NAVLE（北美执业兽医考题）Day 665

单选题，正确答案是100分，非正确答案为0分，Good Luck！

Q1:As you look closely at an abdominal radiograph from a large German Shepherd, you see many regularly-spaced alternating light and dark lines on the radiograph.What do these lines mean？在你仔细观察一只德国牧羊犬的腹腔X光片时，你看到了很多相互交错且间隔规律的黑白线条。这些线条代表什么？

A - The x-ray was shot with a grid under the dog 拍摄X光片时该犬的身下放了栅格

B - The kilovoltage was too high KV太高

C - The x-ray was shot through a Potter-Bucky diaphragm 拍摄X片时使用了Potter-Bucky隔板

D - This is a sign of static electricity 静电的标志

E - The focal-film distance was too long 焦点胶片之间的距离太远

NAVLE（北美执业兽医考题）Day 665

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