题目

— I don’t think students should use mobile phones at school.     —______. They really have a bad influence on our study.     A. I agree with you     B. Not at all        C. No problem                 D. It’s my pleasure 答案：A2．家用电风扇应接入电压为220V家庭电路使用．家庭电路中，电冰箱与电视机是并联（选填“串联”或“并联”）的，家中电灯工作时将电能转化为光能．