地球表面陆地分布中,南北对称,并呈倒三角形,为什么?南北美洲一南一北成对称分布,并且大陆轮廓都为北宽南窄的倒三角形,其原因是什么呢?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 08:05:02
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