[单选题]
The acceleration of gravi7x3xl) ks *e l/ji1dxoty on the Moon is oflx/f76n8mz5zicrqy4 yp (-pne-sixth what it is on Earth. The radius of the Moon is one-fourth that of the Earth. What is the Moon's mass compared to the r- 8/ 7np(py zxcly6iffqzm45Earth's?