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Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.Gray-brown: eggplant, water caltrop* …Note: The singleton methods used in Android source code include: InputMethodManager, AccessibilityManager, etc. all use this singleton mode.蔡河溃堤成灾，仁宗责令包公（金超群饰演）查水灾成因。都水监杜平向包拯禀明水患皆因王公大臣于蔡河两岸私建楼台，导致河道受阻所致。公孙策（范鸿轩饰演）另发现溃堤乃偷工减料所致，而罪魁祸首竟是杜平的舅父罗琼。罗琼害怕，请杜平之父杜斌出面，并将珍珠衫献给庞贵妃。但珍珠衫却让包拯查明了溃堤的主因及一段昔日悬案。武科状元海铭仪表堂堂，但展昭（何家劲饰演）看出海铭枪法隐有契丹武士的特征，并据此查出海铭乃契丹奸细。日本天皇将暗香公主送来与大宋和亲，被仁宗封为和妃。庞妃常与和妃往来。仁宗被和妃迷住。和妃突然流产，庞妃被疑为凶手。包拯却查出日本藤原家族意欲篡夺大宋江山的企图。八王爷（龙隆饰演）之子赵祥怨父王当年没用自己替代仁宗，不然早已握有天下。妒极生恨的他设计陷害包拯等人，八王爷大义灭亲。Ernie Hudson扮演洛杉矶国际机场空中交通管制负责人Brooks。他知道如何读取计算机屏幕上的信息并熟练地帮助繁忙的机场理顺各条航线，但他对计算机系统具体如何运作一窍不通。是大哥板栗和葫芦表哥从小葱姐姐的灵苑过来。