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花生气得嚷道：你……你赌了九十万，还说我不务正业……他实在拿这小子没法子。"Is-A" refers to the "one" of one class and belongs to another class, while "Has-A" is different, which indicates that a certain role has a certain responsibility. A common reason for the wrong use of inheritance instead of aggregation is to mistakenly treat "Has-A" as "Is-A". For example:"As far as I understand it, If a mouse is the size of a domestic cat, But also rushed up in droves, It should be very dense, The goal is quite large, According to the weaponry at position 149, I don't feel too stressed, If you cooperate with the large "killer bees" to form an open space, you can also deploy some firepower to use tracer armour-piercing firebombs to the air and other weapons to the ground, whether it is a step machine gun, or rocket launchers, recoilless guns, as long as the command is proper, fire shooting, resist the attack of a group of mice, I think it is not too difficult? Is this kind of big mouse not only large in size, but also able to withstand bullet attacks? Or are they too fast to be easily hit? " I am somewhat puzzled by what Zhang Xiaobo said. He said his point of view, See if he has any answers, With the experience of strange dogs in position 142 interviewed earlier, Plus he just said that the rat moves quite quickly, So I preconceived that he would say that the reason why these mice are difficult to deal with is similar to that kind of strange dog, because the speed is fast and the movement is flexible, which leads to low fire killing efficiency and short reaction time, which leads to great pressure on position defense. As a result, I didn't expect him to give an answer that is not any one of my many assumptions:　　时间流逝犹如利剑高悬，万般无奈下，卫凯民冒险启用小分队备用方案—争取具有进步思想的国民党警察局高级警探李同。面对城市即将解放的形势，这个充满智慧与理性，追求客观与中立的男人，在两难的境地中如何自处？他又将做出怎样的抉择？Track and field is the cornerstone of the Olympic Movement and can best embody the motto of "Faster, Higher and Stronger".