铅蓄电池是典型的可充电电池，它的正负极隔板是惰性材料，电池总反应式为：Pb＋PbO2＋4H+＋2SO42-
2PbSO4＋2H2O（如图），则下列说法正确的是
| A．放电时负极反应是：Pb-2e-＝Pb2+,充电是阴极反应是：PbSO4+2H2O-2e-＝PbO2+4H++SO42- |
| B．闭合K断开K1，电流的流动方向是从B到A |
| C．放电过程中，溶液的pH不断减小 |
| D．放电时，线路上若有1mole-通过，则消耗硫酸也是1mol |
相关试题
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
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