阿摩線上測驗
37. During which epoch did thick ice sheets cover large parts of the northern hemisphere?
(A) Pliocene
(B) Oligocene
(C) Miocene
(D) Pleistocene
(E) Eocene
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統計： A(0), B(0), C(0), D(1), E(0) #3049954
統計： A(0), B(0), C(0), D(1), E(0) #3049954
