1. (2023七下·浙江期末) 如图，下列条件中能判断AD∥BC 的是（    ）

①∠1＝∠2                                                           ②∠3＝∠4

③∠2＋∠5＝∠6                                          ④∠DAB＋∠2＋∠3＝180°