問題詳情

【題組】18.Where in the passage does the author mention a technology that aided in the understanding of double radio sources?
(A)Line 2
(B)Line 7
(C)Line 17
(D)Line 21

參考答案

答案：C
難度：非常簡單1
統計：A(0),B(0),C(2),D(0),E(0)