题目

A: Excuse me. 【1】B: Yes, I'm a student there. I'm going to school now. You can follow me.A: Thank you. I'm new in your school. My name is Tom, from America.May I have your name?B: Wang Wei. 【2】A: Well, I like doing things by myself. However, I am lucky today. You are so helpful. Thank you!B: 【3】 We are schoolmates now. Could you please help me with my English?A: Certainly. I'm weak in Chinese. You can teach me Chinese.B: Sure! Let's help each other.A: 【4】B: By the way, how do you like Chinese traditional music?A: Very much! Erhu, dizi and pipa sound really wonderful.B: I've got设NA为阿伏加德罗常数的值。如果a g某气体中含有的分子数为b，则c g该气体在标准状况下的体积是 A．L    B． L    C．L    D．L