A.0.5μm B.1μm C.2μm D.5μm
A.8%~12%HCl溶液 B.10%NaCl+2%NaOH溶液 C.8%~12%NaOH溶液 D.10%NaCl+2%HCl溶液
A.受到鐵重度污染 B.受到鐵中度污染 C.受到中度有機物污染 D.受到重度有機物污染