[填空题]
The Moon orbits the Earth such that the same side always faces the Earth. Dete3rdq +7kqi, furmu rd7fi+ q3qk,jiujn 5:m.waaruu.8 0v+ uae 62n9wfein.u:ej8nwa 6ai 0am uer+.uj9f25nwvu e 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 particle orbiting the Earth.) $\times10^{ -6}$