问题详情

Why does the professor mention the Moons mantle？

A．To explain how scientists are able to estimate the age of meteor impacts

B．To indicate what part of the Moon could provide key evidence about the Moon"s composition

C．To explain how scientists know that meteors penetrate the Moon"s crust

D．To point out an obvious difference between the Moon and Earth

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！