胰头癌与胆管癌在声像图上最主要的鉴别点是（）。
A.肿块呈低回声
B.胆管扩张
C.胰管扩张
D.胆囊肿大
参考答案：C
You are hurting me very greatly. I still may not forgive you, ____ you apologize.
A．even though
B．so that
C．in case
D．in order that
比较修配装配法和调整装配法的相同点与区别？
