题目内容
对门静脉的表述,以下正确的是^
2022-01-25
A.与肝动脉垂直
B.管壁显示不清
C.走行于肝段间
D.其频谱多普勒波形受呼吸影响很小
E.正常情况下,其血流在整个心动周期 持续存在
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