8.Researchers around the world have been trying their hand at making better use of the huge amount of wind energy available in nature to produce clean energy.Apart from this,studies are being carried out to harness(利用) usable wind energy produced by man-made technologies.
One useful source identified by Indian inventor Santosh Pradhan about two years ago is a speeding train,which produces fierce wind that can be transformed into electricity.
According to Pradhan's proposal,with a few small improvements in existing trains running in Mumbai,the largest city in India,at least 10,000megawatts(兆瓦) of electricity could be harvested each day.
Building on this principle,designers Ale Leonetti Luparinia and Qian Jiang from Yanko Design have created a device(裝置) called T-Box that harnesses wind energy from speeding trains.
T-Box can be placed within the railway tracks.It is half-buried underground between the concrete sleepers(水泥枕木),which does not disturb the normal train operating at all.According to Yanko,around 150T-Boxes can be fitted along a 1,000-meter railway track.
A train running at a speed of 200kph can produce winds blowing at 15miles a second.Based on this calculation,150T-Boxes can produce 2.6KWH of electricity per day.The T-Box's design won a silver medal in last year's Lite-On Awards and was exhibited last summer at the Xue Xue Institute in Taipei,Taiwan Province.
Though the figures look impressive,it is important to remember that the design is still at a conceptual stage and hasn't taken into account issues such as pieces of waste material produced by the device and the efforts and costs involved in the maintenance(維護(hù)) of the device.
We can expect the technology to see the light of the day only after it clears these issues.If so,rail travel,one of the greenest forms of travel,will become greener and more energy-efficient.
46.What can we learn about T-Box?A
A.It is based on Pradhan's idea.
B.It will be fitted on the trains.
C.It can turn electricity into light.
D.It was invented by an Indian scientist.
47.How much electricity can be produced per day by T-Boxes along a railway track of 100km?A
A.260KWH.
B.2.6KWH.
C.150KWH.
D.1.5KWH.
48.It can be concluded from the last two paragraphs thatC.
A.T-Box has proved to be effective in harvesting wind
B.the maintenance of T-Box will be costly
C.there is much to do about T-Box
D.T-Box will come into use soon
49.According to the passage,which of the following statements is TRUE?B
A.The Indian inventor Santosh Pradhan invented the speeding train.
B.The T-Box's design won a silver medal in Lite-On Awards last year.
C.Rail travel has become one of the energy-efficient technologies in the world.
D.The India harvests 10,000megawatts of electricity each day on average.
50.The passage is mainly written toD.
A.encourage more people to travel by train
B.explain the advantages of electricity
C.tell readers how to save energy and money
D.introduce a new invention to readers.

分析 本文是一篇科教類閱讀,屬于說明文,世界各地的研究人員一直盡力更好地利用自然中可用的大量的風(fēng)能來生產(chǎn)清潔能源.本文以此展開敘述,主要介紹一種新的綠色能源,可以讓我們的出行變得更環(huán)保和更有效.

解答 46.A 細(xì)節(jié)理解題.根據(jù)第三段提到According to Pradhan's proposal,with a few small improvements in existing trains running in Mumbai,這是基于Pradhan'的建議,故選A項(xiàng).47.A 細(xì)節(jié)理解題.根據(jù)第五段提到According to Yanko,around 150 T-Boxes can be fitted along a 1,000-meter railway track.和第六段提到Based on this calculation,150 T-Boxes can produce 2.6 KWH of electricity per day可知是2.6乘以100,故選A項(xiàng).
48.C 推理判斷題.根據(jù)倒數(shù)第二段提到Though the figures look impressive,it is important to remember that the design is still at a conceptual stage雖然這個數(shù)字是很可觀的,但要記住這個設(shè)計(jì)處在概念階段,故還有很多工作要做,故選C項(xiàng).
49.B 推理判斷題.根據(jù)倒數(shù)第三段提到The T-Box's design won a silver medal in last year's Lite-On Awards and was exhibited last summer at the Xue Xue Institute in Taipei,Taiwan Province.可知這個設(shè)計(jì)在去年的光寶創(chuàng)新獎獲得銀獎,故選B項(xiàng).
50.D 推理判斷題.通過最后一段提到We can expect the technology to see the light of the day only after it clears these issues.If so,rail travel,one of the greenest forms of travel,will become greener and more energy-efficient.我們期望著看到更多的綠色能源,所以可知本文介紹的一種新的能源給讀者,故選D項(xiàng).

點(diǎn)評 本文是一篇科教類閱讀,題目涉及多道細(xì)節(jié)理解題,推理判斷題.做題時學(xué)生應(yīng)仔細(xì)閱讀原文,把握文章主要內(nèi)容,聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義,從中選出正確答案,一定要做到有理有據(jù),切忌胡亂猜測.

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