题目列表(包括答案和解析)
请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。
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.
完形填空
The western world has always been divided into two types of people——the cool and the uncool. It is a division that __1__ in school. The cool kids are good at __2__. They are __3__ with the opposite sex. They are good-looking and people want to __4__ their style. They can do their homework but they don't make a big effort. That would __5__ be cool.
The uncool kids are in the other corner of the playground. They are very bright, but they don't have great. __6__ skills and they are __7__ at sports. When they are not programming computers or doing calculus(微积分)in their heads, they are reading comic books and watching shows like the“X Files”. They are __8__ as the geeks.
Here's the news. The geeks are __9__. Make friends with them now or they will put virus in your computer and __10__ your maths homework to ruin. Geeks might not be popular at school, yet they do pass their examinations, and they might not be too popular at university, but __11__ good degrees.
The most important __12__ of the 21st century, computers and IT, has been at least partly created by geeks. Geek heroes like Bill Gates __13__ others to follow their example. Being a geek is a way of earning good money. And the creation of the Internet gave them a __14__ of their own to work and play in, making them a global __15__. Besides, the effect of the geeks __16__ popular culture has started a new trend(趋势). It is now cool to be __17__. Geek culture is becoming an important part of general popular culture, in which what you know is more important than __18__ you look like.
But there are also __19__. Geeks were often bullied or laughed at in school. Now a geek may be your boss. Perhaps it is time for __20__.
(1)A.continues |
B.makes |
C.remains |
D.starts |
(2)A.computers |
B.studies |
C.sports |
D.maths |
(3)A.pleasant |
B.popular |
C.crazy |
D.average |
(4)A.copy |
B.advance |
C.take |
D.act |
(5)A.not |
B.indeed |
C.perhaps |
D.actually |
(6)A.speaking |
B.operating |
C.social |
D.experiments |
(7)A.speechless |
B.sharp |
C.active |
D.hopeless |
(8)A.known |
B.referred |
C.thought |
D.admired |
(9)A.taking on |
B.taking up |
C.taking over |
D.taking in |
(10)A.put |
B.cause |
C.bring |
D.serve |
(11)A.win |
B.take |
C.wish |
D.finish |
(12)A.industry |
B.discovery |
C.progress |
D.development |
(13)A.promise |
B.discourage |
C.demand |
D.excite |
(14)A.chance |
B.space |
C.world |
D.career |
(15)A.force |
B.company |
C.organizaiton |
D.department |
(16)A.of |
B.on |
C.in |
D.for |
(17)A.rich |
B.attractive |
C.handsome |
D.uncool |
(18)A.how |
B.that |
C.what |
D.how much |
(19)A.opportunities |
B.dangers |
C.possibility |
D.question |
(20)A.punishment |
B.argument |
C.competition |
D.employment |
For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
Indoor air pollution can cause a person to feel tired, to suffer eye-pain, headache and other problems. Some pollutants( 污染 物) can cause breathing disorders, diseases of blood and even cancer, Most scientists agree that every modern house has some kind of indoor pollution. People began to notice the problem in the early 1970s. It is that when builders began making houses and offices they did not waste energy. To do this they built buildings that limited the flow of air between inside and outside. They also began using manmade building materials. These materials are now known to let out harmful gases. As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building— green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and through its tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square metres of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.
Generally speaking, indoor air pollution may be more harmful than the air outside because ________.
A. the man - made building materials let out dangerous gases inside houses
B. there may be more harmful gases outside houses
C. the flow of air indoors is limited
D. indoor air pollution can make a person seriously ill
The most effective way to clean the air is to use different kinds of plants because________.
A. they may let out more oxygen which people need
B. they can absorb different kinds of the harmful indoor chemicals
C. they can take in all kinds of indoor pollutants
D. they can make your house prettier and more healthy
People need to relax and enjoy themse1ves.One way they can have a good time is to watch a baseball game or another sports event.Even thousands of years ago,groups of people gathered(聚集) to watch skilled athletes(运动员).
Over 2000 years ago in Greece,certain days in the year were festival days.These were holidays when people stopped work and enjoyed themselves.They liked to watch athletes take part in races and other games of skill.
The most important festival was held every four years at the town of Olympia.It was held in honor of the Greek god Zeus(Zus).For five days,athletes from all parts of the Greek world took part in the Olympic Games.At the Olympic Games,people could watch them box,run,jump and so on.There was a relay race between two teams of men in which a lighted torch(火矩)was passed from runner to runner.The Olympic Games were thought to be so important that cities which were at war with one another had to stop fighting.People were allowed to travel to the games safely.Thousands of people came to Olympia from cities in Greece and from her colonies(殖民地)in Africa,Asia and Italy.They met as friends to cheer their favorite athletes and to enjoy themselves.
【小题1】What happened in Greece over 2000 years ago?
A.People stopped work and enjoyed themselves. |
B.The cities there were often against one another. |
C.People watched baseball games. |
D.People didn’t go to any games at all. |
A.Friends. | B.Enemies. |
C.Colonies. | D.Other cities. |
A.They fought. | B.They just talked to friends. |
C.They cheered for good athletes. | D.They tried to find friends. |
A.Greece at War | B.Together for the Games |
C.Stop Fighting | D.Sport |
I don't think there is anything wrong with your blood. The key to your problem is that long nap(打盹,小睡)after dinner. If you didn't sleep for hours during the early part of the evening, you would be more ready to sleep at bedtime. If you didn't nap after dinner, you would not want to stay up so late, and you would not feel the need to take a sleeping pill. The pill is still working in your system when you get up in the morning. This helps account for the fact that you feel tired all day. You should get out of the habit of sleeping during the evening. Right after your evening meal, engage in some sort of physical activity - a sport such as bowling, perhaps. Or get together with friends for an evening of cards and conversation. Then go to bed at your usual time or a little earlier, and you should be able to get a good nights rest without taking a pill.
If you can get into the habit of spending your evenings this way, I am sure you will feel less tired during the day. At first it may be hard for you to go to sleep without taking a pill. If so, get up and watch television or do some jobs around your house until you feel sleepy. If you fall asleep and then wake up a few hours later, get up but do not take a sleeping pill. Read a while or listen to the radio, and make yourself a few hours'sleep that night, you will feel better in the morning than you usually feel after taking a pill. The next night you will be ready to sleep at an earlier hour.
The most important thing is to avoid taking that nap right after dinner and avoid taking pills.
1. According to the writer, it is difficult for you to go to sleep because .
A. you get the habit of staying up late B. you haven't taken sleeping pills
C. you sleep for hours after dinner D. you fail to do some exercises
2. Which of the following is NOT true if you want to get out of the habit of sleeping during the evening?
A. Go to bed earlier than usual. B. Talk with friends after dinner.
C. Stay with friends after dinner. D. Do some physical labor.
3. You feel tired all day probably because .
A. you stay up too late B. you get up too early in the morning
C. you take sleeping pills D. you wake up too frequently at night
4. Which of the following is true according to the passage
A. You mustn't take sleeping pills in order to get a good night's sleep.
B. You should stay up if you want to sleep effectively.
C. Food is necessary at night if you fail to go to sleep.
D. It is very important to get out of the habit of taking a nap after dinner.
5. We may infer that the author is most probably a .
A. doctor B. scientist C. reporter D. professor
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