The rise in wood fuel use has _____ the disap...

The rise in wood fuel use has _____ the disappearance of forest and the loss of habitats for pandas.

A. belonged to      B. adapted to       C. devoted to   D. contributed to

高三英语单项填空中等难度题查看答案及解析

Everywhere man has cut down_____ forests in order to grow crops，or to use_____ wood as fuel or as building material.

A. the; the         B. the; /　     C. /；the           D. /；/

高三英语单项填空中等难度题查看答案及解析

For years, the automobile industry has been testing vehicles that use hydrogen as fuel. Now, people across the United States have had a chance to see and even drive cars that get power from hydrogen fuel cells (燃料电池).

But the hydrogen fuel cell is not a new idea. The fuel cell was first invented by Sir William Grove of Britain in 1839. Since then, many different designs, have been invented. There is one place where fuel cells are a proven technology: in space. The American space agency used fuel cells in its Apollo spaceships in the twentieth century.

The most useful fuel cell for transportation purposes is the Polymer Electrolyte Membrane, or P.E.M. fuel cell. It is simple and can operate at temperatures of sixty to eighty degrees Celsius. That is much lower than other fuel cell designs. A P.E.M. fuel cell has two sides divided by a thin membrane (膜). Hydrogen gas is forced through one side where it comes in contact with a reactive material containing the metal platinum(铂). The membrane separates the electrons(电子) from the protons(质子) in the hydrogen atoms. The protons pass through it to the other side of the fuel cell. But the electrons are captured to do work; like powering a motor. Oxygen from the air is forced into the other side of the fuel cell. There, the gas meets the protons that have passed through the membrane. They combine to form water and heat. A single fuel cell does not produce a lot of electricity. But when many fuel cells are combined, they can produce enough electricity to power a vehicle. The product of the chemical reaction that powers fuel cells is water. This makes fuel cells a very clean technology.

Hydrogen fuel cell cars have been slow to develop because of many technical problems that have to be solved. For example, it is unclear how long the membranes in P.E.M. fuel cells will last. Also, fuel cells need water for their chemical reactions. They must be designed to start easily at low temperatures and in dry climates. And smaller, less costly fuel cells must be designed before they can truly take the place of gasoline engines. Now more models of fuel cell vehicles are being tested than ever before. The threat of climate change and the high cost of oil have increased interest in these vehicles that do not cause pollution.

高三英语填空题中等难度题查看答案及解析

There has been_____ rising demand for grain as_____ industrial material in spite of the nation’s

good harvests.

A. /, an                 B. a, an                C. the, an          D. a, /

高三英语单项填空中等难度题查看答案及解析

Billions of poor people around the world 1. (depend) on the use of wood for cooking. And as they take more and more firewood from wild areas, they are destroying habitats around the world. Wood collection is one reason why many animals have become endangered.

This is 2. Dr. Metcalf spends each summer in Africa. He wants to teach women and children in villages how to cook with the sun. He helped create Solar Cookers International. It’s an organization that introduces solar cookers to developing countries 3. teaches people how to use them.

高三英语语法填空中等难度题查看答案及解析

Morocco has a lot of sun, a lot of deserts and a high demand for imported fuel. And that's why the Moroccan government is moving ahead with a huge concentrated solar power plant near the desert city of Ouarzazate — one of four plants in total which, when completed, will have generating capacity(发电量) of 580MW. Combined with the country’s wind and hydro-power (水力发电) efforts, Morocco’s ambitious solar push will mean the country will get close to 50% of its electricity from renewable generation as early as 2020.

Phase I of the project, the 160MW Noor l, is going to start generating electricity next month and includes a capacity for molten sand energy storage which will allow up to 3 hours of electricity generation after the sun goes down. Phases 2 and 3 will have the capacity for up to eight hours of storage, meaning that solar energy really could be used to power homes around the clock.

Besides the scale of such plans, what’s impressive to me is how quickly the renewable energy can be developed. What other forms of energy could so greatly change a country’s energy composition in just a few short years? Not only should this be an encouraging sign for those of us who favor renewable energy, but it also should give reason for would-be investors in traditional fossil fuel generating industry.

If renewable energy costs continue to fall, even existing(现有的) coal and gas plants will find themselves limited by newer, cleaner forms of energy that can be increased rapidly.

Interestingly, some analysts suggest this is happening already. In the US, for example, coal power plants are being retired earlier than expected due to a combination of increased competition from gas and renewable energy, as well as tighter regulations of emissions (排放). Also, increasing amounts of solar and wind cause gas and coal plants not to use, significantly reducing their profits and further giving an edge to the clean energy competition.

If this proves to be the case in North Africa too, Morocco's solar ambitions could help transform the energy system well beyond its own borders.

1.What's the main theme of the passage?

A. Solar energy is fully developed in Morocco.

B. There are advantages of developing solar energy.

C. Morocco is a country with quantities of deserts.

D. Morocco's efforts to generate renewable electricity.

2.What is the advantage of Phase l?

A. Its energy storage can last up to three hours.

B. It has the capacity for as many as eight hours.

C. It continues producing electricity after the sun sets.

D. It is going to begin generating electricity in a month.

3.What does the author think of the renewable energy development?

A. Upset.　　 B. Striking.　　 C. Sensitive.　　 D. Doubtful.

4.Coal power plants in the US are being retired earlier than expected because of ________.

A. various reasons　　 B. heavy pollution

C. fierce competition　　 D. the government's limitation

高三英语阅读理解困难题查看答案及解析

What should we use for power when all the oil in the world has_____ ?

A. run out of       B. used up   C. given out            D. given off

高三英语单项填空简单题查看答案及解析

The rise of the Internet has been one of the most transformative developments in human history, comparable in impact to the invention of the printing press and the telegraph. Over two billion people worldwide now have access to vastly more information than ever before, and can communicate with each other instantly, often using Web-connected mobile devices they carry everywhere. But the Internet’s tremendous impact has only just begun.

“Mass adoption of the Internet is driving one of the most exciting social, cultural, and political transformations in history, and unlike earlier periods of change, this time the effects are fully global,” Schmidt and Cohen write in their new book The New Digital Age.

Perhaps the most profound changes will come when the five billion people worldwide who currently lack Internet access get online. The authors do an excellent job of examining the implications of the Internet revolution for individuals, governments, and institutions like the news media. But if the book has one major shortcoming, it’s that authors don’t spend enough time applying a critical eye to the role of Internet businesses in these sweeping changes.

In their book, the authors provide the most authoritative volume to date that describes — and more importantly predicts — how the Internet will shape our lives in the coming decades. They paint a picture of a world in which individuals, companies, institutions, and governments must deal with two realities, one physical, and one virtual.

At the core of the book is the idea that “technology is neutral, but people aren’t.” By using this concept as a starting point, the authors aim to move beyond the now familiar optimist vs. pessimist dichotomy (对立观点) that has characterized many recent debates about whether the rise of the Internet will ultimately be good or bad for society. In an interview with TIME earlier this week, Cohen said although he and his co-author are optimistic about many aspects of the Internet, they’re also realistic about the risks and dangers that lie ahead when the next five billion people come online, particularly with respect to personal privacy and state surveillance(监视).

【题文1】 In what way is the rise of the Internet similar to the invention of the printing press and the telegraph?

A. It transforms human history.

B. It revolutionizes people's thinking.

C. It is adopted by all human beings.

D. It makes daily communication easy.

【题文2】 In what respect is the book The New Digital Age considered inadequate?

A. It lacks an objective evaluation of the role of Internet businesses

B. It fails to look into the social implications of the Internet.

C. It fails to recognize the impact of the Internet technology.

D. It does not address the technical aspects of Internet communication.

1.What will the future be like when everybody gets online?

A. People don’t have to travel to see the world.

B. People will have equal access to information.

C. People will be living in two different realities.

D. People don’t have to communicate face to face.

2.What does the passage say about the authors of The New Digital Age?

A. They leave many questions unanswered concerning the Internet.

B. They don’t take sides in analyzing the effects of the Internet.

C. They have explored the unknown territories of the virtual world.

D. They are optimistic about the future of the Internet revolution.

高三英语阅读理解中等难度题查看答案及解析

Do you suffer from cybersickness？

The rise of mobile phones has been blamed for a number of social ills, but your smart phone may also be making you physically sick as well. Scientists have identified a condition called “cybersickness”, which they say is the digital version of motion sickness. The phenomenon, which affects up to 80 percent of the population who own smart phones or tablets, leads to feelings of sickness and unsteadiness. It is caused by seeing fast motion on a screen, which covers anything from a car chase in a film to scrolling through web pages on your phone.

The more realistic the visual content appears to you, the higher your chances of getting cybersickness are . The condition was identified in a piece in the New York Times in which British and US experts said that it needed solving. Motion sickness leaves sufferers feeling ill because they feel movement in your muscles and your inner ear but do not see it. The mismatch in digital sickness is the opposite—you see movement on the screen but do not feel it. The effect is the same and the symptoms include a headache, wanting to throw up, confusion and the need to sit down. Often cybersickness shows itself in a subtle way and sufferers put it down to stress or eyestrain.

Steven Rauch, a professor of otolaryngology（耳鼻喉科学） at Harvard Medical School, said: “Your sense of balance is different from other senses in that it has lots of inputs. When those inputs don’t agree, that’s when you feel dizziness and sickness. ”

Some studies that have been carried out into cybersickness found that women are more susceptible than men, the New York Times reported. Those who have Type A’ personalities—meaning they are confident and determined—are more likely to suffer from cybersickness as well. Among those who have reported experiencing the condition have been video gamers who spend hours playing fast paced games. Engineers at Oculus VR, the virtual headset manufacturer, have admitted that digital motion sickness is one of their biggest problems.

1.From the text, we know that cybersickness ______.

A. is completely equal to motion sickness

B. affects up to 80% of the population.

C. leads to people’s feelings of sickness and unsteadiness

D. is caused by seeing fast moving objects around

2.What’s the difference between motion sickness and digital sickness?

A. Digital sickness means sufferers see movement but do not feel it.

B. Digital sickness means sufferers feel movement but do not see it.

C. Motion sickness means sufferers see movement but do not feel it.

D. Motion sickness means sufferers don’t see or feel movement

3.What does the underlined word “susceptible” in the last paragraph mean?

A. likely to accept　　　　　　 　 B. likely to be affected

C. likely to suspect　　　　　 　 D. likely to be cured

4.This passage is most probably ____________.

A. a science fiction　　　　 B. a newspaper ad

C. a book review　　　　　　 　　 D. a science news report

高三英语阅读理解中等难度题查看答案及解析

The employment rate has continued to rise in big cities thanks to the efforts of the local govenments to increase________.

A. then        B. those             C. it              D. that

高三英语单项填空中等难度题查看答案及解析