28.試計算123I的比活度(specific activity)為多少Ci/g?(已知 123I之T1/2=13.2 hr)
(A)7.1×106
(B)1.9×1016
(C)7.1×1016
(D)1.9×106
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統計: A(35), B(103), C(164), D(1582), E(0) #1150267
統計: A(35), B(103), C(164), D(1582), E(0) #1150267