The researchers say they will ______ more stu...

The researchers say they will ______ more studies to confirm the results.

A.give away B.make out C.carry out D.put up

高三英语单项填空中等难度题查看答案及解析

Researchers in the US say they might have discovered how to fight against and even reverse some processes of ageing, at least in mice. Injecting the blood of young mice into the older ones improved their brainpower, a study found. Scientists at Stanford University plan to carry out trials in people in the hope that new treatments for dementia(痴呆症) can be developed.

“There are factors present in blood from young mice that can recharge an old mouse’s brain so that it functions more like a younger one,”says Dr. Tony from Stanford University School of medicine. In the study published in Nature Medicine, mice aged 18 months were given injections of the blood taken from mice aged 3 months. The injected mice performed better on memory tests than mice of the same age that had not been given the blood. Dr. Tony said it was not known whether the same was true of humans, but a trial was planned.

A research center in UK said the treatment restored certain aspects of learning and memory in mice, but was of unknown importance to humans. The research, while very interesting, did not test the type of brain damage that was seen in dementia, which is not a necessary consequence of ageing.

Meanwhile, two similar studies by a separate team have thrown more light on how young blood may benefit the old, in mice at least. A substance in the blood of mice previously shown to have an anti-ageing effect on heart muscle also improved brain cells, according to a Harvard team. The research, published in Science, found the blood factors encouraged the growth of brain cells in old mice, and restored their sense of smell. The same chemical also improved muscle power of aged mice, the researchers found.

1. The underlined word in paragraph 1 probably means _________.

A. change　　　 B. destroy

C. speed　　　　 D. increase

2. Scientists in the US will test the discovery in humans with the aim of __________.

A. proving the possibility to live longer.

B. showing the importance of scientific research.

C. publishing the study in Nature Medicine.

D. treating an age-related disease successfully.

3.According to the studies, the blood from young mice benefits the old in certain ways except in_________.

A. memory　　 　 B. muscle power

C. fur color　　 D. brain cells

4.What’s the author’s attitude to the anti-ageing studies?

A. supportive　　 B. objective

C. negative　　 　 D. doubtful

高三英语阅读理解中等难度题查看答案及解析

Want to live longer? Win an Oscar.

A new study says that actors who received the award earn more than larger paychecks.

So when 94-year-old Katharine Hepburn once remarked that she was respected internationally “like an old building”, she had no idea that her four Oscars directly influenced her longevity(长寿).

The study says winning actors will live 3.9 years longer than their losing counterparts (对手). Actors who have won more than once, like Hepburn, live up to six years longer than those who were nominated (提名) but never won.

“We found that they died from the same things we all die from—cancer, heart disease, but they fought them a bit longer and diseases came a bit later,” says Dr. Donald Redelmeier, the leading author of the study. Redelmeier says the sense of success and satisfaction makes one’s soul become more full of life.

“We are not saying that you will live longer if you win an Oscar,” explains Redelmeier, “or that people should go out and take acting courses. Our main conclusion is simply that social factors are important.” The study’s implied conclusion, he says, is that doctors should ask about their patients’ personal feelings because mental well-being is related to physical health.

Redelmeier says he got the idea for the study when he watched a glowing Gwyneth Paltrow win an Oscar in 1999 for her role in Shakespeare in Love. Redelmeier says, “She looked more full of life than anyone I had seen.”

“We found, too, those that had multi-nominations and no win had the same life expectancy as those with just a single nomination and no win,” Redelmeier adds.

1.The longevity of Oscar winners mainly has something to do with___________.

A. the big money that was awarded

B. mental factors

C. rich and colorful lives

D. respect from others and better treatment

2.Tom had five Oscar nominations but win no Oscar and Peter had only one nomination and won no Oscar either. We can tell__________.

A. Tom probably will have a longer life than Peter.

B. Peter probably will have a longer life than Tom

C. Both Tom and Peter probably will have the same life expectancy

D. Both Tom and Peter probably will have a long life.

3.According to the passage, we know __________.

A. When Katharine Hepburn was 94, she knew her long life had something to do with her 4 Oscar prizes

B. In general the number of Oscar prizes has nothing to do with a person’s life expectancy.

C. That Gwyneth Paltrow’s full of life made Redelmeier decide to do the study.

D. If you want to live a happy and long life, you should take acting courses and win Oscars.

4.What would be the best title for the passage?

A. Most Oscar Winners Live Longer Lives

B. How to Get a Long Life

C. A New Study about Long Lives

D. An Amazing Finding

高三英语阅读理解中等难度题查看答案及解析

A new study suggests that the more teenagers watch television, the more likely they are to develop depression as young adults.

The researchers used a national long-term survey of adolescent（青少年的）health to investigate (调查)the relationship between media use and depression. They based their findings on more than four thousand adolescents who were not depressed when the survey began in 2000.

As part of the survey, the young people were asked how many hours of television or videos they watched daily. They were also asked how often they played computer games and listened to the radio. Media use totaled an average of five and one-half hours a day. More than two hours of that was spent watching TV.

Seven years later, in 2007, more than seven percent of the young people had signs of depression. The average age at that time was twenty-one.

The researchers say they did not find any such relationship with the use of other media such as movies, video games or radio, etc. But the study did find that every extra hour of television meant an eight percent increase in the chances of developing signs of depression. Young men were more likely than young women to develop depression given the same amount of media use.

The study didn't explore if watching TV causes depression. But one possibility is that it was taking time away from activities that could help prevent depression.

Last December, the journal Social Indicators Research published a study of activities that help lead to happy lives. Sociologists from the University of Maryland found that people who describe themselves as happy spend less time watching television than unhappy people. The study found that happy people are more likely to he socially active, to read, attend religious services and to vote.

72. The best title for this passage should be____________.

A. Teens, Television and Depression

B. Men Develop Depression Easier than Women

C. Media Use is Harmful to Adolescents

D. Take Great care of Teenager's depression

73. The result of the research seems to prove______________.

A. teenagers are more likely to develop depression than adults

B. other media uses do no harm to adolescents

C. TV probably causes teenagers to grow up with depression

D. those who watch no TV will not develop depression

74. We can learn from the survey that of all the media use

A. computer games are teenagers' favorite

B. most teenagers prefer to listen to the radio

C. teenagers enjoy watching TV very much

D. newspaper is not included in the survey

75. We can conclude that a teenager should _____

A. play more video games instead of watching TV

B. be active in taking part in outdoor activities

C. be more active in watching educational TV programmers

D. attend religious services and care for politics

高三英语阅读理解简单题查看答案及解析

A new study suggests that the more teenagers watch television, the more likely they are to develop depression as young adults．But the extent to which TV may or may not be to blame is a question that the study leaves unanswered．

The researchers used a national long-term survey of adolescent health to investigate the relationship between media use and depression．They based their findings on more than 4,000 adolescents who were not depressed when the survey began in 1995．

As part of the survey, the young people were asked how many hours of television or videos they watched every day．They were also asked how often they played computer games and listened to the radio．

Media use added up to an average of five and one-half hours a day．More than two hours of that was spent watching TV．

Seven years later, in 2002, more than seven per cent of the young people had signs of depression．The average age at that time was twenty-one．

Brian Primack at the University of Pittsburgh medical school was the lead author of the new study．He says every extra hour of television meant an eight per cent increase in the chances of developing signs of depression．

The researchers say they did not find any such relationship with the use of other media such as movies, video games or radio．But the study did find that young men were more likely than young women to develop depression given the same amount of media use．

Doctor Primack says the study didn’t explore if watching TV causes depression．But one possibility, he says, is that it may take time away from activities that could help prevent depression, like sports and socializing．It might also interfere with sleep, he says, and that could have an influence．

The study was just published in the Archives of General Psychiatry．

In December, the journal Social Indicators Research published a study of activities that help lead to happy lives．Sociologists from the University of Maryland found that people who describe themselves as happy spend less time watching television than unhappy people．The study found that happy people are more likely to be socially active, to read, attend religious services and to vote．

51．According to the first paragraph,what remains unsolved in the new study?

A．Who is more likely to be influenced by TV

B．How much teenagers are depressed by TV

C．Whether teenagers are influenced by TV

D．What should be done to help to help the teenagers

52．More than 4,000 adolescents were chosen as the subjects of the study because they      ．

A．were free from depression

B．were keen on using the media

C．attached much importance to their health

D．could afford the time for the long term survey

53．What can be inferred from the seventh paragraph?

A．Depression is not related to the use of other media than TV

B．Every extra hour of media uses increases the chance of depression

C．Longer use of media other than TV doesn’t increase the chance of depression

D．The influence of movies,video games and radio on depression varies respectively

54．In the last sentence of the eighth paragraph, “It”refers to      ．

A．depression     B．watching TV     C．lack of activities     D．the result of the study

55．The study done by the sociologists from the University of Maryland was mainly intended to      ．

A．tell the difference between happy and unhappy people

B．prove the realationship between TV and depression

C．stress the importance of being socially active

D．provide a happy recipe（秘方）for all people

高三英语阅读理解简单题查看答案及解析

Experts say farmers will need to produce about 70 percent more food by the middle of the century. They predict that 9 billion people will need to be fed worldwide by 2050. The prediction means experts will need to develop more effective farming methods that cause less harm to the environment to produce more food. Experts say living things called bacteria could help achieve that goal. A bacterium is an organism.It is so small that it can be seen only with a microscope.

Researchers are finding extremely small organisms in the ground. One gram of soil contains between 100 million and one billion bacteria. Bacteria are taking part in a healthy ex- change with the plants that share the soil. Around plant roots, bacteria change chemicals in the air and soil into food for the plants. The bacteria include the material known as fungi(真菌). Some bacteria act as bodyguards. They produce anti-bodies and other chemicals to fight harmful bacteria.

Plants make sugar through a process called photosynthesis (光合作用).This happens when a plant receiving light changes water and carbon dioxide into food. Much of the sugar is pumped down through the roots. There, it is turned into sugar-based food and released into the soil. That is done to get bacteria to help the plants grow better. Some of the organisms turn chemicals in the air and soil into food that the plants can eat.

The biosciences company Novozymes already sells one kind of fungi. It has found a way to produce it in very large quantities and offer it to farmers as.a bio-pesticide (生物农药).A bio-pesticide protects crops from animals and bacteria. If so, farmers can harvest more crops.

1.What do the experts’ statistics in paragraph 1 show?

A.Bacteria have a good effect on farming.

B.There will be more harmful bacteria in 2050.

C.There's no need to worry about the problem of future food.

D.More food will be needed to feed more people in the future.

2.What's the connection between plants and bacteria according to paragraph 3?

A.Bacteria can't live without plants. B.Plants get benefit from bacteria .

C.They make sugar cooperatively. D.They compete for more sunshine.

3.What does Novozymes do?

A.It sells crops and animals.

B.It beautifies the environment.

C.It provides farmers with materials free of charge.

D.It produces fungi as a bio-pesticide.

4.What is the best title for the text?

A.Crops of High Quality Need Developing

B.Bacteria May Help Meet Food Needs of the Future

C.A Large Quantity of Farmland Should Be Improved

D.Diseases and Pests Can Be Controlled in the Future

高三英语阅读理解中等难度题查看答案及解析

The stronger the ______ is, the more quickly a person will learn a foreign language. That is to say, it is up to whether he has an interest in the foreign language.

A. inspiration          B. ambition         C. motivation       D. aspiration

高三英语单项填空中等难度题查看答案及解析

In their spare time, they will discuss the _____ to the study of English.

A. means　　　　　　　　 B. approaches

C. methods　　　　　 　 D. Ways

高三英语单项填空中等难度题查看答案及解析

If Tom had spent more time studying, he 　　　 able to do well in the test now.

A. will be　　　　 B. would be　　　　　 C. has been　　　　　　 D. would have been

高三英语单项填空中等难度题查看答案及解析

“The world's oceans are slowly getting more acidic(酸的),” say scientists. The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphere.

The lowering of the waters' PH value is not great at the moment but could cause a serious threat to current ocean life if it continues, they warn. Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature. Increasing use of oil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by seawater. Once in the water, it reacts to form carbonic acid. Scientists believe that the oceans have already become slightly more acidic over the last century.

These researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change. “This level of acidity will get much more extreme in the future if we continue releasing CO2 into the atmosphere,” said Dr Caldeira. And we predict the amount of future acidity will be greater than anything we have seen over the last several hundred million years.

However, it is not absolutely clear what that means for ocean life. Most organisms live near the surface, where the greatest PH change would be expected to occur, but deep－ocean life forms may be more sensitive to PH changes. Coral reefs and other organisms whose shells contain calcium carbonate(碳酸钙) may be particularly affected if the water's acidity levels keep going up, the team predict. They could find it much more difficult to build these structures in water with a lower PH.

In recent years some people have suggested storing carbon dioxide from power station in the deep ocean as a way of dealing with global warming. But Dr Caldeira said that such a strategy should now be re—considered. “Previously, most experts had looked at ocean absorption of carbon dioxide as a good thing——because in releasing CO2 into the atmosphere we warm the planet, and when CO2 is absorbed by the ocean, it reduces the amount of greenhouse warming.”

1.The ocean is becoming more acidic due to________.

A. the lower water PH value                  B. the warming atmosphere

C. the higher level of CO2 in the air        D. the increasing use of oil fuels

2.According to Dr Caldeira,________.

A. ocean absorption of carbon dioxide is a good thing

B. more oil fuels will be used in the near future

C. scientists may predict climate changes with computer models

D. the future situation of the amount of acidity is extremely serious

3.If the water's acidity level keeps rising,________.

A. ocean life whose structures contain calcium carbonate may be affected

B. the water's PH value will become higher and higher

C. organisms living near the surface are more sensitive to PH changes

D. some disastrous events will occur more often than before

4.Most experts once believed storing carbon dioxide in the ocean would reduce________.

A. the CO2 absorbed by the ocean         B. the amount of greenhouse warming

C. the acidity of the ocean              D. the gradual release of CO2

高三英语阅读理解中等难度题查看答案及解析