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脉冲式多普勒的技术优势在于()

单选题
2021-12-28 02:57
A、可测定高速血流
B、可测定低速血流
C、有距离选通作用
D、连续发射脉冲波
E、主要用于反流的检测
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正确答案
C

试题解析

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