这道题有三分之一的菌丝选择了D。勾股弦的“弦”,指的是直角三角形的斜边,和上弦月的关系有点远~ 大概选D的是觉得上弦月🌓的形状就是个D?
- 转发 @EasyNight : 听说月船3号昨晚登月了,那么今天来做一道和月相关的题。“上弦月”的“弦”是什么意思?(嗯我就不问“月”是什么意思) #每日天文一题
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