氧气浓度在多少时人会出现头晕反应?水汽浓度到达多少时,人会头晕? 冬天,教室若长时间紧闭门窗,人会感到头晕,原因是教室内( ...
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正常人体只需要一定浓度的氧,氧的浓度过低或过高都对人有害。常压时,在氧浓度为14%-16%(相当於氧分压13.3-16kpa),会出现呼吸加深加快,脉博加快,血压升高,肢体肌肉协调动作变差。
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