题目

用一个开关能同时控制电路中的两盏灯,则这两盏灯:A.一定是串联                     B.一定是并联                                       C.可 能是串联,也可能是并联       D.以上说法都 对                                                                                                                                                                                                                                                                                                                                                                                                                                          答案:AC
物理 试题推荐
最近更新