题目

下列关于铜电极的叙述正确的是( )A．铜锌原电池中铜是负极B．用电解法精炼粗铜时，粗铜作阴极C．在镀件上电镀铜时可用金属铜做阳极D．电解稀硫酸制H2和O2时铜做阳极  答案：C解析: 补全对话 A: Hello! Betty, (1) ? B: Hi, Nany, I went to Los Angeles. A: (2) ? B: About three weeks. A: (3) ? B: A lot of interesting things, also the beautiful scenery. A: (4) ? B: That’s right. We enjoyed ourselves very much. a．How long did you spend there b．What did you see there c．Where did you spend your holiday d．So you have a good time