A.0.01~0.05 B.0.05~0.1 C.0.1~0.2 D.0.05~0.2
A.10 B.15 C.25 D.50
A.NaOH固體 B.40%NaOH溶液 C.30%NaOH溶液 D.50%NaOH溶液