“药物在沸水中浸煮短暂时间,取出分离或除去皮”的炮制工艺是
A.蒸法
B.煮法
C.燀法
D.复制法
E.发酵法
参考答案:C
解析:焊法是高温短时间浸煮,主要是杀酶保苷,分离种皮。
— My parents have been to Hongkong.
— Really? When ______ there? [ ]
A. have they gone
B. have they been
C. did they go
D. will they go
钴60对铅的半值层为10mm,假设在30mm厚的铅板射线源侧辐射剂量为64R/h,则在其背面应为多少?()
A、8R/h
B、21.33R/h
C、32R/h
D、16R/h