[填空题]
The Moon orbits the Edq 791b:isti; 1k kenyarth such that the s-qy8t;lv fmr)n mfl0* ame side always faces the Earth. Determine the ra0)* y ;tmf8 frv-mnllqtio 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 Earth.) $\times10^{ -6}$