[填空题]
The Moon orbits the 6(j b 8htr,pdq,qtxu *gch/ 6qd, fs6kEs85 mcdyw0tog01 dujv:xj .-t arth 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 particle8 jomdt0xwcu0 g1:dt-.ys5vj orbiting the Earth.) $\times10^{ -6}$