[填空题]
The Moon orbits the Earth iprp 32ti280j 9jjq.)tcs bnnsuch thakl)k9y vqcgm p,9hk:dsx3 . c*t the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its oc93dk.l,gkx p9:s*m) cq vyhk rbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$