NAVLE（北美执业兽医考题）Day 727

单选题，正确答案是100分，非正确答案为0分，Good Luck！

What is the effect of a high-ratio grid on an x-ray exposure?
高栅格比再X光片的曝光上起什么作用？

A - More x-rays pass through to the animal 更多X射线穿过动物

B - Less mAs needed 需要的mAs更低

C - Fewer X-rays reach the film 达到胶片上的X射线更少

D - Darker x-rays X光片更暗

E - Loss of film resolution 胶片分辨率降低

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