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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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
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
A.decreased
B.increased
C.fixed
D.closed
A.decreased
B.increased
C.fixed
D.closed
A.the bearing near to the diesel engine
B.the intermediate bearing near to the thrust bearing
C.the intermediate bearing near to the sterntube
D.the bearing located at the middle of the diesel engine and the sterntube
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