气化炉切氧操作前,充压煤气总管和支管上的盲板分别在什么位置?
参考答案:
均处于盲位。
— Why are we always having examinations?
— _____ whether we have grasped the knowledge in every subject.
[ ]
A. Test
B. Testing
C. To test
D. Tested
西欧城市市民争取自治权斗争的典型例子发生在[ ]
A.伦敦
B.巴黎
C.罗马
D.琅城