[填空题]
The Moon orbits the Earth such that s47xlse)sju2wuz p;a2qc 3 bw9hwa( .the . ogy;.sm ibuvz; z711wm)defsame side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orzom7u;y 1s ;.ed1g v.)zmbwif bital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$