问题描述： 实例证明地球 球体 1个回答 分类：英语 2014-12-09 问题解答： 我来补答 if the earth is flat,then if u watch the sails on the beach,u would see the sail completely,but then in reality,u can only see the top of sail at a far distance,then the whole thing if the sail comes close 展开全文阅读
