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Imagine a scene where there is an electric lamp with only one switch on it. When the light is on, press the switch at this time and the light will switch to the off state. Press the switch again and the light will be turned on again. The behavior of the same switch button is different in different states.李新亮一脸自豪地说道。老天要使人灭亡，必先使人疯狂。作为邻居，陈文羽经常帮着许阿姨做一些粗活，他们两家关系挺好的。We can understand that the responsibility chain mode is a chain composed of processing requests. Requests are passed between these objects in turn until we encounter an object that can process it. We call these objects nodes in the chain. For example, object a sends a request to object b. If object b does not process, it will give the request to c. If object c does not process, it will give the request to d, and so on, until one object can process the request. Of course, if no object processes the request, then the request will leave the chain.东贤将饰演温柔亲切的便利店店长，秀彬将饰演外冷内热的兼职生，宰铉将饰演可爱的“狗狗美年下男”，禹硕将饰演充满颓废美的薄巧团客人。新人演员崔智秀将担任女主人公，通过特有的可爱和活泼的魅力给角色注入活力，提高投入度。