单项选择题
A.Backing (of wind) B.Beach (to) C.Veering (of wind) D.Maintaining direction of the wind
A weather map is a synoptic data because it（）.A.summari...
单项选择题A weather map is a synoptic data because it（）.
A.summarizes a great deal of information B.can be interpreted accurately C.appears daily D.is prepared by the Weather Bureau
A weather forecast states that the wind will commence b...
单项选择题A weather forecast states that the wind will commence backing. In the Northern Hemisphere，this would indicate that it will（）.
A.shift in a clockwise manner B.shift in a counterclockwise manner C.continue blowing from the same direction D.decrease in velocity
A tropical wave is usually preceded by（）.A.tropical sto...
单项选择题A tropical wave is usually preceded by（）.
A.tropical storms B.good weather C.heavy rain and cloudiness D.heavy seas
