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The combination mode is also called part-to-whole mode. The combination mode combines objects into a tree structure, which is used to represent the relationship between the whole and the part. The combination mode enables clients to treat individual objects and combined objects equally. For example, in. NET, simple controls such as WinForm controls, TextBox and Label inherit from the Control class, while composite controls such as GroupBox also inherit from the Control class. The specific structure diagram of the combination mode is shown below.(three) other provisions of the medical security management.如此，辗转颠沛几年后，商丘随着外祖父和外祖母来到京城附近。　　与此同时，西海市首富之子张子灏（李乃文 饰）刚刚投资的“君子岚”大酒店也正举行着盛大的开业仪式，宴会之上，有二十余人竟然食物中毒，媒体随即报道出“君子岚”大酒店所有蔬菜供应都是由后石沟村直接提供的，一时间舆论四起。一个涉世未深的年轻海军士兵，因偷窃被叛处重刑。二个面露凶恶但内心善良的士官，受命押解。在漫长的押送路程中，他们不忍再让那孩子受死板军规的折磨，于是，三个人到处胡天胡地，狂欢纵欲，姿情放荡，结果小水兵竟起意开溜这是一部独特的家庭故事剧，以嘻哈乐（Hip-Hop）世界为背景。主人公Lucious Lyon（Terrence Howard）是一个迷人的、精明能干的乐坛超级明星，正准备带领自己的帝国娱乐公司上市。他从小在街头长大，养成了争强好胜的性格。为了保护自己的音乐帝国，他永远不会放弃任何一场战斗。但是现在和他争夺王位的是他前妻和三个儿子，他不可能再像以前那样不择手段。For example, I now need to create a div element on the page. Then we definitely need a function to create the div, Now all I need is this function, which is only responsible for creating div elements. It doesn't want to take care of the rest, That is, to realize the principle of single responsibility, Just like Kissy on Taobao, At the beginning, they defined Kissy to do only one thing and did it well. The specific instantiation class in the monomer mode was handled by the agent function. The advantage of doing so was that the specific business logic was separated. The agent only cared about the business logic of the agent. Here, the function of the agent was to instantiate the object and instantiate it only once. Create div code just create div, the others don't care; The following code: