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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:However, this so-called Nearing Death Awareness is not a scientific term, but was put forward by Maggie Callanan and Patricia Kelley, two hospice nurses, in their best-selling book "The Last Gift".An anti-smuggling ship posing as a criminal紫茄却又道：你走了，就别再回来送死了。　　艺术之都巴黎。美国画家沃肖在这里过着吉普赛式令人艳羡的自由生活，其实他是一个怨这怨那、时常感叹上天对自己不公的烦人的家伙。故事开始于他和法国妻子的一次争吵，他觉得自己的生活已经被命运之神抛在了一团混乱之中，生活逼得他几乎走上了发疯的边缘，他要和妻子坦白自己的过去，虽然自从相识以来，他一直在对她说谎，但这一次，他要告诉她实情……兄弟二人双臂缠在一起，交换了坚定的眼神。Mobile Phone