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| 1. |
Trimix is a breathing gas, consisting of three gases and is often used in deep commercial diving. These three gases are |
| A. | Hydrogen, oxygen and helium |
| B. | Carbon dioxide, nitrogen and oxygen |
| C. | Oxygen, helium and nitrogen |
| D. | Chlorine, argon and oxygen. |
| Answer» D. Chlorine, argon and oxygen. | |