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单选题
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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考题
单选题After the passage of a cold front the visibility（）.A
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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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