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During the establishment of a tcp connection, If the server returns syn and ack messages, The client does not confirm it for some reason. This is because the server needs to retransmit the syn + ack message and wait for the client's confirmation message until the tcp connection timeout. This state of waiting for the client to confirm the connection is usually called a half-open connection. The half-open connection will be kept in the connection table of the server until the connection is disconnected.8-5 Cities: Write a function called describe_city () that accepts the name of a city and the country to which the city belongs. This function should print a simple sentence, such as Reykjavik is in Iceland. Specifies a default value for the formal parameter used to store the country. This function is called for three different cities, and at least one of them does not belong to the default country.Updated October 8主人公戴克斯特（Dexter）童年时候和他的哥哥被关在在迈阿密船坞里的装满发臭尸体集装箱里，在两英寸深的鲜血里泡了两天。其中一具被电锯杀手谋杀的尸体是他们的母亲，兄弟两人都目睹了母亲被残忍杀害。苏角尚未离开蒲俊的营帐，属下亲兵来报：将来，适才营地门口有人射来这个。《青春夜佰味》选择以美食为介，探秘高校周边，用独特的视角来观察与学生息息相关的饮食生活，在如此快节奏生活的当下，亦让踏入社会生活的人们，回忆起学生生活时共同排队吃过的美食，以及那深夜相伴宵夜的同窗。再简单的食物都有自己的灵魂，而人生的很多味道亦是无法复制，青春时酸甜苦辣的那些百种滋味，也正是记录此间时刻的真实动人之处。2008年奥运，跆拳国手苏丽文与宋玉麒虽然没有拿到金牌，但是他们的跆拳道精神却感动了全球观众，在当今全球金融风暴来袭、全球暖化之际，大家都在疾呼要节能减碳、改变奢华浪费的生活价值观，学者也提出电视传媒是影响阅听众最大的效应传媒体，不应该只做些叫大家如何花钱买名牌或如何嫁入豪门，不符现实生活的节目内容。