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【单选题】
下列四组湿空气状态参数中，( )组的两个状态参数是相互独立的。A.
焓i，湿球温度ts
B.
含湿量d，露点温度t1
C.
湿球温度ts，饱和水蒸气分压力Pqb
D.
饱和水蒸气分压力Pqb，焓i
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