在有关重力的教学过程中,有这样的一个话题:我们脚下地球的另一端在哪里?是什么地方?对于这样的话题,曾经有两种说法,第一种说法是:在我们脚下地球的另一端是关于地轴对称的地方,也就是说,我们脚下地球的那一端是美国.第二种说法是:在我们脚下地球的另一端在过地心的连线上,关 In the process of teaching about gravity, there is such a topic: where is the other side of the earth under our feet? Where is it? For such a topic, there have been two kinds of arguments. The first kind of statement is: the other part of the earth under our feet. One end is about the axis of symmetry, that is to say, the end of the earth under our feet is the United States. The second way is: at the other end of the earth on the earth’s line, the