论文部分内容阅读
第三讲地理实验 1.实验目的(l)观察地球的自转方向;(2)观察地球钱夜变化现象及其周期(太阳日);
Lecture 3: Geographical Experiments 1. Purpose of the experiment (l) Observing the direction of the rotation of the earth; (2) Observing the phenomenon of changes in the night of the money and its cycle (solar day);