A new device(设备) works like a solar panel, except it doesn't harvest energy from the sun to produce electricity. Instead, it uses energy from the cold night sky.
     In the center of this device is a thermoelectric generator (热电发电机), which  uses  the temperature difference between Earth and outer space to create electricity.
      As long as one side of it is cooler than the other. the generator can produce electricity. The cooler side faces the sky and is attached to an aluminum plate. That plate is sealed under a transparent cover and surrounded with materials that keep heat out. It stays cooler than the surrounding air by getting rid of any heat it  absorbs as infrared( 红外线)  radiation.  That radiation can zip up through the transparent cover and on toward outer space.
     The bottom of the generator is attached to an exposed aluminum plate, which is warmed by the local air. At night, the top plate can get several degrees centigrade cooler than the
bottom of the generator.
     Researchers tested the device one clear December night in Stanford, Calif. The generator produced up to about 25 mill watts of power per square meter of the device. That was just enough power to light a small electric lamp.  Further improvements might develop its production to at least 500 mill watts per square meter.
      "It's a very clever idea," says Yuan Yang, a materials scientist who works at Columbia University in New York City.  "The device still needs improving," he notes. Is but this new device may be useful for backup power," Yang says. "It might also provide a bit of energy to people living in areas that lack electricity.
       "The device could help power remote weather stations or other environmental devices."says Aaswath Raman. a materials scientist who worked on the device at the University of California, Los Angeles. What's more, this may be useful in areas that don't see sunlight for months at a time. Raman adds.
32. How is the device designed?
    A. It includes two aluminum plates with different functions.
    B. It is equipped with a heat-resistant generator in the center.
    C. Its two aluminum plates are exposed to air to keep heat out.
    D. Its generator is sealed by a transparent cover to remain cool.
33. What is the limitation with the tested device?
    A. It won't be expanded to be much larger.
    B. It fails to produce electricity fast enough.
    C. It is unable to power small electric lamps.
    D. It produces a limited amount of electricity.
34. In paragraph 6. Yuan Yang mainly intends to
    A. evaluate the device on a positive basis
    B. point out the problems with the device
    C. explain the research work for the device
    D. comment on A swath Raman's prediction
35. What can be a suitable title for the text?
    A. Lamps Are Powered by the Energy From the Cold Night Sky
    B. A Generator Producing Electricity Has Been Applied in Many Areas
    C. Scientists Have Made a Breakthrough in Harvesting Green Energy
    D. A Device Uses Energy From the Cold Night Sky to Produce Electricity
【答案与解析】
本文是一篇说明文。主要介绍了一种像太阳能电池板一样能发电的新设备，不过，该设备不从太阳获取能 量，而是从寒冷的夜空中获愚世量。“
32. A 细节理解题。根据第三段“The cooler side faces the sky and is attached to an aluminum plate. That plate is sealed under a transparent cover and surrounded with materials that keep heat out. It stays cooler than the surrounding air by getting rid of any heat it absorbs as infrared(红外线的)radiation."及第四段 “The bottom of the generator is attached to an exposed aluminum plate, which is warmed by the local air." 可知，、这种设备装有两捋功能J同的铝板。
33. D 推理判断题。根据第五段“The generator produced up to about 25 milliwatts of power per square meter of the device. That was just enough power to light a small electric lamp. Further improvements might develop its production to at least 500 milliwatts per square meter."可推断，这个被测试的丧备产生的电量有 限。
34. A 推理判断题。材料科学家袁洋在这一段称赞了这种设备，说发明这种设备是一个非常聪明的想法;还 说虽然这种新设备需要改进，但它可能对备用电源有用，也可能为生活在缺少电的地方的人们提供一点能 源。由此可推断，袁洋主要从正面评价了该设备。
35. D 标题判断题。通读全文、尤其是文章第一段可知，本文主要是在介绍一种从寒冷的夜空中获取能量来
发电的新设备。