()isaprocessinwhichthetemperatureofaspaceoritscontentsisreducedtobelowthatoftheirsurroundings。 A、VentilationB、RefrigerationC、AirconditioningD、Heating

()isaprocessinwhichthetemperatureofaspaceoritscontentsisreducedtobelowthatoftheirsurroundings。

A、Ventilation

B、Refrigeration