2. 外语
  3. From 1948 to 1961, the proportion of American blacks earning less than $3,000 a year declined from 78 to 47 percent; at the same

From 1948 to 1961, the proportion of American blacks earning less than $3,000 a year declined from 78 to 47 percent; at the same

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问题 From 1948 to 1961, the proportion of American blacks earning less than $3,000 a year declined from 78 to 47 percent; at the same time, blacks earning more than $10,000 increased______from less than 1 to 17 percent.(proportion)
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答案proportionally
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