采用模压法或机压法制备（）
A.水溶性颗粒剂
B.酒溶性颗粒剂
C.混悬性颗粒剂
D.块状冲剂
E.泡腾性颗粒剂
参考答案：D
(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
A．while
B．when
C．as
D．before
要复制Word文章某一段的格式，应使用（）。
