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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.Unfortunately, there is not only one kind of electric light in this world. Many hotels have another kind of electric lamp, which has only one switch, but its performance is: the first time it is pressed to turn on the weak light, the second time it is pressed to turn on the strong light, and the third time it is turned off. Now the above code must be modified to complete the manufacture of this new type of electric lamp:入围2017威尼斯影展非竞赛单元，继《放牛班的春天》后，又一温暖人心法国小品！将满50岁的杰出小提琴家西蒙，因缘际会到巴黎一所初级中学，以音乐安抚躁动的学童，带领他们有向上的目标。　　而阿尔弗雷德·波登则与他完全相反，这位天赋极高且非常富有创造力的魔术天才因为不修边幅和天真的个性而显得有点格格不入，更不懂得如何使用华丽的手段去表现他的魔术想法。两个人在一场一场的表演中逐渐建立了古馆佑太郎和石桥静河共同演出的电影《草莓之歌》的制作决定了。本作品是将摇滚乐队银杏BOYZ（峯田和伸）的乐曲《在这个世界的角落》（TBS系）、电影《8年后的新娘奇迹的真实故事》的编剧·冈田惠和电影化的青春故事。m.ysgou.cc描写了唯一的挚友伸二去世的笹沢コウタ和伸二最喜欢的“女神”阿酱（天野千日）的关系姓。Stocks have double-click and double-kill, as do investors themselves. Many unknown people rely on the classic record of a certain year or a certain year, and their performance has soared and their popularity has soared. This is actually a double-click process. This is undoubtedly a lucky good thing in itself, but if you are praised for kidnapping, you will only cheat yourself in the end, and then bitter double killings are almost inevitable. There are not many fresh passages in the investment plot, and the main characters are changed frequently. An iron law in the business world is that there must be high barriers to excess returns. This bumpy truth will not change because we invest in stocks or because we choose different investment styles.A2. 1.9 Abdominal examination.