单项选择题
A.2~4mm B.3~5mm C.5~7mm D.7~11mm E.8~12mm
A.6cm B.8cm C.10cm D.12cm E.14cm
A.胰头肿块 B.转移性病 C.肿大之肝脏 D.粘连性肿块 E.肿大的胆囊