单项选择题

What occurs when rising air cools the dew point?（）

A.advection fog forms
B.humidity decrease
C.wind increase
D.Cloud form

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单项选择题
（）means an observed situation where objective evidence indicates the non-fulfillment of a specified requirement.

A.Conformity
B.Non-conformity
C.Observation
D.Major non-conformity
单项选择题
（）water is the water in the hold to keep the ship’s stability.

A.Bilge
B.Ballast
C.Slop
D.Sanitary
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