【科学60秒】X光——透射生活的美好_英语听力练习mp3下载-科学-沪江听力酷

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【科学60秒】X光——透射生活的美好

听力简介：

X-rays are so common today you probably never stop to think about them. They help check a broken wrist, a sprained ankle, the state of our teeth. But a little more than a century ago, x-ray machines provided a revolution in medicine, allowing doctors to look inside the body. And now scientists in the Netherlands have gotten a chance to look at how the original technology____1____.

A first-generation anatomical imaging x-ray machine was built in Holland in early 1896. Advances to the technology came quickly, and that first machine ____2____ an old warehouse. Then a year ago, a Dutch radiologist got his hands on the machine and dusted it ____3____. He and colleagues tested it using a cadaver hand. They published their research in the journal Radiology.

They found that an x-ray image that requires just 21 milliseconds today would have taken 90 minutes in 1896. And the radiation exposure would have been 1,500 times greater than modern technology’s. Early x-ray operators and researchers thus often suffered burns and other maladies. The scientists wrote that the images they produced with the ancient machine were____4____—but still____5____.
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