6,7,5,8,4,9,()
A.5
B.10
C.3
D.4
:2/13,4/11,2/3,8/7,2,()。A.4/5B.4C.5/3D.3
6,7,5,8,4,9,()A.5B.10C.3D.4
6,7,5,8,4,9,()A.5B.10 C.3D.4
6,7,5,8,4,9,()A.5B.10C.3 D.4
乳膏剂酸碱度一般控制在pH在A.4.2~11.0B.3.5~7.3C.4.4~8.3D.5.1~8.8E.6.3~9.5