相关考题
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单项选择题
（）is an indication that the weather is about to clear.
A.Rising clouds
B.Lowering clouds
C.Thickening clouds
D.Scattering clouds -
单项选择题
（）is formed when the droplets or ice crystals in clouds have become sufficiently large to fall to the ground.
A.Humidity
B.Temperature
C.Precipitation
D.Wind -
单项选择题
（）reters to be amount of water vapour in the air.
A.Humidity
B.Temperature
C.Precipitation
D.Wind
