A:CH3COOCH3
B:HCOOCH2CH3
C:CH3COOH
D:CH3OH
E:HCOOH
F:CH3CH2OH
G:HCOH
H:CH3CHO
I:HCOOH
J:CH3COOH
CH3COOCH3+H2O----CH3COOH+CH3OH
2CH3OH+O2----2HCHO+2H2O
2HCHO+O2----2HCOOH
HCOOCH2CH3+H2O----HCOOH+CH3CH2OH
2CH3CH2OH+O2----2CH3CHO+2H2O
2CH3CHO+O2----2CH3COOH