試卷：無年度 - 97年1月TOFEL閱讀 (Page 161-163)#20921
| 科目：TOEFL(Test of English as a Foreign Language)托福
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試卷名稱：無年度 - 97年1月TOFEL閱讀 (Page 161-163)#20921
科目：TOEFL(Test of English as a Foreign Language)托福
19. The paragraph following the passage most likely discusses
(A) specific double radio sources
(B) an explanation of the synchrotron process
(C) possible reasons for the presence of cosmic jets
(D) the discovery of the first double radio sources.
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