题目

下列热化学方程式中△H代表燃烧热的是(       ) A、CH4(g)+3/2O2(g)=2H2O(g)+CO(g)         △H1 B、S(s)+3/2O2(g)=SO3(s)                   △H2 C、C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l)      △H3 D、2CO(g)+O2(g)=2CO2(g)                 △H4 答案：CHurry up, _____ we will not catch the early busA. and B. but C. so D. or