45.胚胎發育期間,上唇是由下列那兩者形成?
(A)內側鼻腫(medial nasal swelling)及外側鼻腫(lateral nasal swelling)
(B)外側鼻腫(lateral nasal swelling)及上顎腫(maxillary swelling)
(C)內側鼻腫(medial nasal swelling)及上顎腫(maxillary swelling)
(D)上顎腫(maxillary swelling)及下顎腫(mandibular swelling)

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統計: A(33), B(61), C(172), D(0), E(0) #1034211

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