[填空题]
Eclipses happen on Earth ba9abve ):)mp61pm h8fat a 5ssecause/5 5yr:uu,poej,e 0ifh4 znsk of an amazing coincidence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the Su5uju nieofs4k0: h5 eyz/,p,r n and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$