单项选择题

A.Pt,H2(p1)│HCl(m1)│H2(p2),Pt
B.Pt,H2(p)│HCl(m1)‖HCl(m2)│H2(p),Pt
C.Pt,H2(p)│HCl(m1)┆HCl(m2)│H2(p),Pt
D.Pt,H2(p)│HCl(m1)│AgCl,Ag-Ag,AgCl│HCl(m1) │H2(p),Pt