17.下列那兩條血管通常匯集至門靜脈?
(A)hepatic and superior mesenteric veins (B)superior mesenteric and splenic veins (C)splenic and renal veins (D)hepatic and splenic veins
21.若想要以雙重攝影方式觀察升結腸的息肉(polyp)時,下列那一種攝影擺位方式最適合? (A)left lateral decubitus position(AP position projection) (B)right lateral decubitus position(AP position projection) (C)LPO position (D)RPO position