2014 Beijing Question 3 Single-choice Differentiating 2014_北京 Paper 3.(6分)下列电池工作时, ${ \bf O } _ { 2 }$ 在正极放电的是( A. 锌锰电池B. 氢燃料电池C. 铅蓄电池D. Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →