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  3. The same benefits and drawbacks are found when using CT scanning to detect lung cancer — the three-dimensional imaging, improve

The same benefits and drawbacks are found when using CT scanning to detect lung cancer — the three-dimensional imaging, improve

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问题     The same benefits and drawbacks are found when using CT scanning to detect lung cancer — the three-dimensional imaging, improve detection of disease but creates hundreds of images that increase a radiologist’s workload, which,【C1】________ , can result in missed positive scans.
    Researchers at University of Chicago Pritizker School of Medicine presented【C2】________ data on a CAD (computer-aided diagnosis) program they’ve designed that helps radiologist spot lung cancer【C3】________ CT scanning. Their study was【C4】________ by the NIH and the university.
    In the study, CAD was applied to 32 low-dose CT scanning with a total of 50 lung nodules, 38 of which were biopsy-confirmed lung cancer that were not found during initial clinical exam.【C5】________ the 38 missed cancers, 15 were the result of interpretation error (identifying an image but【C6】________ it as non cancerous) and 23【C7】________ observational error ( not identifying the cancerous image).
    CAD found 32 of the 38 previously missed cancers (84% sensitivity), with false-positive【C8】________ of 1.6 per section.
    Although CAD improved detection of lung cancer, it won’t replace radiologists, said Sgmuel G. Armato, PhD, lead author of the study. "The computer is not perfect," Armato said. "It will miss some cancers and call some things cancer that【C9】________ . The radiologists can identify normal anatomy that the computer may【C10】________ something suspicious. It’s a spell-checker of sorts, or a second opinion.
【C9】
选项 A、don’t
B、won’t
C、aren’t
D、wasn’t
答案C
解析 本题考查句子结构。这里是个省略句，完整的表达应该是：“It will miss some cancers and call some things cancer that are not cancers．”因此本题正确答案为C。
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