[填空题]
The Moon orbits the au*x6c3ny ob2vp h h 7vp r6lhw7.fb5:Edzc,o ch:03x kk+ f8z:lmbrk7.jm y;v arth such that the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter cazc:jkz:+cxf;7 dv,r lh .8ymob30kkm se, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$