盘点:历届世博会科技亮点

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历届世界博览会,均是展现人类在社会、经济、文化和科技领域取得成就的国际性大型展示会。让我们回眸一下历届世博会,看看有哪些科技成果在世博上涌现,并从世博会上走向世界,并改变了人们的生活,有的至今仍在发挥作用。
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