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The full name of DDoS is Distributed Denial of Service, which means "Distributed Denial of Service" in Chinese. Commonly known as flood attack, DDoS uses a large number of legitimate distributed servers to send requests to targets, thus causing normal legitimate users to be unable to obtain services.Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.Ten fairies和红军将领以及苏区群众的感召下，他毅然放弃美国优越的生活，留在延安参加中国的抗日战争。他曾经有三个梦想，第一个梦想是娶了中国妻子苏菲；第二个梦想是中国的抗日战争取得伟大的胜利；第三个梦想是成为一个完全的中国人。在经历了十四年的艰苦奋斗，马海德由一个自由主义者变成一位坚定的马克思主义者，他1937年加入中国共产党，参加过红军、八路军和解放军，长期战斗在我军的卫生战线，和白求恩、柯棣华等国际主义战士一同，为中国革命做出了伟大的贡献。他不但实现了三个梦想，新中国成立后，他新的梦想是为中国性病和麻疯病的彻底根除而努力奋斗。If you have any questions, please consult customer service.　下面是一个鸡兔混血的年轻英雄。尽管存在差异，但他渴望融入并感受到被爱，尽管他笨手笨脚，他却沉迷于冒险。老杨却抬手道：你别走。