Question

            C  ★★★★☆

    Looking for a simple way to bum more calories while walking? Researchers found that walking at varying speeds can bum up to 20 percent more calories. It is one of the first to measure the calories burned at various walking speeds. “Most of the existing literature has been on constant-speed walking. This study is a bi^ missing piece,” said Manoj Srinivasan,co-author of the study. “Measuring the calories burned while changing speeds is very important — people don’t live their lives on (跑步机) and do not walk at constant speeds."

    The researchers found that up to thirty percent of the energy we use during normal daily walking could be due to the energy needed to start and stop walking. Walking at any speed costs some energy,bilt when you* re changing the speed, ?ou will get the biggest effect. Changing the kinetic (运动的) energy of a person requires more work from the legs and that process certainly bums more energy.

    The study also confirmed the researchers’ prediction that people walk slower when covering shorter distances and increase their paces as distance increases. This finding could have some effects in the field of health,where the speed measured within a certain distance is used as a sign of a patient's progress. “What we’ve shown is that the distance over which you make them walk matters,” said Srinivasan. You’11 get different walking speeds for different distances.”

    For more tips on how to bum more calories when walking,Srinivasan offers some simple advice: walk in a way that feels unnatural. “How do you walk in a manner that bums more energy? Just do weird things. Walk with a backpack,walk with weights on your legs or walk in a curve as opposed to a straight line,” he said.

9. Why does research on walking and changing speeds matter?

   A. It can save lots of energy.

   B. It's good for the environment.  

    C. It can help build up our bodies.

   D. It's close to the way people walk in everyday life.

10. The second paragraph serves as .

   A. an explanation for the study

   B. the background of the study 

    C. an example of the study

   D. an introduction to the study

11. When patients change the speed of walking,.

   A. they are in poor health

   B. they are likely to recover 

    C. they have weight problems 

    D.they may need more walking practice 

12. What does the underlined word “weird” in Paragraph 4 probably mean?

   A. Boring.   B. Strange,

    C. Great.   D. Right. 

Answer 1

C篇  变换步行速度能燃烧更多脂肪。

9.D.推理判断题。根据第一段中的people don’ t live their lives on treadmills and do not walk at constant speeds可知，变化的速度更接近 人们平时走路的规律。

10.A.写作手法题。第二段主要是对第一段所 提出的研宄结果提供了解释，故A项符合题

11.B.推理判断题。根据第三段中的the speed measured within a certain distance is used as a sign of a patient's progress 可知，变化的步行速 度可以反映患者恢复程度。

12.B.词义猜测题。根据最后一段中的Walk in a way that feels unnatural和划线单词后所列举 的例子可知，划线单词应该是“奇怪的”的意 思。