NAVLE（北美执业兽医考题）Day 416

单选题，正确答案是100分，非正确答案为0分，Good Luck！

What are the three most important factors to remember for radiation safety?

辐射安全需要记住的三个最重要的因素是什么？

Find out the answer by clicking on one of the listed choices. Good luck!

点击列出的选项找出答案，祝大家好运

A - Positioning, angle of tungsten target, temperature of filament 体位，投照中心角度，灯丝温度

B - kVp setting, focal-film distance, grid type 千伏设置，焦片距离，栅格类型

C - Time, distance, shielding 时间，距离，防护

D - Power, restraint, x-ray tube length 强度，保定，x线管长度

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