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Advantages of intermediary mode: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.苏角站在城头，看着远方连天的闽越大营，一脸凝重。This is a luxurious banknote collection book that integrates your surname (or first name) and your birthday banknote with the same number. For example, your name "Zhang San", then the cover of this set of brochures will be engraved with the word "Zhang San". It is a collection of great collection significance specially tailored for you, and the customization time will be 5 working days. As the fifth set of RMB is continuously consumed, there is unlimited room for appreciation. Therefore, this set of collection books is suitable for the whole family to collect, give away relatives, friends, leaders, etc. It is suitable for both collection and gift-giving. Warm recommendation以及后赶来的葫芦，大家都聚在偏殿紧急磋商。在2017年7月8日，当地9点—9点半在东京电视台开始播出《双室小吃车》改编自裴慧洙(音)的网络漫画，讲述了在深夜偏僻处出现的一个神秘的小吃摊的故事。