乙炔的分解爆炸与存放容器的直径大小有关,容器直径()越,则越容易爆炸。
A.大
B.小
参考答案:A
用适当的介词填空。
1. Look the tiger.
2. What the mother kangaroo?
3. It's hard park a car a star.
4. Why are they picking the stones?
5. Koala bears like be quiet the day; They like to eat night.
6. What do you do Sundays?
7. My sister is listening music.
自喷采油一般是在油田地下油层()较强,石油足以自喷到地面的情况下所采取的采油方式。
A、天然能量
B、人工补充能量
C、弹性能量
D、重力能量