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4. When starting a new activity from the current activity.老丁长舒了一口气，擦掉了额头上的汗珠：要么成大事……要么死无葬身之地……杨长帆火速找到了马厩，喊看马的交上便条，看马的这才开厩让杨长帆进去，表情也是十万个为什么。“黑疯婆子”系列电影始于2005年，由美国黑人电影人泰勒·派瑞(Tyler Perry)打造。自《疯女人日记》(Diary of a Mad Black Woman)2005年2月上映以来，该系列于14年间推出《黑疯婆子的万圣节》(Boo! A Madea Halloween)、《黑疯婆子的快乐大家庭》(Madea's Big Happy Family)、《黑疯婆子闹监狱》(Madea Goes to Jail)等9部影片，展开一段又一段“黑疯婆子”疯狂搞笑之旅。 最新亮相的《黑疯婆子的家庭葬礼》，继续由今年50岁的泰勒·派瑞担纲编剧、导演和主演，讲述一场意想不到的葬礼引出家族秘密的滑稽故事。可是当他们到达的时候，才返现已经有人捷足先登。The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu项羽微微一笑，不想再为难小娇妻，胳膊微微一用力，虞姬这才站稳脚步。