問題詳情
【題組】4. According to the passage, mining engineers were the first to realize that
(A) various types of rock were scattered across Earth's surface
(B) rocks in different locations could be related by their age
(C) there were wide differences in the appearance of different types of rocks
(D) older rocks were better suited for industrial use
參考答案
答案：B
難度：適中0.5
統計：A(49),B(80),C(22),D(8),E(0)