ch4 +e*>CH3 +H+e (3-1)CH3+e*>(3 - 3) CH + e *本;在C + + H e(3 - 4)甲烷+ e *本;祝辞CH2 + 2 H (H2) + e(3 - 5)甲烷+ e *本;在CH (H2 + H) + e + 3 H(3 - 6)甲烷+ e *本;C