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Chu can also see clearly that the reason is that there are too many of them. Let's describe them this way-it looks like a dark cloud rising out of thin air in the rainforest. "Zhang Xiaobo said.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.板栗悻悻地说道：就这样小心？好像谁跟你抢似的。In addition, if you are familiar with JavaScript, you can write your own script to border photos, which is quite convenient.Added reserved words (such as protected, static, and interface)