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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.跟父亲直说，我寻思着做点产业，要千户帮忙。A. Men: single paddle, double paddle, double paddle without helmsman, double paddle without helmsman, four paddle without helmsman, four paddle without helmsman, four paddle with helmsman, eight paddle with helmsman;2015年泰剧《妒战主播台》又名《心浮星沉》、《争夺女主播》，本剧主要讲述在新闻职场里的尔虞我诈，权利争夺战。[2]当天，凪偶然遇到名门女子学校的女高中生天野绘里香，为了帮助不想和未婚夫结婚的她，他答应了她的请求，半强行地扮演了她男朋友这一角色……板栗气极了：这话说的，难道为了演习，让蛇咬一口还是好事了？他迅速从腰里抽出一条带子，从膝盖处把腿扎紧，阻止毒气上行。小馨，这是陈启，《白发魔女传》、《第一次亲密接触》的作者，你不是一直说他的《白发魔女传》写得好看。