[填空题]
The Moon orbits the Eart vbs p.:b, vva5rb+3o hv,ve7)ngsx7hh such that the same side alw8fw: p tbbdqo+b(*b5yays faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momebow8:dpyb b+ b(f5* tqntum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$