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所以刘邦很坦然，至少不会担心楚军夜袭。Research on Current Gold Market:1.? Ventilation, before each drive, first open all the windows, conditional? Then, open all the doors.　　建平（汪明荃饰）、孝礼（秦沛饰）及景良（郭峰饰），这段三角恋情辗转一生，各人最后的感情依归，却令人竟意想不到…The above is just a synchronous chain of responsibilities, We let each node function return a specific value "nextSuccessor" synchronously, To indicate whether to pass the request to the next node, we will often encounter AJAX asynchronous requests in our development. After the request is successful, we need to do something so-and-so. At this time, if we apply the above synchronous request again, it will not take effect. Let's understand and use asynchronous responsibility chain to solve this problem. We add another prototype method Chain.prototype.next to the Chain class to manually pass the request to the next node in the responsibility chain.View the v3 version of the image: