部分氧化的Fe-Cu合金样品（氧化物为Fe2O3、CuO）共5.76g，经如下处理:
下列说法正确的是（ ）
| A．滤液A中的阳离子为Fe2+、Fe3+、H+ | B．样品中CuO的质量为4.0 g |
| C．样品中Fe元素的质量为2.24 g | D．V=896 |
相关试题
They use computers to keep the traffic _______ smoothly.
| A．being run | B．run | C．to run | D．running |
If you leave the club, you will not be_____back in .
| A．received | B．admitted | C．turned | D．moved |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
粤公网安备 44130202000953号