单项选择题

A.(右)门静脉(左)脾静脉
B.(右)肠系膜上静脉(左)脾静脉
C.(右)肠系膜上动脉(左)肠系膜上静脉
D.(右)腹腔动脉(左)门静脉
E.(右)肠系膜上静脉(左)肠系膜上动脉