the Expo will bring new knowledge from a specific period of time and trend of development, reflecting the human civilization.
The main attractions of the first session of the World Expo in 1851 in the Crystal Palace in London: almost 500 meters long palace built of cast iron and glass. Subsequently, the participating countries will offer similar advantages to introduce from time to time every few years.
匿名回答于2024-05-13 08:31:00
