单选题The expression THE AIR IS SATURATED means（）.Athe relative humidity is 100%Bthe vapor pressure is at its minimum for the prevailing temperatureCprecipitation has commencedDcloud cover is 100%
单选题
The expression THE AIR IS SATURATED means（）.
A
the relative humidity is 100%
B
the vapor pressure is at its minimum for the prevailing temperature
C
precipitation has commenced
D
cloud cover is 100%
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