单项选择题
What benefit is a weather bulletin to a mariner（）.
A.It provides a legal reason to cancel a projected voyage
B.It allows the mariner to make long term weather forecasts
C.It is of little benefit since the weather changes frequently and rapidly
D.It gives the mariner time to prepare for weather changes
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单项选择题
West backing south-west gale 8 locally storm 10（）then rain or sleet mainly good.
A.windy showers
B.showers with winds
C.wintry showers
D.showery winds -
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 -
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
