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Although there are subclasses in java that implement the interfaces of the parent class, But I think javascript can be different from java, It is possible that the parent class in java is an empty class, Subclasses to implement the interface of the parent class, in javascript, I think the common code is completely written in the parent function. If the business logic needs to be changed in the future, or new business logic is added, we can completely use subclasses to rewrite the parent class, so the code has strong scalability and is easier to maintain. Since I am not a professional java, please understand if there is any mistake in describing the knowledge points in java ~ ~Norton Security with Backup (up to version 22.6. X.x)现在我们有范白全力支持，趁着范文轩新丧，他们忙做一团，我们好尽快拉拢族人。泰国男星son首次搭档mook主演的泰国爆笑爱情剧《你是我的毒玫瑰》，剧情讲述毒舌帅医生和娇蛮女孩的“假交往”真相爱的浪漫爱情故事。大头儿子的爷爷——老头爷爷是个老北京人，做得一手传统京味菜，把大头吃得赞不绝口。大头在幼儿园一番宣传，说自己每天的晚餐如何如何丰富，说得小朋友们馋涎欲滴。超市老板的儿子胖嘟嘟当晚被邀请到大头家，品尝了爷爷做的面条，差点儿连舌头都吞了下去。 但是胖嘟嘟的爸爸妈妈却在烦恼。小区旁边新建了一座大超市，物品全，价格低，而且离小区非常近，把胖嘟嘟家的小区超市挤得够呛，简直是门可罗雀。两口子烦心不已。　　刘雨林往哈尔滨找飞机遭遇敌特袭击，险些丧命；在通化机场，报务员收到奇怪消息—“13号攻击成功”，敌特若隐若现。刘雨林率队来到731旧址，找到隐藏飞机的洞口。由于鲁八不小心碰碎毒气瓶导致众人恐慌，继而导火索被点燃。为阻止爆炸，刘雨林感染病毒。通过闫铁所设之局，嫌疑人一个个被排除，一切变得扑朔迷离。景王和英王、王丞相和赵耘同时出声喝道：大胆