题目

 阅读理解Turning on the air conditioning can bring sweet relief from the heat. But your resulting energy bill? Not so much. What if your home could stay cool all on its own? That's the premise (前提) of Zheng Yi's new invention. The associate professor at Northeastern University in Boston has created a sustainable material that can be used to make buildings or other objects able to keep cool without relying on conventional cooling systems. Zheng imagines this material covering the roofs of houses or other buildings. The material, which Zheng has named "cooling paper", has light colors and internal microstructure with many small holes. It reflects those warm solar rays away from the building, and it also absorbs heat inside — heat that is from electronics, cooking and human bodies. Cooling paper is, in fact, made of paper. One day, Zheng saw a container full of used printing paper. He thought to himself, "How could we simply transform that waste material into some functional energy material?" So, with the help of a high-speed blender (搅拌机) from his kitchen, Zheng made a pulp (浆状物) out of it and the material that makes up Teflon, a type of plastic. He then made it into waterproof "cooling paper" that could coat homes. Then, he and his team tested its ability to keep cool: it can reduce temperatures by as much as 6 ℃. He selected materials that would reduce the cost of using the new technology to cool homes. The cooling paper isn't just green in its ability to reduce your energy footprint. The material can be used, exposed to solar radiation and various temperatures, and then reduced to a pulp (again) and remade without losing any of its cooling properties. "That is incredible!" Zheng says. "We thought there would be maybe 10 to 20 percent of loss, but no. It's just as well as the original. " （1） On what basis is Zheng's new invention created? A . Relieving the discomforts of the heat. B . Improving traditional cooling systems. C . Cooling the air without electricity. D . Reducing electricity use and costs. （2） What does the author say about the material in paragraph 2? A . It works in two ways. B . It's complexly structured. C . It has limited applications. D . It's available in dark colors. （3） Where did Zheng get inspiration for the cooling paper? A . From Teflon. B . From a pulp. C . From the blender. D . From the waste paper. （4） Which aspect of the cooling paper is mainly stressed in the last paragraph? A . Its practicality. B . Its recyclability. C . Its heat resistance. D . Its user-friendliness. 答案： C A D B

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