题目

下列有关热化学方程式的叙述正确的是( ) A.已知甲烷的燃烧热为890.3kJ/mol,则甲烷燃烧的热化学方程式可表示为CH4(g)+2O2(g)═2CO2(g)+2H2O(g)△H=﹣890.3 kJ/mol B.已知C(石墨,s)═C(金刚石,s)△H>0,则金刚石比石墨稳定 C.已知中和热为△H=﹣57.3 kJ/mol,则1mol稀硫酸和足量稀NaOH溶液反应的反应热就是中和热 D.已知S(g)+O2(g)═SO2(g)△H1;S(s)+O2(g)═SO2(g)△H2,则△H1<△H2. The glass doors have taken the place of the wooden ones at the entrance, __________ in the natural light during the day. A. to let  B. letting C. let      D. having let
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