[填空题]
The Moon orbits the Eart(xe-bc 6fl.f th such that the xv7 .h**r-zz s1crtddm5 o 8zfhw9:dtsame side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (abc*1hodm xrd s9 r*t-5wz:t78hv.z dfzout its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$