[填空题]
Eclipses happen on Earth be;m:t)4;g,d xif1 l ntl7kmy9up8qt etcause of an amazing coinou hska8t *hajb6i 96(cidence. Calculate, using the informati*(6bs9ih ukjtaao8h6on inside the Front Cover, the angular diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$