据报道，最近摩托罗拉公司研发了一种由甲醇和氧气以及强碱做电解质溶液的新型手机电池，电量可达现在使用的镍氢电池或锂电池的十倍，可连续使用一个月才充一次电。其电池反应为： 2CH3OH + 3O2 + 4OH- 
2CO32- + 6H2O，则下列说法正确的是
| A．构成该电 池的正极和负极必须是两种活性不同的金属 |
| B．充电时有CH3OH生成的电极为阳极 |
| C．放电时电解质溶液的pH逐渐增大 |
| D．放电时负极的电极反应为：CH3OH－6e-＋8OH-＝ CO32- + 6H2O |
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