简答题将反应H+ + OH- === H2O设计成可逆电池,下列电池正确的是( ) A、PtǀH2(g)ǀH+(aq)ǀǀOH-(aq)ǀO2(g)ǀPt B、PtǀH2(g)ǀNaOH(aq)ǀO2(g)ǀPt C、PtǀH2(g)ǀNaOH(aq)ǀǀHCl(aq)ǀH2(g)ǀPt D、PtǀH2(p1)ǀH2O(l)ǀO2(g)ǀPt