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1. |
What is the ratio of the gases in medical air? |
A. | 78% Nitrogen, 21 % oxygen |
B. | 75 % Oxygen, 25 % Carbon dioxide |
C. | 60% Nitrogen, 20% Oxygen, 20% Carbon Di oxide |
D. | 50% Nitrogen, 50% Oxygen |
Answer» B. 75 % Oxygen, 25 % Carbon dioxide | |