2. 外语
  3. Scientists have ______ for years that turbulence within the gaseous clouds found throughout the Milky Way stymies star formation

Scientists have ______ for years that turbulence within the gaseous clouds found throughout the Milky Way stymies star formation

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问题 Scientists have ______ for years that turbulence within the gaseous clouds found throughout the Milky Way stymies star formation, but some of the forces behind this disturbance remain ______ .
选项 A、doubted... insufferable
B、posited... unknown
C、argued... relative
D、assumed... exoteric
E、conveyed ... insuperable
答案B
解析
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