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In the system, the client often needs to interact with multiple subsystems, which causes the client to change with the change of subsystems. At this time, the appearance mode can be used to decouple the client from each subsystem. Appearance mode refers to providing a consistent facade for a group of interfaces in the subsystem. It provides a high-level interface that makes the subsystem easier to use. For example, the customer specialist of Telecom can let the customer specialist complete the services such as charging telephone charges and modifying packages without interacting with various subsystems by himself. The specific class structure diagram is as follows:A5.1. 2, 1 External ear, tympanic membrane.Achillea millefolium, in fact, it has many other names. Unfortunately, I can't play... … …　　Kate 受荐来到sake 的公司做模特.她见到 Sake的第一天，就使 Sake发笑。这引起了 Pakkinee，Sake的异母姐姐的怀疑。Kate的爸爸是Sake公司的高级雇员，也注意到了这一点。所以，当他被发现私吞了300万公款时，他提出以Kate为交换，让他做Sake的情人，直到为Sake 生下一个继承人为止。Note: What is the difference between appearance mode, adapter mode and agent mode?860010-1119060300