Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be （） to maintain ambient conditions within the comfort zone by air conditioning.<br>A:possible<br>B:necessary<br>C:practicable<br>D:impracticable

Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be （） to maintain ambient conditions within the comfort zone by air conditioning.
A:possible
B:necessary
C:practicable
D:impracticable

出自：海船船员证

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