[填空题]
The Moon orbits the Earmow .1pe*cbo:p8opqg.5y) p hth such that the same side always faces the Earthavg 0f/j10ly .vgb(5l x/sscl. Determine the ratio of the Moon’s spin angular momentum (about its own av.05ss 0l/x/vg gj1 l ylcba(fxis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$