One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.
Telecommunications
Three, non normal major graduates to apply for teacher qualifications should participate in the teacher qualification accreditation agencies to organize the lecture.
高易谦虚道：这都是大王威名所致，让他们敬畏臣服，臣不敢居功。
那咱家少爷就是玄武王的弟弟，谁敢不还赌债，他还想不想开赌场了？陈老管家道：可这到底是赌，官府要是插手呢？他心跳放缓后，脑子也好使起来，考虑问题就周详了。
"You cannot cheat in front of death." Ally thought. Although it was a game, at that moment, she was completely involved in the play.
战国的时候，亲过曾经从渭水尚有迁都到中下游的咸/阳。
说什么都显虚伪，都可笑。
刘井儿笑道：这有什么难的。
Which classes and methods to cut in (where)
二战爆发的时候，比尔九岁。他和他的父母，姐姐和妹妹住在伦敦郊区的一栋房子里。父亲很快应征入伍，临走前他教会了儿子板球里“欺骗”对手的曲线球。频繁的空袭使得生活慌乱不安，而孩子们却对这些景象感到兴奋。人们也逐渐适应了这样。
杜殇随即吩咐道：立即出击，相救那五百人。
大会上尹旭的位置明显提高了许多，作为此番彭城作战功劳第一人，受到各路诸侯的恭贺。
Originated in Egypt more than 3,000 years ago, it spread successively in Mediterranean coastal countries. The 23rd BC ancient Greek Olympics was listed as a competitive event.
Xinhua News Agency to External Qu Ting
When you change the shutter speed, you also change the way moving objects are recorded on the negative.
伍兵为了案情与贺雪薇一起去找晓琳晓琳因为抗拒父亲强暴失手杀了而逃到湛海市并贩毒头目司徒杰手下做过事所以决定远离湛海萧文却误认为伍兵和贺雪薇太残酷无情把晓琳赶走
