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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故事发生在珠海的一间酒吧，风情万种的酒吧老板娘英姐妖娆迷人，深深被其吸引的驻唱歌手阿兴总渴望引起英姐的注意。循规蹈矩，天真温暖的出租车司机庆哥即是酒吧的常客，也对英姐有着温厚酽醇的依恋，二人却因不同的顾虑，无法敞开对英姐的爱意。尹旭看着漫天的火势，耳听嘈杂混乱的声响，心知不论是何情况，现在无疑是刘邦溜走的最佳时机。少女武则天被唐太宗选为才人，太宗患病，武则天与太子李治产生恋情。太宗驾崩，李治即位，是为高宗。高宗喜女色不好政治，将武则天封为宸妃。武则天具有强烈的政治野心，将侄子武三思等安插在军机部门位居要职。为清除异己，武则天不惜亲手掐死自己女儿以嫁祸王皇后。王皇后被废，武则天被尊为天后，开始展示惊人的政治才能。高宗去世后，武则天废掉儿子中宗，自号“圣神皇帝”，改国号为周，进行了大刀阔斧的政治改革……Then, people will become lazier and lazier, and they will not want to move more and more, even if they used to love sports. And spend more and more time sleeping.原来他从去年就没弄明白规则……——2013年8月11日起，更新时间改为上午十点。讲的是前世今生的鬼故事，男主前世是个皮影戏艺人，今生是大明星，他老屋有只鬼一直缠着他不放，要杀掉和他在一起的所有女人