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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:而且大部分壮丁被抽调，势必会导致土地荒芜，经济方面将会受到严重的打击。2. IsPay (has it been successfully recharged): If the value is true, it means that it has been successfully recharged, otherwise it means that it has not been successfully recharged; Just buy it as an ordinary user.戚夫人，这话不对。I have a friend who used to be a stay-at-home mother. She couldn't stand a quarrelling marriage all day long and chose to divorce.1470年。随着时间的推移，梅迪奇的家族权力得到巩固。洛伦佐被要求接替他父亲的位置，因为他对自己生活的一次尝试暴露了他们多年来糟糕的银行管理。作为梅迪奇家族的新首领，他必须照顾他的弟弟朱利亚诺和妹妹比安卡。他娶了克拉丽丝·奥西尼，一位来自罗马的贵妇人，他与波提切利的友谊赋予了文艺复兴的活力。他与教皇西克斯图斯（Pope Sixtus）的反差，使佛罗伦萨迎来了历史上最血腥的时刻，帕齐阴谋。