A.wind direction remains steady
B.wind speed increases
C.barometer falls
D.All of the above
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A.bring the sails parallel to the wind
B.reduce sail area exposed to the wind
C.allow the sails to catch more wind
D.remove all tension on the main and jib sheets
A.Tornado
B.Waterspout
C.Hurricane
D.Cyclone
A.High pressure area
B.Extratropical low-pressure system
C.Tropical storm
D.Easterly wave
A.a high pressure area
B.an extratropical cyclone
C.a tropical storm
D.an easterly wave
A.High pressure
B.Low pressure
C.Subsurface pressure
D.Terrastatic pressure
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The southeast trade winds actually blow toward the（）.
The passing of a low pressure system can be determined by periodically checking the（）.
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
The moisture equilibrium chart can be used to determine the（）.
In the relatively calm area near the hurricane center，the seas are（）.
What is the first visible indication of the presence of a tropical cyclone or hurricane（）.
Monsoons are characterized by（）.
Two well-developed high pressure areas may be separated by a（）.
When a tornado moves over the water from land it is called a（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.