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Avoid coupling the sender and receiver of the request, make it possible for multiple objects to receive the request, connect these objects into a chain, and pass the request along this chain until an object processes it. This is the responsibility chain mode. In the responsibility chain mode, it is possible for each object to process the request, thus realizing decoupling between the sender and receiver of the request. At the same time, the responsibility chain mode simplifies the structure of the object, which makes each object only need to refer to its successor without knowing the whole chain, thus improving the flexibility of the system and making it more convenient to add new request processing classes. However, we cannot guarantee that all requests can be processed in the responsibility chain, and it is not conducive to observing runtime characteristics.The output is the same as the first one, except that the adaptation method is different.Key points: Collect seedlings locally. Don't listen to other people's better artificial reproduction. In the second year, those in your pond will reproduce themselves. This is the so-called artificial reproduction. In the second year, the survival rate is high. In the adapted environment, the seedlings will not die if the original pond grows. In this way, the seedlings will save a sum of money.北边全部与项羽的西楚国接壤，都城六县更是暴lù在西楚国的强大的攻势面前，若是因为什么得罪了项羽，少有不舍便会引来西楚国的进攻，江淮一带无险可守，如何抵御西楚国的大军呢？这是一个非常辣手的问题。Hello!电影《功夫四侠》讲述了在一个遥远的神佑之地，风格迥异的四位侠客联手抵制邪恶力量，开启了神秘奇幻之旅的热血故事。　　屠呦呦（周迅 饰）：展示她研发抗疟新药青蒿素的全过程，并回答人们对其个人获得诺贝尔奖的某些疑惑。