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As a cold front passes an observer, pressure ______.
A.drops and winds become variable
B.rises and winds become gusty
C.drops and winds become gusty
D.rises and winds become variable
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coming cold weather conditionsB
a warm front weather conditionC
high pressure conditionsD
scattered cumulus clouds
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单选题Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.A
Expect to see cirrus clouds followed by altostratus and nimbostratus cloudsB
Alter course to remain in the navigable semicircleC
Prepare for gusty winds，thunderstorms，and a sudden wind shiftD
Expect clear weather，with steady winds and pressure，until the front passes
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单选题Monsoons are characterized by （）.A
light，variable winds with little or no humidityB
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steady winds that reverse direction semiannuallyD
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单选题An occluded front is caused by a(n)（）.A
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单选题Cumulonimbus clouds can produce（）.A
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单选题Steam smoke will occur when（）.A
extremely cold air from shore passes over warmer waterB
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cold ocean water evaporates into warm airD
cool rain passes through a warm air mass
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单选题As a cold front passes an observer，pressure（）.A
drops and winds become variableB
rises and winds become gustyC
drops and winds become gustyD
rises and winds become variable
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单选题Which of the following statements concerning frontal movements is TRUE（）.A
The temperature rises after a cold front passesB
The barometric pressure rises when a warm front passesC
A cold front generally passes faster than a warm frontD
A warm front usually has more violent weather associated with it than a cold front
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单选题If an observer in the Northern Hemisphere faces the surface wind，the center of low pressure is to his（）.A
left，slightly behind himB
right，slightly behind himC
left，slightly in front of himD
right，slightly in front of him
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单选题What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.A
Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometerB
Flat calm seas，heavy rain，light winds，and an extremely low barometerC
Flat calm seas，heavy rain，light winds，and high pressureD
Huge waves approaching from all directions，clearing skies，light winds，and high pressure
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单选题After a cold front passes the barometric pressure usually（）.A
fluctuatesB
remains the sameC
remains the same，with clouds forming rapidlyD
rises，often quite rapidly，with clearing skies
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单选题After a cold front passes，the barometric pressure（）.A
drops，and the temperature dropsB
drops，and the temperature risesC
rises，and the temperature dropsD
rises，and the temperature rises
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