[填空题]
Eclipses happen on Earth becausez)w*knw 4u ai*ae3y:1b,gta8, x xziv of an amazing cogf(rr jgv,;d3u k*i6 lincidence. Calculate, using the information inside the Frodluk ,f 6;g3ri*(r vgjnt Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$