单项选择题The southeast trade winds actually blow toward the().

A.Southeast
B.South
C.East
D.Northwest


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1.单项选择题The passing of a low pressure system can be determined by periodically checking the().

A.Thermometer
B.Hygrometer
C.Barometer
D.Anemometer

2.单项选择题The moisture equilibrium chart can be used to determine the().

A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists
B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity
C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo
D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo

4.单项选择题The doldrums are characterized by().

A.Steady,light to moderate winds
B.Frequent calms
C.Clear skies
D.Low humidity

5.单项选择题The direction of prevailing winds in the Northern hemisphere is caused by the().

A.Magnetic field at the North Pole
B.Gulf Stream
C.Earth's rotation
D.Arctic cold fronts

6.单项选择题Steady precipitation is typical of().

A.Coming cold weather conditions
B.A warm front weather condition
C.High pressure conditions
D.Scattered cumulus cloudsduring the day

7.单项选择题Monsoons are characterized by().

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

8.单项选择题MIST is caused by().

A.forest fires
B.smoke from industrial areas
C.dust or sand storms
D.water droplets with the relative humidity more than 95%

9.单项选择题In the Southern Hemisphere winds in a low pressure system rotate in a().

A.clockwise direction
B.northeasterly direction
C.northerly direction
D.counterclockwise direction

10.单项选择题In the relatively calm area near the hurricane center,the seas are().

A.moderate but easily navigated
B.calm
C.mountainous and confused
D.mountainous but fairly regular as far as direction is concerned