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当陈华与吴敏的婚外情无意中被赵悦琪发现，陈华抱着愧疚之心想要挽回之时，陈华的哥们周良告诉他，赵悦琪也曾有一段不为人知的初恋情，两人的感情最终又将何去何从……永平帝就和颜悦色地问道：郑爱卿，你有话说？按封赠制，郑长河也是要被诰封为武散官的，故而皇上这么叫他。Operating systems all have software firewalls, and Linux servers generally use iptables. For example, to intercept a request for an IP address, you can execute the following command.二十一世纪初，亚洲年轻富商何凡接受访问，讲述自己白手起家的艰苦发家史，从而引出了何凡父母客死异乡的悲惨身世；二十世纪70年代末，香港商人何俊携妻张丽及一对十岁的孪生兄弟奔赴新加坡创业。新加坡富商钟基之女钟睛垂涎于何俊的俊朗外貌却遭到拒绝，于是使用恶毒手段将何俊夫妇迫害致死。何氏兄弟被送回中国内地，他们立志要出人头地，为父母报仇雪恨。90年代初，随着改革浪潮的蓬勃涌动，兄弟俩决定抓住机遇有所作为，早日与仇家一决高低。就在何氏兄弟奋发图强之时，几个性格迥异的女人闯进了他们的生活，引发了一段段情感纠葛。[Traffic]一本《少年许仙的奇幻漂流》，靠著一个无法解释的奇幻咒语，将一位自命风流花心的男子黄玉荣，带入一段世人皆知的民间故事白蛇传里……Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows: