MgAgCl电池是一种能被海水激活的一次性贮备电池，电池反应方程式为：
2AgCl＋Mg === Mg2＋＋2Ag ＋2Cl－。有关该电池的说法正确的是( )
| A．可用于海上照明供电 | B．负极反应为AgCl＋e－===Ag＋Cl－ |
| C．Mg为电池的正极 | D．AgCl为阳极，发生了氧化反应 |
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