A.95% B.98% C.96% D.99.5%
A.15% B.48.3% C.20% D.45%
A.大孔強(qiáng)酸性陽(yáng)離子交換樹(shù)脂 B.大孔強(qiáng)酸性陰離子交換樹(shù)脂 C.凝膠型陽(yáng)離子交換樹(shù)脂 D.大孔弱酸性陽(yáng)離子交換樹(shù)脂