NAVLE（北美执业兽医考题）Day 438

单选题，正确答案是100分，非正确答案为0分，Good Luck！

Which choice controls the penetrating ability of an x-ray?

X射线的穿透性由什么控制？

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 - Low-energy transformer 低能耗变压器

B - Milliampere-seconds 毫安秒

C - Cassette screen 片盒

D – Kilovoltage 千伏

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