[填空题]
Eclipses happen on Ear *+o6 fk,;vqkdd)mrw bth because of an amazing coinc xcs5i t89rdt8idence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the Suttd 8 9xirs8c5n and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$