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!
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

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