[填空题]
Eclipses happen on Eartu: 0rp r *i 2ahr:tdh-9l0v-vxhev5ashi3uqs0, 4vh0at;brjuy ol2u ) because of an amazing coincidence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the Sun and the Moon, as seen obhryul o204jva)siuut0;3 , q n Earth. Sun = $rad$ Moon = $rad$