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题目材料：
In 1985 the median income of families headed by people with high school diplomas as a fraction of the median income of families headed by people with graduate degrees was closest to which of the following?
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A.$$\frac{1}{3}$$
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B.$$\frac{3}{7}$$
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C.$$\frac{4}{7}$$
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D.$$\frac{2}{3}$$
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E.$$\frac{5}{7}$$
C显示答案
