Oxygen First Aid Quiz

Question 1 of 12
The atmospheric air we inhale contains ____ % oxygen.


A. 12

B. 16

C. 21

D. 27

ADVERTISING OPPORTUNITIES |PRIVACY POLICY |RSS FEED |DAN MEMBERSHIP |CONTACT USAlert Diver - Quad/Graphics
©2018 DAN HOLDINGS, INC.
Language: SpanishPortuguese
HOMEFeaturesDAN MissionDive SlateImagingEncountersLocal DivingWater PlanetDive Medical CentersGearQUIZZES