Electrical devices（仪器）could soon use power make 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 puter 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 puters. The device could also be 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.
【小题1】The second paragraph mainly talks about .A．who developed the deviceB．how the device worksC．several possible uses for the devicesD．how much electricity the device can produce【小题2】What is the disadvantage of the experimental version of the device?A．It is too heavy for the walker to bearB．It is too plex for people to useC．It is too expensive for most people to affordD．It will slow down one’s walking speed.【小题3】Compared with the device designed by Larry Rome ,this new device .A．produces power without adding more loads to the walkerB．can produce more power in a much shorter timeC．needs to be equipped with a batteryD．can help the walker walk faster【小题4】From the passage, we can learn that the electrical device can .A．help housewives operate the washing machineB．make it much easier for us to go onlineC．produce more electricity than that invented by Larry RomeD．be applied to operate heart pacemakers【小题5】What would be the best title for the passage?A．First device powered by walking will soon be on the marketB．Advanced technology brings in a new way to operate heart pacemakersC．Device gives new meaning to the idea of power walkingD．Human energy will bee a main source of electricityB
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(答案→)B
解析：本文主要介绍的是一种新的装备让我们步行也可以发电，以及这种装置的工作原理等。
【小题1】B 段落大意题。根据文章第2段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.可知本段主要讲述的是这个机器是如何运转工作的，故B正确。
【小题2】C 细节题。根据文章第4段1,2行The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy.可知这个机器太贵了，普通人买不起这个机器。故C正确。
【小题3】.A 推理题。根据文章最后2行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.可知以前的旧机器需要人背着很重的负荷。故A正确。
【小题4】D 细节题。根据文章第三段The device could also be used in hospitals to operate heart pacemakers（起博器）.可知这个机器可以为起搏器充电。故D正确。
【小题5】C 主旨大意题。本文主要介绍的是一种新的装备让我们步行也可以发电，以及这种装置的工作原理等。故C正确。