A:C(s)+O2(g)=CO(g)△H=' ―393.5' kJ/mol
B:2H2(g)+O2(g)=2H2O(l)△H=' +571.6' kJ/mol
C:CH4(g)+2O2(g)=CO2(g)+2H2O(g)△H=' ―890.3' kJ/mol
D:C6H12O6(s) +6O2(g)=6CO2(g)+6H2O(l)△H=' ―2800' kJ/mol
下列说法正确的是( )。