单选题（） is the circulation and refreshing of the air in a space without necessarily a change of temperature.ARefrigerationBAir conditioningCVentilationDHeating
单选题
（） is the circulation and refreshing of the air in a space without necessarily a change of temperature.
A
Refrigeration
B
Air conditioning
C
Ventilation
D
Heating
参考解析
解析：
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