____________ is not a method to obtain natural surfactant

a. Amniotic fluid extraction
b. In vitro preparation
c. Human alveolar wash
d. Animal alveolar wash

ANS: B

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4/5 รท 1/5 = ________

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A traumatic intrusion is ____________

a. soft tissue injury b. electrical burn c. pushing a newly erupted tooth back into the socket d. none of the above

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