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1、单元综合检测(二)Unit 2The environment(时间：100分钟；满分：120分).阅读理解(共15小题；每小题2.5分，满分37.5分)AResearchers at Stanford University have developed a new material that can move heat out of buildings and into space.The researchers say the material can cool buildings even on hot days.The cooling material is a very thin sh
2、eet with many layers that could be placed on a roof like solar panels(板)However, instead of turning sunlight into energy as solar panels do, the material turns heat into infrared(红外线的)radiation.Shanhui Fan is an electrical engineering professor at Stanford University.He says that the panels have a l
3、ayer of material that is like sand.The panels act like a mirror.They take heat out of buildings and reflect the light from the sun.And he says both the heat and sunlight are sent 100 kilometers into outer space.Its a structure that cools itself without electricity input, even under the sun.So, what
4、it does is basically radiate heat to outer space and also reflect the sunlight so it doesnt get heated up by the sun.Mr.Fan says it is like having a window into space.The heat is sent directly into space without increasing the air temperature.He says buildings in developing countries that do not hav
5、e electricity or air conditioning could use the panels.“In areas where electricity is out of reach for many people, there is a potential benefit for storing medicine or even food.In many of these situations, being able to reduce the temperature is important.And this would provide a way to do it.”The
6、 researchers say the main problem is creating actual cooling systems using the hightech panels.They say it may be possible to develop a cooling spray(喷涂)that could be used on present solid structures.They believe the cooling spray technology could be developed in the next three to five years.They sa
7、y as much as 15 percent of the energy used in the United States is spent providing power to air conditioning systems.【语篇解读】本文介绍一种被用来使建筑物降温的新材料。这种新panel既环保又节能，它仍在研究中。1What is the main idea of Paragraph 1?ALiving on hot days is no longer a big problem now.BResearchers are developing new solar panels o
8、n roofs.CA new material is created to cool the buildings.DThe new material is a very thin sheet with many layers.C段落大意题。根据第一段第一、二句“Researchers at Stanford University have developed a new material that can move heat out of buildings and into space.The researchers say the material can cool buildings e
9、ven on hot days.”可知第一段介绍了一种被用来使建筑物降温的新材料。故选C。2According to Paragraph 2, how does the panel work?AIt takes in the heat and cools it down.BIt uses a mirror to reflect the sunlight.CIt has a window to let out the heat.DIt sends heat away right into space.D细节理解题。根据第二段中“The heat is sent directly into spa
10、ce without increasing the air temperature”可知，the panel将热量送入太空。故选D。3Which of the following can best describe theadvantage of the new panel?AConvenient but impractical.BEcofriendly and energysaving.CEffective but expensive.DCreative and cheap.B推理判断题。根据第一段最后一句“However, instead of turning sunlight into
11、energy as solar panels do, the material turns heat into infrared(红外线的)radiation.”和最后一段最后一句“They say as much as 15 percent of the energy used in the United States is spent providing power to air conditioning systems.”可知，这种新panel既环保又节能。故选B。4What can you infer from the passage?AThe device of the new pa
12、nel is still under research.BSome people got benefits from producing the panels.CIt is impossible to solve the problem of creating actual cooling system.DThe new panels may save 15 percent of the energy.A推理判断题。根据最后一段中“They say it may be possible to develop a cooling spray(喷涂)that could be used on pr
13、esent solid structures.They believe the cooling spray technology could be developed in the next three to five years.”可知，这种新panel设备仍在研究中。故选A。BThe earth is dying before us yet we sit and watch.If the TV or the game system breaks，we run off to the stores to get it fixed immediately no matter what the c
14、ost is.Why arent we willing to fix our earth? Are our televisions and game systems more important to us than where we live? Where shall we continue to live，until the end of time?The earth is our home and cannot be replaced.We must take care of it.We have come up with so much technology that limits u
15、s instead of helping us.Take that game system we run to repair.What does it do? It occupies kids time! The earth has already given kids plenty of entertainment in the forms of fields and hills，forests and plains，water and land.However，instead of using what the earth has given us，and helping kids by
16、giving them exercise as they run around，we decide to ruin kids minds with game systems that glue them to the screen for hours，and make them ignore their homework and chores.We have polluted this earth by making these things which do not even help in any way!We have already messed up this world，we have ruined the air，water，and animals that it has so willingly provided for us.We n
