空腹时，听诊出现震水音，可见于
A．幽门梗阻B．肾病综合征C．结核性腹膜炎D．肝硬化E．急性肠炎
参考答案：A
对于圆管紊流粗糙区来说( )。
A．沿程损失系数λ与雷诺数Re和相对糙度是k/d有关
B．沿程损失系数λ只与相对糙度k/d有关
C．沿程损失hf与速度υ的一次方成正比
D．沿程损失系数λ与雷诺数Re有关
________ more energy to my study instead of being crazy about Internet games, I would be sitting in a comfortable office now.
A．If I devoted
B．Had I devoted
C．Would I be devoted
D．Should I be devoted
