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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.很快，陈启就买来了四张票，不过并不是连在一起的。4.6. Start the Sentinel process and start monitoring the Master master server:Club Friday The Series 10 不忠的爱之秘密 殇爱讲述女主不顾上一辈的仇恨，执意靠近男主的甜蜜而心酸的爱恋故事。The rules in the prerouting chain are stored in three tables, and the priority of rule execution in these three tables is as follows:该剧改编自同名人气网漫，是一部令人心动的奇幻爱情剧。讲述对自己不幸的命运逆来顺的人类男子，和为了解开魔咒的女神，投身未知的世界从而展开的跨越残酷命运的故事。