试题与答案

氧合状况与放射敏感性的关系()。 A.氧合好的肿瘤细胞放射敏感性低 B.乏氧的肿瘤细

题型:单项选择题 A1/A2型题

题目:

氧合状况与放射敏感性的关系()。

A.氧合好的肿瘤细胞放射敏感性低

B.乏氧的肿瘤细胞放射敏感性高

C.乏氧的肿瘤细胞放射敏感性低

D.氧合状况与放射敏感性没有关系

E.以上说法都不对

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:前10min,阳极(银片)上发生氧化反应:Ag-e-===Ag+,银电极质量减轻,阴极(铂片)发生还原反应:Ag++e-===Ag,铂电极质量增加。当电源反接后,由于电流是原来的2倍,故先考虑前5min的情...

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