A.A backing wind
B.A veering wind
C.A norther
D.A strong，gusty wind
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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
A.a high pressure area
B.an extratropical cyclone
C.a tropical storm
D.an easterly wave
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In the Northern Hemisphere，when the wind at your location is northerly，the low pressure center causing the wind is located to your（）.
The strong wind will make us（）here for some days.
What kind of pressure systems travel in easterly waves（）.
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
The passing of a low pressure system can be determined by periodically checking the（）.
The doldrums are characterized by（）.
Monsoons are characterized by（）.