[填空题]
Eclipses happen on Earth because of an amazing ft1 6kdjfb,go3ytsqets) o0(2n : /hzcoincidence. Calculate,szg:8, zyskx- using the information inside the Front Cover, th szsg8z:y,k -xe angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$