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Endothermic theory: When the flame retardant is heated, endothermic reactions occur, such as decomposition, melting, sublimation, phase change, etc., which make the fiber dissipate heat rapidly and fail to reach the combustion temperature.《勇往直前乐拍拍》是一档全新升级的大型户外水上冲关节目，这里有最燃的闯关游戏,有最具实力的干扰战队。旋转簸箕船、魔力浮毯、独木舟、不平衡大圆盘四大关卡带你乘风破浪，解锁闯关新姿势,挑战极限乐拍拍！全新升级，全民参与，燃爆这个夏天！林依（程媛媛 饰）和男友孙伟（安琥 饰）正在如火如荼地发展着地下恋情，而此时，警察却突然来到林依的家中告诉他孙伟已经死亡多时；辰（洪辰 饰）所住的对楼每晚都出现同一频率的灯火，而与她夜夜灯火对谈的男生却仿佛和另一个女生有着不能言说的秘密；刘一豪（周柏豪 饰）时常看见对楼女子惨叫求救，然而当他通知警察进行解救时，却惊人地发现房内空无一人……这一切背后都藏着怎样的秘密？遭遇离奇经历的他们，甚至还面临死亡的威胁，为此他们不惜一切代价揭开真相。This chapter is the last lecture on design patterns. It will talk about the third design pattern-behavioral pattern, with a total of 11 types: policy pattern, template method pattern, observer pattern, iterative sub-pattern, responsibility chain pattern, command pattern, memo pattern, state pattern, visitor pattern, intermediary pattern and interpreter pattern. I have been writing about design patterns for a long time. At last it's halfway through, Writing a blog post is a very time-consuming thing, Because I have to be responsible for the readers, Whether it's graphs, codes, or representations, Everyone hopes to write it as clearly as possible so that readers can understand it. I think both I and the readers hope to see high-quality blog posts come out. Starting from myself, I will stick to it and update it continuously. The continuous motivation comes from the continuous support of readers and friends. I will do my best to write every article well! I hope everyone can give opinions and suggestions continuously and jointly create a perfect blog post!"No, the whole waist is broken and people are divided into two parts from the middle." Wang Zeduan said.The fixed number of times uses int function, for example, the induction time is 16.3 s, that is, 32 times, 16.5 seconds, that is, 33 times, 16.7 seconds, that is, 33 times.