8.Electrical devices(儀器)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 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 2005by 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.
66.The second paragraph mainly talks aboutB.
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
67.What is the disadvantage of the experimental version of the device?C
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.
68.Compared with the device designed by Larry Rome,this new deviceA.
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
69.From the passage,we can learn that the electrical device canD.
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 to operate heart pacemakers
70.What would be the best title for the passage?C
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.
分析 本文主要介紹的是一種讓我們步行也可以發(fā)電的新裝備,以及這種裝置的工作原理等.
解答 66---70 BCADC
66.答案B.段落大意題.根據(jù)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.可知本段主要講述的是這個(gè)機(jī)器是如何工作的,故B正確.
67.答案C.細(xì)節(jié)題.根據(jù)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.可知這個(gè)機(jī)器太貴了,普通人買不起這個(gè)機(jī)器.故C正確.
68.答案A.推理題.根據(jù)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.可知以前的舊機(jī)器需要人背著很重的包以提供電力,但新的機(jī)器人不需要.故A正確.
69.答案D.細(xì)節(jié)題.根據(jù)文章第三段The device could also be used in hospitals to operate heart pacemakers(起博器).可知這個(gè)機(jī)器可以為起搏器充電.故D正確.
70.答案C.主旨大意題.本文主要介紹的是一種讓我們步行也可以發(fā)電的新裝備,以及這種裝置的工作原理等.故C正確.
點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力,做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確的選擇.在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí),要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷.