夜晚为什么天空会边黑`我当然知道是地球背向太阳`但是宇宙中恒星是NN多`为什么它们的光不会使我们变得没有夜晚呢?难道离得远会减弱光的能量吗?我就是不明白其他恒星的光也是每秒30

来源:学生作业帮助网 编辑:作业帮 时间:2024/12/03 01:25:25
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