42.磁振造影中,若梯度大小(gradient amplitude)為1 G/cm,上升時間(rise time)為0.2 s,則扭轉速率(slew rate)為多少mT/(m . s) ?
(A)0.2
(B)2
(C)5
(D)50
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統計: A(85), B(135), C(318), D(1524), E(0) #2407861
統計: A(85), B(135), C(318), D(1524), E(0) #2407861