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单选题
After the passage of a cold front the visibility（）.
A
does not change
B
improves rapidly
C
improves only slightly
D
becomes poor
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单选题After walking hurriedly for half an hour, I wanted to drink （）A
something coldB
cold somethingC
something with coldD
something to be cold
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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According to the information given in the passage, sulfur dioxide emissions are linked to all except which of the following phenomena?A
Reduced visibility in the eastern United StatesB
Damage to the ozone holeC
Increased rates of asthmaD
Acid rainE
Damaged forests
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