采用综合机械化采煤,煤层倾角大于()时,液压支架必须采取防倒、防滑措施。
A、15°
B、20°
C、30°
参考答案:A
用所给词的正确形式填空。
1. May I _____ (use) your rubber?
2. Can you_____ (turn) on the lights for me?
3. I will do what I can _____ (cheer) my friend up.
4. _____ (friend), I go home by bus.
5. I want go know what _____ (do) next.
6. These clothes _____ (make) of cotton.
7. The blue jeans are _____ (suit) for you.
8. The jumper matches _____ (good) with her white trousers.
9. Do you like_____ (go)_____ (shop)?
10. Dogs_____ (not wear) clothes.
决定哪些信息是组织需要向媒体发布的信息,属于媒体管理机构的职能中的()
A.管理职能
B.协调职能
C.对内职能
D.对外职能