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
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)
用户評論
【Xin】評論
escape逃脫 protect保護 distinguish分辨 dissuade勸阻