A.Pressure gradient
B.Coriolis effect
C.Aurora borealis
D.Ballistic deflection
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A.Steady，light to moderate winds
B.Frequent calms
C.Clear skies
D.Low humidity
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%
最新試題
In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.
In the relatively calm area near the hurricane center，the seas are（）.
Steady precipitation is typical of（）．
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（）.
The passing of a low pressure system can be determined by periodically checking the（）.
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.
Two well-developed high pressure areas may be separated by a（）.
What kind of pressure systems travel in easterly waves（）.
When a hurricane passes into high latitudes over colder water and the source of heat is disrupted，the storm assumes the characteristics of（）.