单项选择题
A.hepatic vein B.renal vein C.left common iliac vein D.right testicular vein E.hepatic portal vein
A.prostatic portion of urethra B.membranous part of urethra C.where it crosses superior aperture of lesser pelvis D.where it pierces into the unrinary bladder E.internal urethral orifice
A.deiaphragm B.superior portion of duodenum C.head of pancreas D.suprarenal gland E.pylorus