The cooling material is a very thin board with many layers that could be placed on a roof like solar panels(太阳能电池板).However, instead of turning sunlight into energy as solar panels do, the material turns into infrared radiation(红外辐射).
Shanhui Fan is an electrical engineering professor at Stanford University. He says that the panels have a layer of material that is like sand and they act like a mirror, taking heat out of buildings and reflecting（反射）the light from the sun. He also says both the heat and sunlight are sent 100 kilometers into outer space.
It’s a structure that cools itself without electricity input, ever under the sun. So, what it does is basically radiate heat to outer space and also reflect the sunlight so it doesn’t get heated up by the sun. And the result is that the roof will have a temperature below surrounding air temperature by a large amount.
The panels are cool to the touch, even in the sun. Researchers say they can diminish the indoor temperature.
Mr.Fan says it is like having a window into space. He says the heat is sent directly into space without warming the air.
He says buildings in developing countries that do not have electricity or air conditioning could use the panels.
The Stanford researchers described their technology in the science publication Nature. They say the main problem is creating real cooling systems using the high-tech panels. They say it may be possible to develop a cooling spray (喷雾) that could be used on existing solid structures. The researchers believe the cooling spray technology could be developed in the next three to five years. They say as much as 15 percent of the energy used in the United States is spent providing power to air conditioning systems.
1. According to the text, the cooling material .
A. is a kind of thick glass
B. is made of solar panels
C. can send heat into space
D. can turn sunlight into energy
2. According to Shanhui Fan, the panels .
A. have a layer of sand
B. turn sunlight into electricity
C. will absorb heat from the sum
D. reflect sunlight and won’t get heated up
3. The underlined word “diminish” in Paragraph 5 can be replaced by .
A. reduce B. control C. change D. measure
4. What does the last paragraph mainly discuss?
A. The various uses of cooling materials.
B. The characteristics of cooling systems.
C. The main problems with cooling technology.
D. The future development of cooling technology.
5. Which of the following could be the best title of this text?
A. Uses of solar panels rediscovered
B. High-tech material cools buildings
C. Scientists find new ways to store heat from the sun
D. Cooling spray may be a new solution to power shortage
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