問題詳情
13. The ozone layer ______ all the animals and plants on earth from the direct UV radiation from the sun.
(A) escapes
(B) protects
(C) distinguishes
(D) dissuades
(A) escapes
(B) protects
(C) distinguishes
(D) dissuades
參考答案
答案：B
難度：適中0.697436
統計：A(9),B(136),C(21),D(8),E(0)
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