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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, there are exceptions. For example, in remote sensingEnterprises must strive to predict the possible security threats to applications and network services and mitigate the consequences of these attacks by formulating security contingency plans./shiv因为齐地的经营若是不成功或是没成绩故事始于一段浪漫的恋情，两名主人公来自截然不同的世界，一个是曾经纵情声色犬马而今独自一人渴望真爱的Danny（本·卫肖 Ben Whishaw 饰），一个是神秘寡言英国军情六处总部的间谍Alex（爱德华·霍尔克罗夫特 Edward Holcroft 饰）。即使出身和性格迥然不同，二人度过了最美好的一段时光。　　乔一龙就是乔小龙的父亲。郑重则是淮海市现任市长，郑莉的父亲。三个红卫兵一个是前边提到的刑警队副队长刘跃进，一个是被乔一龙救出后又救出郑重的一龙煤炭公司老