单项选择题
A.Is 50% water saturated B.Is 90% water saturated C.Temperature is greater than the dew point temperature D.Temperature is equal to，or below the dew point temperature
Fetch is the（）.A.Distance a wave travels between format...
单项选择题Fetch is the（）.
A.Distance a wave travels between formation and decay B.Stretch of water over which a wave-forming wind blows C.Time in seconds required for two crests to pass a given point D.Measurement of a wave's steepness
Cyclones that have warm sectors usually move（）.A.wester...
单项选择题Cyclones that have warm sectors usually move（）.
A.westerly B.parallel to the isobars in the warm sector C.toward the nearest high pressure area D.faster than the accompanying cold front
Cumulus clouds that have undergone vertical development...
单项选择题Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.
A.clearing weather B.that a warm front has passed C.probable thunderstorm activity D.an approaching hurricane or typhoon
