题目

I went out to breakfast this morning to meet a friend. Everything was lovely. But what wasn’t so lovely was the lady who took our order. She spoke in a way that was frustrated, unhappy, certainly not friendly, and sort of rude.When it came to my turn to approach her and order. I thought to myself, “What can I do here to make her day?” Surely there must be something I can sincerely compliment(称赞)her on. Then there it was and I knew instantly. Or more so heard instantly. It was her voice. She had the most unbelievably well-spoken and clear voice. It was so good. That was it. That was w下列化学反应中，属于化合反应的是 [     ]A．2H2+O22H2OB．HCl+NaOH==NaCl+H2OC．Fe2O3+3CO2Fe+3CO2D．2KMnO4K2MnO4+MnO2+O2↑