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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.历经明枪暗箭，初夏的校园生活越来越游刃有余，与七录的感情也日渐升温。就在这时，七录的前女友、天才少女设计师向蔓葵重新归国，成为初夏的同班同学，这让原本平静的学校瞬时暗潮汹涌！向蔓葵别有用心接近初夏，利用她重新获取七录信任，看着日渐亲密的两人，初夏内心酸楚，表面却倔强如初。执着追求初夏的贵公子江辰川抱打不平，为她出头，引得七录嫉妒连连，两人误会更深。 一年一度的设计大赛展开，初夏决定报名参赛，勇敢追梦。心中留有阴霾的七录以为初夏会像当年的向蔓葵一样放弃他、离开他，再度封闭自我，化身冰冷不近人情的恶魔。初夏疲惫应对，同一时间，有关身世的线索也渐渐浮出水面，这一切都仿佛将初夏投入满布暗礁的冰川，危险悄然而至……However, crocodiles' short, rounded and sparsely arranged teeth do not have the function of cutting flesh. Their main function is to hook and inject the skin of prey during hunting to prevent prey from escaping. Land carnivores pay more attention to chewing, so they do not have such function.The opening of the submarine main valve means that the ship is in danger of sinking. Lu Rongyu 2682 has to send out a distress signal, but distress will be found.Jia Hongwei is responsible for assembling messengers, Weng Siliang is responsible for logistics, and Sony is responsible for sailing.季播综艺节目《最美重聚》节目于10月25日首播,是一档集合往届快男超女的真人秀访谈类节目,播出平台为BTV所以这次苏角和番邑军算是功不可没。