题目内容
彩色多普勒血流成像技术的取样框应如何 选择应用
2022-01-25
A.取样框要明显小于检测区
B.取样框要比检测区大一倍
C.取样框必须为检测区的两倍大
D.取样框应一半在检测区内，一半在检 测区外
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