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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 BaiduStay with your horse and try it back.[Memory 2G-3G Memory Precautions] In order to ensure that summoners who use 2G-3G models have a better experience of this mode, please turn off other software that occupies memory and network as much as possible during the experience.不然的话，她要是出了啥事，带累了你，你岂不是亏得很？听了这话，喜姑姑想起刚才那个春花直往板栗身边凑的情形，心里一激灵，越发不安了。The core of JIT production is to eliminate all waste, and its realization way is to realize the goal of "zero inventory". The essence of JIT production mode is that it is an ideological system of continuous improvement. Its focus is to put an end to all waste. It responds to customers as quickly as possible with the lowest possible cost and the highest possible quality, thus improving the competitiveness of enterprises. The implementation process of JIT is to continuously improve the production process endlessly. By increasing the efficiency of resource utilization, eliminating various wastes, reducing the cost of enterprises, and providing high-quality services to meet the market demand, the purpose of increasing profits and enhancing core competitiveness of enterprises is achieved.The above are all the selling prices on weekdays, i.e. Weekdays (Monday to Friday), while the name of the one-day ticket purchased on Saturdays, Sundays, 8th of each month or Japanese holidays is "", 600 yen for adults and 300 yen for children. The price is affordable. You can take the subway and bus in Nagoya City at will on the same day. You must pay attention when purchasing! ~我们自然劝了田大哥。