胰腺癌与胆总管结石的主要鉴别点是（）
A.腹痛的程度
B.肝功能改变
C.淀粉酶改变
D.胆囊肿大
E.进行性加重的黄疸
参考答案：E
One winter day ____, he saw the tracks of animals in the snow and observed that the appearance of each one was different.
A．while he hunting
B．while hunting
C．while he hunt
D．while hunted
十二指肠球部溃疡的治疗最主要的是
A．抑制胃酸分泌B．保护胃黏膜C．早期手术D．减少胆汁反流E．根除幽门螺杆菌(Hp)
