A.Steady，light to moderate winds
B.Frequent calms
C.Clear skies
D.Low humidity
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A.Magnetic field at the North Pole
B.Gulf Stream
C.Earth's rotation
D.Arctic cold fronts
A.Coming cold weather conditions
B.A warm front weather condition
C.High pressure conditions
D.Scattered cumulus cloudsduring the day
A.light，variable winds with little or no humidity
B.strong，gusty winds that blow from the same general direction all year
C.steady winds that reverse direction semiannually
D.strong，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
A.forest fires
B.smoke from industrial areas
C.dust or sand storms
D.water droplets with the relative humidity more than 95%
A.clockwise direction
B.northeasterly direction
C.northerly direction
D.counterclockwise direction
最新試題
In the relatively calm area near the hurricane center，the seas are（）.
In the Northern Hemisphere，if your vessel is in a hurricane’s navigable semicircle it should be positioned with the wind on the（）.
When experiencing heavy winds，you should reef sails to（）.
Steady precipitation is typical of（）．
When a tornado moves over the water from land it is called a（）.
Monsoons are characterized by（）.
The doldrums are characterized by（）.
Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.
Two well-developed high pressure areas may be separated by a（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.