User->where('type=1 AND status=1')->select()生成的SQL的语句是? A、SELECT * FROM pingshifen_homeworkStatistics WHERE type=1 AND status=1 B、SELECT * FROM pingshifen_homeworkStatistics WHERE type=1 C、SELECT * FROM pingshifen_homeworkStatistics WHERE status=1 D、SELECT * FROM pingshifen_homeworkStatistics