13.下列酸性物質何者可使酸性過錳酸鉀溶液褪色?
(A)H2C2O4
(B) HCIO4
(C)H3PO4
(D)H2SO4

答案:登入後查看
統計: A(10), B(1), C(0), D(0), E(0) #2268313