問題詳情
71.下列何者可作為蓋革計數器（GM counter）的標準校正核種？
(A)131I
(B)99mTc
(C)201Tl
(D)137Cs
(A)131I
(B)99mTc
(C)201Tl
(D)137Cs
參考答案
答案：D
難度：適中0.597222
統計：A(2),B(13),C(2),D(44),E(0)
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