[填空题]
The Moon orbits the g1;q9 sg/zl2ugib(c dEa p w2/a0yjz-u:if4q fmrth 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 case, i-:pwm0q/ auf2yf z4j treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$