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[主观题]
圆管层流运动,实测管轴线上流速为0.8m/s,则断面平均流速为()m/s。A.0.1B.0.2C.0.3D.0.4
圆管层流运动,实测管轴线上流速为0.8m/s,则断面平均流速为()m/s。
A.0.1
B.0.2
C.0.3
D.0.4
查看答案
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圆管层流运动,实测管轴线上流速为0.8m/s,则断面平均流速为()m/s。
A.0.1
B.0.2
C.0.3
D.0.4
A.8
B.4
C.16
D.10
A.1.0
B.1/3
C.1/4
D.1/2
A.2.93r0
B.0.293r0
C.5.86r0
D.0.586r0