單項選擇題Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（）
A.Keep the plant running all time
B.Start another blower
C.Increase the ratio of circulated to fresh air
D.Reduce the seawater flow to the condenser
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1.單項選擇題Under normal conditions, the quantity of air circulation becomes less and less.What is the reason?（）
A.dirty delivery ducts
B.too much refrigerant
C.the fouling filters
D.high temperature outside
2.單項選擇題（）is used in typical marine pattern self-contained unit.
A.a water cooled condenser
B.a slop tank
C.a expansion tank
D.a centrifugal pump
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