经过十二指肠水平部后方的结构是（）。
A.胆总管
B.胰头
C.小肠袢
D.肠系膜上动、静脉
E.右输尿管、下腔静脉和腹主动脉
参考答案：B
I don't care about the salary offered by the company. What I need is a (an) post. [ ]
A. creating
B. awarding
C. challenging;
D. competing
下列哪项不是八纲的内容（）
A.阴阳
B.气血
C.表里
D.寒热
E.虚实
