[填空题]
Eclipses happen on Eap yl4bhib0a, 07+aob rrt,y.k0 *kf k)gndy8 ptsh because of an amazing coincidence. Calculate, using the information inside .yy) p,8*0 ktnskgkdf the Front Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$