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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 BaiduFinally, the correct result is output: 3.方信哲（吴启华）本于投资公司工作，少年得志，甚得公司器重。不料，一次投资失当，顿遭投闲置散。哲决自立门户，干一番事业，为筹备资金，哲把其父于大澳的地皮出售，更与好友昌（阮兆祥）亲往大澳视察环境，因而认识了乡委会主席根（元华）及其三个女儿开心（陈松伶）、欢喜（陈妙瑛）及快乐（林芷筠）。原来根祖传的虾膏厂正占用了哲父的地皮，但哲却苦无证据证明地皮乃其父所有，只好隐藏身份暂居大澳，静待唯一知道真相的。四月，竹林里的青笋猛拔节。Speed up and increase connections: Through a large number of repeated deliberate exercises, experts are much faster than beginners in the coding and extraction process, increasing various channels between long-term memory and working memory.Fortunately, when the exception occurs, we have already prepared an exception detection system for the Google Cloud instance. As expected, as can be seen from the above figure directly obtained from the dashboard of our anomaly detection system, when the instances started mining, their time behavior changed greatly, because the associated resource usage was fundamentally different from the traditional resource usage shown by the uncompromised cloud instance. We can use this shift detection to contain this new attack medium and ensure that the cloud platforms and GCE clients involved remain stable.Then I called the health workers to rescue Zhou Xiaolin, While looking at that thing, After careful identification, Only then did I find that the mouth of this thing is not the kind that ordinary animals open and close up and down. But like a 4-petal 'flower', it has 4 lips, which are arranged centripetally in a way of 2 above and 2 below respectively. When it opens, it also looks like a blooming flower. Its structure is a bit like 'X' in English letters. Moreover, the 4 lips are all densely packed with small fangs, which make people's scalp pins and needles. "Zhao Mingkai said.