問題詳情
【題組】52 Deep caves are formed in limestone as a result of
(A) exposure to the air.
(B) particularly acidic water.
(C) splitting and tilting of the rock.
(D) geological movements below the crust of the earth.
參考答案
答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)