[填空题]
Eclipses happen on Earth becaus ou4kb(yhg-l zp,j8q6e ow; 4 ltd9xt ;d qiusv,qj)6p7d r,n7kgf an amazing coincidence. Calculate, using the information inside the Front Cover, the angular diametx6pgs;7,wk vi q 74d,9dnqr ;td ltj)uers (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$
Post time 2025-2-18 20:00:22
