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niaaasimmm niaaasimmm
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6 years ago
What do the white blood cells do?
 
  A)
 
  fight infection
  B)
 
  secrete hormones
  C)
 
  carry oxygen
  D)
 
  all of the above
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Pgerety47Pgerety47
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6 years ago
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niaaasimmm Author
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6 years ago
This site is awesome
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Yesterday
Good timing, thanks!
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2 hours ago
This helped my grade so much Perfect
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