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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.《紧急追捕》的故事发生在东北某城市。犯罪分子腰绑炸药闯入闹市区，绑架人质，寻找谢元泰勒索钱财，而这时谢元泰却在深圳诈死，化名张子贤潜回该市，策划了一场惊天大劫案，使银行的三百万元巨款遭劫，无辜群众喋血街头。刑警队长江武率刑警与罪犯展开一场紧急追捕的生死较量。在追捕过程中，刑警遗孀李群英的感情被罪犯所蒙骗；案犯何必杀人灭口；年轻的刑警英勇献身；张子贤跳楼潜逃；三百万元巨款不知所踪；一个隐藏更深的黑社会浮出水面；刑警队的副队长行为诡秘……这一切编织出一个又一个引人入胜的情节。整部戏在爱与恨的交织、情与法的冲撞、情场与战场的纠缠中进行。　　继位不久的年轻皇帝朱允虽少年英武，大智大慧，却有些愁眉不展。朝外有三藩(云南王，齐国公，蓟州侯)势力逐渐坐大隐患，朝中有舅舅文章把持朝政，宫中有文章之女文媚儿专横跋扈，太后又对这个侄女宠爱过度。朱允虽为皇帝，却大权旁落，内忧外患使宫中的他十分不自在。于是他想方设法出宫查民心、访民情，同时也让自己享受些自由时光。Join the army of chasing more. Although I have long been accustomed to paranormal, it is the first time I have seen this type of paranormal.　　一群荷尔蒙分泌过往的年轻人，一段张狂而跋扈的残酷青春。 谁爱谁？谁不爱谁？重要么？ 谁是谁？谁不是谁？谁在乎？年轻的天空总呈现魔幻般的彩色，当日复一日的乏味生活让我们无法忍受，就注定了叛逆的因子要从此刻爆发，且一发不可收拾。那澎湃卷涌的蘑菇云会遮天蔽日，冲破万物，直上云霄。 一生只得一次的半熟时光，难道不能用来挥霍？ 莫非必须要用一份漂亮成绩单来换取一盎司的大麻？那不是我们，我们想到就说，有屁就放，肆意狂妄，横冲直撞。其实就是偏心嘛。