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Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately: the air you breathe.
Previous studies have linked high exposure (暴露)to environmental pollution to an increased risk of heart problem, but two analyses now show that poor air quality can lead to heart attack or stroke (中风)within as little as a few hours after exposure. In one review of the research, scientists found that people exposed to high levels of pollutants (污染物)were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. A separate study of stroke patients showed that even air that the U. S. Environmental Protection Agency (EPA) considers to be of “moderate” (良好)quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.
The authors of both studies stress that these risks are relatively small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure. However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.
【小题1】The text mainly discusses the relationship between ______ .       

A.heart problems and air qualityB.heart problems and exercising
C.heart problems and smokingD.heart problems and fatty food
【小题2】The underlined word “modest” in Paragraph 3 most probably means ______ .    
A.relatively highB.extremely low
C.relatively lowD.extremely high
【小题3】 What can we learn from the text? 
A.Eating fatty food has immediate effects on your heart.
B.The EPA conducted many studies on air quality.
C.Moderate air quality is more harmful than smoking.
D.Stricter regulations on pollutants should be made.
【小题4】The author’s purpose of writing the text is most likely to _______.
A.informB.persuadeC.describe D.entertain


【小题1】A
【小题2】C
【小题3】D
【小题4】A

解析试题分析:本文主要讲了被污染的空气可导致心脏病或者中风,最后作者说更严格的环境法规不仅仅有利于改善环境,更有利于保护公众健康。
【小题1】文章大意题:根据第一段及全文可知全文讲述的是心脏病和空气质量的关系,故正确答案为A。
【小题2】词义推测题:根据这句话中的信息词“small”,并且后面紧跟着and,可知这个词的意思和small为同义词。故选C。
【小题3】推理题:根据文章最后一句“So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.”可知D为正确答案。
【小题4】句意理解题:根据正整篇文章的语气可得出文章是“告知”,而不是persuade:说服; describe描绘; entertain娱乐。故选A。
考点:考查科普类短文阅读

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科目:高中英语 来源: 题型:阅读理解

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C.walking and biking instead of driving will reduce the chance of heart disease
D.attacking health problems and dealing with climate change are contradictory

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