66.下列何種射源不會在劑量校正儀(dosecalibrator)的品管校正時使用?
(A)57Co
(B)99mTc
(C)137Cs
(D)131I
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統計: A(169), B(319), C(134), D(1398), E(0) #2407885
統計: A(169), B(319), C(134), D(1398), E(0) #2407885