問題詳情

9. As the shore line of the Gulf slowly receded southward and westward, the ____ at itsbottom gradually came to the surface, and constituted the Cretaceous and Tertiaryformations.
(A) sediment
(B) manifesto
(C) manacle
(D) insurgency

參考答案

答案:A
難度:適中0.530303
統計:A(35),B(7),C(6),D(8),E(0)

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