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　　古装悬疑网剧《侠探简不知》由优酷、同欢传媒出品。知名导演刘一志监制，新锐导演马艺恒加盟执导，于济玮、王燕阳、王若珊、马泽涵等主演。讲述了失忆侠探简不知，为了查出神机谷真相寻找杀父真凶，独自闯荡江湖的故事。并在探案过程中，结识了好友和挚爱。该剧将于2020年优酷全网独播。In the first part, we will first discuss the explosive arrow. First of all, the next conclusion is that the explosive arrow is related to the damage of fire elements and has nothing to do with the damage of toxic elements.Craft and TraditionPeter Boyd探长指挥着一支经过多种训练的警探和科学家的警察队伍-悬案小组，使用现代的方法和原来调查时还没有的新科技来专门调查的未破获的老谋杀案。马强饰演的前特工人员将被他的过去所困扰。在一场秘密的情报战中，他陷入了一场从中东混乱中获利的阴谋。This mode applies to scenarios: If we want to add new functions to an existing class, we have to consider several things: 1. Will the new functions have compatibility problems with the existing functions? 2. Will it need to be added later? 3. What if the class does not allow code modification? Facing these problems, the best solution is to use visitor mode, which is suitable for systems with relatively stable data structure, decoupling data structure and algorithm,Public void visit (Subject sub);