单项选择题
Advection fog is most commonly caused by（）.
A.air being warmed above the dew point
B.saturation of cold air by rain
C.a rapid cooling of the air near the surface of the Earth at night
D.warm moist air being blown over a colder surface
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相关考题
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单项选择题
Advection fog holds longest over which portions of the lakes?（）
A.Northwest
B.Southeast
C.Northeast
D.Southwest -
单项选择题
A tide is called diurnal when（）.
A.only one high and one low water occur during a lunar day
B.the high tide is higher and the low tide is lower than usual
C.the high tide and low tide are exactly six hours apart
D.two high tides occur during a lunar day -
单项选择题
A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.
A.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
