阿摩線上測驗
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
答案：登入後查看
統計： A(79), B(131), C(40), D(10), E(0) #801527
統計： A(79), B(131), C(40), D(10), E(0) #801527
