[填空题]
The Moon orbits the Ea)gx.)nvax4we rth such that the same sidumfu7-cbvo8e ( : p7cxgdz- l9e always faces the Earth. Determine the ratio of the Moon’s spze-cgx bl8p -vd797cmf( uu o:in angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$