采用抽出式通风方式时,吸入口到工作面的距离小于有效吸程,(),不得采用抽出式。
A、煤巷
B、半煤岩巷
C、无瓦斯涌出的岩巷
D、有瓦斯涌出的岩巷
参考答案:A, B, D
This is challenging job I mentioned to you the other day. Have you had anyone in mind for it now?
A.a, the
B.the;/
C.the, the
D.a:/