[填空题]
Eclipses happen on Earth because of an amazing coix5lbom b(m jcnj 2txmz7-9,0tncidence. Calculate, usxm+ 9jen8pn( ping the information inside the Front Cover, the angular diamx8p+ 9npn j(emeters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$