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问题 多项选择题

下列各项中，属于网络传输介质的有（）。

A.双绞线

B.同轴电缆

C.光缆

D.微波通信

答案

参考答案：A, B, C, D

解析：双绞线、同轴电缆和光缆都是网络的有线传输介质，微波通信属于无线传输介质。

单项选择题

Near the end of your last project，additional requirements were demanded by a group of stakeholders when they learned they would be affected by your project．This became a problem because you had not included the time or cost in the project management plan for these requirements．What is the BEST thing you can do to prevent such a problem on future projects ？（）

A．Review the WBS dictionary more thoroughly，looking for incomplete description

B．Review the project charter more thoroughly，examining the business case for“holes”．

C．Do a more thorough job of contract plannin

D．Pay more attention to stakeholder managemen
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单项选择题

党的先进性和党的执政地位都不是一劳永逸、一成不变的，过去先进不等于现在先进，现在先进不等于永远先进；过去拥有不等于现在拥有，现在拥有不等于永远拥有。这表明( )。

A．运动是相对的
B．矛盾双方是对立统一的，在一定条件下能相互转化
C．量变是质变的必要准备，质变是量变的必然结果
D．事物发展的总趋势并不总是向前进的
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