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有压圆管均匀流的切应力τ沿断面的分布是:()

单选题
2022-09-29 19:44
A、均匀分布
B、管壁处是零,向管轴线性增大
C、管轴处是零,与半径成正比
D、按抛物线分布
查看答案

正确答案
C

试题解析
提示:均匀流基本方程为τ=γRJ。

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