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In web development, Picture preloading is a common technique, If you set the src attribute directly to the img tag node, If the picture is larger, Or if the network speed is relatively slow, Before the picture is loaded, The picture will be a blank scene for a period of time. This is not good for the user experience, so at this time we can use a loading loading picture as a placeholder to prompt the user that the picture is being loaded before the picture is loaded. After the picture is loaded, we can directly assign a value to the picture. The following code is as follows when we do not use proxy mode to preload pictures:鹅妹嘤！沙雕番外它又回来了该喜剧以一个虚构的小镇坦布里为背景，讲述了托尼（瑞奇·热维斯饰）的故事。托尼是当地一家报社的作家，在妻子死于癌症后，他的生活发生了翻天覆地的变化。葫芦和板栗听了大怒，都道早知这样，先前就该一脚踹死他。本剧是一部刻画了没有手枪等武器的民间保镖活跃模样的作品，木村在上一部作品中饰演作为组织的一员守护客户的主人公岛崎章，而在此次的作品中，木村则将成为独立的私人BG，与敌视自身的组织进行对立竞争。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. ?Don't count. This reply is the standard 121 words.