32.脈衝式超音波(pulsed ultrasound),其責任因子(duty factor, DF)為5%、脈衝重複周期 (pulse repetition period, PRP)為6.5 μs,則空間脈衝長度(spatial pulse length, SPL) 為多少毫米(mm)?
(A)0.5
(B)1.5
(C)2.5
(D)3.5
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統計: A(121), B(89), C(62), D(49), E(0) #3492180
統計: A(121), B(89), C(62), D(49), E(0) #3492180