Around the world coral reefs(珊瑚礁) are facing threats(威胁) brought by climate change and great changes in sea temperatures. While ocean warming has been the primary focus for scientists and ocean policy managers, cold events can also whiten corals. A new study by scientists compared damaged to corals exposed to heat as well as cold stress. The results show that cool temperatures can cause more damage in the short term, but heat is more destructive(破坏性的) in the long run.
Climate change is widely known to produce warming conditions in the oceans, but extreme cold-water events have become more frequent and serious as well. In 2010, for example, coral reefs around the world faced on of the coldest winters and one of the hottest summers on record.
During a unique experiment, corals under cold temperatures suffered greater damage in just days compared with heat treated corals. Yet the researchers found that corals were eventually able to adjust to the cold conditions, make their health stable and continue to grow. However, over the long term corals subjected to heat suffered more greatly than those in cold, with evidence of severe whitening and growth stoppage, which leads to death.
The coral’s ability to adjust to cool temperatures surprised the researchers, who say the study’s results show the complexities(复杂性) of monitoring coral health in response to different environmental factors(因素).
“Global warming is associated with increases but also decreases of temperatures,” said Deheyn, one of the researchers. “Not much has been known about the comparative effects of temperature decrease on corals. These results are important because they show that corals react differently to temperature differences, which is important for future management of coral reefs in the field of climate change.”Which of the following is TRUE according to the passage?
| A．Corals are unable to adjust to temperature changes. |
| B．Cold temperature causes greater damage to corals. |
| C．Hot temperature helps coral reefs to grow quickly. |
| D．Heat and cold damage corals in their own ways. |
We can learn from the passage that .
| A．scientists used to pay no attention to the effect of cold events on corals |
| B．2010 witnessed one of the greatest temperature differences on record |
| C．corals prefer warmer conditions to cold temperatures in the long run |
| D．global warming has nothing to do with the decrease of temperature |
According to the research, .
| A．corals may continue to grow in cold events after a few days |
| B．cold events help corals grow more quickly in a short time |
| C．corals show no response to hot temperatures in the first days |
| D．corals are whitened mainly because of warm temperatures |
Scientists reached the conclusion through .
| A．news report | B．scientific study | C．great imagination | D．natural conditions |
David Beckham had a dream: to be the first English player to appear in four World Cups．But now it appears that dream is over after a serious injury to his Achilles tendon （跟腱） which means he could be out of action for around six months．With this year's World Cup in South Africa only three months away, sadly Beckham looks set to miss out．The injury happened while Beckham was playing for AC Milan against AC Chievo in the Italian league．After attempting to kick the ball he fell to the ground and hobbled off the pitch before being stretchered （被担架抬走）away．
It is not yet known whether he has completely severed （切断）his Achilles tendon or only torn it．The player has now flown to Finland for assessment and treatment by a knee specialist．
England manager Fabio Capello fears the worst for Beckham's World Cup chances．
"We have to wait for the results of the scan but it looks like he is out of the World Cup," he said in a statement．"I spoke with him after the game on Sunday night to offer my support．
"David is a great professional and has worked very hard to be ready for the World Cup, so missing it will be a big blow．"
Beckham's former manager at American club LA Galaxy, Alexei Lalas, echoed （共鸣）Capello's words of support:
"It is a horrible situation for Beckham．I know how much it meant to him to be in the World Cup and how important he was to the England team．
David Beckham is now 34 and some are asking whether this serious injury could mean his whole career is over．
Whatever happens, as one of football's best-known and popular players, Beckham will have no shortage of encouragement from fans around the world．
Some will remember Beckham's miraculous recovery from an Achilles injury in 2006, when he was back on the pitch after only eight weeks．
If he could repeat the same feat in time for the World Cup it really would be the stuff of fairytales．
So, perhaps all is not lost．Optimists will take heart from Alexei Lalas' words:
"You never want to write off David Beckham as he has shown us his ability to bounce back（恢复原状）．" ．What is the best title of the passage?
| A．Beckham had a dream? |
| B．Beckham--- a great football player! |
| C．The end for Beckham? |
| D．World Cup in South Africa! |
．What does the author mean by saying “missing it will be a big blow” in paragraph 4 ?
| A．Missing the world cup will be a big success． |
| B．Missing Beckham means a great failure ． |
| C．Missing Beckham means an important opportunity for the American club LA Galaxy． |
| D．Missing the world cup means a big disappointment for Beckham ． |
．We may infer from the passage that ________ ．
| A．Beckham will definitely not be able to play football again |
| B．Beckham was cured by a great knee specialist he found |
| C．Beckham has his ability to bounce back |
| D．Beckham is likely to miss the world Cup |
．What does the underlined words “take heart” probably mean ?
| A．get disappointed | B．get help | C．get encouraged | D．get hurt |
An early invention by Albert Einstein has been rebuilt by scientists at Oxford University. They are trying to develop an environmentally friendly refrigerator that runs without electricity.
We all know that modern fridges cause damage to the environment. They work by using a kind of man-made greenhouse gas called Freon (氟里昂), which is far more damaging than carbon dioxide.
Now Malcolm McCulloch, an electrical engineer at Oxford, is leading a three-year project to develop appliances that can be used in places without electricity.
His team has completed a prototype (样机) of a fridge patented in 1930 by Einstein. It used only pressurized gases to keep things cold. The design was partly used in the first refrigerators, but the technology was dropped when more efficient compressors (压缩机) became popular in the 1950s. That meant a switch to using Freon.
Einstein's idea uses butane (丁烷) and water and takes advantage of the fact that liquids boil at lower temperatures, when the air pressure around them is lower.
"If you go to the top of Mount Qomolangma, water boils at a much lower temperature than it does when you're at sea level and that's because the pressure is much lower up there," said McCulloch.At one side is the evaporator (蒸发器), a bottle that contains liquid butane. "If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so," says McCulloch. "That's what makes it cold."
The gas fridges based on Einstein's design were replaced by Freon-compressor fridges partly because Einstein's design was not very efficient. But McCulloch thinks that by changing the design and replacing the types of gases used it will be possible to quadruple (翻两番) the efficiency.
However, McCulloch's fridge is still in its early stages. "It's very much a prototype," he said. "Give us another month and we'll have it working."． According to the passage, an early invention by Albert Einstein _______.
| A．has been rediscovered because it costs much less and works more efficiently |
| B．is being redesigned because it could be used in places without electricity |
| C．has just been found to be energy-saving and environmentally friendly |
| D．will be fully made use of and become the fridge of the future |
．Which of the following is TRUE according to the text?
| A．Freon was used in fridges long before the 1950s. |
| B．Freon is what makes current fridges big polluters. |
| C．McCulloch thinks he could improve Einstein's design by using other types of vapors. |
| D．The fridge Malcolm McCulloch and his team designed will be put into production soon. |
．We can learn from the text that the prototype completed _______.
| A．changed the air pressure around it |
| B．was tested on the top of Mount Everest |
| C．increased the liquid boiling temperature |
| D．used only pressurized gases to keep things cold |
．McCulloch's words in Paragraph 6 _____.
| A．serve as an explanation for the principle behind Einstein's fridge |
| B．give you the reason why Einstein's fridge was not efficient |
| C．tell you how to take advantage of low air pressure |
| D．show you how Einstein's fridge works |
A latest national survey has found that over half of China's netizens are suffering from various mental problems although some 62 percent of them claim at the same time that they are happy on the whole anyway.
This is the result of China's first White Paper on Netizens' Health Conditions issued on Wednesday by 39.net, China's largest authoritative website on health sciences. It is the first most comprehensive health survey on netizens' health situation ever conducted in China in ten years' time. The white paper came out after two months of online and offline research that involved over 150 thousand netizens, covering topics and questions on health knowledge, mental situation, sense of health, and living habits.
According to the white paper, more than 70 percent of China's netizens say they are suffering from mental problems such as bad memory, anxiety, depression, and a lack of confidence. And a similar 72 percent of them also say they are often suffering from diseases like insomnia, dizziness, joint degeneration and achings. Meanwhile, another 53 percent of netizens believe that white collar employees who have bigger work pressures are more likely to catch mental problems.
The white paper adds, doing almost no sports and spending long time surfing online lead to the above mentioned health problems among netizens. Only 9 percent of netizens take up sports on weekends while over 40 percent stay home, surfing. And only 16 percent netizens can assure more than eight hours' sleeping daily.
At present, China has a netizen population of 162 million, with a monthly consumption of 186 yuan, or about 25 dollars, on Internet surfing. The national survey on netizens' health situation ________.
| A．was conducted by sohu.com | B．is conducted every year |
| C．was carried out online and offline | D．covered about half a million netizens |
. Which of the following has the closest meaning to the underlined part "white collar"?
| A．White clothes. | B．White offices. | C．Office workers. | D．White people. |
. All the following factors have been mentioned to cause the health problems among netizens EXCEPT ________.
| A．doing no sports | B．spending long time online |
| C．heavy work pressures | D．shopping online |
.What’s the main idea of the passage?
| A．China has a large netizen population. |
| B．Many netizens in China have mental problems. |
| C．The Internet has a negative influence on people. |
| D．How to surf the Internet safely and healthily. |
People diet to look more attractive. Fish diet to avoid being beaten up, thrown out of their social group, and getting eaten as a result. That is the fascinating conclusion of the latest research into fish behavior by a team of Australian scientists.
The research team has discovered that subordinate (隶属的)fish voluntarily diet to avoid challenging their larger competitors. “In studying gobies we noticed that only the largest two individuals, a male and female, had breeding(繁殖) rights within the group, ”explains Marian Wong. “All other group members are non-breeding females, each being 5–10% smaller than its next largest competitor. We wanted to find out how they keep this size separation.”
The reason for the size difference was easy to see. Once a subordinate fish grows to within 5–10% of the size of its larger competitor，it causes a fight which usually ends in the smaller goby being driven away from the group. More often than not, the evicted fish is then eaten up.
It appeared that the smaller fish were keeping themselves small in order to avoid challenging the boss fish. Whether they did so voluntarily，by limiting how much they ate, was not clear. The research team decided to do an experiment. They tried to fatten up some of the subordinate gobies to see what happened. To their surprise，the gobies simply refused the extra food they were offered，clearly preferring to remain small and avoid fights, over having a feast.
The discovery challenges the traditional scientific view of how boss individuals keep their position in a group. Previously it was thought that large individuals simply used their weight and size to threaten their subordinates and take more of the food for themselves, so keeping their competitors small.
While the habits of gobies may seem a little mysterious, Dr. Wong explains that understanding the relationships between boss and subordinate animals is important to understanding how hierarchical (等级的) societies remain stable.
The research has proved the fact that voluntary dieting is a habit far from exclusive(排他的) to humans. “As yet, we lack a complete understanding of how widespread the voluntary reduction of food intake is in nature,” the researchers comment. “Data on human dieting suggests that, while humans generally diet to improve health or increase attractiveness, rarely does it improve long term health and males regularly prefer females that are fatter than the females’ own ideal.”
When a goby grows to within 5–10% of the size of its larger competitor, it_______.
| A．faces danger | B．has breeding rights |
| C．eats its competitor | D．leaves the group itself |
The underlined words “the evicted fish” in Paragraph 3 refer to _______.
| A．the fish beaten up | B．the fish found out |
| C．the fish fattened up | D．the fish driven away |
The experiment showed that the smaller fish_______.
| A．fought over a feast | B．went on diet willingly |
| C．preferred some extra food | D．challenged the boss fish |
What is the text mainly about?
| A．Fish dieting and human dieting. | B．Dieting and health. |
| C．Human dieting. | D．Fish dieting. |
14 days from just ￡ 2,090 pp
Fully inclusive from the UK
Price covers: International airfares, departure taxes, fuel charges, local transportation, accommodation, all meals, entrance fees, guides, daily tours and visas for UK citizens.
◆Days 1-3: UK---Shanghai
Fly to the great city of Shanghai and in the evening sample traditional Shanghai food. Visit the beautiful Yu Gardens, Old Town, Shanghai Museum, cross the Great Nanpu Bridge and tour the Pudong area. Also explore Xintiandi with its 1920’ s style Shikumen buildings and end your stay in Shanghai with an amazing Huangpu River evening tour.
◆Days 4-7: Shanghai---Yangtze River Tour
Fly to Yichang and change (approx: one hour)to board your Yangtze River ship for the next four nights. Enjoy a tour of the Three Gorges Dam (三峡大坝)before sailing on the grand Yangtze River, passing through the impressive Three Gorges. We take a side trip to the Lesser Three Gorges or travel up the Shennong Stream in a peapod boat and enjoy various shore trips along the way.
◆Day 8: Chongqing---Chengdu
Get off in Chongqing and drive to Chengdu for an overnight stay.
◆Days 9-10: Chengdu---Xi’an
Visit the famous Panda Reserve to see the lovely animals. We then fly to the historic city of Xi’an for two nights’ stay and enjoy traditional Shui Jiao. Next day, explore one of the most important discoveries of the 20th Century — the Terracotta Warriors(兵马俑) ，followed by the ancient City Wall and a performance of Tang Dynasty dancing.
◆Days 11-13: Xi’an---Beijing
Visit Little Wild Goose Pagoda and see the ancient objects at the wellknown Shaanxi Provincial Museum before walking through the lively Muslim Quarter to see the Great Mosque. Later fly to Beijing for three nights’ stay and try Peking Duck. During our stay in Beijing, we stroll through Tiananmen Square to the Forbidden City, the largest and best preserved collection of ancient buildings in China, and visit the Summer Palace. Next day we take a walk on the Great Wall, tour the unique Temple of Heaven and enjoy an attractive Chinese Acrobatic Show.
◆Day 14: Beijing---UK
Fly back to the UK, arriving home later the same day filled with happy memories.
The underlined word “sample” in the passage probably means “________”.
| A．buy | B．reserve | C．taste | D．make |
The first and last scenic spots to be visited in Xi’an are________.
| A．the Terracotta Warriors and the Great Mosque |
| B．the Terracotta Warriors and Shaanxi Provincial Museum |
| C．Little Wild Goose Pagoda and the Great Mosque |
| D．Little Wild Goose Pagoda and the Muslim Quarter |
Which of the following is TRUE according to the ad?
| A．The tourists will have to pay extra for fuel and meals. |
| B．The tourists will visit the 1920’s Shikumen buildings in Beijing. |
| C．The tourists will take a side trip to the Three Gorges Dam during the tour. |
| D．The tourists will stay in Beijing for three nights before leaving for the UK. |
The ad is mainly intended to________.
| A．encourage the British to travel in China |
| B．attract the British to traditional Chinese food |
| C．offer services of booking air tickets to tourists |
| D．provide the British with a better understanding of China |