Hypoxiasusceptibilityduetoinhalationofcarbonmonoxideincreasesas（）
Altitudeincreases.
B. Oxygendemandincreases.
C. Humiditydecreases.
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Inphysiology,twophasesofbreathmeans（）
A. Theairexchangetakingplaceinlungandtheairexchangebetweenthebloodandthetissue
B. Theinhalingofoxygenandtheexhalingofcarbondioxide.
C. Thatthepilotshouldmaketwodeepbreatheswhenunderstrain.
ThephenomenonofhypoxiacausedbypositiveGdominoeffectmaybecalled（）
Accelerationhypoxia
B. Anemichypoxia
Circulatingstagnationhypoxia
Whentheexhaustgasofcabinleadstoanemichypoxia,thenecessarymeasuresshouldbe（）
A. Deepbreathingimmediatelyandexercisingtheirhandsandfeet
B. Openingthefreshairinletandofferingoxygenintime
C. Speakingloudlytopreventconsciousnessfromdisappearing
Ifoxygenequipmentisnotused,thelimenaltitude（阈限高度）inducinghypoxichypoxiaformostpeopleis（）
A. 15000feet
B. 1000feet
C. 10000feet
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