题目
题型：不详难度：来源：
In the first stage of our lives, we develop and grow, reaching toward the top of physical vitality (活力,生气).
After we grow up, however, the body begins a process of gradually wearing out.
A new awareness of physical fitness may help lengthen our years of health and vitality, yet nothing we do will work to stop the unavoidable force of aging.
Most of the changes of aging take place deep inside the body. The lungs become less able to take in oxygen. Powerful muscles gradually lose their strength. The heart loses power and pumps less blood. Bones grow easier to break.
Finally, we meet a stress, a stress that is greater than our physical resistance. Often, it is only a minor accident or chance infection (a disease caused by virus), but this time, it brings life to an end.
In 1932, a classic experiment nearly doubled the lifetime of rats, simply by cutting back the calories in their diet. The reason for the effect was then unknown.
Today, at the University of California at Berkley, Dr. Paul Seagle has also greatly lengthened the normal lifetime of rats. The result was achieved through a special protein limited diet, which had a great effect on the chemistry of the brain. Seagle showed that within the brain, specific chemicals control many of the signals that influence aging. By changing that chemical balance, the clock of aging can be reset.
For the first time, the mystery of why we age is being seriously challenged. Scientists in ma
ny fields are now making striking and far-reaching discoveries.An average lifetime lasts 75 years, yet in each of us lies a potential for a longer life. If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years.
小题1: What does the underlined word “it” refer to?
| A．Physical vitality. | B．Stress. | C．Aging. | D．Physical resistance. |
| A．The lungs become unable to take in oxygen. |
| B．People gradually lose their muscle strength. |
| C．The heart loses power and pumps less blood. |
| D．Bones tend to break more easily. |
| A．human’s life pattern is predictable |
| B．physical fitness can’t stop the force of aging |
| C．human’s lifetime will last longer than 75 years |
| D．all of the changes of aging take place deep inside the body |
| A．By limiting the protein in their diet. | B．By cutting the calories in their diet. |
| C．By resetting their clock of aging. | D．By keeping their physical fitness. |
| A．Two Great Experiments | B．The Mystery of Human Life |
| C．Ways to lengthen Human Life | D．The Breakthrough in the Study of Aging |
答案
小题1:B
小题1:A
小题1:D
小题1:A
小题1:D
解析
核心考点
试题【Like distance runners on a measured course, all of us will move through time in 】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Some weight-loss camps, which are rare in China just a few years ago, have sprouted in Beijing, Qingdao, Shenzhen, and other cities. Today about 15 percent of adults, or 200 million Chinese, are reportedly overweight. Of these, 90 million—about 7 percent—are obese（极肥胖的）.
Experts say the obesity epidemic is spreading to children, though more slowly than in adults. The trend, they say, will have a huge impact on the health of China’s citizens and economy. “We’re seeing a very large proportion of children and adolescents who are quite heavy and aren’t moving much,” said Barry Popkin, a nutrition professor. Popkin carries out an ongoing health-and-nutrition survey of 16,000 households in China. He says more kids today are overeating and putting on weight “quite quickly.” In just ten years, China’s childhood obesity rate has doubled, with the greatest gains coming in urban areas. “In big cities it’s a big problem.”
Some experts blame the extra fat on a range of factors, many of them tied to China’s rapidly changing economy and culture. The diets of Chinese adults and children are far higher in calorie-laden meats, fish, eggs, dairy products, fats, and sugars than ever before. In addition, kids—especially city dwellers—are more sedentary today and spend more time indoors in front of homework, television, computer games, and the Internet.
Shuwen Ng, a health economist, says that kids in China now have pocket money, and they spend a portion of it on junk food. Ng adds that advertising and peer groups influence kids’ food choices. Certain foods, such as new candies or fast food, have attractive features.
China’s childhood obesity rate still lags that of the United States, where some 15 percent of kids are said to be obese. But the long-term effects are equally serious.
小题1:According to the passage we know _____.
| A．weight-loss camps have been very popular in China six years ago |
| B．about 290 million Chinese are overweight in China in all |
| C．in China childhood obesity rate in rural areas is lower than that in major cities |
| D．America’s childhood obesity rate is lower than China’s |
| A．Advertising on some new candies | B．High quality diets |
| C．Playing computer games for long time | D．Having pocket money |
| A．attentive | B．earnest | C．absent | D．inactive |
| A．obesity explosion in China will affect the United States |
| B．there is great difference in kids’ food choices now |
| C．junk food contributes to childhood obesity |
| D．city children eat more than rural children |
| A．Chinese Childhood Obesity Explosion |
| B．Weight-loss Camps in China |
| C．Obesity Explosion’s Impacts On Chinese Economy |
| D．Obesity Explosion In China And America |
In general，single-letter prefix have been popular since the 1990s，when terms such as e-mail and e-commerce first came into use.
Most “i”products are targeted at young people and considering the major readers of the Independent’s “i”，it’s no surprise that they’ve selected this fashionable name.
But it’s hard to see what’s so special about the letter “i”.Why not use “a”，“b”or “c”instead？According to Tony Thorne，head of Language Center at King’s College，London，“i”works because its meaning has become ambiguous .When Apple uses “i”，no one knows whether it means internet，information，individual or interactive，Thorne told BBC magazines “even when Apple created the iPod，it seems it didn’t have one clear definition，”he says.
“However，thanks to Apple，the term is now associated with portability （轻便）， ”adds Thorne.
Clearly the letter “i”also agrees with the idea that the Western World is centered on the individual. Each person believes they have their own needs，and we love personalized products for this reason.
Along with “Google”and “blog”，readers of BBC magazines voted “i”as one of the top 20 words that have come to define the last decade.
But as history shows，people grow tired of fads. From the 1900s to the 1990s，products with “2000”in their names became fashionable as the year was associated with all things advanced and modern. However，as we entered the new century，the trend inevitably disappeared.
小题1:
We can infer that the Independent’s “i”is aimed at _______.
| A．young readers | B．old readers | C．fashionable women | D．engineers |
How to Be Prepared
Electricity, water, gas and telephones may not be working after an earthquake. The police and fire departments are likely to be tied up. You should be prepared to fend for yourself at least three days,preferably for a week. You’ll need food, water and so on. It’s also a good idea to decide ahead of time how and where your family will reunite if separated during a quake. You might choose an out-of-the-area friend or relative that family members can call to check on you.
________
If you’re indoors, stay there. Get under a desk or table. The kitchen is a particularly dangerous spot. If you’re in an office building, stay away from windows and outside walls and do not use the elevator. If you’re outside, get into the open. Stay clear of buildings, power lines or anything else that could fall on you. If you’re driving, move the car out of traffic and stop. Avoid parking under or on bridges or overpasses.
After an Earthquake
Check for fire. If you smell gas, shut off the main gas valve(阀). If there’s sign of damage to electricial wiring, shut off the power at the control box. If the phone is working, only use it in case of emergency(紧急情况). Avoid driving if possible to keep the streets clear for emergency vehicles. Be careful that things may fall out of cupboards when the door is opened, and also that chimneys can be weakened and fall with just a touch. Listen to the radio for important information and instructions. Remember that aftershocks, sometimes large enough to cause damage in their own right, generally follow large quakes. If you leave home, leave a message telling your friends and family your location.
小题1:
The underlined phrase“tend for’’ in the second paragraph probably means“ ________’’
| A．look for | B．take care of | C．be proud of | D．think of |
Which of the following would be the best subtitle for the third paragraph?
| A．Before an Earthquake | B．After Making Preparations |
| C．While Staying at Home | D．During an Earthquake |
What should you do when an earthquake happens?
| A．You should stay away from the kitchen. |
| B．You should drive on a bridge. |
| C．You should turn off the power. |
| D．You should listen to the radio frequently. |
What will probably happen after a big earthquake?
| A．The local people’s life will return to normal in a week. |
| B．There will be more earthquakes in a short time. |
| C．There won’t be any earthquakes in a short time. |
| D．The local people will stay at home waiting for help. |
The car is made mainly of renewable materials, like plants and vegetables. The structure around the car is made from natural plant fibers and potatoes. The steering wheel(方向盘) is made from root vegetables like carrots. The engine uses bio-fuel made from vegetable oil and waste chocolate.
The new racing car is extremely fast. The car has a top speed of two hundred fifteen kilometers an hour. And it can go from zero to ninety-five kilometers an hour in just two and a half seconds. The racing car meets all of the Formula Three racing requirements except for its biodiesel(生物柴油) engine.
Automobile racing is one of the most widely watched sports in the world. But it is also considered one of the least friendly sports to the environment. Racing cars burn a lot of fuel, and create a lot of air pollution. In recent years, the racing industry has taken steps to protect the environment. More racing companies are now producing cars that use less energy. These cars produce less pollutio
n than cars that depend on traditional fuel, like gasoline.Last month, the new racing car was set to run in its first competitive race at the Formula Three Championship Final at Brands Hatch. It would have been the first biodiesel-powered car to race at Formula Three. Current Formula Three rules let only gasoline-powered car to compete. Officials needed permission from all of the Formula Three racers for the biodiesel-powered car to compete. They were unable to contact one of the drivers, so the new racing car didn’t appear in the event. In test runs, the new racing car was the fifth fastest among the Formula Three race cars. Supporters are hoping to have the fuel problem solved in time to compete in the next season.
小题1:. What’s the second paragraph mainly about?
| A．What materials the new racing car is made of. |
| B．Why researchers built the new racing car. |
| C．The characteristics of the new racing car. |
| D．The process of the new racing car being designed. |
requirements.
| A．speed | B．appearance | C．weight | D．engine |
| A．the new racing car is the first environmentally friendly car |
| B．automobile racing could be forbidden in the near future |
| C．many people like to watch automobile racing |
| D．the new racing car will be allowed to compete in the next season of Formula Three racing |
| A．burn more fuel | B．go more quickly |
| C．produce less pollution | D．cost less money |
| A．Because the new racing car still needs testing. |
| B．Because officials needed each racer’s permission but failed to contact one. |
| C．Because there’re some technical problems to be solved. |
| D．Because few drivers think it is fast enough. |
Joan Mclean think so. In fact, Mclean, a professor of physics at Mountain University in Range, feels so strongly about this matter that she’s developed a course on the topic. In addition to learning “who” invented “what”, however, Mclean also likes her students to learn the answers to the “why” and ”how” questions. According to Mclean,” When students learn the answers to these questions, they are better prepared to recognize opportunities for inventing and more motivated to give inventing a try.”
So, just what is the story behind the windshield wiper? Well, Mary Anderson came up with the idea in 1902 after a visit to New York City. The day was cold and stormy, but Anderson still wanted to see the sights, so she jumped aboard a streetcar. Noticing that the driver was struggling to see through the snow covering the windshield, she found herself wondering why there couldn’t be a built-in device for cleaning the window. Still wondering about this when she returned home to Birmingham, Alabama, Anderson started drafting out solutions. One of her ideas, a lever(操作杆)on the inside of a vehicle that would control an arm on the outside, became the first windshield wiper.
Today we benefit from countless inventions and innovations，It’s hard to imagine driving without Garrett A. Morgan’s traffic light. It’s equally impossible to picture a world without Katherine J. Blodgett’s innovation that makes glass invisible, Can you picture life without clear windows and eyeglasses?
小题1:By mentioning “traffic light” and “windshield wiper”, the author indicates that countless inventions are .
| A．beneficial, because their inventors are famous |
| B．beneficial, though their inventors are less famous |
| C．not useful, because their inventors are less famous |
| D．not useful, though their inventors are famous |
| A．add colour and variety to students’ campus life |
| B．inform students of the windshield wiper’s invention |
| C．carry out the requirements by Mountain University |
| D．prepare students to try their own invention |
| A．not eventually accepted by the umbrella producer |
| B．inspired by the story behind the windshield wiper |
| C．due to his dream of being caught in a rainstorm |
| D．not related to Professor Joan McLean’s lectures |
A How to Help Students to Sell Their Inventions to Producers?
B How to Design a Built-in Device for Cleaning the Window?
C Shouldn’t We Know Who Invented the Windshield Wiper?
D Shouldn’t We Develop Invention Courses in Universities?
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