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Public void del (Observer observer) {在遥远的北方，曼斯·雷德将各个野人部落团结起来，组建起一支维斯特洛大陆从未见过的庞大军队。只有守夜人军团能够阻挡她入侵七大王国的步伐，但守夜人军团司令率领一支小队北行之后至今未归，没有人知道他们发生了什么事情。狭海的另一端，丹妮莉斯与自己的龙子团聚，她和部从开始寻找新的战船和盟友。民国时期，古玩界新晋第一人沈庆之在拍卖大会上得罪了外国人，为了不让外国人霸凌中国古玩界的奸计得逞，在张三爷的帮助下与他们斗智斗勇，凭借沈庆之亲手所造听风瓶在鉴宝大会上一举扬我国威。拨开枝蔓遮挡，先小心谨慎观察了河面的情形，这才急速划船往对面划去，河面上荡起一圈圈波澜。In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.The shape design of weightlifting belt is also varied. The standard weightlifting belt is narrow on both sides and gradually widens to the middle. Weightlifting competition belt, generally width is not more than 12cm, thickness is generally not more than 10mm, 5-8mm more. For the use of weightlifting belt, due to the relatively large number of movements in the whole process, squat down deeply, generally do not need to be pulled too tightly, and the hardness of the belt does not need to be too large.