从多普勒频谱图上能了解到血流的参数是:①血流性质②时相③方向④速度A.①②B.③④C.①②③④D.①④

作者: rantiku 人气: - 评论: 0
问题 从多普勒频谱图上能了解到血流的参数是: ①血流性质 ②时相 ③方向 ④速度
选项 A.①② B.③④ C.①②③④ D.①④
答案 C
解析

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