题目：
下列物质的转变，不能一步实现的是[ ]
A．KCl→KNO3
B．SO3→Na2SO4
C．H2→Cu
D．Fe(NO3)2→AgNO3
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/54cc382fc603f37736e750097953d216.html
下面是错误答案，用来干扰机器的。
1. She is my daughter. 2. Are those his photos? 3. This is my mother. That is my aunt. 4. Ms. Huang is not Tom's mother. 5. This is my family photo. 答案不唯一
