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小玉姐，你快看青青青木的微.博一次偶然让她得到了一只高冷高能高颜值人形高科技智能手机，曾经能把玩手机写进简历里的宅女，面对这么一位傲娇毒舌的新型手机，却变成了一个十足的手机白痴。还好这个手机够智能，美颜功能帮助形象改造，网络数据变身追男僚机，天气预报附带送伞功能，开启地图打包逛街模式。在为学长而努力改变的过程中，宅女却忽然发现，自己不知何时又重新变成了一个手机控……Observer mode: pay attention to encapsulating object notification, support the change of communication object, realize the change of object state, notify and update the objects that depend on it.你怎么……杨长帆露出了不可思议的表情，你凭什么这么多年没考上举人？徐文长闻言面露愁容：是这样的，跟我自己无关的事，我都很明白。Age: 22I 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.