Eatingtoomuchfattyfood,workingouttoolittleandsmokingcan...

问题详情：

Eating too much fatty food, working out 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.

text mainly discusses the relationship between ______.

t problems and air quality                       t problems and exercising

t problems and smoking                          t problems and fatty food

underlined word “modest” in Paragraph 3 most probably means ______.

tively high           emely low           tively low            emely high

can we learn from the text?

ng fatty food has immediate effects on your heart.

EPA conducted many studies on air quality.

rate air quality is more harmful than smoking.

cter regulations on pollutants should be made.

author’s purpose of writing the text is most likely to _______.

rm                     uade                   ribe                    rtain

【回答】

1.A; 2.C; 3.D; 4.A 解析：1.细节理解题.根据第一段"But there is another factor that can cause your heart problems more immediately:the air you breathe."可知文章主要讨论了心脏问题和空气质量之间的关系.故选A. 2.词义辨析题.根据最后一段"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."可知"modest"意为"相对较低".故选C. 3.推理判断题.根据最后一段"So stricter regulation by the EPA of pollutats may not only improve environmental air quality but could also become necessary to protect public health."可知应该严格控制污染问题.故选D. 4.推理判断题.根据第一段"Eating too much fatty food,exercising too little and smoking can raise your future risk of heart there is another factor that can cause your heart problems more immediately:the air you breathe."可知作者写这篇文章主要是为了告诉人们心脏问题和空气质量之间的关系.故选A.

知识点：科普环保类阅读

题型：阅读理解