蒸压粉煤灰砖可用于（）建筑的墙体和基础。
A.工商业
B.农业
C.工业
D.军用
E.民用
参考答案：C, E
It's a good habit _____ breakfast every day. [ ]
A. had
B. have
C. to have
D. having
肺结核干酪样坏死破溃入胸腔可引起（）.
A.喉、肠结核
B.脓气胸
C.肺心病
D.脑膜结核
E.支气管扩张症
