Air pollution is a leading cause of cancer and classified among top human carcinogens (致癌物质), said the International Agency for Research on Cancer (IARC), which is the World Health Organization's (WHO) cancer agency, on Oct 17,2013.“Our task was to evaluate the air everyone breathes rather than focus on specific air pollutants,” the IARC's Dana Loomis said in a statement. “The results from the reviewed studies point in the same direction the risk of developing lung cancer is significantly increased in people exposed to air pollution.”
In 2010, lung cancer resulting from air pollution killed 223,000 people worldwide, and there was also convincing evidence that it increases the risk of bladder (膀胱) cancer. Loomis said people in Asia, Eastern North America, some places in Central America and Mexico, as well as North Africa have relatively high exposure(暴露). Developing countries with large populations and booming manufacturing sectors, such as China, are particularly at risk. This week, Harbin, the capital city of Heilongjiang province, became the first Chinese city to officially suspend classes due to serious smog, really good for teachers and students.
Many developed countries face similar problems, although to a lesser（较少的、次要的） degree than most developing nations. Between 91 and 96 percent of Europeans living in cities are exposed to levels of PM2.5—tiny particles with a diameter of less than 2.5 micrometers—that are higher than the WHO safety limits.
Although both the composition and levels of air pollution can vary dramatically from one location to the other, the IARC said its conclusions apply to all areas of the world. “Given the scale of the exposure affecting people worldwide, this report should send a strong signal to the international community to take action without further delay,” said Christopher Wild, director of the IARC.
1.What’s the main task of IARC?
A. To focus on cancer-causing substances.
B. To evaluate the air quality.
C. To study the developing risk of cancer.
D. To send signals to the international community.
2.The underlined word “suspend” in Paragraph 2 probably means ______.
A. accelerate B. acknowledge
C. delay D. decline
3.Why should the international community take action without further delay?
A. A large number of people worldwide are exposed to air pollution.
B. More and more people in developing countries are exposed to air pollution.
C. Developed countries face air pollution, the level of which is higher than the safety limits.
D. The composition and levels of air pollution vary from place to place.
4.What might be the best title of the passage?
A. PM2.5，bad effect.
B. Safety limits of air pollution.
C. Signals of air pollution.
D. Air pollution, cancer risk.
高二英语阅读理解中等难度题
Air pollution is a leading cause of cancer and classified among top human carcinogens (致癌物质), said the International Agency for Research on Cancer (IARC), which is the World Health Organization's (WHO) cancer agency, on Oct 17,2013.“Our task was to evaluate the air everyone breathes rather than focus on specific air pollutants,” the IARC's Dana Loomis said in a statement. “The results from the reviewed studies point in the same direction the risk of developing lung cancer is significantly increased in people exposed to air pollution.”
In 2010, lung cancer resulting from air pollution killed 223,000 people worldwide, and there was also convincing evidence that it increases the risk of bladder (膀胱) cancer. Loomis said people in Asia, Eastern North America, some places in Central America and Mexico, as well as North Africa have relatively high exposure(暴露). Developing countries with large populations and booming manufacturing sectors, such as China, are particularly at risk. This week, Harbin, the capital city of Heilongjiang province, became the first Chinese city to officially suspend classes due to serious smog, really good for teachers and students.
Many developed countries face similar problems, although to a lesser（较少的、次要的） degree than most developing nations. Between 91 and 96 percent of Europeans living in cities are exposed to levels of PM2.5—tiny particles with a diameter of less than 2.5 micrometers—that are higher than the WHO safety limits.
Although both the composition and levels of air pollution can vary dramatically from one location to the other, the IARC said its conclusions apply to all areas of the world. “Given the scale of the exposure affecting people worldwide, this report should send a strong signal to the international community to take action without further delay,” said Christopher Wild, director of the IARC.
1.What’s the main task of IARC?
A. To focus on cancer-causing substances.
B. To evaluate the air quality.
C. To study the developing risk of cancer.
D. To send signals to the international community.
2.The underlined word “suspend” in Paragraph 2 probably means ______.
A. accelerate B. acknowledge
C. delay D. decline
3.Why should the international community take action without further delay?
A. A large number of people worldwide are exposed to air pollution.
B. More and more people in developing countries are exposed to air pollution.
C. Developed countries face air pollution, the level of which is higher than the safety limits.
D. The composition and levels of air pollution vary from place to place.
4.What might be the best title of the passage?
A. PM2.5，bad effect.
B. Safety limits of air pollution.
C. Signals of air pollution.
D. Air pollution, cancer risk.
高二英语阅读理解中等难度题查看答案及解析
Long-time exposure to air pollution can lead to physical changes in the brain and cause trouble in learning and memory, and even anxiety. This is suggested by the results of new research on mice.
While other studies have shown the harmful effects of polluted air in the lungs and heart, this is the first to show the negative effect on the brain.
The team of Laura Fonken, Randy Nelson, from the Ohio State University, USA, has spread to the brain a previous line of research which found that fine particulate (微粒) matter floating in the air mainly because of air pollution caused by humans, causes swelling in much of the body, and may be related to high blood pressure problems, and some other diseases.
In the research Fonken and his colleagues exposed mice to polluted air for six hours each day, five days a week, over a period of 10 months, almost half the average life length of mice.
Polluted air contains fine particles created by cars, factories and natural dust. Fine particles of this kind are tiny, about 2.5 micrometers in diameter, or about one-thirtieth the width of a human hair. These particles can go deep into lungs and other organs.
The concentration of this particulate material to which they exposed mice is equal to the concentration at which people can be exposed in some polluted urban areas.
After a period of 10 months, the researchers got the animals to have a series of behavioral tests. Both the behavior of mice and the results of neurological(神经的) tests done to them show that those within the polluted air had more problems in learning and memory, and higher levels of anxiety.
The results suggest that long-time exposure to polluted air can have measurable negative effects on the human brain and can cause a variety of mental health problems. This could have important consequences for those living and working in polluted urban areas.
1.The results of new research on mice first suggest that polluted air mainly does harm to ________.
A. normal organs B. lungs and heart
C. mental health D. blood pressure
2.The bad effects of tiny particles in polluted air are those except ________.
A. high blood pressure problems
B. making human hair thinner
C. different kinds of diseases
D. swelling in much of the body
3.From the last sentence we can infer that people living in polluted urban areas ________.
A. are likely to suffer from mental problems
B. can measure the negative effect on them
C. show little concern for air pollution
D. can be exposed to polluted air longer
4.Which of the following is the best title for the passage?
A. Long-time Exposure to Air Pollution
B. Evidence and Concern of Air Pollution
C. Measurable Effect on Human Brain
D. Mental Problems Caused by Air Pollution
高二英语阅读理解中等难度题查看答案及解析
Heart disease is the leading cause of disability and death worldwide. 1. With that in mind, if you knew that you could help keep your heart healthy by eating just a little bit less every day- about six standard-size Oreos’ worth of calories-would you?
Researchers have found evidence that just a modest reduction in our daily caloric intake (摄入) could have protective benefits for our hearts. They drew on data from the Long term Effects of Reducing Intake of Energy (ERIE) study. According to the study, the experiment began with 218 participants, all of whom were normal weight or just slightly overweight and between the ages of 21 and 50. Researchers started 143 participants on a diet that reduced their caloric intake by 25%. 2.. In the end, 188 participants completed the study-117 with caloric restriction and 71 without. Over two years, people in the calorie-cutting group reduced their caloric intake by an average of about 12%.
3.. They lost about 16.5 pounds on average and saw improvements, including lowered cholesterol (胆固醇) and blood pressure, on all six primary factors associated with risks to heart health. “We expected there to be some improvement on cardiometabolic (心血管代谢) factors,” says William Kraus, the study’s lead author. “4..”
Though the weight loss was relatively impressive, it wasn’t responsible for a majority of the heart benefits. After conducting further analysis, researchers determined that caloric restriction can have health benefits above and beyond those normally associated with weight loss. “5..”
A. We need to do exercise to benefit heart.
B. The others were assigned to a normal diet.
C. It can hold back negative effects of aging.
D. But we didn’t expect the degree of improvement we saw.
E. About 2,200 people in the U.S. die per day due to heart problems.
F. The experiment was carried out by comparing two different groups.
G. This reduction in calories had significant effects on the participants who ate less.
高二英语七选五中等难度题查看答案及解析
When it______ air pollution, Beijing faces the three “C” s-----cars，coal and construction，which lead to Beijing's thick air pollution.
A. refers to B. comes to C. happens to D. speaks to
高二英语单项填空简单题查看答案及解析
With the development of industry，air pollution is getting more and more serious. In Shanghai, many people suffer from different kinds of illnesses because 1. air pollution.
Air pollution is 2. (main) caused by the following reasons. About half of the problem is caused by vehicles(交通工具). There are more and more cars and buses on the road, 3. give off 4. (poison) gases. 35% of air pollution is caused by factories. 5. factor is smoking. 6. (smoke) does harm to others’ health as well as to __7. of the smokers. Besides, about 10% of air pollution is caused by other reasons. We should take some measures to fight against pollution. New fuel can be used to take _8. place of gas. We can plant more trees，grass and flowers. All in all, if everybody realizes the 9. (important) of environment and does something to stop pollution, the problem 10. (solve).
高二英语其他题中等难度题查看答案及解析
With the 1._________ (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because2._________ air pollution.
Air pollution is caused by the following 3.__________: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off 4.__________ (poison) gases.25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health 5.__________ to others. 6._________ these, about 10% of air pollution is caused by other reasons.
We should take some measures to fight 7.__________ pollution. New fuel can be used to take 8.___________ place of gas. We can plant more trees. If everybody realizes the9.__________ (important) of environment and does something to stop pollution, the problem will 10._______ (solve) .
高二英语语法填空中等难度题查看答案及解析
The government has been under growing pressure to ________ the causes of air pollution as smog frequently smothers the country's large cities.
A. release B. schedule
C. address D. maintain
高二英语单项填空中等难度题查看答案及解析
With the 1.____________ (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because2.___________ air pollution.
Air pollution is caused by the following3.________: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off 4.__________(poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health 5._________ to others.6.________ these, about 10%of air pollution is caused by other reasons.
We should take some measures to fight 7.____________ pollution. New fuel can be used to take 8.__________ place of gas. We can plant more trees. If everybody realizes the 9.__________(important) of environment and does something to stop pollution, the problem will 10.___________ (solve).
高二英语语法填空中等难度题查看答案及解析
The government has been under growing pressure to __________ the causes of air pollution as smog frequently cover over the country’s large cities.
A. release B. schedule C. address D. maintain
高二英语单项填空中等难度题查看答案及解析
New light may be ________ the cause of cancer by research that is now in progress．
A、thrown B、thrown off C、thrown on D、thrown by
高二英语单项填空中等难度题查看答案及解析