Not long ago the Sahara had a different climate. What evidence does the professor mention

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Not long ago, the Sahara had a different climate. What evidence does the professor mention to support this? Choose 3 answers.

A.Ancient pollen

B.Bones from large animals

C.Rock paintings

D.Agriculture in ancient Egypt

E.Underground water

此题为多项选择题。请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗