在下列电池中液接电势不能被忽略的是: A. Pt , H 2 ( p 1 )│HCl ( a )│H 2 ( p 2 ) , Pt B. Pt , H 2 ( p 1 )│HCl ( a 1 )║HCl ( a 2 )│H 2 ( p 2 ) , Pt C. Pt , H 2 ( p 1 )│HCl ( a 1 )│HCl ( a 2 )│H 2 ( p 2 ) , Pt D. Pt , H 2 ( p 1 )│HCl ( a 1 )│AgCl (s) , Ag−Ag , AgCl (s)│HCl ( a 2 )│H 2 ( p 2 ) , Pt