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

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統計： A(59), B(10), C(7), D(11), E(0) #817357

詳解 (共 2 筆)

#1118756
cretaceous 【古生】白堊紀
tertiary 【地】第三紀的
 
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#1071225
sediment [ˈsɛdəmənt] 沉澱, 殘渣
manifesto  [ˌmænɪˈfestoʊ]   宣言, 告示, 聲明
manacle [ˈmænəkəl]  手銬
insurgency[ɪnˈsɜ:rdʒənsi]  暴動, 叛亂
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