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Although the above code can meet the requirements, it is not easy to expand and difficult to read. If I want one or two conditions in the future, if I want to recharge 300 yuan successfully, I can win the 150 yuan red envelope, then I have to change the code inside at this time, so the coupling between business logic and code is relatively high, and I accidentally correct the wrong code. At this time, we try to use the responsibility chain mode to transfer objects in turn to realize it."I am from Beijing, Ancestors raised dogs for the imperial court, The dog was not the pet of the nobles, Even royalty racing dogs, One by one, They are very expensive, In terms of seniority, it is a matter for my great grandfather's generation to move forward. Therefore, the family has inherited dogs from generation to generation, I have also saved up a lot of ancient books and materials in this field, Some of them were found and burned in the period of breaking the Fourth Old Age. Also because this was criticized during the Cultural Revolution, But it doesn't matter, The key is that I can look at dogs. I have been growing up in this environment, so I have had special feelings for dogs since I was a child. You see, unless I have to use it, for example, now, otherwise I never say the word "dog" but only "dog", because this is a kind of respect for dogs. This is like describing that it is normal for people to talk about "a", that is, to talk about "only" or "bar", that is to swear.Http://gee.cs.oswego.edu/dl/cpjslides/nio.pdf……如今，《兵器谱》已经不知道更新了多少次，而每一次更新，毫无例外，必然带来一场或者多场杀戮。In popular terms, it is to use network node resources such as IDC server, personal PC, mobile phone, smart device, printer, camera, etc. to launch a large number of attack requests on the target, which leads to waste of network resources, congestion of link bandwidth, depletion of server resources and interruption of service, making it impossible to provide normal services to the outside world, and only game over can be announced. The detailed description is shown in the following figure:然而此时两人都对彼此都产生了情愫，但碍于种种原因，两人却都没有勇气将这份爱意说出口。而另一边周璟顼为了能尽快治好自己的心理疾病，开始更加积极追求费菲，而沐晨为了能够得到海洋的注意也不断接近费菲。不明真相的众人都以为费菲走了桃花运。然而当周璟顼和沐晨的目的逐渐曝光后，费菲也开始陷入前所未有的危机之中，海洋为了救费菲更是不惜一次次用掉自己的穿越机会，最后甚至连生命都可以交付。2249