單項選擇題

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 seconds

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單項選擇題

The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.

A.decreased
B.increased
C.fixed
D.closed

單項選擇題

The humidifier’s valve of air-conditioner should be （）, when the temperature is 5~8°C in the winter.

A.decreased
B.increased
C.fixed
D.closed

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

你可能感興趣的試題

The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.

The humidifier’s valve of air-conditioner should be （）, when the temperature is 5~8°C in the winter.

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