[填空题]
The Moon orbits the Earth s2v (y9bj aj3c5 l 9h7ulz2xlgsuch that the sam6 .pob2 z5dnbue side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiu dbo56b np2z.ting the Earth.) $\times10^{ -6}$