A.3.5~5.5 B.6.5 ~10.5 C.7.5~12.5 D.3.5~12.5
A.KMnO4 B.K2CrO4 C.MnO2 D.K2MnO4
A.300~1500℃ B.250~1200℃ C.400~1300℃ D.250~1500℃