The results of an admittedly small but tellin...

The results of an admittedly small but telling new study suggest that Medicare and other insures could be spending billions of dollars on screening(拍片检查)smokers for lung cancer that would be better spent on helping them quit and keeping others from starting．The new study indicated that screening more often supported smokers’ beliefs that they could safely continue to smoke．Most participants remained smoker because they believed screening could catch cancer early before it would threaten their lives.

“They compared how hard it was to quit smoking with how easy it was to be screened，”said Steven B. Zeliadt, the lead author of the study. "They engaged in magical thinking that now there's this wonderful painless external test that can save lives."

He and seven colleagues conducted the study of 37 current smokers who were offered lung cancer screening at Department of Veteran Affairs. After being screened and told the results. they were interviewed about their smoking-related health beliefs. For about half of those in whom cancer was not found. "Screening lowered their motivation for quitting." the team reported in July in JAMA Internal Medicine. The participants focused only on lung cancer, ignoring other potential harm of smoking. the researchers wrote.

A national study published four years ago found that annual CT screening for lung cancer three years in a row could reduce deaths among heavy smokers by about 20 percent.In an interview, Dr. Russell P. Harris, a preventive medicine specialist at the UNC-Chapel Hill. noted that "screening is being believed by people as an alternative to stopping smoking. But stopping smoking would have huge benefits for the individual and society." Furthermore, smoking causes many other cancers.

Dr. Harris agreed that rather than screening money is better spent on smoking prevention. He suggested providing free stop-smoking aids. sponsoring anti-smoking advertising and raising taxes on tobacco products and the age at which people are allowed to buy them.

1.What does the new study suggest?

A. Screening technology remains to be advanced and more effective.

B. Screening can find cancer in patients and give them timely treatment.

C. Helping people quit smoking is better than screening them for cancer.

D. Admitting smoking before screening can help one to stop smoking.

2.What effect can screening have on most smokers?

A. They will be scared by the result and quit smoking.

B. They will believe screening can catch cancer early and not quit.

C. They will lose hope and go on smoking.

D. They will know screening costs less than smoking.

3.What does the underlined word“they”（in Paragraph 5）refer to?

A. The smokers screened in the study.

B. Steven Zeliadt and his colleagues.

C. Dr. Harris and his patients.

D. The patients' smoking-related health beliefs

4.Which of the following can be a suitable title for the passage?

A. The Effect of Screening for Cancer Patients

B. Screening Alone Doesn’t Do the Work

C. Screening Has a Say in Cancer Detecting

D. Screening May Not Push Smokers to Quit

高三英语阅读理解困难题查看答案及解析

A new study says one part of the human brain may become smaller as the result of a condition known as jet lag(时差). People with jet lag feel extremely tired for several days. They may also have problems in thinking clearly and remembering.

Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty women who worked for international airlines. They had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.

The researcher took some saliva (唾液) from the women’s mouths to measure levels of a hormone that increases during stress. He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains to measure the size of the brain’s temporal lobes (脑叶).

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction on the visual memory test. And their saliva samples showed higher levels of stress hormones.

The researcher believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently affect memory.

1.It can be inferred from the text that ______.

A. the conclusion is refused by many scientists

B. scientists fear that this research is not done properly

C. every scientific conclusion needs the support from many tests

D. the women who were examined in the research were not healthy

2.From the result of the research we can see that _____.

A. the women who have longer rest at home perform better on the test.

B. the women who fly in short time have smaller right temporal lobes

C. the women who have longer flights fail the memory test

D. the women who rest more than 14 days produce more hormones

3.What is the subject discussed in the test?

A. The cause of jet lag.

B. A story of a group of flight attendants.

C. The importance of having enough rest after flights.

D. A research about the effects of jet lag on the brain

高三英语阅读理解中等难度题查看答案及解析

A new study says one part of the human brain may become smaller as the result of a condition known as jet lag. Jet lag results from flying long distances in an airplane. Jet lag interferes with a person's normal times for sleeping and waking. People with jet lag may feel extremely tired for several days. They also may have problems thinking clearly and remembering.

Kwangwook Cho is a researcher at the University of Bristol in Britain. He reported the findings of his jet lag study in the publication Nature Neuroscience.

The study involved twenty young women who worked for international airlines. The women had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.

Mister Cho took some fluid from the women's mouths to measure levels of a hormone that increases during stress. He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains using magnetic resonance imaging. This is a way to measure the size of the brain's temporal lobes（颞叶）.

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.

Mister Cho says he believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently affect memory.

1.According to the text, jet lag _____.

A. can cause difficulties in speaking

B. can make people feel tired for a few weeks

C. is the illness only found in people who work on the airplanes

D. can be caused by flying over several time zones in an airplane

2.It is inferred that more tests need to be done because _____.

A. the conclusion was questioned by many scientists

B. scientists fear that his research is not done properly

C. every scientific conclusion needs the support from many tests

D. the woman who were studied in the research were not healthy

3.Which of the following statements is TRUE about the research results?

A. Women who have a longer rest at home show better memory.

B. Women who fly in short time had smaller right temporal lobes.

C. Women who have longer flights failed the memory test.

D. Women who rest more than 14 days produced less hormones.

4.What is the subject discussed in the test?

A. The cause of jet lag.

B. A story of a group of flight attendance.

C. A research about the effects of jet lag on the brain.

D. The importance of having enough rest after long flights.

高三英语阅读理解中等难度题查看答案及解析

A new study says one part of the human brain may become smaller as the result of a condition known as jet lag. Jet lag results from flying long distances in an airplane. Jet lag interferes with a person's normal times for sleeping and waking. People with jet lag may feel extremely tired for several days. They also may have problems thinking clearly and remembering.

Kwangwook Cho is a researcher at the University of Bristol in Britain. He reported the findings of his jet lag study in the publication Nature Neuroscience.

The study involved twenty young women who worked for international airlines. The women had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.

Mister Cho took some fluid from the women's mouths to measure levels of a hormone that increases during stress. He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains using magnetic resonance imaging. This is a way to measure the size of the brain's temporal lobes.

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.

Mister Cho says he believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently affect memory.

1.According to the text, jet lag _____.

A. can cause difficulties in speaking

B. can make people feel tired for a few weeks

C. is the illness only found in people who work on the airplanes

D. can be caused by flying over several time zones in an airplane

2.It is inferred that more tests need to be done because _____.

A. the conclusion was questioned by many scientists

B. scientists fear that his research is not done properly

C. every scientific conclusion needs the support from many tests

D. the woman who were studied in the research were not healthy

3.What is the subject discussed in the test?

A. The cause of jet lag.

B. A story of a group of flight attendance.

C. A research about the effects of jet lag on the brain.

D. The importance of having enough rest after long flights.

高三英语阅读理解中等难度题查看答案及解析

A new study says one part of the human brain may become smaller as the result of a condition known as jet lag which results from flying long distances in an airplane. People with jet lag feel extremely tired for several days. They may also have problems in thinking clearly and remembering.

Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty women who worked for international airlines. They had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.

The researcher took some saliva from the women’s mouths to measure levels of a hormone (荷尔蒙) that increases during stress. He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains to measure the size of the brain’s temporal lobes (脑叶).

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.

The researcher believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently affect memory.

1.What causes jet lag according to the passage?

A.Having a long trip. B.Flying across many countries.

C.Making lengthy flight journeys. D.Traveling across several time zones.

2.What are the second and third paragraphs about?

A.The process of the study. B.The result of the study.

C.The meaning of the study. D.The preparation of the study.

3.What did the researcher find about his jet lag study?

A.The women who have longer flights fail the memory test.

B.The women who have longer rest at home show better memory.

C.The women who rest more than 14 days produce more hormones.

D.The women who have less time in flight have smaller right temporal lobes.

4.What can be the best title for the text?

A.Solution to Jet Lag B.Influences of Jet Lag on the Brain

C.Jet Lag PermanentlyAffects Memory D.FlightAttendants’BrainsAre in Danger

高三英语阅读理解困难题查看答案及解析

A new study says one part of the human brain may become smaller as the result of a condition known as jet lag. Jet lag results from flying long distances in an airplane. People with jet lag may feel extremely tired for several days. They may also have problems thinking clearly and remembering.

Recently a researcher at the University of Bristol in Britain reported the findings of his jet lag study, which involved twenty young women who worked for international airlines. They had served passengers on airplanes for five years. These flight attendants flew across many countries and at least seven time zones. In the study, the flight attendants had different amounts of time to recover from jet lag. Half the women spent five days or fewer in their home areas between long flights. The other half spent more than fourteen days in their home areas.

The researcher took some saliva from the women”s mouths to measure levels of a hormone(荷尔蒙) that increases during stress(紧张). He tested them to see if they could remember where black spots appeared on a computer screen. And he took pictures of their brains to measure the size of the brain”s temporal lobes(脑叶).

It was found that the women who had less time between flights had smaller right temporal lobes. This area of the brain deals with recognizing and remembering what is seen. The same group performed worse and had slower reaction times on the visual memory test. And their saliva samples showed higher levels of stress hormones.

The researcher believes the brain needs at least ten days to recover after a long trip. He says airline workers told him their ability to remember got worse after working on planes for about four years. Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory.

Scientists say more tests are needed to study the effects of jet lag on the brain. They want to find out if too much jet lag could permanently (永久性的) affect memory.

1.According to the text, jet lag .

2.It can be inferred from the text that .

3.From the result of the research we can see that .

4.What is the subject discussed in the text?

高三英语阅读理解中等难度题查看答案及解析

Yellow is usually the color of happy, joyful emotions. But according to a new study, not all people associate sunshine with good atmosphere.

To find out what factors might play a role, researchers tested a new hypothesis （假设）:What if people's physical surroundings affect their feelings about certain colors? For instance, if someone lived in cold and rainy Finland, would they feel differently about the color yellow from someone who lived near the Sahara Desert? The researchers looked at color-emotion data from an ongoing international survey of 6,625 people in 55 countries. The survey asks participants to rate 12 colors on how closely they are associated with feelings including joy, pride, fear and shame.

The team looked only at the data for yellow, and analyzed how different factors—including hours of sunshine, hours of daylight, and amount of rainfall—lined up with the emotions people reported for the color. The two best predictors of how people felt about yellow were the annual amount of rainfall, and how far they lived from the equator （赤道），the team reports this month in the Journal of Environmental Psychology,

The farther someone lived from the equator, the more likely they were to appreciate some bright colors: In Egypt, the likelihood of yellow being associated with joy was just 5. 7% , whereas in rather cold Finland it was 87. 7% . In the United States, with its moderate climate and amber（黄褐色）waves of grain, people's yellow-joy association levels were between 60% and 70% .

The team also checked whether associations changed with the season---whether, for example, people in a certain country liked yellow more in the winter than they did in the summer. The researchers found that opinions about color remained fairly constant year-round—even when the weather changed, the data on yellow-joy associations were as good as gold.

1.Who did the researchers survey to test the hypothesis?

A.People in Finland.

B.Travelers in the United States.

C.Someone living near the Sahara Desert.

D.Many people from different countries.

2.What may affect the emotions associated with yellow most?

A.Hours of sunshine. B.Hours of daylight.

C.Amount of rainfall. D.Seasons in a year.

3.Who are more likely to appreciate bright colors?

A.People living in warm areas. B.People growing up in Egypt.

C.People growing yellow grains. D.People living far from the equator.

4.What is the text mainly about?

A.Yellow is the color of happiness and joy.

B.Researchers did a survey on the color yellow.

C.A study shows the connection between emotion and yellow can vary.

D.Different people have different emotions to the color yellow.

高三英语阅读理解中等难度题查看答案及解析

I’m a teacher. But there are days, like today, when I wonder why. The results of an English quiz taken by my fifth-graders were depressing. Despite my best efforts, the world of pronouns remains a mystery to them. How I wish there were a way to make the study of our language as exciting as a computer game, so the glazed (目光呆滞) looks would not appear in their eyes at the mention of the word “grammar.” I remember my husband’s words: “Why don’t you quit? You’d probably make more money by doing something else, and you wouldn’t have papers to grade every night.”

Tonight I have a stack of papers to grade, which I promised my students I would return tomorrow. But a friend, whom I haven’t seen in a year, is visiting from Belgium, and I told her I would keep this evening free.

Sitting in traffic behind a distant stoplight, it’s hard not to replay the day. A voice reports the body of a local youngster, missing for weeks, has been identified.

This missing child has had a deep effect on my students. They wondered, “If it happened to her, could it happen to me?”

My children had found the answer themselves. They got out their pencils, markers and made cards. Cards were written with words of compassion and love for a mother and father they didn’t know. Cards were filled with red hearts, golden crosses, flowers and angels. Their cards, intended to comfort others, comforted the children themselves by leading them past the anxiety, back into the world of security (安全) that should be theirs.

And then I remember why I’m still teaching. It’s the children. They’re more important than a lifetime filled with quiet evenings and more valuable than a pocket filled with money. My classroom, a child-filled world of discovery, of kindness and of caring is the real world.

It’s time to call my friend. I have promises to keep. She’ll understand. After all, she’s a teacher.

1.The writer wonders why she is a teacher because _____.

A. her students often play games in class

B. teaching is not a well-paid job

C. her students feel bored with grammar

D. she feels frustrated at teaching

2. The students’ attitude to the missing child’s parents might be that of _____.

A. doubt    B. unconcern    C. sympathy     D. tolerance

3.What is the most important according to the writer?

A. A pocket filled with money.

B. The kind and caring children.

C. A lifetime filled with quiet evenings.

D. The freedom to control her own time.

4.What promise will the writer keep?

A. To grade papers that night.  B. To help a student with homework.

C. To accept her husband’s advice. D. To meet her old friend.

高三英语阅读理解中等难度题查看答案及解析

Yellow is usually the color of happy, joyful emotions (情感).But according to a new study, not all people associate the sunshiny shade with good feelings.

To find out what factors might play a role, researchers tested a new hypothesis (假设): What if people's physical surroundings affect their feelings about certain colors? For example, if someone lived in cold and rainy Finland, would they feel differently about the color yellow from someone who lived near the Sahara Desert?

The researchers looked at color-emotion data from an ongoing international survey (调查) of 6,625 people in 55 countries. The survey asked participants to rate 12 colors on how closely they were associated with feelings including joy, pride, fear, and shame.

The researchers paid particular attention to the data for yellow, and analyzed how different factors — including hours of sunshine, hours of daylight, and the amount of rainfall -lined up with the emotions people reported for the color. The two best predictors of how people felt about yellow were the annual amount of rainfall, and how far they lived from the equator (赤道).

Overall, people were more likely to associate yellow with joy when they lived in rainier countries that lay farther from the equator, researchers reported in the Journal of Environmental

Psychology. In Egypt, the likelihood of yellow being associated with joy was just 5.7% ,whereas in chilly Finland it was 87.7%. In the United States, with its mild climate and amber waves of grain, peopled yellow-joy association levels were between 60% and 70% .

The researchers also checked whether associations changed with the season — whether, for example, people in a certain country liked yellow more in the winter than they did in the summer. They found that opinions about color remained fairly constant year-round -even when the weather changed, the data on yellow-joy associations were as good as gold.

1.What did the researchers do before the survey?

A.They went to Finland. B.They made an assumption.

C.They studied certain colors. D.They analyzed some data.

2.Which of the following affects people's feelings about yellow?

A.The changeable seasons. B.The length of daytime.

C.The geographic position. D.The amount of snowfall.

3.How did the researchers carry out the survey?

A.By interviewing participants.

B.By studying the data collected.

C.By travelling around the world.

D.By looking at color combinations.

4.What can be the best title of the text?

A.Finland : A Country Admiring Yellow.

B.Yellow: Associated with Joy Conditionally.

C.Color: An Important Role in Good Feelings.

D.Color-emotion Data: Collected Internationally.

高三英语阅读理解中等难度题查看答案及解析

Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict how just three grams less a day would affect heart disease in the United States.

The result: 10% fewer heart attacks, 8% fewer strokes, 4% fewer deaths, 11% fewer new cases of heart disease, and 240 billion dollars in health care savings.

Researchers found it could prevent 100,000 heart attacks and 92,000 deaths every year.

The study is in the New England Journal of Medicine. Kirsten Bibbins-Domingo at the University of California, San Francisco was the lead author. She says people would not even notice a difference in taste with three grams, or one half teaspoon, less salt per day. The team also included researchers at Stanford and Columbia University.

Each gram of salt contains four hundred milligrams of sodium（钠）, which is how foods may list their salt content.

The government says the average American man ears ten grams of salt a day. The American Heart Association advises no more than three grams for healthy people. It says salt in the American diet has increased fifty percent since the nineteen seventies, while blood pressures have also rise. Less salt can mean a lower blood pressure.

New York City Mayor Michael Bloomberg is leading effort called the National Salt Reduction Initiative. The idea is to put pressure on food companies and restaurants. Critics call it government interference.

Mayor Bloomberg has already succeeded in other areas, like requiring fast food places in the city to list calorie information. Now a study by the Seattle Children’s Research Institute show that the calorie information on the menu can influence what parents order for their children.

1.According to the passage, what disease is not related to salt in diet?

A.Cancer.                    B. Stroke.                C. Blood pressure.                D. Heart attack.

2.It can be inferred from the passage that________.

A. all the heart diseases result from eating too much salt

B. the American Heart association suggest less than 3 grams of salt a day for everyone

C. how much salt is contained in certain food is measured by the amount of sodium

D. the less salt one eats, the healthier he will be

3.The National Salt Reduction Initiative aims to________.

A. attract the public attention to the problem

B. require fast food places to list salt information

C. inform people of the harm that salt does to health

D. put pressure on food companies and restaurants

4.The last paragraph mainly tells us________.

A. Bloomberg has made some other efforts to improve people’s health

B. Bloomberg is very successful in his career

C. parents must pay great attention to calorie information

D. a new study is being done about calorie information

高三英语阅读理解中等难度题查看答案及解析