25℃、101 kPa下，碳、氢气、甲烷和葡萄糖的燃烧热依次是393.5 kJ/mol、285.8 kJ/mol、890.3 kJ/mol、2800 kJ/mol，则下列热化学方程式正确的是（  ）

A．C(s)+1/2O2(g)==CO(g)△H ＝－393.5 kJ/mol

B．2H2(g)+O2(g)==2H2O(1)△H ＝ + 571.6 kJ/mol

C．CH4(g) + 2O2(g)="=" CO2(g) + 2H2O(g)△H ＝－890.3 kJ/mol

D．1/2C6H12O6(s) + 3O2(g) ="==" 3CO2(g) + 3H2O(1)△H ＝－1400 kJ/mol