[填空题]
The Moon orbits the Earth such that the same side always d yk:ugx2 h*7afaces the Earth8 (kqeeqc/e0yy:40 jk9lnwyz . Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, l/(j0qkqy9nyw84:yec k0zee treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$