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Disadvantages: There are a little more node objects in the responsibility chain mode. It is possible that most nodes do not play a substantial role in a certain request process. Their role is only to make赵锋只盯着那将旗，并斩杀一切敢于阻挡的人，两侧的人都由葫芦等三人清理。他满心不快，咬牙决定，下次一定要尝尝这个知了虫到底是个什么味道，竟令她如此青睐。《网红的疯狂世界》是2019年三立华人电视剧周日十点档系列的第四十七部作品。由吴思贤、项婕如、言明澔、卓毓彤领衔主演。2019年8月15日开镜，将于9月8日播出，接档《月村欢迎你》 。Answer: The similarity of these three modes is that they all serve as an intermediate layer between the client and the real used class or system, which plays the role of allowing the client to indirectly call the real class. The difference is that the application occasions and intentions are different.The above analysis shows that one of the first three situations will inevitably occur after intercepting down, so intercepting down is no longer considered here. Let's look at the difference between events after intercepting down.