A.apparent wind speed onlyB.true wind speed and true wi……

单项选择题Altocumulus clouds are defined as（）.

A.high clouds
B.middle clouds
C.low clouds
D.vertical development clouds

单项选择题Above-normal tides near the center of a hurricane maybe caused by the（）.

A.high barometric pressure
B.jet stream
C.storm surge
D.torrential rains

单项选择题A very light breeze that causes ripples on a small area of still water is a（）.

A.cat's paw
B.hog's breath
C.williwaw
D.chinook

单项选择题A thin，whitish，high cloud popularly known as mares tails is（）.

A.altostratus
B.stratus
C.cumulus
D.cirrus

单项选择题A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is a（）.

A.Papagayo
B.fall wind
C.foehn
D.williwaw