𝐿𝑜𝓈𝓉𝑀𝑜𝓊𝓃𝓉𝒶𝒾𝓃
2020-03-17T11:54:53+00:00
纯学术讨论,前提是这个人视力好到能看到无限远,而且站的足够高,比如在珠穆朗玛峰顶上。那么他往前看的时候是第一种情形还是第二种情形?
[img]https://img.nga.178.com/attachments/mon_202003/19/-7Q5-jnj1XlZ5uT3cS240-2tc.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202003/19/-7Q5-jnj1XlZ5uT3cS240-2tc.jpg.medium.jpg[/img]