Electrical devices(仪器)could soon use power ma...

Electrical devices (仪器) could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking. British scientist Max Donelan and other scientists in Canada and the United States developed the device.

The device connects to a person's knee. As the person walks, the device captures energy each time the person slows down. To do this, the device helps with the slowing down movement of the leg. The movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.

There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers (起搏器). It could even be used to assist in the movement of robotic arms and legs.

The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version should be ready in one year.

The developers hope the device will one day help developing countries. Nearly twenty-five percent of people around the world live without electric power.

A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person's back that also produces power from walking. The knee device does not produce as much electricity as the bag. But the bag requires the walker to carry a load of twenty to thirty kilograms.

1.The second paragraph mainly talks about ________.

A. who developed the device

B. how the device works

C. several possible uses for the devices

D. how much electricity the device can produce

2.What is the disadvantage of the experimental version of the device?

A. It is too heavy for the walker to bear.

B. It is too complex for people to use.

C. It will slow down one's walking speed.

D. It is too expensive for most people to afford.

3.Compared with the device designed by Larry Rome, this new device ________.

A. produces power without adding more loads to the walker

B. can produce more power in a much shorter time

C. needs to be equipped with a battery

D. can help the walker walk faster

4.From the passage, we can learn that the electrical device can ________.

A. help housewives operate the micro-wave oven

B. make it much easier for us to go online

C. produce more electricity than that invented by Larry Rome

D. be applied in medicine to operate heart pacemakers

高一英语阅读理解中等难度题查看答案及解析

Electrical devices(仪器)could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device.

The device connects to a person’s knee. As the person walks ,the device captures energy each time the person slows down. To do this ,the device helps with the slowing sown movement of the leg, the movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.

There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also he used in hospitals to operate heart pacemakers(起博器), it could even be used to assist in the movement of robotic arms and legs.

The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, but the researchers hope to make a lighter, less costly version, An improved version should be ready in one year.

The developers hope the device will one day help developing countries; nearly twenty five percent of people around the world live without electric power.

A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania, He created a bag carried on a person’s back that also produces power from walking. The knee device does not produce as much electricity as the bag, but the bag requires the walker to carry a load of twenty to thirty kilograms.

1.The second paragraph mainly talks about　　

A.who developed the device

B.how the device works

C.several possible uses for the devices

D.how much electricity the device can produce

2.What is the disadvantage of the experimental version of the device?

A.It is too heavy for the walker to bear

B.It is too complex for people to use

C.It is too expensive for most people to afford

D.It will slow down one’s walking speed

3.Compared with the device designed by Larry Rome, this new device　　

A.produces power without adding more loads to the walker

B.can produce more power in a much shorter time

C.needs to be equipped with a battery

D.can help the walker walk faster

4.From the passage, we can learn that the electrical device can　　

A.help housewives operate the washing machine

B.make it much easier for us to go online

C.produce more electricity than that invented by Larry Rome

D.be applied in medical fields to operate heart pacemakers

5.What would be the best title for the passage

A.First device powered by walking will soon be on the market

B.Advanced technology brings in a new way to operate heart pacemakers

C.Device gives new meaning to the idea of power walking

D.Human energy will become a main source of electricity

高一英语阅读选择中等难度题查看答案及解析

Scientists blame greenhouse gases for being a major cause of climate change around the world. This is because greenhouse gases trap heat in the atmosphere and make the planet warmer.

Now, a team of researchers has announced a successful experiment that turned carbon dioxide into useful liquid fuel. The researchers created a device, called a reactor, which changes carbon dioxide into a pure form of formic acid(甲酸). Formic acid is a substance (物质) found in ants and some other insects, as well as in many plants. It is used as an antibacterial material and in the processing of some kinds of clothing.

Haotian Wang led the research team. He said in a statement that the results of the experiment were important because formic acid is a major carrier of energy. So, the substance can provide a way to reuse carbon dioxide and prevent it from being released into the atmosphere. “It's a fuel-cell fuel that can generate electricity and send out carbon dioxide which you can grab and recycle again,” Wang said.

“Other methods for turning carbon dioxide into formic acid require intense purification processes,” Wang said. Such methods are very costly and require a lot of energy. The Rice University team said it was able to reduce the number of steps in the traditional process to create a low-cost, energy-saving method.

The researchers reported the reactor device performed with a conversion rate (转化率) of 42 percent. This means that nearly half of the electrical energy can be stored in formic acid as liquid fuel. The team said the reactor was able to create formic acid continuously for 100 hours with little degradation (退化) of the device’s parts.

Wang said the reactor could easily be used to produce other high-value products, including alcohol-based fuels. The researchers noted that the technology could also be a big help in solving another major energy problem—how to store large amounts of power in small places.

1.What do we know about formic acid?

A.It is a large amount of power. B.It is high- value equipment

C.It can be found in ants. D.It is a substance in clothing.

2.What is Wang’s attitude towards his own research?

A.Optimistic. B.Aggressive. C.Doubtful. D.Uncaring.

3.In what magazine can you read this text?

A.A travel magazine. B.A science magazine.

C.A music magazine. D.A sports magazine.

高一英语阅读选择中等难度题查看答案及解析

How to Protect Wildlife

Wildlife faces threats from habitat destruction, pollution, and other human actions. Although protecting wildlife may seem too hard at times, even small actions can help protect many different animals. 1.

● Create wildlife friendly areas. When trying to make your garden more beautiful, choose plants that can provide food and shelter to native wildlife. This will also help cut down on pollution. 2.

● 3. By using less water and fewer fuels, you will be helping to protect the wildlife around you. Take buses or the subway when you can and turn off electric devices when you’re not using them.

● Buy products that are wildlife-friendly. 4. Keep in mind that some endangered animals are killed by traps, catches or hunters who are after other wildlife within the same habitat.

● Limit family size. Population growth is one of the major factors in habitat destruction. With the rapidly growing population, more and more habitats for wildlife are occupied by humans. 5. In this way, the Earth’s population will stabilize and native habitats can be protected.

A.Live a greener life.

B.Donate money to organizations.

C.Each family should be limited to one or two children.

D.Avoid products that are made from endangered animals.

E.Protecting wildlife from being endangered is every family’s duty.

F.Here are some tips on how to protect wildlife through small actions.

G.Build bird houses to your garden or yard to attract and shelter these species.

高一英语七选五中等难度题查看答案及解析

The world’s first hydrogen-powered (氢动力的) trains have begun running in Germany. They began carrying passengers on Monday in Germany’s northern Lower Saxony state. The new trains will run 100-kilometre trips and can travel up to 140 kilometers per hour.

A French railroad company called Alstom built the two trains. Teams in Germany and France worked together on the project, which was supported by the German government. The new train model, called the Coradia iLint, signals the beginning of efforts in Germany and other nations to move away from pollution-producing diesel (柴油) trains.

The Coradia iLint is designed to run on non-electrified train lines with low levels of noise. It uses a process that combines hydrogen with oxygen to produce electrical power. If the system produces more energy than the train needs at that time, it can store the extra energy in batteries. The only emissions (排放物) are water and steam.

Hydrogen-powered trains cost more than diesel trains to build. But Alstom officials say the operating costs are much lower. The company plans to provide another 14 Coradia iLint trains to Lower Saxony by 2021.

The head of railroad operations in the area, Carmen Schwabl, praised replacing diesel trains with hydrogen-powered trains. She said the move was an important first step in using clean-burning technologies to reach climate protection goals.

Alstom says several other European countries have also expressed interest in developing hydrogen train systems. France have already said it wants its first hydrogen train to be on the rails by 2022.

1.Why did Germany build the new trains?

A.To replace diesel trains.

B.To carry more passengers.

C.To make traveling much faster.

D.To improve the relationship with France.

2.What is one advantage (优势) of hydrogen-powered trains over diesel trains?

A.They are cheaper to build.

B.They cost much less to run.

C.They don’t use electrical power.

D.They run without making any noise.

3.What can we know about hydrogen trains?

A.They are widely used nowadays.

B.They are environmentally friendly.

C.They can contribute to air pollution.

D.They can produce water and oxygen.

4.Which of the following might be the best title for the passage?

A.Saving Natural Resources

B.Efforts to Reduce Emissions

C.A New Way to Make Electricity

D.The World’s First Hydrogen Trains

高一英语阅读选择中等难度题查看答案及解析

People have known for a long time that plants can hear, see, smell and communicate with each other. Now, they have been recorded making sounds when stressed.

In a study, Itzhak Khait and his team found that tomato　 and tobacco plants can make ultrasonic( 超声的 ) noises. The plant “cry out” due to lack of water, or when they are cut. The sound is just too high for human to hear.

Microphones were placed 10 centimeters away from the plants and picked up sounds in the range of 20 to 100,000 hertz( 赫兹). Human hearing usually ranges from 20 to 20,000 hertz. On average, “thirsty” tomato plants made 35 sounds an hour, while tobacco plants made 11. When plant was cut, tomato plants made an average of 25 sounds in the following hour, and tobacco plants 15.

Perhaps most interestingly, different types of stress led to different sounds. The researchers used a special machine to separate the plants’ sounds from those of wind, rain and other noises of the greenhouses. In most cases, it correctly told whether the stress was caused by dryness or a cut. Water-hungry tobacco made louder sounds than cut tobacco, for example. Although Khait and his team only looked at tomato and tobacco plants, they thought other plants also made sounds when stressed. Khait’s report also suggested that insects could hear the sound up to 5 meters away and respond.

The team said if farmers could hear these sounds, they could give plants the water they need. As climate change causes more droughts(干旱), they said this would be important information for farmers, for the sound that drought-stressed plants made could be used in agriculture.

If plants are screaming for fear of their survival, should we be thankful we can’t hear them?

1.Which did Khait and his team find from their research?

A.Only tomato plants could make ultrasonic noises.

B.Humans can hear plants crying while cutting them.

C.Plants were able to produce sounds when stressed.

D.Plants made ultrasonic noises to communicate with each other.

2.How did tomato and tobacco plants react to different stresses according to the text?

A.Cut tobacco plants made weaker sounds than drought-stressed ones.

B.Tomato plants reacted to different stresses with the same sound.

C.Cut tomato plants produced more sounds than water-hungry ones.

D.Tobacco plants made louder sounds than tomato plants when short of water.

3.What’s the main idea of Paragraph 5?

A.Farmers imagine what the future agriculture will be like.

B.Farmers have contributed a lot to the research.

C.Farmers can apply the result of the research to agriculture.

D.Farmers will face lots of challenges in the future.

4.Where is this text most likely from?

A.A nature magazine. B.A novel. C.A diary. D.A guidebook.

高一英语阅读选择简单题查看答案及解析

In 1826, a Frenchman named Niepce needed pictures for his business, but he was not a good artist. So he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.

The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything very clearly, even the smallest details. This kind of photograph was called a daguerreotype.

Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities and mountains. In about 1840, photographers could take pictures of people and moving things. Mathew Brady was a well - known American photographer. He took many pictures of famous people. He was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.

In the 1880s, new inventions began to change photography. Photographers could buy films ready - made in rolls. So they did not have to make the film themselves. The invention of the small handheld camera made photography less expensive. With the small camera, anyone could be a photographer. They took pictures of their families, friends and favorite places. They called these pictures “snapshot”.

Photographs became very popular in newspapers in the 1890s. Soon magazines and books also used documentary photographs. These pictures showed true events and people. They were much more real than drawing.

Photography also turned into a form of art by the end of the 19th century. Some photographs were not just copies of the real world. They showed ideas and feelings, like other art forms.

1.What was special about Daguerre’s pictures?

A.They were used for his business.

B.They were clearer than Niepce’s.

C.They were the first colored pictures.

D.They were for an artistic purpose.

2.What can we learn about Mathew Brady?

A.He took pictures of American Civil War.

B.He was the first to photograph people.

C.He invented a new type of camera.

D.He was a hero during the Civil War.

3.What made photography accessible to common people?

A.The handheld camera.

B.The ready - made films in rolls.

C.Newspapers and magazines.

D.Popularity of travelling.

4.What is the text mainly about?

A.The history the film industry.

B.The invention of camera.

C.The development of photography.

D.The role of photographs.

高一英语阅读选择中等难度题查看答案及解析

Ever since humans have lived on the earth, they have made use of various forms of communication．Generally, this expression of thoughts and feelings has been in the form of oral speech．When there is a language barrier(障碍), communication is completed through sign language in which motions stand for letters, words, and ideas．Tourists and the people unable to hear or speak have had to turn to this form of expression．Many of these symbols of whole words are very lively and exact and can be used internationally; spelling, however, cannot．

Body language sends ideas or thoughts by certain actions, either meaningfully or not．A wink（眨眼）can be a way of showing that the party is only joking．A nod means agreement, while shaking the head indicates disagreement．

Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals．Road maps and picture signs also guide and warn people．While language is the most common form of communication, other systems and techniques also express human thoughts and feelings．

1.Which of the following statements is NOT true?

A．There are many forms of communication in use today．

B．Language is the most common form of communication．

C．Tourists are unable to use an oral form of communication．

D．Ideas and thoughts can be expressed by body language．

2.Which form other than oral speech could be most commonly used among blind people?

A．Picture signs．                      B．Braille

C．Body language                      D．Signal flags．

3.Sign language is said to be very lively and exact and can be used meaningfully except for ______．

A．spelling            B．idea            C．whole words      D．expressions

4.How many different forms of communication are mentioned here?

A．Five           B．Seven         C．Nine             D．Three

高一英语阅读理解简单题查看答案及解析

Ever since humans have lived on the earth, they have made use of various forms of communication．Generally, this expression of thoughts and feelings has been in the form of oral speech．When there is a language barrier(障碍), communication is completed through sign language in which motions stand for letters, words, and ideas．Tourists and the people unable to hear or speak have had to turn to this form of expression．Many of these symbols of whole words are very lively and exact and can be used internationally; spelling, however, cannot．

Body language sends ideas or thoughts by certain actions, either meaningfully or not．A wink(眨眼) can be a way of showing that the party is only joking．A nod means agreement, while shaking the head indicates disagreement．

Other forms of nonlinguistic(非语言的) language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals．Road maps and picture signs also guide and warn people．While language is the most common form of communication, other systems and techniques also express human thoughts and feelings．

1.Which of the following statements is NOT true?

2.Which form other than oral speech could be most commonly used among deaf people?

3.Sign language is said to be very lively and exact and can be used meaningfully except for ____．

4.How many different forms of communication are mentioned here?

高一英语阅读理解简单题查看答案及解析

For as long as humans have lived on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a spoken language problem, communication can be carried out through sign language, in which gestures stand for letters, words, and ideas. Tourists and people unable to hear or speak have often had to turn to this form of expression. When gestures describe words or ideas, they can often be used internationally. When used for spelling words however, where each gesture stands for a single letter, people must share the same written language.

Body language sends ideas or thoughts by certain actions, either meaningfully or not. A wink can be a way of showing that the person is only joking. A nod means agreement, while shaking the head indicates disagreement.

Other forms of language can be found in Braille (a reading system of raised dots read with the fingertips used by the blind), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide and warn people. While language is the most common form of communication, other systems and techniques also express human thoughts and feelings.

1.Which of the following ways can not be used as a form of communication?

A. oral speech  B. sign language         C. body language       D. thought

2.What does the author mainly want to say?

A. People can communicate in many different ways.

B. Everybody uses only one form of communication.

C. Language is invaluable to foreigners.

D. Non-spoken communication is of little value.

3.According to the text, which part of the body can be used to show you are joking?

A. Fingers B. Eyes      C. Head    D. Feet

4.What can’t be effectively communicated by sign language when people belong to different language groups?

A. Spelling        B. Idea       C. Whole words         D. Expressions

5.How many different forms of communication are mentioned in the text?

A. Three   B. Five       C. Six        D. Nine

高一英语阅读理解中等难度题查看答案及解析