A:滤渣是Ag、Cu、Zn
B:滤液中含有Zn2+、Mg2+、NO3﹣
C:滤渣是Ag、Cu、Mg
D:金属活动性顺序是Ag<Cu<Zn<Mg
Mike didn't get wet because his teacher _______ him an umbrella.
在第53届苏州世乒赛女单决赛中,中国选手丁宁在0:2落后且右脚扭伤的情况下,“希望能战斗到最后”的强烈信念使她越战越勇,最终斩获冠军。丁宁的事迹告诉我们( )