下列哪些是滴丸剂常用的水溶性基质()
A.PEG4000
B.肥皂类
C.硬脂酸钠
D.甘油明胶
E.硬脂酸
参考答案:A, B, C, D
解析:硬脂酸是脂溶性基质。
The head office of the bank is in Beijing, but it has _____ all over the country. [ ]
A. companies
B. branches
C. organizations
D. businesses
不燃材料:系指加热至约750℃时既不燃烧,亦不产生足量的造成自燃的()的材料。