A.30mm B.40mm C.45mm D.90mm
A.13mm B.17mm C.15mm D.20mm
A.強酸陽離子交換樹脂 B.弱酸陽離子交換樹脂 C.強堿陰離子交換樹脂 D.弱堿陰離子交換樹脂