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以中国传统相声为蓝本，在搜集的近三百部传统相声段子中，精心挑选了32个内容健康、艺术性佳，群众喜闻乐见的段子，去其糟粕、取之精华加以改编创作而成。The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.In the "Learning Power" client, besides updating reports involving General Secretary Xi Jinping in a timely manner like the website, there are also some special columns. Such as "using allusions" and "one sentence per day". On January 7, 2019, the "Daily Sentence" column focused on "Xi Jinping's Talks on How Leading Cadres Make Use of New Media" and excerpted a passage from his important speech on October 9, 2016 when he presided over the 36th collective study of the Political Bureau of the CPC Central Committee on the implementation of the strategy of strengthening the country through the Internet: "Leading cadres at all levels should learn, understand and use the Internet, and actively plan, promote and guide the development of the Internet. We should correctly handle the relationship between security and development, openness and autonomy, management and service, continuously improve our ability to grasp the laws of the Internet, guide public opinion on the Internet, control the development of information technology, and ensure network security, so as to continuously push forward the construction of a powerful network country. " Judging from the number of more than 100 messages and the number of comments from users on a single message, the overall reading volume of this column should be relatively high.The foundation of SYN flooding attack is the design of three-way handshake when TCP is used to establish connection. The third packet verifies that the connection initiator has the ability to accept the packet at the source IP address used in the first request, that is, its return is reachable. Figure 1 shows the process of exchanging packets at the beginning of a normal TCP connection.　 一群曾被宣判为“再也不是军人”的囚犯，在监狱里，要证明自己依然能像勇敢的士兵那样战……给付宇锋签过名后，陈启觉察到顾小玉和苏小梨也在眼巴巴地看着，也帮她俩签了名。还没有一个类似苏樱的角色出现，我才会感到奇怪。