下列腧穴中不是郄穴的是
A．阴郄B．郄门C．梁丘D．外丘E．委中
参考答案：E
化脓性梗阻性胆管炎常见的病因是（）。
A.括约肌痉挛
B.胆管结石
C.T管造影术后
D.胆管狭窄
E.胆管蛔虫
_____ they look different, they have some similarities.[ ]
A. But
B. As
C. Although
D. When
