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Answer: The similarity of these three modes is that they all serve as an intermediate layer between the client and the real used class or system, which plays the role of allowing the client to indirectly call the real class. The difference is that the application occasions and intentions are different.首战的重要性不言而喻，尹旭的机智和勇猛是出了名的，对此项梁充满信息。一所西班牙普通学校，接连九名教师意外身亡，这里一时间人心惶惶，学校关门在即。适值此时，四处碰壁的青年教师莫德斯托（劳尔·阿雷瓦罗 Raúl Arévalo 饰）来此应聘，他拥有能看到鬼魂的能力，可是根本没人相信他说的话，他被医生诊断患有精神病和妄想症，学生们谩骂嘲笑，校长气愤烦恼，致使莫德斯托在每一所学校都待不长。来到新学校的第一天，奥德斯托就意外发现5名盘桓在学校内的学生的鬼魂。本剧讲述人鱼与人类共同时代下的相互生存关系和知晓彼此身份后的接纳与共荣的奇幻故事。剧里以人鱼登上陆地后自主学习人类生活方式，期望在人类世界中能够生存为开端，在这过程中努力与人类和平共处，人类也报之以善意，并以人鱼之恋得以幸福圆满为结局。本剧以人鱼之恋为主线，其寓意人类世界和海底世界唇齿相依，人与自然是命运共同体，呼吁大家保护生物多样性，携手修复生态环境，在全社会营造积极参与生物多样性保护的氛围，呵护自然，倡导环保，共同守护我们的地球家园。9-7 Administrators: Administrators are special users. Write a class named Admin that inherits the User class you wrote to complete Exercise 9-3 or Exercise 9-5. Add an attribute named privileges to store a list of strings such as "can add post", "can delete post", "can ban user", and so on. Write a method called show_privileges () that displays the administrator's permissions. Create an Admin instance and call this method. ?呜呼，生平求一敌手而不可得，诚寂寥难堪也。