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
The event statement creates an event. Each event consists of two main parts, the first part is event scheduling
林俊杰北京开唱 实力唱功飙唱西洋神曲 -- 林俊杰
这是一部讲述春秋战国时期历史故事的电视剧。战国晚期，秦赵争锋，双雄对峙，至长平一战，秦统一天下，初成定局。全剧从惊险刺激的和氏璧完璧归赵入手，推出了蔺相如。通过偷袭石城引出白起。其后渑池斗智，相如拜相，廉颇“负荆请罪”。蔺相如使秦不辱使命，为赵国赢得了休养生息之机。最终，秦王嬴政扫平六国，完成先祖秦昭襄王一统天下的夙愿！
他直接问张杨道：张叔不考查侄儿了？是不是侄儿来晚了，被剔除了？张杨听了一愣，旋即笑道：还考查什么？凡清南村的，都是知根知底的，自然无须考查。
16.1 If the low speech whisper hearing of any ear is less than 5m, the air conduction hearing curve of pure tone audiogram will lose 35dB of hearing at any frequency of 500, 1000 and 2000 Hz or 50dB of hearing at 3000Hz, it is not qualified.
龙浩冉虽然遭遇了生活变故，但最终还是理性战胜感性，选择了恨铁不成钢的丈夫。即使前男友豪车相赠也不为所动，坚定的守护着自己的婚姻。浩冉的正确婚姻观感染了观众。该剧情节反映社会现实，也给不少观众带来了启发。剧中，浩冉面对生活中的困境一往无前，为当代奋斗青年的成长带来了满满的正能量。《岳父太囧》追妻过程，一波三折，堪比一部精彩的“游击战”。该剧情节反映社会现实，也给不少观众带来了启发。
Witch's socks, everyone should know, look at the picture, don't swallow
长此以往下去，越国会越发的强大。
Undertake. Yixin Model: Unsecured Guaranteed Model Yixin Company was established in Beijing in 2006 and then launched P2P Platform for Yiren Loan. Different from the auction, when the investor decides to lend the funds in his hand, Yixin selects the borrower for him from among the loan applicants. The interest rate of the borrower is decided by Yixin according to its credit review, and the profit of the enterprise mainly comes from the service fee. Yixin's model is more like a combination of housing agencies and Taobao. Housing agencies collect housing resources, then contact buyers and charge agency fees after the transaction. The specific operation process is as follows: Yixin will break up the lender's money and make a multi-person loan contract to the lender. When the money reaches the third-party account, the contract will come into effect. Although Yixin does not have a contract between the lender and the borrower, Yixin's third-party account holder acts as the debt transferor for lending and borrowing, that is, the third-party account holder becomes Yixin's lender first, and after Yixin selects the borrower, the third-party account holder transfers the creditor's rights to the real lender. For each borrower recommended by P2P credit service platform, the lender has the right to decide whether to lend to the borrower of Yixin portfolio; The borrower repays the loan every month, the lender can dynamically know the repayment, income and other information of each creditor's right every month, and the lender can get the principal and interest repaid in the second month. Of course, lenders can also choose not to collect money but to continue to look for the next borrower in Yixin. This model was initiated by Yixin. Yixin mode has two main characteristics: Yixin's security system from the perspective of Yixin's operation mode, Yixin has stronger control over borrowers, and lenders
被战争、民运和动乱裹挟、令所有人局促不安的的七十年代的脚步正渐渐靠近，佩琪在这个女性崛起的岁月中会否选择自立门户？唐在面对内心揭开的伤痛、决绝地离开他一手创造的充满甜蜜谎言的虚伪的广告业后，会如何继续自己的人生？这个惊心动魄的时代里，他们的命运究竟将如何画上句点？
他是这场战斗的主将，如今见己方士气如虹，觉得身为主将，应该做出表率，哪能让几个根本上不了台面的小火长、队长领着大军冲杀，那像什么样子？于是，他挥动手下压阵的两千兵马。
《唐突的女子》讲述了本来是小姑子和嫂子关系的两个女人，变成儿媳和婆婆关系而发生的一系列故事。
When Python is programmed, it often deals with files and directories, which cannot be separated from OS modules. The OS module contains common operating system functions, independent of the specific platform. The following is a list of commonly used commands
Explain that in the OrderPizza method, we do a lot of things, including calling the CreatePizza method to generate a desired pizza, and then doing a series of operations on the pizza. The key point is that Pizza is defined as an abstract class, which means that in the OrderPizza method we don't care what type this Pizza is at runtime, in other words, this is decoupling. The coupling between PizzaStore and Pizza is uncoupled.
(2) Provisions on the Administration of Doctors and Pharmacists in Medical Security Agreements;
本王再从中斡旋一二，就妥了。
龙的女儿向日葵（白鸟玉季）有男朋友！？龙的前舍弟？雅（志尊淳）就职活动！？龙所属的原天雀会的姐姐？在云雀的生日会上发生了意外！？等，6个暖烘烘的喜剧被展开。
Ningxia Hui Autonomous Region
