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生活困苦，不宜重税压榨，应采用怀柔之策，激励民心……李敬文含笑看着她，听她侃侃而谈，有时也插上一句，浅述自己的看法，不知不觉。该剧根据1996年前FBI探员约翰·道格拉斯（JohnDouglas）和马克·欧夏克（Mark Olshaker）的著作《心理神探：美国联邦调查局系列犯罪破案揭秘》（MindHunter: Inside the FBI's Elite Serial Crime Unit）改编。退休后的道格拉斯深入研究犯罪心理学，美剧《汉尼拔》（Hannibal）和《犯罪心理》（CriminalMinds）中的角色刻画也参考了书中的很多案例。硬核当道，时尚出圈！2019搜狐时尚盛典12月18日时尚加冕。No.29 Song JiaHold down the mouse wheelOne 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.你睡觉真不老实呢。