A. Deploypassengeroxygenmask B. Dononanoxygenmask C. Makeimmediatedescent
A. Gut B. Sinuses C. Middleear
A. 40seconds B. 3minutes C. 1minuteand15seconds
A. 25seconds B. 1minute C. 45seconds
A. 25seconds B. 15seconds C. 35seconds
A. 10,000ft B. 15,000ft C. 5,000ft
A. Immunesystem B. Respiratorysystem C. Nervoussystem
A. Hyperventilation B. Hypoxia CarbonMonoxide
A. alwayseasytoperceive. B. easytoovercome. C. ofinvisibility.
A. hypoxia B. decompressionsickness C. barometeorism高空胃肠胀气
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