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Paolaemy Paolaemy
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6 years ago
Phonation occurs when
 
  a) Vocal folds vibrate in the presence of air flow
  b) Vocal folds release mucous
  c) The larynx opens and closes
  d) The vocal folds vibrate in a vacuum created in the larynx
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CologicoonCologicoon
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6 years ago
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Paolaemy Author
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6 years ago
This helped my grade so much Perfect
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this is exactly what I needed
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2 hours ago
Helped a lot
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