制印刷电路时，常用FeCl3溶液作为“腐蚀液”发生的化学反应为：2FeCl3+Cu→2FeCl2+CuCl2，向盛有FeCl3和CuCl2混合溶液的烧杯中同时加入铁粉和铜粉，反应结束后，下列结果不可能出现的是（ ）
A．烧杯中有铜粉无铁粉
B．烧杯中有铜粉、Fe3+、Fe2+，无铁粉
C．烧杯中铁粉铜粉都无
D．烧杯中有Fe3+、Fe2+、Cu2+离子
答案：B
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