68.下列何種偵測器是用來測量放射性活度?
(A)survey meter
(B)G-M counter
(C)dose calibrator
(D)gamma counter
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統計: A(75), B(160), C(1482), D(131), E(0) #2867226
統計: A(75), B(160), C(1482), D(131), E(0) #2867226
