圆管层流,实测管轴线上流速为4m/s,则断面平均流速为()
2023-06-21
圆管层流,实测管轴线上流速为4m/s,则断面平均流速为()
A.4m/s;
B.3.2m/s;
C.2m/s;
D.1m/s。
参考答案:
C
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