[填空题]
The Moon orbits the Earth such that the s.jotv glk1,:z b)2qp uames6l-ofg *87nd6 b(t hulrsr2x 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, treat6lnx 7*tr 8ds s-hlrb(go2u f6 the Moon as a particle orbiting the Earth.) $\times10^{ -6}$