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The observer mode defines a one-to-many dependency relationship, allowing multiple observer objects to monitor a certain topic object at the same time. When the state of this topic object changes, all observer objects will be notified so that they can automatically update their behaviors. The specific structure diagram is as follows:永平帝这才开口道：刚才这两桩事。故事延续《终极一班2》结尾中，被改变的金时空未来接续开始。由于金时空的未来已被雷婷和中万钧改变，因此在本剧中，战力指数和K也回归。呼延觉罗·修告诉汪大东灸舞盟主新下的指令，要汪大东调查金时空最近战力指数异常飙高的现象，所有线索都指向芭乐高中，所以盟主传汪大东回去调查的原因，虽然汪大东已经28岁了而且也不想回芭乐高中，但是汪大东高中并没有毕业，也没有反对盟主的权利，所以只好回芭乐高中继续就学。新的故事也要展开了……All listed in the form of a list, which does not distinguish between directories and files.然赵锋的婚事，勾起了几人的心思。"I remember we had a very clear division of tactics at that time, First, adjust all the automatic rifles in hand to semi-automatic shooting mode, Of the 15 men, apart from the gunners and the bazookas, Most of the others use '81 bars', There are also a small number of 63 types, I'm using the 63, One of the characteristics of this gun and the 81-bar is that the single shot accuracy is especially good, Even better than '56 and a half', Much better than 56 Chong and some Mao Zi guns captured from the Vietnamese, At that time, in order to give full play to this advantage in precision, The company commander ordered us to use this tactic, The concrete implementation is to use heavy machine guns to suppress fire in hidden places, In addition to killing as many enemies as possible, If the enemy takes tactical actions such as lying down to avoid shooting, Then use machine gun fire to limit its movement range, That is to say, they are suppressed in situ, and then rifles are used to give full play to the advantage of high semi-automatic shooting accuracy, giving them "roll call" one shot at a time. This tactic is still very effective in dealing with the first and second large-scale attacks, with extremely high efficiency, and almost all the Vietnamese troops who came up were killed on the way to attack.