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In Cihai, the classification is explained as follows: "Classification: Classification according to the characteristics of things: Book classification classifies and files documents."齐景浩、侯建白、云高洋是腾远乒乓球社的主力队员。由于成绩不佳，球社面临取消危机。球社社长齐景浩为重振腾远球社，学习“旋风球”，并邀请昔日对手厉圣加入。在历经各种挑战后，腾远球队终于向全国学院杯冠军奖杯发起冲刺。Jin Xingguo also has a tendency of domestic violence,At that tail of the warhead, the drag armour-piercing firebomb is filled with a drag agent and a fireagent, Under the pressure of propellant propelling warhead, it will spontaneously ignite to produce open flame, So it can break through the oil drum and ignite or detonate the gasoline. However, the old-fashioned traced armour-piercing firebombs have obvious trajectories due to traced light when they are launched. Therefore, it is very easy to expose oneself while pointing targets to friendly forces. Therefore, the new tracer armour-piercing firebombs now equipped all start to burn and emit light only after the projectile flies out of the muzzle for a certain distance (the generally set safe distance is 100 meters, which makes it impossible for the enemy to judge the firing position with tracer ammunition, while targets within 100 meters do not need to be indicated by tracer), The principle is generally to ignite the tracer and combustion agent carried by the projectile by accumulating the heat generated by the warhead's friction with the air after flying for a certain distance to a certain extent.曾以第一名的成绩考入警校，又到海军特种部队服役、退役后转入警察特工队的精英刑警。因女友的死亡成为人肉武器的车建宇（金范饰）。女友泰希因“鬼手”丧生，于是车建宇选择成为人肉武器走上复仇之路。一旦锁定目标就决不放手的他被称为“狂犬”。而头脑敏捷、清晰、决断力超群的搜查5科队长张武元（朴成雄饰）。正义感十足的张武元在一旦偏失所有责任都消磨殆尽条件上组建了不被外人得知的秘密搜查队。Then we can encapsulate a written examination method with the following code: