76.X光管套之漏射線(leakage radiation)在1公尺處應低於多少mR/hr?
(A)1
(B)10
(C)100
(D)5
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統計: A(71), B(90), C(125), D(64), E(0) #3492064
統計: A(71), B(90), C(125), D(64), E(0) #3492064