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)
用户評論
【Sophia Su】評論
sediment [ˈsɛdəmənt] 沉澱, 殘渣manifesto[ˌmænɪˈfestoʊ] 宣言, 告示, 聲明
【buydondon】評論
cretaceous 【古生】白堊紀tertiary 【地】第三紀的