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Gas theory: Flame retardant releases incombustible gas at high temperature and dilutes the combustible gas released from combustion to below the combustion concentration, which has the effect of gas dilution. The dilution of different gases is in the following order: N2 > CO2 > SO2 > NH3.可是接近之后，他发现有事实似乎并非如此。The sockstreet attack first completes the tcp three-way handshake the tcp connection is established, but in the last ack reply of the three-way handshake, the attacker sets its tcp window to 0 and then makes a data request. When the target discovers that the TCP window size at the receiving end is 0 when transmitting data, it will stop transmitting data and issue a TCP window probe packet to ask the attacker if its TCP window has been updated. Since the attacker does not change the size of the tcp window, the target will always maintain the tcp connection waiting for data to be sent and continuously carry out window update detection. If the attacker uses a large number of controlled hosts to carry out sockstreet attacks, the target will always maintain a large number of tcp connections and carry out a large number of window update detection, and its tcp connection table will gradually run out.隋唐末年，隋文帝次子杨广欲谋篡位，把朝内重臣视为眼中钉。李渊为了避难，准备携全家离京返乡。李渊的次子李世民因为正在和长孙姑娘热恋，不想离开京城，而长沙姑娘是位极有远见的姑娘，她劝李世民暂回家乡，用功读书，静观世变，李世民听从了她的劝告，离京返乡。途中，李世民遭到杨广“收买的，号称“洛阳第一杀手”廖无极的袭击，危难中正巧碰到押送囚徒的秦琼。秦琼击退廖无极，救出李世民。秦琼到达山东不久，杨厂谋害了隋文帝篡位，当他强迫大臣伍建章伪造遗诏布告天下。当了皇帝的杨广要去扬州巡游，下令开凿运河。贪官污吏们趁机搜刮民脂，天下大乱，群雄四起。终于被自己最信任的宇文化及杀死。瓦岗军的程咬金觉得当皇帝没趣，把王位给了谋士李密。李密便自立为西魏王，但他不思进取，开始腐化堕落不说，还猜忌部下，残忍的杀害了自己的亲密战友。而胸怀大志、深谋远虑的李世民却思贤如渴，广纳人才。于是那些叛离李密的谋士大将们纷纷投到李世民的门下，众叛亲离的李密终于被中国籍的伊朗人王世充击败。在李世民的统帅下，徐茂公、秦琼、尉迟恭、程咬金、黄连不悦地说道：怎么，你不乐意？板栗忙低头道：属下不敢。