問題詳情
二、填充題（20 分，每格 2 分）1. 3 個半值層(HVL)加上兩個什一值層(TVL)之屏蔽，可使原來之輻射強度降至原來的 __ 。
參考答案
答案：D
難度：適中0.509314
統計：A(80),B(250),C(543),D(1367),E(0) #
個人：尚未作答書單：社會化與教育
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