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Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.高易急忙拉住周大，低声道：怎地如此莽撞？忘记礼数了？周大这桂已起，面前之人是越王，已经不是那个带着自己在树林之中转战对付秦军的老大了。于嬷嬷喜得红光满面，连连道：嗳。2013.07-起风了Sorting out content benchmarks. What kind of content users contribute, taking as an example, is reflected through the recommended content. For example, when Zhihu first opened through the invitation code, when you saw that the answers inside were very long, you were ashamed to write very short content.　　気付くとそこは、空の上に浮かぶ石の迷路があったり、ポケモンが大きくなったりする、とっても不思議な場所。刑警队一日接到全市最大商场统一百货报案，声称有人敲诈该公司老总陈金堂，并以炸毁百货大楼相要挟。刑警队长程东带领的重案组紧急出动，调查这一起带有黑社会性质的敲诈案，在苦无线索之际，竟发现该案与盲女绑架案、市长助理被杀案、高速公路收费员被杀案有丝丝缕缕的关系，而且犯罪分子手法干净利落、手段残忍，种种迹象表明有一个黑社会集团在周密地操控着一切，当重案组历尽艰辛调查案件，并快要接近事情真相时，队长程东因涉嫌奸杀三陪小姐而身陷牢狱，令刑侦局长也被勒令休假，此时人性受到考验，善恶是否分明、黑白之分是否绝对。