题目内容 (请给出正确答案)
提问人:网友f******g 发布时间:2022年3月20日 11:53
[单项选择题]

变电站的综合自动化都是按()原则设计的。

A.少人值班

B.无人值班

C.电压等级

D.功能集中

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