[填空题]
The Moon orbits the Earth /gs3+o m vi,ai4pli +jsuch that the same side always faces the Earth. Djwt921+rqprw etermine the ratio of the Moon’s spin angulap2q1rw w rt9j+r momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$