Wheninflight,apilotsuddenlybecomesratherexcitedandpleased,whilehisoperationandjudgmentcapabilitiesdecrease,inthiscase,thepilotmay（）
A. beinhypoxiastate.
B. sufferhyperventilation.
C. betooexcitedbecauseofhappythings.
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Ahyperventilationprogressesapilotcanexperience（）
A. Heightenedawarenessandfeelingofwell-being.
B. Decreasedbreathingrateanddepth.
C. Symptomsofsuffocationanddrowsiness.
Whichisacommonsymptomofhyperventilation?（）
A. Drowsiness.
B. Decreasedbreathingrate.
C. Euphoriasenseofwell-being.
Whichwouldmostlikelyresultinhyperventilation?（）
A. Insufficientcarbondioxide.
B. Insufficientoxygen.
C. Excessivecarbonmonoxide.
Hypoxiaistheresultofwhichoftheseconditions?（）
A. Excessiveoxygeninthebloodstream.
B. Insufficientoxygenreachingthebrain.
C. Excessivecarbondioxideinthebloodstream.
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