[填空题]
Eclipses happen on Earth bo dq3fj8:,lcg ecause of an amazing coincid pxr/:a20uqssk la rv;t ;m6y4ence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the Suataqmy :k0prs u;v46 xr;2ls/n and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$