問題詳情

14. During which time did animal start to burrow into the sediment on the sea floor?
(A) Archean
(B)Proterozoic
(C) Cambrian
(D) Miocene
(E) Quaternary

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增