单项选择题

Weather observations provided by each weather station include all of the following except（）.

A.temperature
B.visibility
C.predicted weather for the next twelve hours
D.barometric pressure and change in the last three hours

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单项选择题

Weather information is available from（）.

A.Commercial radio broadcasts
B.The Coast Guard on scheduled marine information broadcasts
C.VHF-FM continuous marine weather broadcasts provided by the National Weather Service
D.All of the above

单项选择题

Weather forecast messages are usually（）.

A.Given only to TV stations
B.Transmitted only by commercial broadcast stations
C.Broadcast in plain language
D.Broadcast immediately on VHF Channel 16 and 2182 kHz