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问题 单项选择题

火灭自动报警系统接地装置的接地电阻值应符合：采用专用接地装置时，接地电阻值不应大于（）；采用共用接地装置时，接地电阻值应不大于（）。

A.1Ω，4Ω

B.10Ω，4Ω

C.4Ω，1Ω

D.4Ω，10Ω

答案

参考答案：C

单项选择题

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of use-cases and (71) have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions-time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (72) which is concluded with a well-defined (73) and can be further broken down into (74) - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (75) logically by nature.

（71）处填（）。

A．actors

B．artifacts

C．workers

D．scenarios
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单项选择题

下列选项中哪个方法可以判断线程是否处于活动状态

A． 0 0

B． -5 0

C． -1 6

D．0 6
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