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The difference between them is that each policy class in the policy mode is equal and parallel, and there is no connection between them. Therefore, customers must be familiar with the functions of these policy classes so that customers can actively switch algorithms at any time. However, in the state mode, the behavior corresponding to the state and the state has long been encapsulated, and the switching between states has long been stipulated to be completed. The "change of behavior" occurs within the state mode. For customers, they do not need to know these details. This is what state patterns do天宇集团老总金泰临的儿子金贤从美国回来，一下飞机就在国际刑警杨帆的眼皮底下被刘云钊指使的匪徒劫持，而杨帆正是金泰临的前妻。同时高分子专家冯云翔到公安局报案却又离奇死去，杨帆转而被安排调查他的案子。作为杨帆徒弟的叶勤接手调查绑架案，暗中安排老孙收集局里几个领导的材料……11First of all, there is a select selection box on the page, then there is an input box for the input purchase quantity, and there are also two display areas, namely, the display area for the selected color and the input quantity, and the next button operation.电影根据新冠肺炎疫情防控斗争的真实事件改编，以武汉市金银潭医院为核心故事背景，同时兼顾武汉同济医院、武汉市肺科医院、武汉协和医院、武汉大学人民医院（湖北省人民医院）、火神山医院、方舱医院等兄弟单位，以武汉医护人员、全国各省市援鄂医疗队为人物原型，全景式记录波澜壮阔、艰苦卓绝的抗疫斗争。便告诉大伯父说，行囊已经准备好，他明日一早便要启程去往西北。