18.下列何者通常不會出現在上縱隔腔(superior mediastinum)?
(A)胸腺(thymus)
(B)肺動脈幹(pulmonary trunk)
(C)上腔靜脈(superior vena cava)
(D)胸管(thoracic duct)
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統計: A(0), B(0), C(0), D(1), E(0) #3975897
統計: A(0), B(0), C(0), D(1), E(0) #3975897