Anewdevice(设备)workslikeasolarpanel,exceptitdoesn'tharve...

问题详情：

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 (红外线的) 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 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.

"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. "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.

is the device designed?

includes two aluminum plates with different functions.

is equipped with a heat resistant generator in the center.

two aluminum plates are exposed to air to keep heat out.

generator is sealed by a transparent cover to remain cool.

is the limitation with the tested device?

won't be expanded to be much larger.          fails to produce electricity fast enough.

is unable to power small electric lamps.       produces a limited amount of electricity.

paragraph 6, Yuan Yang mainly intends to________.

uate the device on a positive basis            t out the problems with the device

ain the research work for the device         ent on Aaswath Raman's prediction

can be a suitable title for the text?

s Are Powered by the Energy From the Cold Night Sky

B.A Generator Producing Electricity Has Been Applied in Many Areas

ntists Have Made a Breakthrough in Harvesting Green Energy

D.A Device Uses Energy From the Cold Night Sky to Produce Electricity

【回答】

1.A; 2.D; 3.A; 4.D 解析：1.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.较冷的一面面向天空,贴在一块铝板上.铝板被一个透明的盖子密封起来,并被隔绝热量的材料包围着.它通过消除吸收的任何红外线辐*热量,保持比周围空气更冷."及第四段 "The bottom of the generator is attached to an exposed aluminum plate, which is warmed by the local air.发电机底部连接在暴露的铝板上,铝板由当地空气加热." 可知,这种设备装有两种功能相同的铝板.故选A. 2.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.这台发电机每平方米产生的功率高达25毫瓦.这刚好足够点亮一盏小电灯.进一步的改进可能会使其每平方米至少产生500毫瓦."可推断,这个被测试的设备产生的电量是有限的.故选D. 3.推理判断题.原文"It's a very clever idea.这种设备是一个非常聪明的想法以及 It might also provide a bit of energy to people living in areas that lack electricity也可能为生活在缺少电的地方的人们提供一点能源."材料科学家袁洋在这一段称赞了这种设备,还说虽然这种新设备需要改进,但它可能对备用电源有用,由此可推断,袁洋主要从正面评价了该设备.故选A. 4.标题判断题.通读全文、尤其是文章第一段"Instead, it uses energy from the cold night sky.相反,它使用的是来自寒冷夜空的能量."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.故选D.

知识点：科普环保类阅读

题型：阅读理解