[填空题]
The Moon orbits the Earth such that the same side always faces the 9p cj r.ffv,p+Eart0x1 :ml;/kzywcy+5hkux xe0x.( hohkh. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat txl+/x1kkh zyok5euh;ym ( c. h0wxx0 :he Moon as a particle orbiting the Earth.) $\times10^{ -6}$