Answers

2014-06-18T21:44:02+08:00
The amounts of respiratory gases vary in inspired alveolar,and expired air. Inspired air contains about 21 percent oxygen and 0.04 percent of carbon dioxide.
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2014-06-19T03:41:23+08:00
the amounts of respiratory gases vary in inspired alveolar,and expired air. Inspired air contains about 21 percent oxygen and 0.04 percent of carbon dioxide.
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