单项选择题
A.vertical air movements B.heavy rainstorms C.horizontal air movements D.any movement of moist air
A（）is created by a pressure gradient or slope in the wa...
单项选择题A（）is created by a pressure gradient or slope in the water level.
A.gradient current B.density current C.swift current D.torrent current
（）is the most widespread type likely to be encountered ...
单项选择题（）is the most widespread type likely to be encountered at sea and is caused by relatively warm air being cooled by flowing over a cooler sea surface.
A.FRONTAL FOG B.MIXING FOG C.ADVECTION FOG D.RADIATION FOG
（）is a type of fog occurring close to the sea surface w...
单项选择题（）is a type of fog occurring close to the sea surface when the air is dry and cold-probably at least 9℃ below the sea surface temperature.
A.MIXING FOG B.ADVECTION FOG C.RADIATION FOG D.ARCTIC SEA SMOKE
