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1. Decoupling the complex relationship between the request sender and N receivers, you don't need to know which node in the chain can process your request, so youState mode and policy mode are like twins. They both encapsulate a series of algorithms or behaviors. Their class diagrams look almost identical, but their intentions are very different, so they are two very different modes. The policy pattern and the state pattern have in common that they both have a context, policies or state classes to which the context delegates the request to execute从前本地的总督、主教就是他们见过最奢侈的人，一顿大餐也不过一两个厨子几菜几汤，杨府这一晚却是大大小小菜色十余道，不谈厨子的来路成本，单是用到的食材配料，怕是就要百余两。) J $M/[* c. R; On the morning of J4 Z7, President Moon Jae in and his wife Jin Zhengshu watched the movie 1987/United News in Seoul's Longshan CGV.Disadvantages: It makes it difficult to add new data structures.　　时杜结识二女鬼，紫云，紫花，对紫花尤其迷恋，二人展开旖旎烂漫的爱情，惜此事被花之主人三魔查悉，遂向花四家压力，花终于在无可选择的情况下，自我了断以结束此段哀怨的感情，此事更间接令钟与三摩展开连番恶斗。　　一场火灾发生，所有人都会设法逃离火场；一班勇士，他们忘我地千方百计进入火海。为的不是探险、也不是挑战人体极限，而是舍身相救被困于水深火热的市民。这班勇士就是「消防员」。然而消防员并非孤军作战，与他们并肩拼搏的，是一班临危不乱的救护员。他们为痛得呼天抢地的伤者进行急救、为吓至惊魂未定的市民伸出救援之手。勇气不是上天赋予，处变不惊的能力也不是一朝一夕而来的。