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You can see that PizzaStore depends on a SImpleFactory, which depends on an abstract pizza. Under normal circumstances, to decouple, control inversion is required. The core idea of control inversion is that neither the upper structure nor the lower structure depends on implementation, but on abstraction.别说你了，我都分不清。被丈夫抛弃后的棉花（颜丙燕 饰）本以为找到了真爱，感情升温之际不料正房归来，经朋友介绍去照顾患有老年痴呆的盛先生（王德顺 饰），当偏见、误会、争吵都归于平静，棉花意外怀孕，引来老头女儿盛琴（艾丽娅 饰）的怀疑。一个受到几经伤害却意外怀孕的保姆，一个患老年痴呆念念不忘前妻的孤独老人，一个被丈夫冷落、被儿子指责、被父亲遗忘的女儿，三人将产生怎样剪不断理还乱的纠葛……Resource isolation can be regarded as a protective shield for user services. This protective system has extremely powerful data and traffic processing capabilities to filter abnormal traffic and requests for users. For example, for Syn Flood, the shield will respond to Syn Cookie or Syn Reset authentication, filter forged source data packets or attacks of power generation through authentication of data sources, and protect the server from malicious connection erosion. The resource isolation system mainly protects the third and fourth layers of ISO model. The schematic diagram of resource isolation is as follows:B. Short track speed skating“5·12”汶川地震忽然来袭，重灾区银杉镇凤凰村与外界的通道被震毁，几成一座孤村。