19. 鉛蓄電池之正負極分別為何種材料? (A)正極板:過氧化鉛 (PbO2),負極板:鉛 (Pb) (B)正極板:鉛 (Pb),負極板:過氧化鉛 (PbO2) (C)正極板:鉛 (Pb),負極板:碳酸鈣 (CaCO3) (D)正極板:過氧化鉛 (PbO2),負極板:硫酸鈣(CaSO4)