62.下列何組射源之exposure rate constant相似(相差 2.0 Rcm2/mCi-h 以內)?①60Co ②226Ra ③125I
④103Pd
(A)①②
(B)③④
(C)①③
(D)②④
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統計: A(347), B(1950), C(130), D(119), E(0) #2039499
統計: A(347), B(1950), C(130), D(119), E(0) #2039499