【名词&注释】
北极星(polaris)、电气设备(electrical equipment)、主要内容(main contents)、碳化钙(calcium carbide)、固定式(fixed)、救生艇(boat)、北半球(northern hemisphere)、工作中
[单选题]Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?
A. Cooling the air to a temperature just above dew point
B. Heating the air to a point at which moisture will boil off ,then re-cooling it
C. Cooling the air to a point below dew point, then reheating it
D. Heating the air and then cooling it to a point below dew point
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