药品类易制毒化学品包括（）
A.麻黄素
B.伪麻黄素
C.去甲麻黄素
D.消旋麻黄素
参考答案：A, B, C, D
— How come a simple meal like this costs so much?
— We have _______ in your bill the cost of the teapot you broke just now.[ ]
A. added
B. included
C. gained
D. contained
低瓦斯矿井瓦斯涌出量满足的条件是（）。
A.2m
B.5m
C.10m
D.15m
