[填空题]
The Moon orbits the Earth dw,eh;9wu6rwv n4f9b such(czjgyv3 g )9w)luuau 8 n2pnx18lw.b that the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum ())1c8x28un wv(jybu 3w plnz agg.9lu about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$