单选题:下列流水施工参数中,均属于时间参数的是(  )。

题目内容:
下列流水施工参数中,均属于时间参数的是(  )。 A.流水节拍和流水步距
B.流水步距和流水强度
C.流水强度和流水段
D.流水段和流水节拍

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