如图甲池和乙池中的四个电极都是铂电极，乙池溶液分层，上层溶液为某盐溶液，呈中性。请根据下图所示，判断下列有关说法正确的是
| A．甲池是电解池，乙池是原电池；A电极反应式为：C2H5OH＋3H2O -12e－===2CO2＋12H+ |
| B．反应一段时间后，两池溶液的pH均未变化 |
| C．假如乙池中加入K2SO4溶液，隔膜只允许K+通过，当电路中转移0.01mol e－时，则隔膜左侧溶液中最终减少离子约0.02mol |
| D．假如乙池中加入NaI溶液，则在乙池反应过程中，可以观察到C电极周围的溶液呈现棕黄色，反应完毕后，用玻璃棒搅拌溶液，则下层溶液呈现紫红色，上层接近无色 |
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