[填空题]
Eclipses happen on Earth be,ap ycjl0u8l2; 2z timi+m af.s8 jc+dcause of an ama.,am9gyrh8lep s8,qs zing coincidence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the Sun andar9mq sl.ygsh p8,,8e the Moon, as seen on Earth.
Sun = $rad$ Moon = $rad$