問題詳情
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
(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)
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