Generally speaking, _________ main material for building houses has been concrete, but _________ wood and stone have also been used.
A. the; / B. /; / 
the; the D. /; the
高三英语单项填空中等难度题
Generally speaking, _________ main material for building houses has been concrete, but _________ wood and stone have also been used.
A. the; / B. /; / the; the D. /; the
高三英语单项填空中等难度题
Generally speaking, _________ main material for building houses has been concrete, but _________ wood and stone have also been used.
A. the; / B. /; / the; the D. /; the
高三英语单项填空中等难度题查看答案及解析
In manufacturing, cheaper materials are constantly being for the better, more expensive kind.
A. maintained B. cancelled C. substituted D. deposited
高三英语单项填空困难题查看答案及解析
Generally speaking, the family, not the school, plays the role in educating children for life.
A. potential B. primary
C. personal D. professional
高三英语单项填空中等难度题查看答案及解析
Generally speaking, the family, not the school, plays the role in educating children for life.
A. potential B. primary C. personal D. professional
高三英语单项填空中等难度题查看答案及解析
Generally speaking，the Internet makes________possible for people to get the information they need quickly.
A．them B．themselves
C．it D．that
高三英语单项填空中等难度题查看答案及解析
Wood has many great characteristics that make it the perfect building material. It is cheap, durable(耐用的), easily available, and most importantly, environmentally sustainable. The one thing it is not, is transparent(透明的).Now thanks to a team of scientists at Stockholm’s KTH Royal Institute of Technology, the material may even be able to add that feature to its already impressive list.
Lead researcher Dr. Lars Berglund said he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices.
The team began by pulling out the wood’s lignin (木质素). The lignin-free wood was then dipped into a polymer (聚合物) and baked at a temperature of 158F for four hours. The result was a hybrid product that was not only stronger and lighter than the original wood but also, almost transparent. The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood.
While scientists have previously created a see-through wood for small-scale applications like computer chips, the transparent wood is the first one being considered for large scale applications. The researchers, who revealed their findings in Biomacromolecules on April 11, picture using the transparent wood in buildings to allow for more natural light, or to create windows that let in the desired amount of light without sacrificing privacy.
Wood that allows light to pass through could lead to a brighter future for homes and buildings. Berglund also thinks the wood could play a significant role in the design of solar panels. The semi-transparent material would be able to keep light longer and give it more time to interact with the conductor, thus resulting in better solar efficiency.
Additionally, substituting the currently used glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost. They are now experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.
1.What does the underlined part "that feature" in Paragraph 1 refer to?
A.Cheapness. B.Durability.
C.Sustainability. D.Transparency.
2.Which of the following is not the process in which the transparent wood is made?
A.Dip the wood into a polymer. B.Reduce the amount of the polymer.
C.Make the wood lignin-free. D.Bake the wood for some time.
3.What’s the purpose of using the transparent wood in buildings?
A.To protect privacy. B.To scale out applications.
C.To get more natural light. D.To observe more clearly.
4.What is the last paragraph mainly about?
A.The bright future of the transparent wood.
B.The wood’s role in the design of solar panels.
C.The disadvantages of the currently used glass.
D.Solar energy manufacturers’ carbon footprint.
高三英语阅读理解中等难度题查看答案及解析
Wood has many great characteristics that make it the perfect building material.It is cheap，durable，easily available，and most importantly，environmentally sustainable.The one thing it is not，is transparent! Now thanks to a team of scientists at Stockholm’s KTH Royal Institute of Technology the material may even be able to add that feature to its already impressive list.
Lead researcher Dr，Lars Berglund said he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices.The team began by pulling out the wood’s lignin(木质素).The lignin-free wood was then dipped into a polymer(聚合物)and baked at a temperature of 158°F for four hours.The result was a hybrid product that was not only stronger and lighter than the original wood but also，almost transparent.The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood.
While scientists have previously created a see-through wood for small-scale applications like computer chips，the transparent wood is the first one being considered for large scale applications.The researchers，who revealed their findings in Biomacromolecules on April 11，picture using the transparent wood in buildings to allow for more natural light，or to create windows that let in the desired amount of light without sacrificing privacy.
Wood that allows light to pass through could lead to a brighter future for homes and buildings.Berglund also thinks the wood could play a significant role in the design of solar panels.The semitransparent material would be able to keep light longer and give it more time to interact with the conductor，thus resulting in better solar efficiency.Additionally，substituting the currently used glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost.They are now experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.
1.What does the underlined part“that feature”in Paragraph 1 refer to?
A. Cheap. B. Durable. C. Sustainable. D. Transparent.
2.Which of the following correctly shows the process in which the transparent wood is made?
①Dip the wood into a polymer. ②Adjust the amount of the polymer.
③Make the wood lignin-free. ④Bake the wood for some time.
A. ③→①→④→② B. ③→①→②→④
C. ①→②→③→④ D. ④→③→②→①
3.Which of the following is true according to the text?
A. Berglund got the idea of transparent wood while making paper.
B. Varying the amount of the polymer changes the wood’s hardness.
C. The transparent wood would be used only for homes and buildings.
D. The cost of making the transparent wood still needs to be cut down.
4.What is the last paragraph mainly about?
A. The bright future of the transparent wood.
B. The wood’s role in the design of solar panels.
C. The disadvantages of the currently used glass.
D. Solar energy manufacturers’carbon footprint.
高三英语阅读理解中等难度题查看答案及解析
A team of engineers 1.(create)a super-thin material that could help keep buildings cool. The team developed the revolutionary new material, 2.is very thin and can cool objects even under direct sunlight. The material does not need energy to work3.does it need water to help keep things cool. The engineers say4.new material could provide an answer to air conditioners, which are expensive 5.(run). The material is unlike anything 6.(find) in nature. It is just 50 micrometers thick. That's slightly 7.(thick) than the aluminum foil(锡箔纸) we use for cooking.
The engineers explained how their new material works. They said when it is put on top of something, two things happen. It cools the object underneath by 8.(reflect) the sun's rays back into space. At the same time, the material removes the object's own heat and sends that into the air. An engineer said: "We're excited about the opportunity to explore potential uses in different scientific 9.(field)." Another researcher said: "Just 10 to 20 square meters of this material on the rooftop could 10.(nice) cool down a house in summer."
高三英语短文填空中等难度题查看答案及解析
---All the building materials have been washed away.
---So I have heard. But there was no sign ______ a heavy rain was on the way last night.
A. when B. If C. which D. that
高三英语单项填空中等难度题查看答案及解析
A team of engineers1.(create)a super-thin material that could help keep buildings cool.The team developed the revolutionary new material,2.is very thin and can cool objects even under direct sunlight.The material does not need energy to work3.does it need water to help keep things cool.The engineers say4.new material could provide an answer to air conditioners,which are expensive5.(run).The material is unlike anything6.(find) in nature.It is just 50 micrometers thick.That's slightly7.(thick) than the aluminum foil（锡箔纸）we use for cooking.
The engineers explained how their new material works.They said when it is put on top of something,two things happen.It cools the object underneath by8.(reflect) the sun's rays back into space.At the same time,the material removes the object's own heat and sends that into the air.An engineer said:"We're excited about the opportunity to explore potential uses in different scientific9.(field)."Another researcher said:"Just 10 to 20 square meters of this material on the rooftop could10.(nice) cool down a house in summer."
高三英语短文填空中等难度题查看答案及解析