25.已知活度為20 mCi 之99mTc(T1/2=6 hr),試問99mTc的個數為何?
(A)2.3×1013
(B)2.3×1014
(C)2.3×1015
(D)2.3×1016
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統計: A(784), B(85), C(109), D(32), E(0) #979063
統計: A(784), B(85), C(109), D(32), E(0) #979063