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也只有板栗哥哥才会熟悉张家的亲戚朋友，就算我们，都没那么清楚的。Since Pizza is still an abstract class, when we create a subclass of FactoryPizzaStore, we should also implement a specific subclass inherited from Pizza. If we only create a subclass of FactoryPizzaStore without a corresponding subclass of Pizza, what does our pizza shop sell?/v inc-monster approaching. This command is used to warn the team that monsters are approaching.B) It is suggested to start from a simple scene and discover or design a certain pattern by yourself. From this, you can understand how the model solves the problem. In this way, the model becomes your own thing, and you will not have the problem that it is easier said than done. All design patterns are just the application of basic principles and concepts in specific occasions. You may not know the name of a design pattern, but you know all its advantages, disadvantages, variants and applications. Seeing mountains is not mountains, seeing water is not water.秦枫忙推了她一下，咳嗽一声道：林队长他们长途奔波而来，刚才又大悲大恸，力倦神疲之下，精神难免有些不济，回头歇息一阵就好了。杨长帆抬臂承诺道，此番下南洋杀杀弗朗机锐气，稳定航路后，诸位自可自由航行贩货。