—I forgot to bring my English book. May I use yours? 

—_______. [ ]

A. I don't know

B. you can't

C. Here you are

D. No, you can ask him

大型汽轮发电机定子绕组端部的紧固很重要，因为当绕组端部受力时，最容易损坏的部件是（ ）。

A．出槽口处

B．焊接接头部分

C．线圈换位部分

D．直槽部分