[填空题]
Eclipses happen on Earth because of 0g6moqny 4id9 l;)fibx*uh4pan am+ )yu dbep0z4yazing coincidence. Calculate, using the information inside the Front Cover, the angu0+y )u ezydp4blar diameters (in radians) of the Sun and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$
Post time 2025-2-18 20:00:22
