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素谨也急忙盈盈拜倒。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 BaiduIn the defense measures against DDOS attacks, deployment strategy is also a part that needs to be seriously considered. At present, the more reasonable deployment strategy is: the detection equipment is deployed close to the business host, the source is cleaned, and the bypass deployment is carried out. Attacks are distributed, and defense also needs to consider distributed deployment strategies.围墙阻挡不了飞鸟，也阻挡不了为保护鸟类而战斗的人们。 科学与自然纪录片. 美国和墨西哥边界两侧的观鸟人分享他们对保护一些全球最美鸟类 ...描述在化妆品公司宣传部工作的主角红河梅秘密享受美食的故事。因为年轻就被提拔为宣传部leader的梅，因为谁都羡慕的美貌和身材，周围的人都说她在饮食上很用心，但她在下班后却期待着一个人在饮食连锁店喝酒，有着意外的样貌。反映江湖义士刺杀暴君雍正的一段可歌可泣的悲壮故事。清雍正年间，大兴文字狱，许多文人无辜被杀。雍正为铲除异己，训练暗杀集团“血滴子”，大肆屠杀民间义士，以前“血滴子”成员马腾和大侠白泰官、吕四娘为首的反清组织，不惜牺牲生命，混入宫中，与众多高手做殊死搏斗。「国生宙！生在国家，拥有宇宙般宽广胸怀的男人！难道不是为了成为自卫官而生的家伙吗！」被男人认定的宙最初是拒绝的，不过，「没有工作，租不到公寓，就这样无法生活，如果训练生也给工资，那就先同意吧」带着半吊子的决心的结果就是成为陆上自卫队的候补人员。