Normal air is approximately ________ oxygen and ________ nitrogen.
A. 95%/5%
B. 21%/78%
C. 50%/50%
D. 1%/99%
Answer: B
Health Professions
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What might be included in typical preoperative instructions for a patient about to undergo an elective plastic surgical procedure?
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Dogs' personality traits are characteristics of the ____________________
Fill in the blank(s) with correct word
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