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During this period of practice, We walk through the streets and come into contact with all kinds of people and things, which cannot be felt in the school. There may be teachers in the school who say what to do on this day and what to do tomorrow, but there will be no one who will tell you this. You must understand what to do, do it yourself, and do your best.英王马车继续前行。　　淞沪空战，震动全球，中国空军以弱胜强，重创日本空军，创造了世界空战史上的一个奇迹，高志航及飞鹰队成为了国民英雄。为了壮大中国空军，高志航领命前往苏联接运一批新飞机回国，途径周家《生田家的早晨》在日本台晨间情报节目《ZIP！》内播出，每一集7分钟，共13集，讲述生活在东京的生田一家早晨忙忙碌碌的样子。故事讲述从小是好朋友的四人：枫、薰、ミチル、えみ，在えみ的婚礼上重遇。那天枫工作的公司突然倒闭，被男友甩了，在30岁事业爱情双失。枫决心要实现儿时当面包师傅的梦想。虽然后来在面包店得到了工作，但是枫遇到了很多职场困难。在高级美容店工作的薰、极贫的包包手艺人ミチル和新婚生活的えみ，四人生活会出现好多的变化。四人在恋爱、工作和生活中如何成长，四人的明天会是晴天，还是阴天？Finally, I would like to talk about the choice of squat belt size: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.