92极品少妇福利视频在线久久久久久人妻一区二区三区

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.2.1. 3 Design requirements for the direction of travel of the PCB该剧描述了维京人鼎盛时期的故事，他们在当时的北欧地区处于统治地位，因为喜好海上劫掠并不断对外扩张，被人们冠以「北欧海盗」的别号。该剧将侧重于描写维京人的生活、贸易、探索及对外侵袭。The only way to implement this interface is PhoneWindow. Then let's look at the source code of PhoneWindow:During this period, all the people present registered the investment information and list, and several of my investor friends, I also entrusted Dahei to help register:　　陈梓浩（蒲巴甲 饰）是一个保守务实的钻石男，一次偶然的机会，他遇到了偷跑回国的海归女叶婷（江语晨 饰），在叶婷强烈的爱情攻势下，陈梓浩开始了人生中第二次恋爱。虽然他和叶婷在爱情观上有很大差异，但是他仍然鼓起勇气准备向叶婷求婚。就在这个时候 ，叶婷却突然消失了……