70.下列那一項無法提高超音波影像之解析度?
(A)減少空間脈衝長度(spatial pulse length)
(B)增加頻寬(bandwidth)
(C)提高品質因子(quality factor)
(D)縮窄波寬(beam width)
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統計: A(342), B(493), C(919), D(274), E(0) #2868138
統計: A(342), B(493), C(919), D(274), E(0) #2868138