题目

在FeCl3和CuCl2的混合溶液中加入过量的铁粉，若充分反应后溶液的质量没有变化，则原混合溶液中Fe3＋和Cu2＋的物质的量浓度之比为( ) A．2∶7 B．1∶7  C．7∶1 D．5∶14 答案：AThat truck nearly hit me; I ______. A. might be killed                                        B. may been killed C. may be killed                                        D. might have been killed