M9英译汉单项选择

When the meter shows 28 volts dc,the relay closes.

发布于 2021-02-26 19:10:14

【单选题】
A 当电表显示28伏特直流时，断路器闭合
B 当电表显示28伏特直流时，继电器闭合
C 当电表显示28伏特直流时，电磁阀闭合

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退役熬夜冠军 2023-02-26

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