精品人二线三线区别

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该系列是一个现代和当代的解释，灵感来自克里斯蒂安F。并跟随六位年轻人，他们为自己的幸福梦想而不懈奋斗。他们不是受害者，而是年轻、勇敢、坚强的人，他们的故事绝对感人、激荡。Am I serious about reporting upstairs, grade 18, 1000000 gold coins第一季中，濒临倒闭的酒楼老板娘马丽奥与婚恋网站的老板高天一拍即合准备将酒楼转型为以相亲为主的“饮食男女”特色主题餐厅，成为婚恋网站线下相亲、约会的指定活动场所，当然酒楼还要继续改进特色菜，吸引爱好美食的食客。这时，老板娘那身上满是小毛病的前夫马洋突然要求回来并复婚，老板娘一时心软答应他留下，但复婚万万不行。经双方秘密协议，马洋不得暴露与老板娘的关系，不得干涉酒楼经营，只能以厨师身份暂时收留，但其间马丽奥与高天情投意合，马洋也同时想着各式各样的办法挽回马丽奥的心。飞机在空中遭遇强烈的雷阵雨，剧烈的颠簸将行李舱内的尸体释放出来，并迅速化身为毫无人性、嗜血如命的恐怖僵尸。才从暴风雨的侵袭中舒缓过来的乘客们怎么也没想到，机舱很快将变成充满杀戮的血腥地狱……但数量实在太多，怎么杀都杀不完，外加狼兵时不时跳出来啃一口，他们对苏杭没了祈盼，思乡之情渐浓，九州虽然鸟不生蛋，可老婆孩子毕竟在那里。