[填空题]
The Moon orbits the Earth d khs4mrw)vi6vb*l2u. 7 l.cq such thq)pa51n2vrjxtbz ;0 9e -vc4rp b:rgx at the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (92nezb r1r-gxvqr pa0j5b :4);cxtv pabout its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$