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One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.Another goal of the RFEE specification is to meet the low pin count design requirements of master (RF IC) and slave devices, thus saving expensive I/O costs at the package level and reducing traces on the PCB by using a bus system that can connect all components. In any highly dynamic usage, real-time programming and high-speed, low-latency instruction transmission are absolutely necessary for precise timing control. This is also necessary to provide the function of front-end device status.这是一个都市性感美女用宝盒满足欲望的故事。性感妖娆的物质美女胡蝶在朋友们给自己举办的22岁生日聚会上得到了一个神秘人送的宝盒。神秘人声称此宝盒能满足胡蝶所有的愿望，只要胡蝶把自己想要东西的名字写在卡片上放进宝盒里，愿望就会实现。此后，欲望爆棚的胡蝶先后写下各种自己想要的东西和钱财，而在她每次得到一样物质和钱财的同时也会伴随着一宗罪恶的发生，欲望不断递增罪恶就不断升级，罪恶的升级，连续的命案让胡蝶心理逐步走向恐惧自责的深渊，其实这一切最终都源于一场精心策划的阴谋……萧何道：此人名叫韩信，淮阴人，曾在项羽手下任执戟郎。即便是要和谈，也是在尽力一搏之后。