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题型:阅读理解-阅读单选 难度:0.65 引用次数:79 题号:15167465

Race walking (竞走) shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.

Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing(摆动) and one foot remain in contact with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.

Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.

However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.

As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might need to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper techniques, she says. It takes some practice.

1. Why are race walkers conditioned athletes?
A.They must run long distances.B.They have to follow special rules.
C.They are qualified for the marathon.D.They are good at swinging their legs.
2. What advantage does race walking have over running?
A.It’s less likely to cause knee injuries.B.It’s less challenging physically.
C.It’s more effective in body building.D.It’s more popular at the Olympics.
3. What is Dr. Norberg’s suggestion for someone trying race walking?
A.Hiring an experienced coach.B.Having a medical checkup.
C.Getting experts’ opinions.D.Doing regular exercises.
4. Which word best describes the author’s attitude to race walking?
A.Skeptical.B.Supportive.
C.Objective.D.Disapproval.

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【推荐1】Did you know that, in 2016, over 18 million people attended classical concerts in Germany? That’s more people than those who went to main league football matches! Earlier this year, Germany continued its celebration of classical music with the opening of a new concert hall in the heart of Hamburg. Germans are incredibly proud of it and it’s the first thing I show to my friends when they come to visit.
Known as the ‘Elphi’ by the locals, the Elbphilharmonie is a beautiful tower of glittering glass sitting atop an old warehouse by the banks of the river Elbe. The plaza(露天广场)is open to the public an from the middle of the city’s tallest building, you can gaze across the harbour, miles of rooftops and passing ships below.
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Construction began in 2007 with a budget of €241 million and a two-year period. Fast forward ten years, the building eventually opened with a final price tag of over 800 million!
I consider myself very lucky that the Elbphilharmonie opened during my time living in Hamburg, but unfortunately I haven’t yet been able to attend a concert. Everything is sold out for six months! For now, I’m content to visit the plaza to enjoy the impressive view over the docks and see the innovative architecture up close. Hopefully one day soon, I’ll be lucky enough to grab a last-minute concert ticket!
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A.GermanyB.Hamburg
C.A new concert hallD.Its celebration of classical music
2. What is Elbe?
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【推荐2】Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its pitches (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don't need any special equipment except a good pair of trainers; and you don't have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements (代替物) for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it's free.

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Developed by a team in Western Australia, once set up, it links parents to all devices used by their kids—iPhones, iPads and iPods—so that they can direct, block or monitor their Internet time in detail.

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