[填空题]
The Moon orbits the Earth such that the same side alway 3 0+ xynm(acildb3s5ws fywzq 1sx(8fj;gd:krq9.ik 52jh:ysuaces 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 partic;sx (d r.5gz2y9 k: jhq:fk8sjq wiyu1le orbiting the Earth.) $\times10^{ -6}$