使用生石膏时（）
A、先煎
B、后下
C、包煎
D、冲服
E、烊化
参考答案：A
____he was not satisfied with his power.
A, King as he was B, King as was he C,A king as he was D,A king as was he
矿井井下带式输送机可以使用橡胶输送带
