对于圆管流来说,直径d=50mm,流量为0.002m3/s,则断面平均流速为( ) 发布时间:2018-01-12 01:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 对于圆管流来说,直径d=50mm,流量为0.002m3/s,则断面平均流速为( )。A.2.04m/sB.2.08m/sC.3.76 m/sD.1.02m/s
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