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

游客2023-12-27  27

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A.concentration集中,浓缩,浓度;B.saturation饱和,饱和度;C.satiation饱食,饱满,厌腻;D.plenitude充分;因此A为答案。
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