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Behavioral patterns include 11 patterns: template method pattern, command pattern, iterator pattern, observer pattern, intermediary pattern, state pattern, policy pattern, responsibility chain pattern, visitor pattern, interpreter pattern and memo pattern.External communication with a subsystem must be conducted through a unified facade object. The facade mode provides a high-level interface, making the subsystem easier to use. Each subsystem has only one facade class, and this facade class has only one instance, that is, it is a singleton pattern. But the whole system can have multiple facade classes.1936年，在甘肃境内的黄河边，一西路军高级指挥员被马家军追到黄河岸边，无奈之下壮烈投河，后在黄龙湾河滩被老筏子工高占武救起，躲过了敌人的搜捕之后，最终被众筏子工安全送走。在此过程中，穿插了众筏子工的生活、工作、爱情及相互间恩恩怨怨。剧情也涉及到马家军、地方武装、政府、土匪等多方势力，从而讴歌了筏子工等劳动人民的真、善、美，鞭挞了反动势力的假、恶、丑……/congrats (Congratulations)而且韩信还意外得知了一件事情，更是兴奋不已，心中既是好笑又有无奈。(2) Nothing in this section shall relieve the overtaking ship of its obligations under Article 13.The scenarios used in the command mode include: sometimes it is necessary to send a request to some objects, but I don't know who the recipient of the request is or what the operation of the request is. At this time, I hope to design the program code in a loosely coupled way; So that the request sender and the request receiver eliminate the coupling relationship in each other's codes.