题目内容
频谱多普勒超声可直接测量的血流参数是 .（ ）
2021-10-14
A.阻力指薮(RI)
B.压力阶差(PG)
C.搏动指数(PI)
D.收缩/舒张期速度比CS/D)
E.收缩期峰值流速(V；)
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