單項(xiàng)選擇題Generally speaking，with（）the weather becomes cloudy or overcast with strong winds.

A.high pressures
B.low pressures
C.weak pressures
D.strong pressures


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1.單項(xiàng)選擇題For an accurate barometer check，you would（）.

A.check it with a barometer on another vessel
B.take readings from several barometers and average them
C.check it with the barometer at the ship chandlery
D.check it against radio or National Weather Service reports of the immediate vicinity

2.單項(xiàng)選擇題Fleet weather forecast messages are the expected conditions in（）.

A.a certain area
B.all ocean areas
C.some areas
D.important areas

3.單項(xiàng)選擇題Fetch is the（）.

A.distance a wave travels between formation and decay
B.stretch of water over which a wave-forming wind blows
C.time in seconds required for two crests to pass a given point
D.measurement of a wave's steepness

5.單項(xiàng)選擇題Early indications of the approach of a hurricane may be all of the following EXCEPT（）.

A.short confused swells
B.gradually increasing white clouds (mare's tails)
C.pumping barometer
D.continuous fine mist-like rain