%NaF漱口液

B.0.05%NaF漱口液

C.0.2%NaF漱口液

D.1.23%NaF凝胶

E.2%NaF溶液

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干燥穖的除尘用的是旋风除尘。

题型:单项选择题

在数学计算中,7X4和4X7,是两个乘数的交换。因此,这两个过程在计算机中也是等价的。

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