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你说吧，我这心里一直不得劲，在南边咱们是兄弟，来到京城就成仇人了。First do inter-provincial transfer. From the first semester to the second semester to the second semester. It is not possible to finish the senior high school entrance examination.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这样便有了和尹旭对抗的实力，报仇也就有了希望。Attacks similar to those before the 2016 election may indicate the future trend: we are about to move towards the era of digital war, which is more harmful and hidden than traditional wars, and will not be as extreme as Pearl Harbor or 9/11.In the last article, we have learned how to use the iptables command to view rules, so in this article we will summarize how to manage rules.Owing to the seriousness of the case, Investigators expanded the scope of their search. Through continuous investigation of the surroundings, investigators accidentally found three brightly colored plastic bags in Wenliang River on the west side of the scene. The bags were basically filled with domestic garbage. Under these scattered items, they found a bank card of a rural credit cooperative. The last bag contained clothes, both men's and women's. In a pair of men's jeans, the investigators found another Agricultural Bank subsistence allowance card with a signature on the back. After identification, the clothes in the bag were exactly the clothes the couple had worn in recent days. What was even more shocking was that the bag also contained the marriage certificates of the couple. This is a dangerous signal, and the investigators' foreboding is getting stronger and stronger. The top priority is to find out where the missing couple are.