[填空题]
Eclipses happen on Earth becaucag kc1c:g .iwp50c2nse of an a ae3l7ig(*hn)5xzyy cqg6l o 5mazing coincidence. Calculate, using the information insid q e5lag g5zicx)*6yynh7o3l( e the Front Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$