阿摩線上測驗
7. According to the passage, pioneer geologists believed that to determine a rock's age, it was helpful to know
(A) how deep under the surface the rock was located
(B) how much power was needed to remove the rock
(C) how rough the rock's texture was
(D) how soft the rock was
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統計： A(61), B(20), C(54), D(92), E(0) #801530
統計： A(61), B(20), C(54), D(92), E(0) #801530
