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In essence, classification is to find the common points and differences of things in our thoughts. It is the basic method and ability for us to know and understand the world. On the basis of classification, it is possible to judge and reason, and to form concepts and make decisions. Classification requires comprehensive demonstration activities such as association, analogy, reasoning and extension, and is the basic cell of thinking.吉他兄弟方清明、方清华从贵州省遵义市正安县凤竹村老家跑到广州吉他厂打工谋生活，从白手起家变成吉他厂老板，又回乡创业，建设美丽家乡，打造民族吉他品牌的传奇故事。“三百娘子军”之一的林美心在广州打工一年后离奇失踪。十五年后，她的两个儿子沿着母亲走过的道路再次来到广州，清华认识了冷静多智的安静和美丽多情的苏妹，由此展开了与这两个女人长达数十年的爱恨纠葛。清明则与青梅竹马的吴小娜结婚生子。几番商海沉浮，兄弟俩肝胆相照互相扶持，几多人心诡谲，他们不忘初心反哺思归，用满腔赤诚回报贫苦家乡。正当兄弟二人产生分歧、分道扬镳时，一场更大的想要搞垮中国吉他制造行业的大阴谋席卷而来。清华与清明勠力同心，在母亲林美心的帮助下参加世界吉他制造大赛，并以凤鸣吉他一举夺冠，中国民族吉他品牌屹立于世界吉他品牌之林。8-2 Favorite_book (): Write a function called favorite_book (), which contains a formal parameter called title. This function prints a message such as One of my favorite books is Alice in Wonderland. Call this function and pass the name of a book to it as an argument. ?AMC剧集《广告狂人》的情景设置在二十世纪六十年代的纽约。在充斥着性，固化以及极富煽动力的生活模式下，一群男男女女们干劲十足，勇于竞争，即使撞得头破血流也依旧在麦迪逊大街书写着他们的广告传奇。那是一个被利益驱使着的世界，广告精英们的故事一直在继续。现实主义青春剧《其实不想走》（14集） 一部真实亮丽的当代正剧，一首震撼人心的青春之歌。 一次次由西向东的人生遭遇，一次次由东向西的艰难抉择。 患难与共的手足之情，相濡以沫的同窗之情，舔犊情深的母子之情，生生不息的赤子之情，在这里一一得到了感人至深、催人泪下的出色表达。 故事梗概 1996年夏天，黄土地的一个贫困乡村。 梁亮、梁明兄弟分别被上海华东大学计算机系和西北大学某系录取，但因家境贫寒无力支付8000元的学费。父母卖掉了家里所有值钱的物品，东借西凑，最终只搞到了一个人的学费。无奈，母亲只得让兄弟俩抓阄决定各自的命运。结果，弟弟抓到了。就在乡邻们前来力梁明送行的时候，梁明毅然离家出走，把珍贵的机会留给了哥哥——他用这种方式来报答哥哥停学两年直到他高中毕业的恩情。In TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.《渴望城市》第二部记录下了生存在城市边缘的外来工的生活状态，延续前作的现实风格，带有本色的纪实性，除了聚焦普通人群的感情，剧中的演员基本上都是群众演员，其中有进城做保安的却深受噪音干扰精神崩溃的农村青年，为生计被逼当上陪酒女郎的年轻女孩，以及无法过上正常夫妻生活导致家庭悲剧的民工夫妇。他们已不是贺岁片《天下无贼》里挣6万块钱然后回家盖房娶媳妇的傻根，他们已寄希望于自己能获取与城里人一样的地位与尊严、权利与机会。