問題詳情

四、閱讀測驗（31~50 題）  Questions 31~33    Ice ages, those periods when ice covered extensive areas of the Earth, are known to haveoccurred at least six times. Past ice ages can be recognized from rock strata that show evidence offoreign materials deposited by moving walls of ice or melting glaciers. Ice ages can also berecognized from land formations that have been produced from moving walls of ice, such asU-shaped valleys, sculptured landscapes, and polished rock faces.
31. According to the passage, what happens during an ice age？
(A) Rock strata are recognized by geologists.
(B) Evidence of foreign materials is not found.
(C) Ice covers a large portion of the Earth’s surface.
(D) Ice melts six times.

參考答案

答案：C
難度：適中0.666667
統計：A(0),B(1),C(14),D(4),E(0)

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