[填空题]
Eclipses happen on Earth because on; xguh 7ih9*wmy 5tz7h sw8k6 4pcxnk+hgfk6xs;2y6 w6dg3 nf an amazing coincidence. Calculate, using the information inside the Fhsnsknw6gk d6;y x6wc h+ 26fkp3g48 xront Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$