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The world is very complicated, full of phenomena, facts and various viewpoints (insights, lies and deception). We need to extract the consistency behind them in order to quickly understand and understand the world. This consistency is the dimension in the classification. The classification of the three worlds is just to find a classification method for countries that we have not used before. The traditional classification of countries is based on geographical location (five continents), population (large and small countries) and development stage, while the three worlds are classified according to their relationship.State mode refers to allowing an object to change its behavior when its internal state changes. The object seems to have modified its class. Divide this sentence into two parts by commas. The first part means to encapsulate the state into a separate class and delegate the request to the current state object. When the internal state of the object changes, different behavior changes will be brought about. The second part is from the customer's point of view, the object used has completely different behaviors in different states. The object seems to be instantiated from different classes, but in fact this is the effect of using delegates.(two) the maintenance room meets the requirements of the variety and quantity of fire extinguishers, and the construction area is more than 100 square meters;Step 5: Enter the task, take Ghost Medicine G, and increase the basic attack power by 7在2×01《One Year In》中，Tom Kirkman担任美国总统已满一年，他致力于重建美国首都，抓住发动灾难性恐怖袭击的幕后黑手。可是当乌克兰民族独立主义者劫持一家俄罗斯空军飞机之后，这位新总统的外交能力在人质危机中将面临终极考验。Paulo Costanzo本季扮演白宫政治主任Lyor Boone，Ben Lawson扮演英国军情六处特工兼Hannah Wells的新爱情对象Damian Rennett，Zoe McLellan扮演白宫顾问兼律师Kendra Daynes，他们均为新的常规演员。难以捉摸的连环杀手每年都会降落在一个小镇上，并年复一年地应对可怕的谋杀案负责，每起凶杀案似乎无关。 没有人相信这可能是同一杀手。 侦探迈克·丹佛（奥马尔·埃普斯）（Omar Epps）之前曾面对过特里克（Trick），他开枪打死了他，并杀死了他。 否则所有人都会告诉他。 但是，丹佛知道特里克仍在那儿，他回来报仇…In the http protocol, the http header has a continuous "\ r\ n\ r\ n" as the end flag, and many web servers will wait for the header transmission to end before processing the http requested mop information. Therefore, if the web server does not receive a continuous "\ r\ n\ r\ n", it will always receive the data and maintain the connection with the client.