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一只单联开关控制一盏灯时,开光应装设在( )上。
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一只单联开关控制一盏灯时,开光应装设在( )上。
A、相线
B、N线
C、相线和N线同时装设
D、保护线
时间：2021-09-01 22:45
关键词：
青书学堂
河北建筑工程学院
电气施工技术
答案解析
A
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一只单联开关控制一盏灯时,开光应装设在( )上。
两个开关控制一盏灯，只有两个开关都闭合时灯才不亮，则该电路的逻辑关系是（）。
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