题目

阅读理解     阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。 I have some penfriends.  They come from different countries.  Here is some information about them. I like science very much.  So one of them is my best friend because we have the same hobby. Nick from England: When I grow up，I would like to become a teacher.  I love little children! I want to get lots of money and live somewhere sunny and in a big house with my wife and children. Graziano from Thailand: When I grow up，I would like to become a scientist.  I will work in the  设阿伏伽德罗常数为NA，下列说法正确的是 A．pH = 1 的H2SO4溶液中所含H+的个数为0.1NA B．100mL  0.1mol·L-1的NH4Cl溶液所含NH4+的个数为0.01 NA C．电解精炼铜的过程中，外电路转移NA个电子，阴极生成铜的质量为32g  D．将2molSO2和10molO2充入一密闭容器中完全反应后，生成SO3的分子数为2NA