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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 ~ ~再说，我最近恐怕要一直住在赵叔家。Zhang Xiaobo blinked after saying these words, After a pause and a sigh, Like every veteran interviewed, these are memories they don't want to mention again. His expression told me more that he must have remembered something more that made him feel heavy-hearted. I saw the details of his facial changes after writing the interview information just collected, and asked:吃饭慢点嚼，就不为了斯文有礼，也要想想这衣裳——弄脏了哪来许多换的呢？黑娃的黑脸变得黑红，低头沮丧道：我没小心弄的。　　青青道出整件事的因由是十年前师父被杀的一天而起，血狼希望得镇门之宝“豹头刀”，而杀师父并装成假死。而回来请罪的真真更指出银盒内的乃是一张感光纸，原来是血狼杀师父的情形的即影即有相片。黑豹因此决与血狼决一死战，更以苦练而成的盲侠听声剑击败血狼。1945年，日本妄图扭转侵华战场上的败局，用细菌武器做最后抵抗，中共地下党员李觅云和义勇军旅长刘大鹏共同制止了日军利用细菌武器进行最后顽抗的阴谋。815日本投降之后，日生化部队最高长官鬼冢潜入地下，寻找曾被他植入致命病毒的三名携带者，想再从她们体内提取样本，研制升级版的病毒对我军进行反攻。同时，盟军准备以战争罪起诉天皇，生化部队秘密研究细菌武器的证据将对天皇极其不利，日方秘密派人进入东北妄图销毁所有证据。李觅云和刘大鹏坚持不懈对鬼冢进行追捕，最终粉碎日本军国主义企图靠病毒武器东山再起的阴谋。　　岛上，孩子们想尽办法让大壮说出情报，但大壮信守承诺。在狗剩爷爷的帮助下，大壮即将见到飞虎队。此时，有传言说大壮的二叔田二叛变，大壮为证明二叔清白，只身离开小岛，到临城找田二。