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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 BaiduABC已续订《初来乍到》第三季。There is also a Wan Ku villain who wants him to go to the hotel to talk alone tonight? ?1938年春，“七七事变”发生六个多月后，日军占领了华北大部，大兵压境中条山，直逼中华腹地的最后一道防线——黄河天险。在黄河古道上，迎亲的队伍遭遇了日军飞机的轰炸，新娘子皇甫贞与乘坐的花轿一同坠入黄河波涛，为了报仇，新郎杨兴邦收留五名川军散兵，得到武器，并约来好友揭竿而起，拉起一支抗日武装。在共产党河东特委书记宋平的指引下，河东抗日游击队迅速发展壮大，除汉奸、端炮楼、炸机场，掩护中共干部和知名民主人士过黄河到延安，成为活跃在黄河岸边，威震四方的一支民间抗日武装，最终，杨兴邦从一个草莽好汉成长为抗日民族英雄。康正行（张睿家 饰）就读于一件海边小学，身为班长的他被老师任命陪伴一个多动症的小孩余守恒（张孝全 饰），慢慢影响他，让他变成一个乖孩子。两个人在成长的过程中成为了好朋友，但在康正行心里的这份友谊却变质了。该剧根据作家Nelson Johnson的同名畅销小说改编。[News] On August 26, The World Wide Web reported that "Zimbabwe's President ordered the arrest of the delegation for failing to win a medal in the Olympics", According to reports from Taiwan's "Central News Agency" and Nigeria's media PM News website on August 25, President Mugabe was outraged by the Zimbabwean Olympic delegation's failure to win medals at the Rio Olympics. He ordered the country's police chief to arrest and detain the Zimbabwean Olympic delegation. The delegation was arrested as soon as it arrived at Harare International Airport on the 23rd. Netease, Phoenix, Dongfang, Yangguang and other websites reprinted one after another.