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题目材料：
If the average temperature for Years X and Y in Baltimore is equal to the average of that city's high and low temperatures for each of those years, then what is the average of the low temperatures for Baltimore in Years X and Y ?
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A.–9° F
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B.11° F
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C.20° F
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D.44° F
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E.It cannot be determined from the information given.
C显示答案
