英语练习1
题目内容

Scientists have __ for years that turbulence within the gaseous clouds foundthroughout the Milky Way stymies star formation, but some of the forces behindthis disturbance remain__.(  )。

2021-11-23

A.doubted …insufferable

B.posited …unknown

C.argued …relative

D.assumed …exoteric

E.conveyed …insuperable

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