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问题详情

The air-conditioner is running in the winter and to be stopped, we should（）

A、close Fan and Humidifier at the same time

B、firstly close Fan and then close humidifier immediately

C、firstly close humidifier and then close Fan immediately

D、firstly close humidifier and then close Fan after 30 second

时间：2022-01-03 10:59 关键词：船舶电气与船舶安全

答案解析

D

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