13.圖中箭頭所指結構是:
(A)肺動脈(pulmonary artery) (B)肺靜脈(pulmonary vein) (C)主動脈結(aortic knob) (D)左心房(left atrium)
13.圖中箭頭所指結構是: (A)肺動脈(pulmonary artery)..-阿摩線上測驗