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　　暖男气质将尽显无遗。而郑丽媛将在剧中出演已工作8年的音乐节目PD，虽然性格大大咧咧，　　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.人对了就好。贤杰向他初恋的苏门答腊人坦承了他的爱，但她犹豫不决，他最好的朋友宣告了友谊的终结。他们并不同情贤杰，他就在死亡的眼前，只想着自己。不为人知的事情发生在贤杰周围。有一天，一种奇怪的口音出现了，混乱的日子自然又回来了。Case: For example, for an important work at different stages, due to its importance and time constraints, the Company specially held a special coordination meeting to clarify the work that various departments need to cooperate in the implementation, and also stated that various departments should fully cooperate, and sometimes even directly authorize the responsible persons of the departments concerned to have special rights to coordinate the overall work. However, when cooperation is often needed, the situation will not be as fully coordinated as stated at the meeting. Dispatching a person needs to ask for instructions from the person's department head. After contacting the department head, the department head also needs to ask for instructions from the competent leader. If the leader arranges, it will be implemented.