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综合视频监控系统业务指挥关系：部核心节点→（）→接入节点。上级节点负责指挥故障处理。

答案

参考答案：局区域节点

单项选择题

根据《通用安装工程工程量计算规范》有关项目编码规定，第四级编码表示（）。

A．各专业工程顺序码 

B．各分项工程顺序码 

C．各分部工程顺序码 

D．清单项目名称顺序码
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(A) 你乐于助人吗?下面是从校园杂志上摘取的有关这方面的一段文字,请根据上下文,完成短文,每空一词.(5分)
We sometimes have a special day to help others. ___1___ month we went to an old people’s home. We bought lots of delicious ___2___ for the old people. We also ___3____ some songs. The old people were very happy. We should volunteer our time to do things like that more often. ___4____ others is also helping ourselves. Do you ___5____ so?
 
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