问题
单项选择题
When compared to air temperature,which factor is most useful in predicting fog?（）
A.Vapor pressure
B.Dew point
C.Barometric pressure
D.Absolute humidity
答案
参考答案：B
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When compared to air temperature,which factor is most useful in predicting fog?（）
A.Vapor pressure
B.Dew point
C.Barometric pressure
D.Absolute humidity
参考答案：B