题目
题型：同步题难度：来源：
of global warming. But scientists have warned that as the hole closes up in the next few decades,
temperatures on the continent could rise by around 3C on average, with melting ice contributing to a
global sea level increase of up to 1. 4 metres.
In the past decades the western Antarctic has seen rapid ice loss as the world has warmed,but the
other parts of the continent have, paradoxically, been cooling,resulting in a 10% increase in ice in the seas
around the region. This is because the hole in the ozone layer has increased cold winds in Antarctica,
making much of the continent surface colder than usual.
But now that the gasses that cause the ozone hole have been banned, scientists expect the hole to
repair itself within the next 50 to 60 years. By then the cooling effect will have faded out and the
Antarctic will face the full impact of global warming. This means an increase in average air temperatures
of around 3? and a reduction in sea ice by around a third.
The biggest threat to the continent comes from warming seas. Robert Johnson, a scientist who
monitors Antarctica ice sheets, said, "The ice sheets in Antarctica are hundreds of metres thick. But
once warm ocean waters start flowing underneath, the ice will begin thinning and could break up very
quickly. " Thinning ice sheets cause ice to break away from the continent and to melt even faster.
Escaping ice from western Antarctica has already resulted in a 10% rise in global sea level in recent
decades.
Johnson believes that international action to reduce global warming is required immediately or it may
be too late. "Everything is connected-Antarctica may be a long way away but it is an important part of
the Earth"s system," said Johnson. "It contains 90% of the world"s ice, 70% of the world"s fresh water
and that is enough, if it melts completely,to raise sea levels by 63 metres. "
Even in a worsecase situation scientists don"t expect the ice to entirely disappear,but predict that,
because of the melting ice sheets,average sea level rise will be around 1. 4 metres higher by the end of
the century.
B. approximately
C. contradictorily
D. apparently
B. It is causing the ice to melt faster.
C. It is making the effects of global warming in the region worse.
D. It is reducing the amount of water in Antarctica.
B. Warming sea water temperature.
C. Water pollution.
D. Growing ice sheets.
B. The average temperature has increased by 3 degree centigrade in recent decades.
C. Antarctica is currently experiencing the full effects of global warming.
D. Ten percent of Antarctica"s ice has already been lost.
B. Antarctica melting away
C. Action plan to save Antarctica
D. Let"s save the ozone layer
答案
核心考点
试题【 The hole in the Earth"s ozone layer (臭氧层)has until now protected Antarctica】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
have sleeping problems a few nights each week, according to a recent study by the National Sleep
Foundation. Sleeping too little can lead to a higher risk of becoming fat and getting depressed(沮丧的).
But before you go to a doctor for advice, it is worth examining your sleeping habits one more time. Some
of your favorite evening habits may have something to do with the sleeping problems.
1.Setting a Bright Alarm Clock.
The light of your bright alarm clock can prevent you from falling asleep. You can make your room as
dark as possible. Cover the bright numbers with a book or consider buying a small travel clock. Your
cellphone alarm may also do the trick.
2.Counting Sheep
When you just can"t fall asleep, it"s useless to stay in bed to count sheep. If you"ve been trying to fall
asleep for more than 30 minutes, the National Sleep Foundation suggests you get up to do some reading or watch TV for a while. Such activities will make you sleepy. Before you know it, you"ll be going back to
bed really tired.
3. Exercising Late at Night
Daytime workouts(锻炼) will keep you full of energy for hours. That"s why you don"t want to exercise within three hours of hitting the sack. Fierce(剧烈的)physical activity raise your body temperature and
pumps your energy level-both are bad for a good night"s sleep.
A. It"s not good to fail to fall asleep at night.
B. People in a good company often have sleeping problems.
C. There are many people who have sleeping problems.
D. You should find someone to talk to if you can"t fall asleep.
2. The underlined part "hitting the sack" in the last paragraph means "_____".
A. going back home
B. going to bed
C. going to the gym
D. falling asleep
3. Which of the following is NOT mentioned in the passage?
A. The bad results of getting too little sleep.
B. Why the bright alarm clock keeps you awake.
C. What to do if you can"t fall asleep after 30 minutes.
D. Why watching TV and reading books make people sleepy.
4. By writing the passage, the writer mainly wants to tell us _____.
A. why so many people can"t sleep well at night
B. how to enjoy a good night"s sleep
C. that sleeping problems are troubling more and more people
D. that people may solve their sleeping problems by some habits
away our money, houses, cars, or even our clothes, we can still survive__1__That is why we always tr
y to eat in a healthy way and exercise regularly.How can we keep healthy? In order to eat healthily, I usually avoid eating food high in fat, like French
fries or cookies, which are junk foods__2__Besides, I only eat little meat.
__3__ Taking exercise every day helps us build a strong body. Regular exercise is an important part of
keeping me healthy.
What"s more, I think friends are an important part of one"s health__4__I always feel better when I am
with friends than when I am alone. When I am with my friends, I always laugh. Laughing is also an
important part of health. It is good to stay with my friends.
By eating properly and exercising regularly, I can keep my body at a proper weight and keep healthy. By spending time with my friends, I can keep my mind as well as my body happy. These things sound easy to do, but not many people can manage them__5__
A. Many studies show－ that people with a narrow range of social contacts
often get sick.B. There, are some people who like staying alone, but they keep healthy.
C. On the other hand, doing exercise is very important.
D. But if our health was taken away, it is certain that we would surely die.
E. I think a strong will is necessary if we want to keep healthy.
F. I eat a lot of vegetables and fresh trust fruit which are full of vitamins.
G. Some people appear fat because they often eat too much.
sity of Warwick has built what it calls the world"s first completely environmentally friendly Formula Three racing car.
The car is made mainly of renewable materials, like plants and vegetables.The structure around the car is made from natural plant fibers and potatoes.The steering wheel (方向盘) is made from root ve
getables like carrots.The engine uses biofuel made from vegetable oil and waste chocolate.The new racing car is extremely fast.The car has a top speed of two hundred fifteen kilometers an hour.And it can go from zero to ninetyfive kilometers an hour in just two and a half seconds.The racing car
meets all of the Formula Three racing requirements except for its biodiesel(生物柴油) engine.
Automobile racing is one of the most widely watched sports in the world.But it is also considered one
of the least friendly sports to the environment.Racing car
s burn a lot of fuel, and create a lot of air pollution.In recent years, the racing industry has taken steps to protect the environment.More racing compan
ies are now producing cars that use less energy.These cars produce less pollution than cars that depend on traditional fuel, like gasoline.
Last month, the new racing car was set to run in its first competitive race at the Formula Three
Championship Final at Brands Hatch.It would have been the first biodieselpowered car to
race at Formula Three.Current Formula Three rules let only gasolinepowered car to compete.Officials needed permission from all of the Formula Three racers for the biodieselpowered car to compete.They were unable to contact one of the drivers, so the new racing car didn"t appear in the event.In test runs, the new racing car was the fifth fastest among the Formula Three race cars.Supporters are hopin
g to have the fuel problem solved in time to compete in the next season.
A. What materials the new racing car is made of.
B. Why researchers built the new racing car.
C. The characteristics of the new racing car.
D. The process of the new racing car being designed.
2. According to the passage, the________of the new racing car doesn"t meet the Formula Three racing
requirements.
A. speed
B. appearance
C. weight
D. engine
3. It can be inferred from the passage that________.
A. the new racing car is the first environmentally friendly car
B. automobile racing could be forbidden in the near future
C. many people like to watch automobile racing
D. the new racing car will be allowed to compete in the next season of Formula Three racing
4. In recent years, racing companies are producing cars that ________.
A. burn more fuel
B. go more quickly
C. produce less pollution
D. cost less money
own carbon footprints(碳排放量), says Ryan Brook, a researcher who regularly flies north to study the
health of caribous (驯鹿). He calls on scientists to show leadership by examining and sharing ways to
reduce the impact of working in polar regions.
"The importance of the research is not at question here. It is important to our understanding of and
adapting to climate change. But we need to think about better approaches." says Brook.
"This is an issue for all scientists, though polar researchers often travel particularly long distances
using commercial air travel. We also rely extensively on small aircraft, icebreakers, and snowmobiles, all
of which produce large amounts of carbon. "
Brook studies the health of caribous herds in Nunavut and Northwest Territories. He works with
northern wildlife managers. This work typically takes him north five or six times per year and when he
calculated his own carbon footprint, he was not happy with the result.
"My research footprints are about the same as the annual footprints of an average Toronto resident.
Basically, I have two footprints-my own personal life, which is moderate, and my research footprint."
Climate scientists can rightly argue that Arctic research is a specialized field and the community of
scientists who travel north is relatively small. Even if all scientists working in the north reduced their
carbon emissions, it would not make a big impact on the global scale. For Brook, it"s the option that
matters.
There are ways researchers can reduce the amount of carbon they use. Some helicopters use less
fuel than others. Solar and wind power are alternatives to gasfired generators. And while carbon offsets
(抵消) don"t reduce the amount of carbon emitted, they ar
e an easy first step. "There aren"t necessarily any easy answers, but we need to start talking about it." says Brook. "This is
particularly important for the next generation of scientists being trained and I hope to see them become
leaders in this issue."
B. the study of the health of caribous
C. the impact of working in polar regions
D. the reduction of polar scientists" carbon emissions
B. His personal life footprints are more than the annual footprints of a Toronto resident.
C. His research footprints are about the same as his personal life footprints.
D. His personal life footprints are more than his research footprints.
B. the Arctic is a special environment
C. the footprints of Arctic scientists are small
D. Brook"s situation is not a common phenomenon
B. it"s easy to start talking about the problem of carbon emissions
C. it"s necessary now to pay attention to the problem of research footprints
D. the next generation of scientists are more interested in research footprints