问题
单项选择题
大量实验证明，沿程水力摩阻系数与雷诺数和（）有关。
A．管道长度
B．流体运动的平均流速
C．管子的内径
D．管路的平均绝对粗糙度
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
大量实验证明，沿程水力摩阻系数与雷诺数和（）有关。
A．管道长度
B．流体运动的平均流速
C．管子的内径
D．管路的平均绝对粗糙度
参考答案：D
请根据下 * * 位同学的描述，从A-E中为他们选择合适的社团。 小题1:Alice likes painting, but she can’t paint well. 小题2:Dave loves singing. He can play the violin, but he’s not good at it. 小题3:France likes playing tennis, soccer and basketball. He wants to play them every week. 小题4:Tina has a friend in China. She wants to see her soon, but she can only speak English. 小题5:Helen is a good runner. She wants to run with other students every day.
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