撬装电缆较车及电缆/钢丝绞车的用途?
参考答案:
用于对油,水井进行地面直读式电子压力计试井,或进行机械式压力计,井下储存式电子压力计试井以及其它用钢丝,电缆进行的测试项目。
选词填空。
1. Where ___________ (is, are) you from?
2. Who ___________ (is, am) I?
3. I am seven ___________ (years, year) old.
4. I am ___________ (in, at) school.
5. I ___________ (eat, see) with my mouth.
6. I ___________ (walk, hear) in the park.
7. What ___________ (do, is) you see?
8. This ___________ (is, are) my nose.
9. I ___________ (have, am) a green pen.
10. I ___________ (see, am) your pencil.
事故追查中的“四不放过”原则是什么?