安规_营销_2023年

电气工具和用具应由专人保管,每( )应由电气试验单位进行定期检查。

发布于 2021-04-24 05:25:27

【单选题】
A 3个月
B 9个月
C 6个月
D 12个月

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这家伙很懒，什么也没写！

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