错误:
CH3CHOHCH3 %2B KMnO4 %2B H2SO4 %3D CH3COOH %2B MnSO4 %2B K2SO4 %2B H2O
^
不需要的字符 ('%')CH3CHOHCH3 %2B KMnO4 %2B H2SO4 %3D CH3COOH %2B MnSO4 %2B K2SO4 %2B H2O
^
不需要的字符 ('%')