下列哪位航海家首次实现了人类环绕地球一周的航行,证明地球是一

下列哪位航海家首次实现了人类环绕地球一周的航行,证明地球是一个球

体?(   

A、麦哲伦    B、郑和    C、哥伦布    D、马可波罗

答案

 A

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