按药物组成分类,散剂可分为()
A.分剂量散剂和不分剂量散剂
B.单味药散剂和复方散剂
C.溶液散与煮散
D.吹散与内服散
E.内服散和外用散
参考答案:B
The little boy is dirty from head to foot because he ______ in the mud all morning.
A.has played
B.has been playing
C.is playing
D.was playing
再生时,酸、碱、盐进不了床体的原因有哪些?