colds are caused by cold weather. They are not. They are caused by viruses (病毒) passing on from person
to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has
one.
If cold weather causes colds, it would be reasonable to expect the Eskimos to suffer from them forever.
But they do not. And in isolated Arctic regions explorers (探险者) have reported being free from colds until
coming into contact again with the outside world by way of packages and mails dropped from airplanes.
During the First World War soldiers who spent long periods in the trenches, cold and wet, showed no
increased tendency to catch colds. In the Second World War prisoners at the notorious Auschwitz
concentration camp, naked and starving, were extremely surprised to find that they seldom had colds.
At the Common Cold Research Unit in England, volunteers took part in the experiments in which they
gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths,
they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in
drafty rooms. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not
one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If, then, cold and wet have nothing to do with catching colds, why are they more frequent (often) in the
winter? Despite the most painstaking research, no one has yet found the answer. One explanation offered by
scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes
it easier for cold viruses to be passed on.
No one has yet found a cure for colds. There are drugs and pain suppressors such as aspirin, but all they
do is to relieve the symptoms (症状).
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2. When may Arctic explorers catch colds?
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3. How many kinds of people does the writer mention when explaining his idea?
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4. Why are the colds more frequent in the winter?
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5. What is the key point of this passage?
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2. When coming into touch again with the outside world.
3. Five.
4. Because people like to stay indoors, and this makes it easier for cold viruses to be passed on.
5. Colds are not caused by cold weather. (Colds are caused by viruses, not by cold weather.)
(答案不唯一)
On March 27, Saturday evening, people all over the world once again tumed their lights off for an
hour to help fight against global climate changes and give the world a brighter future.
For Earth Hour 2010, many best-known buildings went dark from 8:30 to 9:30 local time, such as
the Eiffel Tower, Big Ben, Sydney"s Opera House and Beijing"s Forbidden City, etc. Millions of businesses
and homes around the world also tumed off their lights.
Some 4 000 cities in more than 120 countries volunteered to tum off Saturday to reduce energy
consumption (能量消耗). " We have everyone from Casablanca to the camps of Namibia and Tanzania
taking part," said Greg Boume, CEO of WWF ( World Wildlife Fund) in Australia, which started Earth
Hour.
Earth Hour began in Sydney, Australia, in 2007. In 2008, the event tumed into an intemational one,
which has drawn the participation of hundreds of towns and cities worldwide. Now in its fourth year, more
and more cities from the world took part in Earth Hour as a show of support for action against global
warming.
In a WWF survey after Earth Hour 2009, 80 million US citizens said they had participated, according to
Ann. " Earth Hour has always been an event about families and individuals as well," Ann said, " and it"s really
about Americans and people all over the world standing up and saying climate change is real and we need to
do something about it now. "
However, Earth Hour"s energy-saving influence is limited. But WWF says that Earth Hour"s real value is
symbolic (象征的).
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buses, planes and ships that need oil to work will not be able to run. So it will be necessary to develop a new
method of transport which doesn"t use oil. Electric vehicles are one possibility. In England, most families have
at least one car and this car is used every day. It could be that only one person in the family drives the car to
work or for shopping. The number of cars on the road perhaps helps to explain why the oil is used up so
quickly. The family car is a very useful form of transport but it is also a great waste of energy, especially if
it is compared with buses or trains which use less petrol per person than a car. A car traveling at 80 kilometers
an hour uses only half as much petrol as a car which is traveling at 120 kilometers an hour. Clearly, it would be better if there were fewer cars on the road and more speed limits so that the oil which is left will last as long
as possible.
About 25% of England"s total consumption (消耗) of energy is domestic - it is used only in the home. Just
over 20% is used for transport. Most of the energy is used in industry. It is difficult to suggest any possible
energy conservation (保护) in industry because many of the suggestions would mean that some people
would lose their jobs. It is important that industry produces the same amount of products using the same
amount of workers.
Clearly, conservation is not going to be the answer to the energy problem. The most it can do is to give
more time for a better method to be found. The more time we have to develop new sources of energy, the
better it is because there is still a lot of work to be done in order to find suitable, safe methods of producing
energy.
B. Fast driving.
C. On the road.
D. For family use.
B. A new system of transport will be developed.
C. They will be replaced by electric vehicles.
D. They waste a lot of energy.
B. Family cars can save much more energy than buses and trains.
C. It is possible for English people to develop vehicles.
D. Fewer cars on the road will help the oil last longer.
B. Vehicles mustn"t go at a high speed.
C. New sources of energy should be found and developed.
D. We should cut down the number of family cars on the road.
"I wasn"t afraid of running; I was afraid I might die," said Joyner-Kersee. "I said "Don"t be afraid. . . just
hold on."
So, what is asthma? It"s a health condition that causes difficulty in breathing. Although it comes and goes,
once you have asthma, you have it for a long time. Different treatments are used for asthma. There are very
strong drugs that can be taken for a long time with few side effects. Today, even people with serious asthma
can take part in sports.
Joyner-Kersee has had problems with asthma for many years. She said, "I didn"t have this as a little girl.
It wasn"t until I went to California that I noticed it, and then I didn"t want to accept it. When I start feeling
good, I stop taking the medicine. It will be all right. . . . I hope. "
The race was supposed to start at.5:35 p. m. At 5:00, she began to have trouble breathing. She was
given a breathing test and treatment by a doctor. She said she thought about not running. She was out of
breath.
"It"s just hard running with asthma," she said. "When I experienced this in practice. I couldn"t breathe.
It was really hard for me. " She said the problem with asthma is that you don"t know when it will happen.
She was fine when she arrived at the stadium. The breathing treatment helped her. Joyner-Kersee"s experience
shows that medical treatment is important. First, if you think you have asthma, see a doctor. Asthma drugs
can protect your lungs. Second, pay attention to your health. Tell your doctor immediately if you wake up and
have trouble breathing. This means the condition is getting worse. Many people don"t want to be known to
have asthma, and then they must go to the hospital.
Most importantly, remember that with asthma, you can have a normal life. You can even win an Olympic
gold medal.
_________________________________________________________________
2. What is asthma?
_________________________________________________________________
3. When did Joyner-Kersee first find she had asthma?
_________________________________________________________________
4. How can you tell your asthma is getting worse?
__________________________________________________________________
5. What do you think is the writer"s purpose of writing the passage?
__________________________________________________________________
out. When they bought things, they used to carry shopping baskets. But now we don"t reuse things well and
more rubbish has been produced. We throw away 25 million tones of waste in our dustbins (垃圾箱) every
year. That means one family throw away about one thousand kilos of waste.
We have a strong reason to take it as a serious problem! The fact is that lots of rubbish we throw away
could be reused or recycled (回收利用). The so-called rubbish isn"t really rubbish.
The UK is one of the worst recyclers in Europe. In other words, in the UK, they"re recycling only about
8% of their everyday waste. That"s much less than many other countries. Germany recycles 10%, while
Japan recycles 40%. The govemment has set a goal of recycling 30% of their everyday waste by the year
2010. But it looks that it is not easy to reach it. As we know, some habits are difficult to change and some
collection plans are expensive to carry out.
At present, the movement called Recycle Now in the UK tries to change that situation. The Top designer
(设计师) Oliver Heath is a strong fan of the movement. In 2005 he designed the first home built completeiy
from recycled things, including metal cans and glass bottles. "It always makes me excited when I make good
use of those recycled things," he said, " Maybe in the near future, you can also make something from recycled
computer printers, plastic bags, bottle tops or CDs." When his story was reported on TV, more and more
people begin to try his ideas.
Some local (地方的) govemments have set up recycling centres where it"s easy for families to take their
empty bottles and old newspapers. Instead of throwing away the so-called rubbish, some families start doing
more about it.
With the effort of the whole country, we are happy to see some progress in some places in the UK.
_________________________________________________
2. Why does the writer think rubbish is a serious problem?
_________________________________________________
3. Which country recycles more than 10%, Cermany or Japan?
_________________________________________________
4. How does Oliver Heath feel when he turns recycled things into something useful?
_________________________________________________
5. What conclusion (结论) can you get about the recycling work in the UK?
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Keep in mind that you can have too much of a good thing: over-exercising and exercising in a wrong way can
hurt your body. The following suggestions can help you avoid this.
Warm up before exercise. This helps to prepare your body for activities. It"s especially important in the
morning.
Cool down after exercise. Rather than stop immediately, do a few gentle (轻柔的) activities to avoid aches
and pains (疼痛) later. Exercise with your limits (极限). Build up slowly. Pain is a waming, so never try to
work through it.If you don"t listen to your body, you will hurt yourself. Avoid being thirsty. Water is important
to keep your normal temperature during exercise and prevent tiredness. Wear sports shoes. These shoes can
protect your feet and prevent you from being hurt.
B. Four.
C. Five.
D. Six.
B. Ask our doctor for advice.
C. Have a health examination.
D. Go over these suggestions.
B. Cooling our body down.
C. Drinking enough water.
D. Putting on sports shoes.
B. To avoid aches or pains later.
C. To keep normal temperature.
D. To avoid hurting ourselves.
- 1质量为m的物体,由静止开始下落,由于阻力的作用,下落的加速度为4g/5,在物体下落高度为h的过程中,下列说法正确的时(
- 2I _________ Lucy to be careful with her handwriting all the
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