题目

— How about Thursday morning? Say, 10 o’clock?     — OK.        I’ll be expecting you then.     A. Is that right?       B. That’s settled.     C. How are you doing?   D. No way! 答案：B 解析: 略在标准状下，22g CO2气体的质量是       L 与         g N2含有相同的分子数。