问题详情

What is the professors purpose in telling the students about moving rocks？

A．To teach a lesson about the structure of solid matter

B．To share a recent advance in geology

C．To give an example of how ice can move rocks

D．To show how geologists need to combine information from several fields

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！