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【单选题】
“配第-克拉克定理”指出,随着经济的发展,人均国民收入水平的提高,第一产业国民收入和劳动力的相对比重逐渐( );第二产业、国民收入和劳动力的相对比重(),经济进一步发展,第三产业国民收入和劳动力的相对比重也开始( )。A.
上升、上升、下降
B.
上升、下降、上升
C.
下降、上升、上升
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B.
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C.
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