69.下圖為上腹部超音波影像,箭號所指之低回音構造為何? (A)inferior vena cava (B)superior mesenteric artery (C)superior mesenteric vein (D)splenic vein
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69.下圖為上腹部超音波影像,箭號所指之低回音構造為何? (A)infe..-阿摩線上測驗