A.Magnetic field at the North Pole
B.Gulf Stream
C.Earth's rotation
D.Arctic cold fronts
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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
A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned
最新試題
Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.
The southeast trade winds actually blow toward the（）.
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
Wen a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）（）.
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
The direction of prevailing winds in the Northern hemisphere is caused by the（）.
The passing of a low pressure system can be determined by periodically checking the（）.
When experiencing heavy winds，you should reef sails to（）.
In regions near the poles，the winds are generally described as（）.
In the Northern Hemisphere，an observer at point II in the weather system should experience a wind shift from the（）.