单选题
编号：2578866
1.Whatisthefunctionofthechillersinatraditionalair-conditioningsystem?
- A.Theypumptheaircontinuouslytotheunitsineachroom.
- B.Theylowerthetemperatureofthewaterinthesystem.
- C.Theyhelpthewatercooldownnaturallyontheroof.
- D.Theygraduallycleanthewaterasitflowsthroughthebuilding.