千分尺的形式类别较多，但都是用（）方法把回转运动变为直线运动，获得有限测量。
A、精密螺杆
B、多头螺杆
C、梯形螺杆
D、矩形螺杆
参考答案：A
把括号中的字母组成一个动词填在横线上，使句意完整。
1. I ______________ (v h a e) a new bag.
2. The bird can ______________ (g i n s) many songs.
3. ______________ (i s t) down, please.
4. I ______________ (a n t w) to buy some bananas for my mother.
5. I ______________ (v l o e) China very much.
6. Let's ______________ (a n e d c) together.
7. What ______________ (e s o d) your cat like?
8. Jane and Jones ______________ (u y d s t) in the same school.
9. The room is very dark. Please ______________ (r n t u) on the light.
10. When you ______________ (e t e m) an old man on the bus, you should give your seat to him.
收集证人证言，应个别进行，不得采用开座谈会形式（）
