A:两极材料都用石墨,用稀盐酸做电解质溶液
B:通入氢气的电极为原电池的负极
C:电解质溶液中的阴离子向通氯气的电极移动
D:通氯气的电极反应为Cl2+2e—=2Cl—
I met a friend of mine _______ in the street yesterday.