题型:问答题 简答题 —What wonderful music!—Thanks. Neither my classmates nor my mother ______ the piano better than me. A.isB.playsC.playD.are 查看答案
题型:问答题 简答题 有氧化铜和三氧化二铁的混合物ag,加入2mol/L的HCl溶液50mL,恰好完全溶解,若用H2将ag该混合物还原,得到金属的质量为 ( )A.(a-0.8)gB.(a-1.6)gC.1.6agD.0.8ag 查看答案