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Home Q & A Board Humanities History Anthropology
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hellink hellink
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6 years ago
When exposed to sunlight, human skin manufactures:
 
  a. calcium.
  b. vitamin D.
  c. iron.
  d. potasium.
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pass25pass25
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hellink Author
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6 years ago
this is exactly what I needed
Zacellison
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Yesterday
This helped my grade so much Perfect
Shuqin
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2 hours ago
Just got PERFECT on my quiz
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