[填空题]
Eclipses happen on Earth becauy yjax8wexx 19v o1c(1y04vkt se of an amazing cosq3pt-,0 xn. dwn6cjfil /ig.incidence. Calculate, using the information inside the Front Cover, the angular diameters j..t/n ci-gxqp ,fds03wlin6 (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$