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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.再战的命令送出去，赵文华依旧愤怒难平，在房中左右踱步，寻思着该怎么对付这对新搭档，直至杨长帆来访，送上了四支晶莹剔透的玉壶，他才终于平静了一些。2.2 PCB Typesetting RequirementsFirst, the number of top talents in the industry is relatively limited and there is a shortage of good teachers. Second, the good and bad products are intermingled, but ordinary consumers lack the ability to distinguish, leading to the expulsion of good ones from bad ones. Third, giants enter and crush start-up organizations with large resources...崔达普原名奇夏明，14岁时曾落水，被崔仁荷的爷爷所救并收养，改名为崔达普， 和同岁却不同辈的“侄女”崔仁荷成为一家人。因为内心的真挚和对救命恩人的感激，他抛弃过往的身份和经历，一直以崔达普的身份生活着，头发经常是蓬乱的，考试、衣着等都是一团糟，但是为了省钱供“侄女”崔仁荷读书，崔达普开起了出租车，最后却因为超强的记忆力和天生的聪明头脑当上了记者，而崔仁荷也因患有说谎就会打嗝不止的“匹诺曹症”，难以从事其他职业，最终直面病症，选择做一名报道真实情况的社会部记者……而且韩信本身也有意于西楚国修好，这与霸王交待的任务相同。警察局局长庄静河，带着复杂的欣喜，等回了在英国留学两年的女儿庄晓蝶，也等到了女儿早已在英国私自结婚的消息，女婿正是海关监督宋博年之子，宋沛文。庄家父女俩为此吵翻，晓蝶离家出走，被迎面逃来的毒贩挟为人质。解除人质过程危机中，警察局侦缉大队队长江昱城、贫民窟出身的小混混凌云飞，还有宋家养子宋武平，齐力救下晓蝶。