[填空题]
The Moon orbits the hz f2 jjof7)j7p+tsv::wqaf1 4v p 6zc5uocq:Earth such that the same 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 c6ovuq5 cz 4p:particle orbiting the Earth.) $\times10^{ -6}$