問題詳情

37. What is the main idea of the passage?
(A)causes and impacts of particulates
(B)methods of improving air quality
(C)geographical areas affected by particulates
(D)composition analysis of particulates

參考答案

答案:A
難度:簡單0.8
統計:A(32),B(2),C(3),D(2),E(0)

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