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Responsibility chain mode-A request needs multiple objects to process, thus avoiding the coupling relationship between the sender and receiver of the request. Connect these objects into a chain and pass the request along this chain until an object processes it. The specific structure diagram is as follows:However, those organizations that established the late on-line and off-duty class mode will position themselves according to the market demand in the new stage in order to achieve differentiated development. For example, Tong Wang Xing is a children's ability and quality training institution for B-end institutions such as early childhood education. In view of the low utilization rate of classrooms in the current early childhood education institutions and the difficulty in consuming classes in the pre-sale class mode, the franchisee has explored the franchise mode of "shared brand store", i.e. The franchisee does not need to change its own brand, but only needs to build 1 to 2 Tongwangxing brand classrooms in its operating area and integrate Tongwangxing's market and operating system into its original brand system.System.out.println ("start computer finished! ");可惜他如今还新安一带，也不知他现在怎么样了，默然之间尹旭心中多了许多的牵挂。田遥含愧鞠躬道：让夫人费心，田遥惭愧。And firewall functionality for packet filtering