题目内容

需求分析的任务是确定系统怎样完成它的工作。()

A. 对
B. 错

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需求分析的困难主要体现在四个方面:问题的复杂性、交流障碍、不完备性和不一致性、需求易变性。

A. 对
B. 错

Choose the best answer to complete each of the following sentences according to the information contained in the listening passage.1) The listening passage mainly shows that ________.

A. it is necessary to tell white lies in life
B. it is important to be truthful to your friend
C. most people tell white lies now and then
D. telling white lies is a way to keep friendship

路由器转发数据包的关键是( )。

A. 目的地址
B. MAC地址
C. 路由表

Preference字段在路由表中代表了( )。

A. 路由器开销
B. 路由优先级
C. 路由的度量

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