New research shows that overweight or even mildly obese people have a lower risk of early death than people considered to be normal weight.
Researchers examined the results of 97 studies. Most of the studies were less than 10 years old. They included almost three million adults from around the world, including the United States, Canada, China, Taiwan, Brazil, India and Mexico.
The researchers at the National Center for Health Statistics found that people who are considered overweight or slightly obese were five to six percent less likely to die from all causes than people of normal weight. People with higher obesity ratings, however, had almost a 30 percent greater risk of death compared to normal-weight individuals.
Katherine Flegal was the lead author of the study. She says she was not surprised that overweight people would not have a higher risk of death.
“Because we’d actually already read a lot of this literature and realized it was likely that mortality rates (死亡率) for overweight would be at least not higher than normal weight. I guess I was a little bit surprised that it was definitely lower. And I was also surprised that the lower rates of obesity also didn’t seem to differ from normal weight.”
But she says the difference in death rates appears to be small between normal-weight people and those who are overweight or mildly obese.
The study has raised new questions about “body mass index,”(體重指數(shù)) or BMI. This is a measurement of body fat as a ratio(比率) of height to weight. In recent years, many public health experts have promoted body mass index as a way to predict the risk of health problems. Bu t a person's BMI can be misleading in some cases.
Steven Heymsfield ,the executive director of the Pennington Biomedical Research Center, says people can be physically fit and in good health, but might weigh more because they are more muscular.
Still, Dr. Heymsfield says people should not think gaining extra weight is OK just because of the new findings. He says being at a healthy weight lowers the risk for heart disease and diabetes(糖尿病).
小題1:According to the new findings, the researchers found that __________ .
A.People with high obesity have a lower risk of early death than people with low obesity
B.People with overweight have a greater risk of early death than people of normal weight.
C.People with mild obesity are less likely to die than people of normal weight.
D.People with obesity live much longer than people of normal weight.
小題2:What does the underlined word “l(fā)iterature” in paragraph 6 mean ?
A.works like novels and poems
B.books and articles on a particular subject
C.printed material
D.magazines and newspapers
小題3:Which of the following statements is not true according to the passage?
A.BMI is commonly used to measure body fat as a ratio of height to weight.
B.Not all people with a little higher BMI are fat .
C.Many public health experts encourage more people to use BMI as a way to predict the risk of health problem
D.Because of the ne w findings, people should think about gaining extra weight.

小題1:C
小題2:B
小題3:D

試題分析:一項新的研究表明,體重超標(biāo)甚至是輕微肥胖的人比被認(rèn)為體重正常的人早死的幾率要小。研究人員還提出了新的“體重指數(shù)”,但是同時也指出不能僅靠“體重指數(shù)”來衡量一個人是否健康,也不能因為體重稍微重的人早死幾率低就去增肥。
小題1:C細(xì)節(jié)理解題。從文章開頭New research shows that overweight or even mildly obese people have a lower risk of early death than people considered to be normal weight.可知C項正確。
小題2:B詞意猜測題,前句講“人們實際上已經(jīng)讀過很多這樣的。!。而文章內(nèi)容是講述的是一份調(diào)查研究的內(nèi)容,由此可以推斷l(xiāng)iterature詞意應(yīng)該和research或study等有關(guān)。所以B選項正確。
小題3:D細(xì)節(jié)理解題。從文章最后一段Dr. Heymsfield says people should not think gaining extra weight is OK just because of the new findings.可知D選項內(nèi)容錯誤。
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科目:高中英語 來源:不詳 題型:閱讀理解

Electrical devices(儀器)could soon use power make by human energy, Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device.
The device connects to a person’s knee, As the person walks, the device captures energy each time the person slows down, To do this ,the device helps with the slowing sown movement of the leg, The movements of the walking person push parts of a small machine that produces electricity, Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute, Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.
There are several possible uses for the device ,Developers say it could help people who work in areas without electricity to operate small computers, The deice could also be used in hospitals to operate heart pacemakers(起博器),It could even be used to assist in the movement of robotic arms and legs.
The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, But the researchers hope to make a lighter, less costly version.An improved version should be ready in one year.
The developers hope the device will one day help developing countries, Nearly twenty five percent of people around the world live without electric power.
A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania,He created a bag carried on a person’s back that also produces power from walking, The knee device does not produce as much electricity as the bag ,But the bag requires the walker to carry a load of twenty to thirty kilograms.
小題1:The second paragraph mainly talks about       .
A.who developed the device
B.how the device works
C.several possible uses for the devices
D.how much electricity the device can produce
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A.It is too heavy for the walker to bear
B.It is too complex for people to use
C.It is too expensive for most people to afford
D.It will slow down one’s walking speed.
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A.produces power without adding more loads to the walker
B.can produce more power in a much shorter time
C.needs to be equipped with a battery
D.can help the walker walk faster
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A.help housewives operate the washing machine
B.make it much easier for us to go online
C.produce more electricity than that invented by Larry Rome
D.be applied in medicine to operate heart pacemakers
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A.First device powered by walking will soon be on the market
B.Advanced technology brings in a new way to operate heart pacemakers
C.Device gives new meaning to the idea of power walking
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“After a while,we figured out that probably the best way is to go for a mass-market way,” says Gaze’s Sune Alstrup Johansen.“where everybody would have this available."
Johansen and some of his colleagues have formed a new company,the Eye Tribe,which is hoping to develop the technology on a mass commercial level.
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“Our software can then determine the location of the eyes and know where you’re looking on the screen to make sure what you’re looking at,“reads an explanation on the Eye Tribe site.
There has been a gradual change toward hands-free technology in recent years, particularly in the gaming world.Recently Xbox released the Kinect device,which lets users control their Xbox and play certain games using only their hands,legs and voices. But still,most of these devices have been more of a gimmick than a practical way to use one’s hands to control a mobile device.Johansen said a replaceable filter(濾光器)would be a cheap,convenient way for most consumers.
And even as companies like The Eye Tribe work to create such a product for the average user, making the eye-controlled technology more accessible and less expensive will have similar benefits for physically disabled users.
For more articles on modern science,please CLICK here.
小題1:Which of the following is the main idea of the passage?
A.An introduction of a new device.
B.An introduction of smart-phones.
C.An introduction of eye-controlling technology.
D.An introduction of a new technology for the disabled.
小題2:The underlined word“gimmick” probably means         .
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小題3:According to the passage,we can learn that      .
A.the eye-controlling technology was first developed for the blind
B.the present developing 0f the technology will bring no good
C.there is no such a phone as we can use only with our eyes at present
D.the eye-controlling technology is only intended for the disabled people
小題4:This passage is probably taken from         .
A.a(chǎn)n experiment report B.a(chǎn) science fiction
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