A.1號,2號;0.1mol/L B.2號,3號;0.1mol/L C.2號,3號;0.01mol/L D.1號,2號;0.01mol/L
A.S>212 B.150<S≤212 C.90<S≤150 D.S<90
A.15 B.18 C.20 D.23