Scientists have ______ for years that turbulence within the gaseous clouds found

游客2024-01-11  22

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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