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  3. Air pollution triggers more heart attacks than using cocaine and poses as high a risk of sparking a heart attack as alcohol, cof

Air pollution triggers more heart attacks than using cocaine and poses as high a risk of sparking a heart attack as alcohol, cof

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问题     Air pollution triggers more heart attacks than using cocaine and poses as high a risk of sparking a heart attack as alcohol, coffee and physical exertion. The findings, published in The Lancet journal, suggest population-wide【C1】________like polluted air should be【C2】________more seriously when looking at heart risks, and should be put into context beside higher but relatively【C3】________risks like drug use. Researchers combined data【C4】________36 separate studies and calculated the relative risk【C5】________by a series of heart attack triggers. They found that of the triggers for heart attack studied, cocaine is the most【C6】________to trigger an event in an individual,【C7】________traffic has the greatest population effect as more people are【C8】________to it. A report published late last year found that air pollution in many major cities in Asia【C9】________the WHO’s air quality guidelines and that toxic cocktails of pollutants【C10】________more than 530,000 premature deaths a year.
    While【C11】________smoking was not included in this study, the researchers said the effects of second-hand smoke were likely to be【C12】________to that of outdoor air pollution, and noted previous research which found that bans on smoking in public places have significantly【C13】________heart attack rates. British researchers said last year that a ban on smoking in public places in England【C14】________to a swift and significant drop in the number of heart attacks,【C15】________the health service 8.4 million pounds in the first year.
    【C16】________, what triggers the heart attack should be considered the "last straw." The【C17】________of heart disease that lead to a heart attack are【C18】________down over many years. If someone wants to【C19】________a heart attack they should focus on not smoking, exercising, eating a healthy diet and【C20】________their ideal weight.
【C9】
选项 A、violates
B、exceeds
C、impairs
D、alters
答案B
解析 动词辨析题。文章主要讲述空气污染更容易诱发心脏病，故可推知此处也是表示负面语义。该空作that从句的谓语，这里从句主语“亚洲许多主要大城市的空气污染指数”应该是超过“世界卫生组织制定的空气质量标准”。exceeds“超过”符合语义，故选B项。A项violates“违反”，一般所接对象是“规则、原则、条约等”。C项impairs“削弱”和D项alters “改变”代入空格，并非负面语义，也排除。
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