London
London’s flood defences are getting older. Since 1982, the Thames Barrier(水闸)has protected the city from the threat of flooding, but it was only designed to last until 2030 and close once every two or three years. About 26 years later the barrier now closes five or six times a year and according to Environment Agency predictions, by 2050 the barrier will be closed on almost every tide if the problem is not addressed.
There are 26 underground stations, 400 schools, 16 hospitals, an airport and 80 billion worth of property in London’s flood risk area, so large scale flooding would be disastrous.
Paris
Over a six week period in July and August 2003, more than 1 1,400—mainly elderly people—died in France from dehydration(脱水)and extremely high body temperature in a deadly heat wave. Heat waves of similar intensity(强度)are expected every seven years by 2050, so what can be done to make sure such a disaster does not happen again?
One solution is to have air-conditioners installed in elderly care homes. But this is considered a short-term solution, as the increase in demand for electricity also increases carbon emissions(排放).
In Paris the local authorities are encouraging architects to design new types of buildings such as the building “Flower Tower,” which uses a covering of bamboo to act as a natural air-conditioner.
Shanghai
Shanghai is the fastest growing city on Earth. It has a population of 18 million and is only 4 meters above sea level. Sea levels are predicted to rise by 20 cm within the next century.
An estimated 250，000 people move to Shanghai every year in search of work, placing extra demands on energy consumption. China relies heavily on coal—fired power stations, but these emissions increase temperatures and, in turn, warmer seas increase the risk of typhoons.
1. What problem should be settled now in London?
| A．How to protect the city’s property |
| B．Where to build its flood defences |
| C．How to use the Thames Barrier to protect the city |
| D．How to improve the function of the old flood defences |
| A．Putting up new types of buildings with a covering of bamboo |
| B．Having air-conditioners installed in elderly care homes |
| C．Forbidding the city to build“Flower Tower” |
| D．Encouraging architects to design new types of buildings |
| A．increasing population and coal-fired power stations |
| B．rising sea levels and typhoons |
| C．extremely high temperature and rising sea levels |
| D．extra demands on energy consumption and typhoons |
| A．to tell us how to protect the big cities |
| B．to give advice on how to defend natural disasters |
| C．to explain what causes flood and heat waves |
| D．to warn us of the increasing natural disasters in big cities |
| A．Big Cities Facing Big Disasters |
| B．Big Disasters in the Future |
| C．The Increase of Natural Disasters |
| D．Solutions to Natural Disasters |
相似题推荐
【推荐1】When we think about giving help to developing countries, we often think about giving money so that these countries can build schools and hospitals, buy food and medicine, or find clean water supplies. These seem to be the most important basic needs of the people we are trying to help. However, it's far from enough. Nowadays, we’ve got to come up with better ideas to help them.
A man called Nicholas Negroponte invented a cheap laptop computer that can run without electricity. The laptop is a little different from the normal laptop computers. One difference is that it is covered in rubber so that it is very strong and won't be damaged easily. As an electricity supply can be a problem in developing countries, the computer also has a special handle so that children can wind the computer up to give it extra power when needed.
These special laptop computers will cost less than 100 dollars and Mr. Negroponte wants to build as many as 15 million machines in the first year of production. The idea is that these computers will help the children's education as they will be able to access the Internet. These computers might not help the people in developing counties immediately, but by improving children’s education, they should help people to find their own solutions to their problems in the long term.
Another idea to help children in developing countries is to recycle old mobile phones so that they can be used again. In the UK and many other countries, millions of mobile phones are thrown away every year. The waste created by throwing away these old phones is very bad for the environment, so it seems like an excellent idea to recycle them. In this way we will be able to achieve two important goals at the same time. We will reduce the waste we produce and help others. In other words, we will be able to “kill two birds with one stone”, and that is always a good thing.
1. What can we learn about the laptop computer invented by Nicholas Negroponte?| A．It can work without electricity. | B．It is covered with plastic. |
| C．It will cost over 100 dollars. | D．It helps developing countries at once. |
| A．Blow hard to make the computer work. | B．Turn the handle to make the computer work. |
| C．Push hard to make the computer work. | D．Bend the handle to make the computer work. |
| A．It reduces rubbish and can benefit others. |
| B．It prevents pollution and can earn lots of money. |
| C．It is good for the environment and very educative for phone users. |
| D．It is a way to send the waste from developed countries to other countries. |
| A．The Benefits of Recycling Cellphones |
| B．Special Computers Providing Solutions |
| C．New Ways of Helping Developing Countries |
| D．High Technology Improving Children's Education |
【推荐2】Each year, the discovery of new shark species underlines how little we know about ocean biodiversity. In a recent report conducted by Sibert and Rubin, they reported an unexpected finding: a large-scale extinction of sharks in the pelagic ocean, the largest ecosystem on Earth, about 19 million years ago. Their discovery suggests that some extinctions in the open sea of the past may have been mysterious.
The study of Sibert and Rubin takes advantage of a system by using tiny, hard bits of shark skin and bony fish teeth that naturally fall from their bodies to the seafloor. These extremely small fossils provide a rich record of ancient oceanic sharks and their abundance for thousands of years. By studying fossils from many regions, the diversity patterns can give major insights into evolution (进化) of the open sea that would be otherwise unknown.
Sibert and Rubin quantified(量化)a past extinction of sharks, reporting a 90% decline in number and >70% drop in diversity. They found that nearer-shore sharks appear to survive, but migratory ones go extinct. The finding of this study is that sharks had undergone a widespread extinction that reorganized their communities from 16 million to 20 million years ago.
Sibert and Rubin narrowed the disappearance of sharks to a window of time under 100,000 years around 19 million years ago, but the causes of this event remain unclear. Because this time period does not stand out as a period of major climatic change, the authors do not attribute(归因于) environmental factors as an extinction driver. As for other causes, the loss of shark diversity is directly linked to overfishing.
The loss of sharks from the oceans has profound, complex, and unavoidable ecological consequences because their presence reflects the stability of marine ecosystems. Yet, one-quarter of the global diversity of sharks is currently threatened with extinction. Despite recent improvements in conservation actions, shark communities never recovered from a mysterious extinction event 19 million years ago; the ecological fate of what remains is now in our hands.
1. What did Sibert and Rubin find?| A．The negative impact of the extinction of sharks. |
| B．The mysterious reasons behind the disappearance of sharks. |
| C．The most recent advances in the study of the largest ecosystem. |
| D．The large-scale decline in the number of sharks about 19 million years ago. |
| A．By collecting and analyzing shark fossils worldwide. |
| B．By quantifying the movement of near-shore sharks. |
| C．By using a system to study the naturally fallen bits from sharks. |
| D．By keeping track of ancient oceanic sharks and their activities. |
| A．Overfishing is partly to blame for the loss of shark diversity. |
| B．The number of sharks has recovered to its previous level. |
| C．Scientist have figured out the exact causes of sharks’ extinction. |
| D．Sharks had undergone a widespread extinction due to the climate change. |
| A．Sharks: The Stories behind Them | B．Sharks: The Marine Masters |
| C．Sharks: Killers or Misunderstood? | D．Sharks: The Mysterious Extinction |
【推荐3】Volunteering is a great way to help your community. It is something that people should be doing more often, because it is a great way to help out those less fortunate. Another reason that you should volunteer is that it has a lot of health benefits, which people don’t seem to really know about.
Reduce depression (抑郁)
Volunteering is a great way to decrease depression, especially if you are someone who doesn’t have a great support system at home.
A lot of volunteering involves packing boxes or moving things, and that is very good for your heart. You can actually walk the dogs and clean cages at a local animal shelter, which are all ways to stay active. If you are volunteering to do something you love, you may not even notice that it takes a great deal of physical energy, so it’s much better than just working out because you enjoy it.
Make you feel satisfied (满意的)
When you do voluntary work, you feel this satisfaction out of what you are doing, because you know you are helping other people. When you feel this satisfaction, your mental and physical health improves, and you just feel better overall (全面的).
Reduce anxiety
| A．Help you stay active |
| B．The results are as follows |
| C．Build up your mental strength |
| D．Here are four health benefits you can get through volunteering |
| E．If you always feel embarrassed at new social occasions, then volunteer |
| F．A lot of people become depressed because they don’t have friends or families |
| G．In order to stay healthy, you have to keep a balance between your mind and body |
