Pollutants coming from automobile operation have begun to cause many environmental problems. It has been calculated, for example, that 70% of the carbon monoxide(一氧化碳), 45% of the nitrogen oxides(氮氧化合物), and 34% of the hydrocarbon (碳氢化合物) pollution in the United States can be traced directly to automobile exhausts (废气). In addition, rubber, motor oil and other materials accumulate on roadways and are washed into streams, with effects nearly as serious as those of untreated waste water.
In an effort to improve the situation, the U.S. government has made regulations on the use of the constituents (成分) of automobile exhaust gas that are known to cause air pollution. These constituents fall roughly into three types: hydrocarbons that pass through the engine unburned; carbon monoxide, also a product of incomplete burning; and nitrogen oxides which are formed when nitrogen and oxygen are in contact at high temperatures. Besides their own poisonous character, hydrocarbons and nitrogen oxides react in the presence of sunlight to form harmful smog. Carbon monoxide and hydrocarbons are rather easily controlled by the use of higher burning temperatures in engines. Unfortunately, the conditions that produce minimum emission of hydrocarbons tend to raise emission of nitrogen oxides. In a way this difficulty is solved by adding recycled exhaust gas to the fuel mixture, thus avoiding the oversupply of oxygen that favors formation of nitrogen oxides.
California, which has the most strict air-pollution laws in the United States, requires further special compounding of gas to control emissions, and several states have ordered that alcohol be mixed with gas, as this will reduce emissions of the carbon monoxide by 35 per cent and the hydrocarbons by 15 per cent.
【小题1】The author uses figures in Paragraph 1 ________.
A.to reflect the rapid growth of automobile use |
B.to highlight the importance of environment protection |
C.to show the consequence of automobile exhausts |
D.to criticize the low quality of cars |
A.Nitrogen and oxygen are put together in great heat. |
B.Carbon monoxide and oxygen are mixed together. |
C.Hydrocarbons pass through the engine. |
D.Nitrogen is burned incompletely. |
A.Carbon monoxide can be controlled in the engine. |
B.Smog will form when hydrocarbons meet nitrogen oxides in the sunlight. |
C.Hydrocarbons have no poisonous character themselves. |
D.The conditions that decease emission of hydrocarbons will increase emission of nitrogen oxides. |
A.increase awareness of environment protection |
B.control air pollution |
C.increase the fuel efficiency |
D.replace gas gradually |
【小题1】C
【小题2】A
【小题3】C
【小题4】B
解析试题分析:文章介绍现在因为汽车尾气的排放,空气受到严重的污染,文章分析汽车尾气的成分和它们的危害,同时介绍解决空气污染问题的方法。
【小题1】细节题:从第一段的句子:that 70% of the carbon monoxide(一氧化碳), 45% of the nitrogen oxides(氮氧化合物), and 34% of the hydrocarbon (碳氢化合物) pollution in the United States can be traced directly to automobile exhausts (废气). 可知这些数字表明汽车废气的后果,选C
【小题2】细节题:从第二段的句子:nitrogen oxides which are formed when nitrogen and oxygen are in contact at high temperatures.可知 氮氧化合物和碳氢化合物是通过热量结合的,选A
【小题3】细节题:从第二段的句子:Besides their own poisonous character, hydrocarbons and nitrogen oxides react in the presence of sunlight to form harmful smog. 可知碳氢化合物本身也是有毒的,选C
【小题4】细节题:从最后一段的句子:states have ordered that alcohol be mixed with gas, as this will reduce emissions of the carbon monoxide by 35 per cent and the hydrocarbons by 15 per cent. 可知把酒精加入到汽油里面,是为了减少空气污染。选B
考点:考查环保类短文
科目:高中英语 来源: 题型:阅读理解
My house is made out of wood, glass and stone. It is also made out of software.
If you come to visit, you’ll probably be surprised when you come in. Someone will give you an electronic PIN (个人身份号码)to wear. This PIN tells the house who and where you are. The house uses this information to give you what you need. When it’s dark outside, the PIN turns on the lights nearest you, and then turns them off as you walk away from them. Music moves with you too. If the house knows your favorite music, it plays it. The music seems to be everywhere, but in fact other people in the house hear different music or no music. If you get a telephone call, only the nearest telephone rings.
Of course, you are also able to tell the house if you want something. There is a home control console (控制台), a small machine that turns things on and off around you.
The PIN and the console are new ideas, but they are in fact like many things we have today. If you want to go to a movie, you need a ticket. If I give you my car keys, you can use my car. The car works for you because you have the keys. My house works for you because you wear the PIN or hold the console.
I believe that ten years from now, most new homes will have the systems that I’ve put in my house. The systems will probably be even bigger and better than the ones I’ve put in today.
I like to try new ideas. I know that some of my ideas will work better than others. But I hope that one day I will stop thinking of these systems as new, and ask myself instead, “How will I live without them?”
【小题1】What does the passage mainly discuss?
A.How to develop a new system. | B.The function of the PIN. |
C.A home for the future. | D.Easy life in the future. |
A.To let readers know why his ideas are new. |
B.To let readers know how special his house is. |
C.To explain the importance of the PIN and the console. |
D.To explain more easily what the functions of the PIN and the console are. |
A.An IT expert. | B.A famous doctor. |
C.An idealist | D.An experienced teacher. |
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科目:高中英语 来源: 题型:阅读理解
I give two examples as to why intelligent life may not actually exist, though I admit that for me, or even for a physicist who devoted his or her entire life to researching and studying the universe, it's shocking to claim that completely no life exists elsewhere.
Keeping that in mind, I'd just like to consider conditions elsewhere in the known universe. You really only need to look at our own solar system or the Earth at certain periods in its own history to appreciate that most places are much worse and much less suitable for life than our mild, watery globe.
So far, space scientists have discovered about seventy planets outside the solar. But it appears that if you wish to have a planet suitable for life, you just have to be very lucky, and the more advanced the life is, the luckier you'll have to be. I'm by no means a space observer, but I can recognize some particularly fortunate breaks we've had on the Earth. For example:
We are, to a degree, at the right distance from the perfect type of star, the one that is big enough to radiate a huge amount of energy, but not so big as to bum itself out quickly. Had our sun been ten times as huge, it would have burnt out completely after only ten million years, instead of ten billion and surely we would not exist. Too near, everything on the Earth would have boiled and withered away; any further, everything would have frozen over.
The universe is a surprising place, and our existence within it is a wonder. If a long and unimaginably complex sequence of events dating back 4.6 billion years or so hadn't happened in a particular manner at a particular time --if, to take just one example, the dinosaurs hadn't been wiped out by a meteor(流星)--we might still be a few centimeters long, with whisker(胡须) and a tail, and you'll be reading this in a cave somewhere.
【小题1】What's the best title for this passage?
A.No Life Exists out of the Earth |
B.Seventy Planets Discovered |
C.A Place Full of Wonders |
D.Perfect Conditions for Life |
A.The Earth is the only planet that can receive energy from the sun. |
B.The sun is at the right distance from us and in proper size. |
C.The distance between the planets was neither too long nor too near. |
D.The dinosaurs were no longer a threat to the Earth. |
A.Exploded. | B.Expanded. | C.Floated away. | D.Dried and died. |
A.A history book. | B.A magazine. | C.A science fiction. | D.A famous novel. |
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科目:高中英语 来源: 题型:阅读理解
How to Tell If Someone Is Happy or Sad on the Phone
Scientists have come up with some researches on what makes different types of people“tick”.
The scientists at the University of Cambridge have developed new mobile phone technology called Emotion Sense that can tell if a caller is happy, angry or sad.
Scientists hope to fit the speech recognition system to standard mobile phones and use it to determine emotions—it will also use a GPS tracking system to log where the call is made.
And they’ve already made some pretty major breakthroughs into really getting under the skin of us humans.
The results from the pilot scheme make interesting scientific reading. Among the key revelations (﹦facts) are that callers feel happier at home and sadder at work.
To break it down, scientifically, it shows 45 percent of all emotions produced at home are “happy”and 54 percent of emotions at work are “sad”.
Meanwhile, people show more “intense”(﹦nervous) emotions in the evening than they do in the morning.
Of course, this could just be because most people feel too tired in the morning to get overly “intense”. Eating breakfast and getting to work on time is usually enough of an achievement.
Anyway, the Emotion Sense technology has been developed by psychologists(心理学家) and computer scientists who say it uses speech recognition software and phone sensors(传感器) attached to standard smart phones to judge how callers’ emotions are changed by everyday factors.
The sensors analyze voice samples and these are then divided into five categories: happiness, sadness, fearfulness, anger or neutral-—boredom or passivity(消极) would fit into this last category.
【小题1】How many emotions can the sensors tell?
A.Two | B.Three | C.Four | D.Five |
A.Scientists have put something testing people’s emotions under humans’ skin. |
B.There were some breakthroughs in this technology in getting something from people’s skin. |
C.In this technology, people’s skin was broken through. |
D.There were improvements in testing people’s emotions. |
A.Because morning is the start of a new day. |
B.because they feel too tired in the morning. |
C.Because of humans’ physiological structure. |
D.Because of the fresh air and bright sunlight. |
A.Speech recognition software. | B.Phone sensors. |
C.GPS sensors. | D.Translation system. |
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科目:高中英语 来源: 题型:阅读理解
Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Evidence shows that windmills(风车) began to be used in ancient Iran back in the seventh century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power.
For many centuries, people used windmills to grind(碾碎) wheat into flour or pump water from deep underground. When electricity was discovered in the late 1800s, people living in remote areas began to use them to produce electricity. This allowed them to have electric lights and radios. However, by the 1940s when electricity was available to people in almost all areas of the United States, windmills were rarely used.
During the 1970s, people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would not last forever. Then, wind was rediscovered, though it means higher cost. Today, there is a global movement to supply more and more of our electricity through the use of wind.
【小题1】From the text we know that windmills________.
A.were invented by European armies |
B.have a history of more than 2,800 years |
C.used to supply power to radio in remote areas |
D.have rarely been used since electricity was discovered |
A.Sailing a boat. |
B.Producing electricity. |
C.Grinding wheat into flour. |
D.Pumping water from underground. |
A.wind power is cleaner |
B.it is one of the oldest power sources. |
C.it was cheaper to create energy from wind |
D.the supply of coal and gas failed to meet needs |
A.The advantages of wind power. |
B.The design of wind power plants. |
C.The worldwide movement to save energy. |
D.The global trend towards producing power from wind. |
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科目:高中英语 来源: 题型:阅读理解
Have you dreamed of building your own machine? Do you wish you could invent something new? Here we look at a few British inventions of recent times.
Adaptable glasses
Do you wear glasses? If so, can you imagine life without them? In 1985, Joshua Silver, a professor at Oxford University, asked himself, “Can I invent a pair of glasses that could be changed by the wearer?” He designed two plastic lenses(透镜)that are filled with a special liquid. Using syringes(注射器)you change the liquid between the lenses until you can see clearly. The glasses are not beautiful but they are easy to use and cheap to make.
The wind-up radio
When you switch your TV on tonight, think about all those people without electricity. Thinking about this, Trevor Baylis came up with the idea of designing a radio that could be powered by hand. In common with Joshua Silver he wanted his invention to be cheap and easy to use. He wanted even the poorest people in developing countries, who don’t have electricity and cannot afford batteries, to use it. The radio has a generator (发电机) which is powered by turning a handle. In 1996 it won a BBC Design Award for Best Protect and Best Design.
The Dyson cleaner
In many homes around the world you can see a cleaner that looks like a spaceship. This is the Dyson vacuum (真空) cleaner which uses something called “cyclonic separation” to separate the dirt. You do not need a bag for your cleaner and it does not get blocked so it is very practical. The idea came to Sir James Dyson after he kept having problems with his vacuum cleaner. He decided he could design a better one and in 1993 he opened his own factory. The Dyson is now one of the best-selling cleaners in the UK and Dyson is believed to have earned over a billion pounds.
The Zapata fly-board
Ever dreamed of zooming through the water and leaping in the air like a dolphin? Now you can thanks to a fly-board, built by water sports enthusiast Frank Zapata. With it you can dive back in the water and out again. It’s possible to jump to incredible heights out of the water — over 30 feet. The basic fly-board model comes in at £4,200.
So keep dreaming and inventing. One day you might get it right.
【小题1】What can we learn about Adaptable glasses?
A.They are very expensive. | B.The inventor is a student. |
C.The glasses are fragile. | D.They don’t look very nice. |
A.Adaptable glasses. | B.The wind-up radio. |
C.The Dyson cleaner. | D.The Zapata fly-board. |
A.helping people use cleaners more easily |
B.making Dyson a rich businessman |
C.keeping the house cleaner than before |
D.taking the place of human cleaners |
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科目:高中英语 来源: 题型:阅读理解
Kelly Reeves was getting ready for a trip when her phone slipped into a sink full of water. Panic moment! She quickly picked up the wet phone and tried to turn it on, but nothing worked. Her first reaction? She got dressed, drove to the nearest store, and bought a new mobile at full price.
A new study finds that fear of losing your phone is a common illness. About 66 percent of those surveyed suffer from nomophobia or “no mobile phone phobia”. Interestingly, more women worry about losing their phone than men.
Fortunately, there’s a solution.
The first step is to figure out if you have nomophobia. Checking your phone too often is one thing, but the true sign of a problem is that you can’t conduct business or go about your routine when the fear becomes so severe.
Do you go to unusual lengths to make sure you have your phone? That’s another sign of a problem. If you find you check your phone plenty of times per hour, or a total of an hour per day, there may be a problem.
Some of the treatments are similar to those for treating anxiety attacks: leaving the phone behind and not checking e-mail or text messages, and then learning to tolerate the after anxiety. Even if this leads to a high level of worry and stress, the solution is to push through the fear and learn to deal with not having your phone.
Of course, there are also technological alternatives. Luis Levy, a co-founder at Novy PR, says he uses an application called Cerberus that can automatically track the location of his phone. To find it, he can just go to a website and see the phone’s location.
He also insures his phone through a service called Asurion. The company’s description of its product reads like a prescription for anxiety:“60 million phones are lost, stolen or damaged each year. You’ll have complete peace of mind knowing that your phone is protected and you can quickly reconnect with family, friends and work, as soon as the very next day!”
【小题1】Why does the author mention Kelly’s experience in the first paragraph?
A.To introduce the topic for discussion. |
B.To inform us that mobile phones are useful. |
C.To warn us that we should be careful. |
D.To tell us we should get phones ready for a trip. |
A.habits of using mobile phones |
B.fear of losing mobile phones |
C.eagerness for new mobile phones |
D.independence of mobile phones |
A.Avoiding using a phone for some time |
B.Learning more about modern technology |
C.Protecting one’s phone against any damage |
D.Not using a mobile phone in one’s daily work |
A.Attitude toward mobile phones |
B.New mobile phone technology |
C.Disadvantages of mobile phones |
D.Solutions to nomophobia |
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科目:高中英语 来源: 题型:阅读理解
NOT all memories are sweet. Some people spend all their lives trying to forget bad experiences. Violence and traffic accidents can leave people with terrible physical and emotional scars. Often they relive these experiences in nightmares.
Now American researchers think they are close to developing a pill, which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce ,or possibly erase(抹去) the effect of painful memories.
In November, experts tested a drug on people in the US and France. The drug stops the body releasing chemicals that fix memories in the brain. So far the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.
The research has caused a great deal of argument. Some think it is a bad idea, while others support it.
Supporters say it could lead to pills that prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer from terrible memories.
"Some memories can ruin people's lives. They come back to you when you don't want to have them in a daydream or nightmare. They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry at Harvard Medical School. "This could relieve a lot of that suffering."
But those who are against the research say that changing memories is very dangerous because memories give us our identity (特质). They also help us all avoid the mistakes of the past.
"All of us can think of bad events in our lives that were horrible at the time but make us who we are. I'm not sure we want to wipe those memories out, "said Rebecca Dresser, a medical ethicist.
【小题1】The passage is mainly about ________.
A.a new medical research |
B.a new invention of the pill |
C.an argument about the research on the pill |
D.a way of erasing painful memories |
A.prevent body producing certain chemicals |
B.cause the brain itself to recover memories |
C.help people remember the memories |
D.wipe out the emotional effects of memories |
A.the pill will prevent people's bad experiences |
B.people argue about the effects of the pills |
C.taking the pill will do harm to people's health |
D.the pill has probably been produced in America |
A.Some memories can help avoid the mistakes made in the past. |
B.Changing memories is very dangerous. |
C.Experiencing bad events makes us different from others. |
D.The pill will reduce people's sufferings from bad memories. |
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科目:高中英语 来源: 题型:阅读理解
People who multitask all the time may be the worst at doing two things at once, a new research suggests. The findings, based on performances and self-evaluation by about 275 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted and can’t focus on one activity. And “those people turn out to be the worst at handling different things,” said David Sanbonmatsu, a psychologist at the University of Utah.
Sanbonmatsu and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking (寻求刺激) or imperative (冲动) they were. They then evaluated the participants’ multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.
Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cellphone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted.
“People multitask not because it’s going to lead to greater productivity, but because they’re distractible, and they get sucked into things that are not as important.” Sanbonmatsu said.
Adam Gazzaley, a researcher at the University of California, San Francisco, who was not a member of the research group, said one limitation of the study was that it couldn’t find out whether people who start out less focused tend toward multitasking or whether people’s recognizing and understanding abilities change as a result of multitasking.
The findings do suggest, however, why the sensation-seeker who multitask the most may enjoy risky distracted driving. “People who are multitasking are generally less sensitive to risky situations.” said Paul Atchley, another researcher not in the group. “This may partly explain why people go in for these situations even though they’re dangerous.”
【小题1】The research led by Sanbonmatsu indicates that people who multitask __________.
A.seek high productivity constantly |
B.prefer handling different things when getting bored |
C.are more focused when doing many things at a time |
D.have the poorest results in doing various things at the same time |
A.assessed the multitasking ability of the students |
B.evaluated the academic achievements of the students |
C.analyzed the effects of the participants’ tricky mental tasks |
D.measured the changes of the students’ understanding ability |
A.limited power in calculation |
B.interests in doing things differently |
C.inability to concentrate on one task |
D.impulsive desire to try new things |
A.drive very skillfully |
B.go in for different tasks |
C.fail to react quickly to potential dangers |
D.refuse to explain the reasons for their behavior |
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