郑和是我国历史上一位十分杰出的外交家。15世纪初,郑和七次下西洋,是人类征服海洋的空前壮举,在世界航海史上留下了光辉的篇章,也为中国和亚非各国的友好关系史作出了巨大的贡献。接下来,我们将用6节课的内容,为你介绍郑和七次下西洋的过程及其影响。
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