A:滤液A中的阳离子为Fe2+、Fe3+、H+
B:样品中Fe元素的质量为1.12 g
C:样品中CuO的质量为4.0 g
D:V=448
选答语。
①What's your name? ____ A. I'm from China.
②Where are you from? ____ B. He's my grandpa.
③Who's that man?____ C. My name is Tutu.