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One important ocean current moves warm water north and east from the Gulf Stream. As that current moves into higher latitudes, its water cools and finally sinks. This cold, highly oxygenated water is crucial in (i)_____________ the ocean's gaseous elements, rather than allowing them to become (ii) _____________, with oxygenated tops and oxygen-free bottoms.
- Blank(i)
- facilitating identification of
- maintaining a mix among
- slowing the movement of
- Blank(ii)
- stratified
- condensed
- dispersed
maintaining a mix among , stratified 显示答案
以上解析由 考满分老师提供。
