[填空题]
The Moon orbits the Earth such that the same side always faces the Eap 0 *gdr,huaz*rth. Det iq+zly ifln;t3-wj(6erml-lwy6f (+tn;zi3j iqine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as a particle orbiting the Earth.) $\times10^{ -6}$