采煤工作面支柱必须迎山有力，不得出现连续（）以上的支柱迎山角或退山角过大。
A、3
B、4
C、5
D、8
参考答案：A
最常见的肺癌肺外综合征是（）
A.肥大性肺性骨关节病
B.高钙血症
C.肌病和神经综合征
D.Cushing综合征
E.周围神经病变
— Many more people were saved!
— _____. I hope they'll be better soon. [ ]
A. Good idea
B. No problem
C. Not at all
D. Glad to hear that
