A.天; B.周; C.十五天; D.月
A.除去硬度,降低堿度; B.除去硬度,堿度不變; C.除去鹽量,堿度不變; D.除去堿度,硬度不變
A.再生陰樹(shù)脂 B.再生陽(yáng)樹(shù)脂 C.分離陰陽(yáng)樹(shù)脂 D.再生陰樹(shù)脂,并用浮選法分離陰陽(yáng)樹(shù)脂