如果水轮机工作水头高,流量大,则水轮机水流速度三角形中的绝对速度就小。
参考答案:错
The selfless village doctor treated whoever came to his family without any ____. [ ]
A. charge
B. money
C. cost
D. price
脓液绿黑稀薄者为()
A.气血充足
B.气火有余
C.血虚
D.血络受损
E.余毒日久,损伤日久