A.濃硫酸 B.稀堿 C.稀釋劑
A.0.1 B.0.001 C.1 D.10
A.8-10 B.10-12 C.15-20 D.20-30
A.0.1-0.5% B.1-1.5% C.大于2%
A.30--40 B.40--50 C.50--60 D.80--90