[填空题]
The Moon orbits the Earth suc z6ei a/8)d5)l whda(q;cf :uqb(zk vih that thop0u,a .l-l w3-ucrar e 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 orbiting the Eartha. r0,lp-cu3urw- ola .) $\times10^{ -6}$