氧气浓度；
反应混合气体中氧气含量大大过量，反应对氧气浓度的影响可以忽略。
In excess oxygen , the reaction was first order in hydrogen and zero order in oxygen.
用折射仪测量一下氧气的浓度。
让病患坐立，并用非再吸入面罩给予高浓度氧气。
A. sitting the patient up; giving high-concentration oxygen by non-rebreather mask.
让病患坐立，并用非再吸入面罩给予高浓度氧气。
A. sitting the patient up; giving high-concentration oxygen by non-rebreather mask.
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