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 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.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 |
The underlined word “modest” in Paragraph 3 most probably means.
| A．relatively high | B．extremely low |
| C．relatively low | D．extremely high |
What can we learn from the text?
| 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. |
IELTS: international English language testing system
Introduction: The IELTS is jointly managed by the University of Cambridge Local Examination Syndicate (剑桥大学考试委员会), the British Council (英国文化委员会) and IDP Education Australia (澳洲教育国际开发署)
Why more and more people are taking the IELTS test?
The IELTS test is widely recognized by the colleges, universities and other academic institutions of Australia, New Zealand, Canada and the United Kingdom. More and more universities and colleges in the US are also accepting an IELTS result as a language requirement for application to degree courses.
IELTS is accepted by many important organizations, such as the New Zealand Immigration Bureau, the Australian Immigration and Cultural Department, the Canadian Immigration Bureau, the Australian Medical Council and the British Medical Association (总会).
Choice of two test types
There are two test models: Academic and General Training. The candidate must select the one suitable to his/here purpose for taking the test.
Academic: for candidates who want to apply for undergraduate or postgraduate courses.
General Training: for candidates who take IELTS for immigration purpose, training programmes, or work experience.
If you have any questions about which type to take, consult the Examinations Services staff at the British Council offices.
Content
The test is composed of four papers: Listening, Reading, Writing and Speaking. The first three papers must be taken at one sitting on one day, and the speaking paper may be taken up to two days later. Usually in China, the Listening paper is taken on a Saturday morning, followed by the Reading paper, and then Writing paper. The Speaking test is usually taken on the Saturday afternoon or on the following Saturday. Candidates must complete all four papers in order to obtain an overall score.How many organizations is IELTS managed by?
| A．6. | B．5. | C．4. | D．3. |
Why are more and more people taking the IELTS test?
| A．It is widely accepted by many countries. |
| B．It is widely recognized by many colleges, institutions and many important organizations. |
| C．It’s proof for people’s ability. |
| D．It’s interesting and acceptable. |
What kind of candidates should choose Academic test?
| A．Candidates who want for immigration. |
| B．Candidates who want for training. |
| C．Candidates who want for work experience. |
| D．Candidates who want for undergraduate or postgraduate courses. |
In China, what’s the test order?
| A．Reading, writing, speaking, listening. |
| B．Reading, speaking, listening, writing. |
| C．Listening, reading, writing, speaking. |
| D．Speaking, reading, listening ,writing |
Flying over a desert in an airplane, two scientists looked down with trained eyes at trees and bushes．After an hour’s flight, one of the scientists wrote in his notebook, "Look here for probable metal." Walking across hilly ground, four scientists reported, "This ground should be searched for metals." From an airplane over a hilly wasteland a scientist sent back by radio one word "Uranium".
None of the scientists had X-ray eyes: they had no magic powers for looking down below the earth’s surface．They were merely putting to use one of the newest methods of locating minerals in the ground -- using trees and plants as signs that certain minerals may lie under the ground on which the trees and plants are growing.
This newest method of searching for minerals is based on the fact that minerals deep in the earth may affect the kind of bushes and trees that grow on the surface.
At Watson Bar Creek, a mineral search group gathered bags of tree seeds．Boxes were filled with small branches from the trees．Roots were dug and put into boxes．Each bag and box was carefully marked．In a scientific laboratory the parts of the forest trees were burned to ashes and tested．Each small part was examined to learn whether there were minerals in it.
Study of the roots, branches and seeds showed no silver．But there were small amounts of gold in the roots and a little less gold in the branches and seeds．The seeds growing nearest to the tree trunk had more gold than those growing on the ends of the branches.
If the trees indicated that there was no gold in the ground, the scientists wouldn’t spare money to pay for digging into the ground.Scientists were flying over a desert or a hilly wasteland or a mountain region to _____.
| A．train their eyes | B．study the trees |
| C．look for gold | D．search for minerals |
The study of trees, branches and roots indicated that ______.
| A．there were larger amounts of gold in the branches far from the tree trunk than in the seeds |
| B．there were smaller amounts of gold in the tree roots deep in the ground than in the branches |
| C．there were larger amounts of gold in the seeds growing closer to the tree trunk than in the seeds farther from it |
| D．there were larger amounts of gold in the branches than in the leaves on the ends of the branches |
Which of the following is NOT mentioned as part of a tree that can help the searchers?
| A．leaves | B．roots | C．branches | D．seeds |
Which of the following might be the best title for this passage?
| A．Scientists searching for treasure with special equipment. |
| B．New methods of doing geological study. |
| C．Gold could be found in trees and plants. |
| D．A new method of searching for minerals. |
I made a pledge (发誓) to myself on the way down to the vacation beach cottage. For two weeks I would try to be a loving husband and father. Totally loving. No ifs, ands or buts.
The idea had come to me as I listened to a talk on my car radio. The speaker was quoting a Biblical (圣经) passage about husbands being thoughtful of their wives. Then he went on to say, “Love is an act of will. A person can choose to love.” To myself, I had to admit that I had been a selfish husband. Well, for two weeks that would change.
And it did. Right from the moment I kissed Evelyn at the door and said, “That new yellow sweater looks great on you.”
“Oh, Tom, you noticed,” she said, surprised and pleased. Maybe a little puzzled.
After the long drive, I wanted to sit and read. Evelyn suggested a walk on the beach. I started to refuse, but then I thought, “Evelyn’s been alone here with the kids all week and now she wants to be alone with me.” We walked on the beach while the children flew their kites.
So it went. Two weeks of not calling the Wall Street firm where I am a director; a visit to the shell museum though I usually hate museums. Relaxed and happy, that’s how the whole vacation passed. I made a new pledge to keep on remembering to choose love.
There was one thing that went wrong with my experiment, however. Evelyn and I still laugh about it today. On the last night at our cottage, preparing for bed, Evelyn stared at me with saddest expression.
“What’s the matter?” I asked her.
“Tom,” she said in a voice filled with distress, “do you know something I don’t?”
“What do you mean?”
“Well… that checkup I had several weeks ago… our doctor… did he tell you something about me? Tom, you’ve been so good to me… am I dying?”
It took a moment for it all to sink in. Then I burst out laughing.
“No, honey,” I said, wrapping her in my arms. “You’re not dying; I’m just starting to live.”In the first paragraph, “No ifs, ands or buts” probably mean ________.
| A．unnecessarily | B．unconditionally | C．impossibly | D．unintentionally |
From the story we may infer that Tom drove to the beach cottage ________.
| A．alone | B．with his family | C．with Evelyn | D．with his children |
During the two weeks on the beach, Tom showed more love to his wife because ________.
| A．she looked lovely in her new clothes |
| B．she was seriously ill |
| C．he was determined to be a good husband |
| D．he had made a lot of money in Wall Street |
By saying “I’m just starting to live,” Tom means that ________.
| A．he is beginning to feel regret for what he did to his wife before |
| B．he lived an unhappy life before and is now starting to change |
| C．he is just beginning to understand the real meaning of life |
| D．he is just beginning to enjoy life as a loving husband |
Professor Reason recently persuaded 35 people to keep a diary of all their absent-minded actions for two weeks. When he came to analyze their embarrassing errors, he was surprised to find that nearly all of them fell into a few groups.
One of the women, for instance, on leaving her house for work one morning threw her pet dog her earrings and tried to fix a dog biscuit on her ear. “The explanation for this is that the brain is like a computer,” explains the professor. “People programme themselves to do certain activities regularly.” It was the woman’s custom every morning to throw her dog two biscuits and then put on her earrings. “But somehow the action got reversed（颠倒）in the programme.” About one in twenty of the incidents the volunteers reported were these “programme assembly failures.”
Twenty percent of all errors were “test failures” — mainly due to not verifying the progress of what the body was doing. A man about to get his car out of the garage passed through the back yard where his garden jacket and boots were kept, put them on — much to his surprise. A woman reported, “I got into the bath with my socks on.”
The commonest problem was information “storage failures”. People forgot the names of people whose faces they knew, went into a room and forgot why they were there, mislaid something, or smoked a cigarette without realizing it.
The research so far suggests that while the central processor of the brain is liberated from second-to-second control of a well-practiced routine, it must repeatedly switch back its attention at important decision points to check that the action goes on as intended. Otherwise the activity may be gotten by another frequently and recently used programme, resulting in embarrassing errors.The purpose of the professor’s research is to __________.
| A．show the difference between men and women |
| B．sort and explain some errors in human actions |
| C．find the causes which lead to computer failures |
| D．compare computer functions with brain working |
Which of the following might be grouped under “programme assembly failures”?
| A．A woman went to a shop and forgot what to buy. |
| B．A man returning home after work left his key in the lock. |
| C．A lady fell as she was paying attention to each step her feet were taking. |
| D．An old man, with his shoes on, was trying to put on his socks. |
The underlined word “verifying” (in paragraph 3) can be replaced by “_______”.
| A．improving | B．changing | C．checking | D．stopping |
According to the passage, the information “storage failure” refers to “_______”.
| A．information collecting system being destroyed |
| B．one’s total memory being removed |
| C．the loss of part of one’s memory for a time |
| D．the separation of one’s action from words |
| You are here: Experts > Science > Science/Nature for Kids > Science for Kids > Life Science for teens<> |
| Expert: Science Adviser - <>3/21/2011 |
| QUESTION: Dear Marie, Do you have some good suggestions of biology: plant, animal, human science experiments that would work well with teenagers? Scientific methods must go with the experiments. Thanks! < Donna ANSWER: Dear Donna, Marie is not online and I’ll help you instead of him. There are a lot of little things that can be done, but do you mean lab experiment or statistical analysis, etc.? Let us know what can be suitable for you teens, and we will do our best to send you some experiments to do. Best， Gloria |
| Expert: Science Adviser - 3/23/2011 |
| QUESTION: Dear Gloria, I need lab experiments. The teenage students and I will use data from these experiments to make charts, graphs, tables, etc. and to provide claims and evidence to explain more about the results. Thank you very much. Donna ANSWER: Hi there, Your best and easiest way is to do some chemistry experiments. Those are very easy and most probably you can do it in the lab and have charts, etc. for you. I do not have any particular one at the top of my head because I do cancer research and it is a bit more difficult than research for teenagers. I think you can look through these and see if you find something useful for you. http://www.siraze.net/chemistry/sezennur/experiments.htm If not, get back to me and Marie, and we’ll look more. The good thing about this site is that it has the procedures that you can follow. Good luck， Gloria |
How many Science Advisers are there working for this website?
| A．Only one. | B．At least two. | C．About three. | D．Over five. |
According to Donna, she and the teenage students need ___________.
| A．experiments in the lab | B．statistical analysis |
| C．chemistry experiments | D．charts and evidence |
Who is this text for?
| A．Teenagers. | B．Teachers. | C．Parents. | D．Experts. |
According to Gloria, Donna and the teenage students should __________.
| A．turn to others for help | B．do cancer researches |
| C．look through a website | D．tell who will be helped |