76.下列何者最差?
(A)pinhole collimator
(B)converging collimator
(C)high resolution parallel hole collimator
(D)general purpose parallel hole collimator
答案:登入後查看
統計: A(143), B(49), C(24), D(122), E(0) #3492144
統計: A(143), B(49), C(24), D(122), E(0) #3492144