[填空题]
Eclipses happen on Earth becak3fonudi*.,jg c 5hlb7e zj / ln(z..fuse of :t/f r20p arw*mcn,ev an amazing coincidence. Calculate, using the information insiwa:ve0p,tc*n / 2frrm de the Front Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$