[填空题]
The Moon orbits the Earth such that the : kehm4h3+vt jsame side always faces th+ y qj- jq4/agu jc.xb)o7)* cny.xzqve Earth. Determine the ratio of the Moon’s spin angular momentum (aq ugy*xj. znyc4b 7q/)jo jcvx-q) .+about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$