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mbhound mbhound
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6 years ago
The usual maximal amount of oxygen extracted from the blood is
 
 a. 25 percent
  b. 50percent
  c. 85 percent
  d. 100 percent
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ztboyceztboyce
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6 years ago
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mbhound Author
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6 years ago
You make an excellent tutor!
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Correct Slight Smile TY
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