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The First World War lasted for 4 years and 3 months from July 1914 to November 1918. The war swept across Europe, Asia and Africa, with 34 countries and regions participating in the war. The population affected by the war reached more than 1.5 billion, accounting for 75% of the world's population at that time. The two sides mobilized 889 divisions with a total of 74 million troops, 8.4 million killed and 21 million injured.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. ?　　为了拯救世界危机而出现的科学家华莱士(电影中由杰瑞德·莱托饰演)，开发了解决粮食困难的新生态系统，并开始着手研究新型复制。讲述了变成大人的瞬间的故事"In such information exchange meetings, some large banks have adopted a very open communication attitude and actively shared with others the security threats they have encountered and practical and effective solutions. In this way, large banks have at least opened up communication channels," commented RichBolstridge, chief strategic expert in the financial services department of Akamai Technology Company.