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AF, focus mode.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.故事讲述一名为亡者家庭提供守灵服务的男子，某天晚上突然收到一个急件，联系人甚至偷偷透露没有人敢接下这个案子，他却不信邪的进入了这栋房子。这是一部全方位呈现复转军人事业,情感生活画卷的作品,引人深思,发人深省,看过之后令人久久不能忘怀.该剧主要讲述了由于18年前一场车祸让酒店富家女楠佩和家徒四壁的九珠这对刚出生的女婴在医院被调包，并在18年后引发了一系列的情感纠葛。此剧于2010年由安徽卫视引进，在安徽卫视首播，后又于纬来戏剧台播出。19葫芦紧闭着嘴巴，面无表情地看着那媳妇进了郑家院子，脚下步伐加快。