72.192Ir(半化期74天)的比活度約為多Ci/g?
(A)9289
(B)8790
(C)7780
(D)457.9
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統計: A(1748), B(140), C(88), D(42), E(0) #2406472
統計: A(1748), B(140), C(88), D(42), E(0) #2406472