单选题The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the（）.Aabsolute humidityBrelative humidityCspecific humidityDtotal humidity
单选题
The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the（）.
A
absolute humidity
B
relative humidity
C
specific humidity
D
total humidity
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