36.飲用水之水質標準中,砷(As)之化學標準為多少毫克/公升?
(A)0.01
(B)0.05
(C)0.25
(D)0.5
答案:登入後查看
統計: A(772), B(205), C(22), D(31), E(0) #856896
統計: A(772), B(205), C(22), D(31), E(0) #856896