This is ________ apple. It's ________ red apple.[ ]
A.a, a
B.a, an
C.an, a
D.an, an
答案:C
什么是双排脚手架?
下列要求在21℃的水中3分钟即可崩解分散的片剂是
A.泡腾片
B.薄膜衣片
C.舌下片
D.分散片
E.溶液片