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C) Metaphors of everyday life. Use some real-life examples to illustrate the so-and-so pattern, which can enable you to quickly grasp the purpose of a certain pattern and the structure of the implementation code. At the same time, you should realize that this metaphor is like telling you (2 +3) 2=22+2*2*3+32. You need to draw an analogy and come to (a + b) 2=a2+2ab+b2. The concrete application of the model in practical work is equivalent to the application of algebraic formulas.Event Pearl:Code as above; You can see, There are obvious shortcomings, For example, when I click on an element, I need to create a div. I click on the second element to create a div again, We frequently click on such and such elements, and they will frequently create div elements. Although we can remove pop-up codes when we click Close, it is not good for us to frequently create and delete them, especially for performance, and frequent operations on DOM will cause redrawing, etc., thus affecting performance. Therefore, this is a very bad habit. We can now use the monomer mode to realize the pop-up effect. We can instantiate it only once. The following code:After this time the mines have come into play, The company commander also ordered us to take advantage of the gap between operations. To replace the mines that have already triggered the explosion with new ones, I was one of four people on this mission, I remember when I went down there, I saw the bodies of the dogs, I can't help but look at those who were killed by steel balls but were relatively complete. There is one place I am very strange: although they were beaten by steel balls and lay there dead with holes, they had no blood at all, but there were some green things around the bullet holes, which was disgusting to look at. "　　生命诚可贵，握手价更高，女神的见面不能等！袁非的世界中心就是三件事，追星，追星和追星！但用力过头的下场，就是学分不够用。袁非只好蒙骗他的冤家发小，郁佳，成立柔道社，让自己捏造比赛来获得世(bì)界(yè)冠(xué)军(fēn)的伟大梦想，得以成真。1930年代的魔都上海争夺名利、明争暗斗、纸醉金迷。被视为阮玲玉接班人的"电影皇后"孟思凡(林心如 饰)、出身大帅家庭的不知名小导演顾维邦( 杨祐宁 饰)等一班寻求着各种自身所需的青年人，也把这里当做梦想的孵化器。该剧以远古帝王大舜传奇曲折的一生为主线，讲述了尧、舜、禹三代历经磨难、治理水患，为民造福、成就伟业的故事。