单项选择题
Because the flow rate of supply water pump is too large, oily water separator does not work wellWhich of the following is not the reason?（）
A.the monitoring equipment is out of order
B.separating effect becomes bad
C.inner wall is contaminated
D.separating effect becomes bad and inner wall is contaminated
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相关考题
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单项选择题
When starting air-conditioner in the winter, we should open（）in sequence. Ⅰ.alve of warming Ⅱ.alve of humidifier Ⅲ.an
A.Ⅲ-Ⅱ-Ⅰ
B.Ⅲ-Ⅰ-Ⅱ
C.Ⅰ-Ⅲ-Ⅱ
D.Ⅱ-Ⅲ-Ⅰ -
单项选择题
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 -
单项选择题
The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.
A.decreased
B.increased
C.fixed
D.closed
