[填空题]
The Moon orbits the Em 2qyb6tcmkr+) ,kq i7arth such that the same oye45 csr:n,kside always faces the Earth. Determine the ratio of the Moon’s spin angular mome: on5rke,c s4yntum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$