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.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
3.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
4.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
1.B
2.A
3.D
4.C
【解析】
试题分析：文章主要介绍了一种新的发电装置。科学家研制出了一种通过捕捉人们行走的动作来发电的装置。这种装置被绑在人们的膝盖上，在行走的过程中，每当人们的脚步放缓时，装置就会捕捉人体释放的能量。
1.1】段落大意题。根据第二段“The device connects to a person’s knee. As the person walks, the device captures energy each time the person slows down.”可知，第二段主要讲的是这种装置是如何工作的，故选B。
2.2】细节理解题。根据倒数第二段“He created a bag carried on a person’s back”和最后一段“But the bag requires the walker to carry a load of twenty to thirty kilograms”可知，Larry Rome设计的装置需要在背上放二十到三十千克的袋子，而新的仪器则不需要使用者负重行走，故选A。
3.3】推理判断题。A项未提及；根据第三段“it could help people who work in areas without electricity to operate small computers”可知，发的电可以为小型电脑提供电能，排除B；根据最后一段“The knee device does not produce as much electricity as the bag.”排除C；根据第三段“The device could also be used in hospitals to operate heart pacemakers(起搏器).”可知，这种装置可以用来运行心脏起搏器，故选D。
4.4】选择最佳标题。第一个用行走来发电的装置是Larry Rome在2005年发明的，排除A；根据第三段“There are several possible uses for the device.”可知，通过行走发的电用于运行心脏起搏器只是用途之一，B项太片面，排除B；通过人的运动所发的电是有限的，不可能成为主要的电力来源，排除D，故选C。
考点：科技类短文阅读
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