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吕文心坐在贴着玻璃墙的一个座位，正在喝着汽水。So the visit was made:"As long as they are hit, they are basically shot one at a time. The lethality of steel balls is much smaller than that of bullets. A dozen or twenty bullets can also kill one. They are animals after all, and they are still afraid of bullets. However, the speed is fast and it is really difficult to deal with." Liu Guangyuan said.I nodded at this passage, Understand that what Zhang Xiaobo said is indeed reasonable, It is not a lie, Here I think it is necessary to give you one thing about popular science. So we have to say something digressive: The result of a real bullet hitting a petrol tank is not the same as that shown in most movies. One shot can explode the petrol tank, But this is not the case, Although a pure metal projectile will rub against the air at a speed of hundreds of meters per second to generate equivalent heat, And will produce sparks after hitting the metal oil drum, But none of this is enough to ignite petrol, Especially for gasoline with a large total amount, to ignite gasoline, please remember one thing-open flame must be used. In addition, gasoline is a flammable item, but it is not an explosive item in the true sense. Only after reaching a certain total amount can explosion be caused. If the total amount is insufficient, it can only cause combustion without explosion.黄瓜和山芋上前扶起玉米，帮他检查后面。年轻女孩郝欢喜深受过世警察父亲郝仁影响，立志成为一名人民警察。警校四年，她与同学：游春风、裘美、叶雯、鲍栋建立了深厚的友谊。一次偶然的KTV试唱，欢喜等人卷入了一宗警方调查已久的贩毒案件，嫌疑人被抓获却暴毙狱中，线索中断。他们了解到：贩毒集团由代号君子兰的神秘人物控制。毕业后，欢喜等人入职警局，成为贩毒专案调查小组成员。在调查过程中欢喜发现父亲郝仁与该案有关，种种证据表明父亲是一名变节卧底，她精神奔溃跌入低谷。经领导和同事开导，欢喜重新振作，决心还父亲清白。经过众人的努力，君子兰被抓获，此人正是养育鲍栋成人的叔叔倪鲲，历时已久的贩毒案终于告破，证实郝仁清白。办案过程中的种种曲折、牺牲，让欢喜等人真正领悟到了人民警察使命和精神