根据句意填空

1. she’s my s______Mary.

2. This is a p______of my family.

3. I l______my mother very much.

4. She is my pen f______ Emma.

5. My father’s brother is my u_____.

6. My mother’s sister is my a______.

7. T______ are his brothers.

8. Thank you very m______.

9. S_____is my sister ,Jill.

10. —Is Lucy your d______?  

      — Yes ,she is .

轴类零件加工中常用两端中心孔作为统一的（）。