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After a cold front passes the barometric pressure usually ______.
A.fluctuates
B.remains the same
C.remains the same, with clouds forming rapidly
D.rises, often quite rapidly, with clearing skies
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high pressure conditionsD
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单选题As it approaches，a typical warm front will bring（）.A
rising temperatures and falling barometric pressureB
falling temperature and pressureC
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rising barometric pressure and temperatures
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单选题An occluded front is caused by a(n)（）.A
low pressure areaB
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area of calm airD
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dense fog and high humidityB
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clear skies with the approach of a cold frontD
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单选题Good weather is usually associated with a region of（）.A
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A storm surgeB
A high pressure areaC
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rapidly improving weatherB
deteriorating weatherC
a severe low pressure systemD
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单选题On the approach of a warm front the barometric pressure usually（）.A
fallsB
risesC
is steadyD
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单选题Cyclones that have warm sectors usually move（）.A
westerlyB
parallel to the isobars in the warm sectorC
toward the nearest high pressure areaD
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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 the passage of a cold front the visibility（）.A
does not changeB
improves rapidlyC
improves only slightlyD
becomes poor
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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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单选题Brief，violent showers frequently accompanied by thunder and lightning are usually associated with（）.A
passage of a warm frontB
passage of a cold frontC
winds shifting counterclockwise in the Northern HemisphereD
stationary high pressure systems
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