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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.杨长帆擦了把冷汗。历史学家露西·沃斯利带我们走进三处藏有宝藏的皇家宫殿，揭开每一座建筑是如何塑造一个君主政体和一个国家的。通过独家访问白金汉宫最秘密的地方，她揭露了戏剧性的事件，改变了英国历史的进程，从伦敦塔的威吓和汉普顿宫的绝对君主制的兴衰，到现代皇室在肯辛顿宫的面孔。这是一部母女间的感人故事，读来令人震撼不已。尤其是剧中所传达出来的“母慈女孝”的深刻主题，更是与当今“共建和谐社会”的时代背景不谋而合。该剧讲述了一位即使处在困苦环境中，但仍抱着希望面对未来的花美男少年家长安太平（车学渊饰）失去双亲但仍不受打击，负起照顾奶奶及弟妹的责任，努力不懈赚取生活费同时也兼顾学习的故事。我朝太祖年间，你们南雀国被西面的蕃国攻击，眼看就要灭国，是我大靖出兵，才保住了南雀国根基。