Electrical devices(仪器)could soon use power made 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 down 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 device could also be used in hospitals to operate heart pacemakers(起搏器). 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 shou1d be ready in one year.

The developers hope the device will one day help developing countries. Near1y 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 wa1king.

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.

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

2.What is the disadvantage of the experimental version of the device?

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.

3.Compared with the device designed by Larry Rome, this new device      .

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 wa1k faster

4.From the passage, we can learn that the electrical device can      .

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

5.What would be the best title for the passage?

A. First device powered by walking wi1l 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

D. Human energy will become a main source of electricity

 

Electrical devices(仪器)could soon use power made 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 device could also he 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.

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

2.. What is the disadvantage of the experimental version of the device?

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

3.. Compared with the device designed by Larry Rome, this new device     

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

4.. From the passage, we can learn that the electrical device can     

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 medical fields to operate heart pacemakers

5.. What would be the best title for the passage

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

D Human energy will become a main source of electricity

 

 阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

    Kevin was eagerly waiting for his holiday. His mother kept on saying there would be a big   36  for him during the holiday. The exams were just over and summer vacation just started. Now Kevin was   37   like a bird.

       Suddenly the   38   rang. It was his cousin, Max. “Hi!” screamed Max as he jumped on to Kevin’s bed   39   his crayons (蜡笔) during the process. “I’ve come to stay here for the holidays.”

       Kevin never expected his mother’s surprise to be so   40  . After breakfast Kevin   41   to do some painting.   42   Max was not around. When he was doing the finishing touches, Max entered and spilled some juice all over the painting,   43   ruining it.

       The next day was even   44   for him.

       It all   45   when Max put the dirty clothes in the washing machine. After some time Kevin heard some   46   sounds from the machine and he found that Max had put his shoes into the machine. One day, a piece of   47   caught Kevin’s attention. “The world famous collector Dick Brown’s stamps have been   48  .”

       Kevin had a stamp collection and it was with his friend Allan. So, Kevin gave Max the   49   and sent him to get his album back. Max soon came back with the album and Kevin found it was not his album --- it   50   valuable stamps. Actually Max had gone to another   51   whose door was unlocked by mistake and found an album which resembled Kevin’s and brought it back. Kevin   52   that it might be the album belonging to Dick Brown. Kevin called the   53   and told them he had found a valuable album. A week had passed since that incident, and Kevin and Max were   54   for finding Dick Brown’s album.

       “I’ll never be   55   with Max,” Kevin thought.

36. A. challenge            B. surprise            C. chance                  D. worry

37. A. anxious               B. puzzled             C. free               D. curious

38. A. mobile phone      B. doorbell            C. clock                   D. landline

39. A. breaking              B. seeking             C. removing           D. taking

40. A. hard                   B. small                C. late                  D. bad

41. A. asked                  B. stopped            C. recommended   D. decided

42. A. Simply                B. Frankly             C. Luckily             D. Strangely

43. A. roughly              B. totally               C. gradually          D. eventually

44. A. better                  B. happier              C. longer               D. worse

45. A. started                B. mattered            C. worked            D. changed

46. A. familiar              B. strange             C. lovely               D. worse

47. A. research             B. advice              C. news               D. advertisement

48. A. sold                   B. stolen               C. exchanged               D. exhibited

49. A. address               B. number             C. photo                      D. name

50. A. offered               B. showed            C. mentioned         D. contained

51. A. store                  B. office                      C. house               D. club

52. A. expected            B. suspected         C. imagined           D. believed

53. A. owner                B. friend               C. cousin              D. police

54. A. rewarded            B. punished           C. found               D. scolded

55. A. strict                  B. angry                      C. honest              D. happy

Kevin was eagerly waiting for his holiday. His mother kept on saying there would be a big   36  for him during the holiday. The exams were just over and summer vacation just started. Now Kevin was   37   like a bird.

       Suddenly the   38   rang. It was his cousin, Max. “Hi!” screamed Max as he jumped on to Kevin’s bed   39   his crayons (蜡笔) during the process. “I’ve come to stay here for the holidays.”

       Kevin never expected his mother’s surprise to be so   40  . After breakfast Kevin   41   to do some painting.   42   Max was not around. When he was doing the finishing touches, Max entered and spilled some juice all over the painting,   43   ruining it.

       The next day was even   44   for him.

       It all   45   when Max put the dirty clothes in the washing machine. After some time Kevin heard some   46   sounds from the machine and he found that Max had put his shoes into the machine. One day, a piece of   47   caught Kevin’s attention. “The world famous collector Dick Brown’s stamps have been   48  .”

       Kevin had a stamp collection and it was with his friend Allan. So, Kevin gave Max the   49   and sent him to get his album back. Max soon came back with the album and Kevin found it was not his album --- it   50   valuable stamps. Actually Max had gone to another   51   whose door was unlocked by mistake and found an album which resembled Kevin’s and brought it back. Kevin   52   that it might be the album belonging to Dick Brown. Kevin called the   53   and told them he had found a valuable album. A week had passed since that incident, and Kevin and Max were   54   for finding Dick Brown’s album.

       “I’ll never be   55   with Max,” Kevin thought.

36. A. challenge            B. surprise            C. chance                  D. worry

37. A. anxious        B. puzzled             C. free                  D. curious

38. A. mobile phone      B. doorbell            C. clock                   D. landline

39. A. breaking              B. seeking             C. removing             D. taking

40. A. hard                   B. small         C. late                     D. bad

41. A. asked                  B. stopped            C. recommended   D. decided

42. A. Simply         B. Frankly             C. Luckily                D. Strangely

43. A. roughly              B. totally               C. gradually          D. eventually

44. A. better                  B. happier              C. longer               D. worse

45. A. started         B. mattered            C. worked               D. changed

46. A. familiar              B. strange             C. lovely                  D. worse

47. A. research             B. advice              C. news                  D. advertisement

48. A. sold                   B. stolen               C. exchanged               D. exhibited

49. A. address        B. number             C. photo                      D. name

50. A. offered        B. showed            C. mentioned         D. contained

51. A. store                  B. office               C. house                  D. club

52. A. expected            B. suspected C. imagined           D. believed

53. A. owner         B. friend               C. cousin                D. police

54. A. rewarded            B. punished    C. found                 D. scolded

55. A. strict                  B. angry               C. honest                D. happy

Charging your mobile phone might soon be as simple as taking a walk around the block. Scientists have created a new machine that harvest energy from the movement of the knees while walking. Six volunteers wore the devices（装置）on their legs while walking on a treadmill（跑步机）and were able to produce about five watts of electrical power each. That’s enough energy to run 10 mobiles at the same time.

“Since muscles are the powerhouses of the body, my colleagues and I designed our device to generate electricity from the move of the knee joint,” said Max Donelan. “It resembles a knee brace and weighs about 1.5 kilograms including the gearing（传动装置）and generator.”

The apparatus（装置）catches the energy of a person’s movement by connecting an electrical generator to knee moving. When the wearer extends the knee, a gear on the device turns and spins the generator, which builds up energy. When the knee is flexed, the device turns off so as not to tax the wearer. The machine senses moving and knows when to activate itself.

The design allows a person to use the tool without using much additional energy beyond the normal demands of walking. The researchers measured the volunteers’ oxygen intake and carbon-dioxide output to make sure it wasn’t strenuous to use.

People are an excellent source of portable power. An average-sized person stores as much energy in fat as a 1,000-kilogram battery. People recharge their body batteries with food.

The device could be used to power computers in remote areas where electricity is short. The early markets are people whose lives depend on portable power, such as people with artificial limbs (肢体). On the military side, some soldiers have an extreme dependence on batteries these days, so both these groups could benefit.

1．The text is mainly about a new machine that          .

       A．can make your walking easy on a treadmill

       B．can generate enough electricity by walking

       C．can increase the strength of your walking

       D．can offer electricity for your physical practice

2．According to the text, which parts of the body are suitable for the device?

       A．The knees.          B．The ankles.          C．The wrists.          D．The neck.

3．It can be inferred from the text that the amount of electricity from the device directly lies in          .

       A．the speed of your walking                     B．the amount of food you eat

       C．the amount of oxygen intake                 D．the extent of your knees extending

4．Why did the researchers measure the volunteers’ carbon-dioxide output?

       A．To see whether the device is hard to use.

       B．To test the amount of electricity generated.

       C．To tell whether the device has enough source of energy.

       D．To judge what food is useful for the wearers.

5．We can learn from the text that the device          .

       A．is a must for a soldier in the army

       B．will more and more change people’s ways of life

       C．has widely been used in remote areas

       D．is more useful in places with electricity unaccessible