单选题A heated bulkhead has the effect on a hygroscopic commodity of（）.Acausing moisture to accumulate against the bulkheadBlowering the vapor pressure of the commodityClowering the dew point of the airDraising the vapor pressure of the commodity
单选题
A heated bulkhead has the effect on a hygroscopic commodity of（）.
A
causing moisture to accumulate against the bulkhead
B
lowering the vapor pressure of the commodity
C
lowering the dew point of the air
D
raising the vapor pressure of the commodity
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