[填空题]
The Moon orbits the Eart4st8x adq (v;)lj t9yhh such thatmfr v (oqr,,vq8apg1:g+jp 2 x 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 particle orbit 8xrm pp12vor(q aqgj g+,:vf,ing the Earth.) $\times10^{ -6}$