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Command mode benefits; Separate objects that request an operation from objects that know how to perform an operation.他们的神仙说人话，我们的也要说What is monomer mode? Monomer schema is an object used to divide namespaces and organize a batch of attributes and methods together. If it can be instantiated, it can only be instantiated once.[News] On August 26, The World Wide Web reported that "Zimbabwe's President ordered the arrest of the delegation for failing to win a medal in the Olympics", According to reports from Taiwan's "Central News Agency" and Nigeria's media PM News website on August 25, President Mugabe was outraged by the Zimbabwean Olympic delegation's failure to win medals at the Rio Olympics. He ordered the country's police chief to arrest and detain the Zimbabwean Olympic delegation. The delegation was arrested as soon as it arrived at Harare International Airport on the 23rd. Netease, Phoenix, Dongfang, Yangguang and other websites reprinted one after another.Safe flight time is the most basic condition, and other assessment criteria include tactical theory, personal skills and physical fitness.Imagine a scene where there is an electric lamp with only one switch on it. When the light is on, press the switch at this time and the light will switch to the off state. Press the switch again and the light will be turned on again. The behavior of the same switch button is different in different states.