[单选题]
The acceleration of gra2f4*( bp yozr;hps g16muua e0vity on the Moon is one-sixth whoz1co n3r zv(a v-,+mhat it is on Earth. The radius of the Moon is one-fourth that of the Earth. What is the Moon's mass compared 1m,+ov-3czzavh ro n( to the Earth's?
