[填空题]
The Moon orbits the Earth su o z0jb)adnf.n2fa6-: v ru+t2e 3f uptpwhr+;ch that the same side always fu m ma8:jctgt 5qr:vr1vw+ .z+aces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital ag5+vt+ w8ctr.v z m1 jq:mra:ungular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$