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　　本片讲述了吴琼花从奴隶成长为共产主义战士的经历和红色娘子军反抗南霸天的革命故事，通过孩子影响孩子的方式，发扬中华民族优秀传统文化。The principle of opening and closing means opening to expansion and closing to modification. When the program needs to be expanded, the original code cannot be modified, but the original code should be expanded to achieve a hot plug effect. Therefore, a summary of one sentence is: in order to make the program scalable, easy to maintain and upgrade. To achieve this effect, we need to use interfaces and abstract classes, etc. We will mention this point in the later specific design.夫妇当各守本分，方能和睦。The basic structure of the code is seen above, but we also need an initialization method. The code is as follows:Printed board该剧讲述了拥有欲望的女人与被抛弃的女儿再会之后的故事。As shown in the above code, when the button is clicked once, the div of showcount will be automatically increased by 1. As shown above, how to use the communication problem between the two modules in the publish-subscribe mode is demonstrated.