恒定流变直径管,直径d1=320mm,d2=160mm,流速v1=1.5m/s,

练习题库2022-08-02  35

问题 恒定流变直径管,直径d1=320mm,d2=160mm,流速v1=1.5m/s,v2为( )。A.3m/sB.4m/sC.6m/sD.9m/s

选项 A.3m/s
B.4m/s
C.6m/s
D.9m/s

答案 C

解析
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