A.high pressures
B.low pressures
C.weak pressures
D.strong pressures
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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
A.a certain area
B.all ocean areas
C.some areas
D.important areas
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
A.Upwind
B.Downwind
C.Crosswind
D.Downcurrent
A.short confused swells
B.gradually increasing white clouds (mare's tails)
C.pumping barometer
D.continuous fine mist-like rain
最新試題
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere.What action should you take to avoid the storm（）.
The wind is（）and decreasing.
If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
When a tornado moves over the water from land it is called a（）.
The passing of a low pressure system can be determined by periodically checking the（）.
In regions near the poles，the winds are generally described as（）.
Steady precipitation is typical of（）．