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单选题
On a working copy of a weather map，a cold front is represented by what color line? （）
A
Red
B
Blue
C
Alternating red and blue
D
Purple
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考题
单选题An occluded front on a weather map is colored（）.A
blue lineB
purple lineC
dashed blue lineD
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考题
单选题Cyclones tend to move（）.A
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单选题A long journey in cold weather is dreadfully tiring.A
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Selected Worldwide Marine Weather BroadcastsB
your local newspaperC
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summarizes a great deal of informationB
can be interpreted accuratelyC
appears dailyD
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考题
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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