A.A backing wind
B.A veering wind
C.Sustained gale force winds
D.A strong wind that maintains a constant speed and direction
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A.A backing wind
B.A veering wind
C.A norther
D.A strong，gusty wind
A.wind direction remains steady
B.wind speed increases
C.barometer falls
D.All of the above
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
最新試題
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
When a hurricane passes into high latitudes over colder water and the source of heat is disrupted，the storm assumes the characteristics of（）.
Two well-developed high pressure areas may be separated by a（）.
The moisture equilibrium chart can be used to determine the（）.
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（）.
Tropical cyclones are classified by form and intensity.Which system does not have closed isobars（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
When experiencing heavy winds，you should reef sails to（）.
In the relatively calm area near the hurricane center，the seas are（）.