主要供应胰腺颈体部()
A.胰十二指肠上动脉
B.胰十二指肠下动脉
C.胰背动脉
D.胰大动脉
E.胰横动脉
参考答案:C
He was disappointed to find his suggestions ____.
A.been turned down
B.turned down
C.to be turned down
D.to turn down
判断空肠起点的主要依据是
A.有小肠系膜
B.十二指肠悬肌
C.空肠粗而厚
D.有孤立淋巴结
E.在回肠的上端