已知C(s)+1/2O2(g) ═ CO(g) △H1 =-110.35 kJ�6�1mol-1CO(g)+1/2O2(g) ═ CO2(g) △H2 =-282.57 kJ�6�1mol-1A.392.92 kJ B.2489.42 kJC.784.92 kJ D.3274.30kJ写出具体做法,谢谢!