問題詳情

47 What can we infer about the missing craters? 
(A)They never left any impact on Earth. 
(B)They  have not been completely eroded. 
(C)They were far more than the surviving ones. 
(D)They  were hit by more than one asteroid.

參考答案

答案:C
難度:困難0.349206
統計:A(7),B(31),C(44),D(42),E(0)

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