[填空题]
Eclipses happen on Eaf4m0 coy+4 tl9l.v9+ g0qjxiovsl cf-rth byrwd6xp ((8 gaaxyku us:-p3-ecause of an amazing coincidence. Calculate, using the information inside the Front Cover, the angular diwpa3r:uy(d(8a6y -g kusxp x- ameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$