A假如你沿着赤道绕地球走一圈（理想化的要求是人体的轴线总是通过地球球心的），这时，你的头比你的脚多移动了多远？B假定把一根铁丝捆在地球的赤道上，然后将这根铁丝增长一米，使这根铁丝仍围成圆形，并与赤道之间的距离各处都是均匀的，那么，铁丝与地球之间能不能让一只 A. If you walk around the Earth along the equator (ideal requirement is that the axis of the human body always passes through the center of the earth), how far does your head move more than your feet? B supposes that a wire is bound to the earth’s equator, and then this iron wire is increased by one meter so that the wire is still round and its distance from the equator is uniform throughout. Then, the wire is Can we allow one between the earth?