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【单选题】
投入某种物质商品生产过程中的活劳动量不变，如果劳动生产率提高，在单位劳动时间内生产的商品数量和单位商品的价值量的变化表现为( )。A.
商品数量增加，价值量不变
B.
商品数量不变，价值量增大
C.
商品数量增加，价值量减少
D.
商品数量增加，价值量增大
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A.
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B.
punished
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A.
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A.
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B.
common；surrounded
C.
ordinary；surrounding
D.
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