Hypoxiaistheresultofwhichoftheseconditions?（）
A. Insufficientoxygenreachingthebrain.
B. Excessivecarbondioxideinthebloodstream.
C. Limitedoxygenreachingtheheartmuscles.
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Hypoxiaisalwaysaccompaniedby（）
A. dizziness
B. adegradationintheperformanceofapilot
C. vomiting
Hypoxiamaybecausedby（）
A. flyingwithaheadcold
B. breathingtooquicklyand/ortoodeeplyfortherequirementsofthebody
C. flyingatanaltitudewherethepartialpressureofoxygenistoolow
Ifapilotsuspectsthathe/sheissufferingtheeffectsofhypoxia,themostappropriateremedywouldbe（）
A. usesupplementoxygenordescendimmediatelytoalowlevel
B. voluntarilyincreasethedepthofbreathingtoinducemoreoxygenintothelungs
C. voluntarilyincreasethebreathingratetoincreasetheoxygenuptake
Whichofthefollowingstatementscorrectlydescribesthealleviationoftheeffectsofhypoxiaatcabinaltitudesabout10,000ftwithouttheuseofsupplementaloxygen?（）
A. rapidshallowbreathing
B. theeffectscannotbealleviated
C. slowdeepbreathing
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