胰腺的后方紧邻的结构是（）
A.脾静脉
B.腹主动脉
C.下腔静脉
D.十二指肠横部
E.胆总管
参考答案：A
It is fairly ________ in Africa for there being a group of expert musicians ________ by others who also
join in the performances.[ ]
A. regular；surrounding
B. common；surrounded
C. ordinary；surrounding
D. usual；surround
干扰在氢氧化钠碱性溶液中，加入紫脲酸铵指示液，用EDTA＿2Na滴定液(0．05mol/L)滴定硫酸钙（）
A．软膏剂
B．颗粒剂
C．胶囊剂
D．注射剂
E．药物制剂
