NAVLE（北美执业兽医考题）Day 593

单选题，正确答案是100分，非正确答案为0分，Good Luck！

If you take an x-ray of a dog at 300 milliamperes for 1/20th of a second, how many millliampere-seconds is the exposure？

如果你为一只狗拍摄X光片的时候设置为300毫安每1/20秒，意味着曝光时间是多少mAs？