18.直線加速器在產生光子射束時,不使用下列何種組件?
(A)靶(target)
(B)散射箔片(scattering foil)
(C)整平濾片(flattening filter)
(D)游離腔(ion chamber)
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統計: A(15), B(1499), C(123), D(33), E(0) #1041506
統計: A(15), B(1499), C(123), D(33), E(0) #1041506