新版输气工（初级）

AD007工业设备上的铭牌所标的额定电压、电流均指() 。

发布于 2021-04-19 22:41:54

【单选题】
A 平均值
B 有效值
C 最大值
D 最小值

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马小宇

这家伙很懒，什么也没写！

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