题目

—You are confident about the job interview , aren’t you? —_____.I’m well prepared and feel I’ve got everything they need. A. sure, I am          B. It’s hard to say C.I hope so           D. Well, maybe 答案：A考查交际用语。由I’m well prepared and feel I’ve got everything they need.可知准备很好，当然自信。肯定答复，选A符合。 25℃、1.01×105 Pa时，反应：2N2O5(g)＝4NO2(g)＋O2(g)；ΔH＝＋56.76 kJ/mol，自发进行的原因是 [　　] A． 是吸热反应 B． 是放热反应 C． 是熵减少的反应 D． 熵增效应大于能量效应