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当前学科:LA物理师
题目:
单选题
使用组织填充物可用于修正病人的不规则表面,但是有一个比较严重的缺陷在于()
A
使用不方便
B
使用的效果很差
C
导致给与病人的剂量不足
D
产生了较大的电子污染
E
减小了高能光子线的皮肤保护作用
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