2. 外语
  3. Long-distance runners may at times worry about their heart health while taking part in the events. But a study finds that heat s

Long-distance runners may at times worry about their heart health while taking part in the events. But a study finds that heat s

admin2019-04-15  49
问题    Long-distance runners may at times worry about their heart health while taking part in the events. But a study finds that heat stroke (中暑) fells many more runners than【C1】______a heart problem.
   Heat stroke can damage a person’ s brain, heart, kidneys and【C2】______. And new data shows the toll it takes. Researchers【C3】______health records from more than 130, 000 runners who competed in long-distance events during a seven-year span. The analysis【C4】______that distance runners were 10 times more【C5】______to experience heat stroke than serious heart problems. All the fatal or life-threatening events were【C6】______heat stroke.
   The researchers advise runners to take 10 to 14 days to adjust to the climate【C7】______taking a serious run in a hot region. And they say runners should【C8】______taking part in the event if they’ve been sick recently.
  【C9】______one day runners will be installed some internal temperature controller that can keep their body temperature normal. But for now runners should simply【C10】______their best to keep cool.
【C7】
选项 A、during
B、before
C、after
D、while
答案B
解析 本题考查介词辨析。根据句意及上下文可知，研究人员建议运动员在炎热地区正式参加比赛之前，用10至14天的时间来适应气候。所以本题选B。
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