题目内容
腹主动脉多普勒血流频谱特点，不包括
2022-01-25
A.腹主动脉近端可出现三相波频谱
B.腹主动脉近端收缩期峰值速度高于腹主 动脉远端
C.腹主动脉发出的内脏动脉分支的血流呈 低阻型
D.肠系膜上动脉比腹腔动脉阻力略低
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