离心泵的叶轮在充满液体的泵壳内旋转时，叶轮表面与液体之间会产_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

离心泵的叶轮在充满液体的泵壳内旋转时，叶轮表面与液体之间会产生（）。

A.容积损失

B.水力损失

C.冲击损失

D.轮阻损失

答案

参考答案：D

填空题

stay in touch, pay back, say goodbye to, as we a

ll know, prepare for, be strict with

1. My parents _____ me in my study.
2. At that time Simon _____ the coming exam.
3. Have I _____ the money I borrowed

from you, Kate? I can't remember that now.
4. After _____ her parents, Sandy hurried to school.
5. Please call me or chat with me online. It would be nice to _____.
6. _____, China is a developi

单项选择题

弹性柱销联轴器柱销磨损量应不大于直径的（），否则报废。

A.3%

B.5%

C.10%

D.15%