Question 1 of 15
Walking Character
6%
Princess Right

스쿠버 다이빙에서 일반적으로 사용되는 가스 혼합물은 무엇입니까?

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A 수소와 산소
B 산소와 이산화탄소
C 질소와 산소
D 산소와 헬륨
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