单选题The（） only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.Acentral air condition systemBhigh velocity systemClow velocity systemDsingle duct system
单选题
The（） only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.
A
central air condition system
B
high velocity system
C
low velocity system
D
single duct system
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