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  3. Elderly joggers were half as likely to die prematurely from conditions like

Elderly joggers were half as likely to die prematurely from conditions like

游客2023-06-23  20
问题     Elderly joggers were half as likely to die prematurely from conditions like cancer than non-runners. Theyalso enjoyed a healthier life with fewer disabilities, according to the【B1】______ made by the StanfordUniversity Medical Center team. Experts said those discoveries in Archives of Internal Medicine【B2】______ the importance that older people exercise regularly. The work tracked 500 older runners for more than 20years, comparing them to a【B3】______group of non-runners. All were in their 50s at the start of the study.Nineteen years into the study, 34% of the non-runners had【B4】______ compared to only 15% of therunners. Both groups became more【B5】______with age, but for the runners, the onset of disability startedlater—an average of 16 years later. The health gap between the runners and non-runners continued to【B6】______even as the subjects entered their ninth decade of life. Running not only appeared to slow therate of heart and artery(动脉)related deaths, but also it【B7】______ fewer early deaths from cancer,neurological disease,【B8】______and other causes. And there was no evidence that runners were more likelyto suffer osteoarthritis(骨关节炎)or need total knee【B9】______ than non-runners—something scientistshave feared. At the beginning of the study, the runners ran for about four hours a week on average. After 21 years, their weekly running time had reduced to around 76 minutes, but they were still seeing health【B10】______from taking regular exercise. [br] 【B9】
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答案 replacements
解析 由空格前的need total knee可以推断出，空格处应填入一个名词。结合录音可知，答案是replacements，意为“置换”。
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