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
最新試題
In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.
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（）.
What is the first visible indication of the presence of a tropical cyclone or hurricane（）.
The passing of a low pressure system can be determined by periodically checking the（）.