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老九找几个老回回一道出征，以证我军善意。"The rest of the people are drinking and eating. After the meal, I stayed there for a while and went back to sleep. That night I slept in the shop of Jiang Xiaolong, the twelve people above. Jiang Xiaolong didn't let me go down and said, 'You sleep here, don't go down'.This is the basis of the opening and closing principle, and the specific content: interface-oriented programming, relying on abstraction rather than concreteness. When a specific class is used when writing code, it does not interact with the specific class, but interacts with the upper interface of the specific class.Indoor hydrant system你老人家就不要显摆了。结果娘家婆家一齐出动……况且我娘最讨厌男人娶几个媳妇的。It is precisely because the seriousness of learning this matter belongs to education in a broad sense that the cost of making content is very high. From the syllabus to the courseware to the final presentation form, many adjustments and corrections need to be made.