单选题:按实物工作量计算运输业劳动生产率时,需要掌握( )和运输业从业人员平均人数的数据。

题目内容:
按实物工作量计算运输业劳动生产率时,需要掌握( )和运输业从业人员平均人数的数据。 A.运输换算周转量
B.运输收入
C.运输业生产人员平均人数
D.多元经营收入

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