An overwhelming richness of vegetation may have caused the level of oxygen, to r

游客2023-12-27  17

问题 An overwhelming richness of vegetation may have caused the level of oxygen, to rise above today’s ______ , with a corresponding depletion of carbon dioxide.

选项 A、concentration
B、saturation
C、satiation
D、plenitude

答案 A

解析 名词辨析
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