已知①2CuO+C
2Cu+CO2↑；②2Mg+CO2
2MgO+C，由此得出下列结论正确的是( )
| A．还原性：Mg＞C＞Cu | B．还原性：Mg＞Cu＞C |
| C．氧化性：CuO＞CO2＞MgO | D．氧化性：CuO＞MgO＞CO2 |
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