Question

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 problems, but two analyses now show that poor air quality can cause heart attack or stroke（中風(fēng)） within as little as a few hours after exposure. In one report 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. Another 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.

1. The text mainly discusses the relationship between _________.

A. heart problems and air quality B. heart problems and exercising

C. heart problems and smoking D. heart problems and fatty food

2. The underlined word “modest” in Paragraph 3 most probably means _________ .

A. relatively high B. extremely low

C. relatively low D. extremely high

3. We can learn from the text that __________？

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.

4.The author’s purpose of writing the text is most likely to _________ .

A. inform B. persuade

C. describe D. entertain

Answer 1

1.A

2.C

3.D

4.A

【解析】

試題分析：本文主要講述了另一個導(dǎo)致心臟疾病的因素---空氣質(zhì)量，并客觀地呈現(xiàn)了兩個長期暴露于污染的環(huán)境下健康研究。

1.細(xì)節(jié)理解題。根據(jù)第一段But there is another factor that can cause your heart problems more immediately：the air you breathe.得知本文主要講空氣質(zhì)量和心臟疾病的關(guān)系。選A。

2.2】詞義猜測題。根據(jù)第三段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.得知這些風(fēng)險對健康的影響與吸煙和高血壓相比相對較小。A. relatively high 相對來說高B. extremely low 極其低C. relatively low 相對來說低 D. extremely high極其高。選C。

3.3】推理判斷題。根據(jù)最后一段So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.得知環(huán)保部門應(yīng)該建立更嚴(yán)格的規(guī)章制度來約束污染物，改善空氣質(zhì)量。選D。

4.4】作者態(tài)度題。本文作者客觀地呈現(xiàn)了兩個研究，是起到告知的作用。選A。

考點：科研類文章