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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.那谢过罗先生了。Netflix宣布，《纸牌屋》第六季将于2018年正式恢复拍摄。罗宾·怀特继续主演，应该就是主要聚焦于克莱尔这个角色了。不会有凯文·史派西，但是他饰演的下木总统如何处理还不得而知。跟以往每季13集的长度不同，第六季将缩短为只有8集。第六季也是这部Netflix旗舰剧的最终季了，具体回归日期待定。不过范文轲说的很清楚，范家的事情是其兄长做主的。在华盛顿特区肯尼迪中心举行的众星云集的颁奖典礼上，大卫查普尔被授予著名的马克.吐温美国幽默奖。S is the shutter, setting the shutter speed.17岁演员入江甚仪将首次主演由手机小说改编的同名日剧《金鱼俱乐部》，一同合作的是14岁演员刈谷友衣子。《金鱼俱乐部》讲述无所事事的少男（入江甚仪饰）和孤独的少女（刈谷友衣子饰）两人相遇后组成“金鱼俱乐部”，透过社团活动互相走近，相恋的故事。