2018年USAAAO短问题第7道
来自astro-init
Jingsong Guo(讨论 | 贡献)2020年3月9日 (一) 18:18的版本 (创建页面,内容为“==英文题目== [5 pt] On March 21st at true noon, length of the shadow of a vertical rod was equal to its height. On which geographic latitude did this happen?”)
英文题目
[5 pt] On March 21st at true noon, length of the shadow of a vertical rod was equal to its height. On which geographic latitude did this happen?