Most people regard zoos as safe places for animals, where struggles such as difficulty finding food and avoiding predators（捕食性动物） don't exist. Without such problems, animals in zoos should live to a ripe old age. But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often develop diseases, joint problems and behavior changes. Sometimes, they even become unable to have babies.
To learn more about how captivity(监禁) affects elephants, a team of international scientists led by Mason, a biologist, compared the life spans of female elephants born in zoos with female elephants living outdoors in the wild. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 elephants in zoos.
The team found that female elephants born in zoos lived an average of 16.9 years. Their wild counterparts（同类事物） who died of natural causes lived an average of 56 years——more than three times as long.
Scientists don't yet know for sure why wild elephants seem to live so much better than their zoo-raised counterparts. Mason thinks stress and obesity(肥胖) may be to blame. Zoo elephants don't get the same kind of exercise as they do in the wild, and most are very fat. Elephant social lives are also much different in zoos than in the wild, where they live in large groups.
Another finding from the study showed that elephants born in zoos were more likely to die earlier than elephants captured in the wild and brought to zoos. Mason suggests stress in the mothers in zoos might cause them to have babies that are less likely to survive.
The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce successfully and keep healthy populations, that doesn't appear to be the case with elephants.
【小题1】The text tells us that zoo elephants are different from other zoo animals because they________

第二部分：阅读理解（共两节，满分40分）
第一节（共15题；每小题2分，满分30分）
阅读下列短文，从每题短文后所给各题的四个选项（A、B、C、D）中，选出最佳选项。
A
Chen Yurong, 55, an average woman in Wuhan, Hubei province, who was diagnosed with a fatty liver (肝), walked 10 kilometers a day for seven months, despite wind an rain, so she could donate part of a healthy liver to her son. After wearing out four pairs of shoes and losing eight kilograms, her fatty liver condition disappeared. One doctor called it a “miracle” (奇迹).

Your genetic makeup plays a big part in determining your size and weight. If both your parents are tall, there is a good chance you’ll be tall. But if your parents are smaller than average, you may want to rethink that professional basketball career!
The same goes for your body type. Have you ever heard someone say a person is “big boned?” It’s a way of saying the person has a large frame, or skeleton(骨骼). Big bones usually weigh more than small bones. That’s why it’s possible for two kids with the same height, but different weight, to both the right weight.
Being overweight can run in someone’s family, but it may not be because of their genes. Poor eating and exercise habits also run in families and these may be the reasons the members of a family are overweight. And even though some kids gain weight more easily than others, when they eat right and exercise, most kids can have a healthy weight that’s right for them. It’s true- the way you live can change the way you look.
How much your weight is a balance between the calories you eat and the calories you use. If you eat more calories than your body needs to use, you will gain too much weight. If you spend you free time watching TV, your body won’t use as many calories as it would if you played basketball, skated, or went for a walk. But if you eat more and exercise less, you may become overweight. On the other hand, if you eat less and exercise more, you may lose weight.
【小题1】 Which one can be used as the best title of this passage?

High Speed Book Scanner
Simply turning pages of a book quickly may not seem like the best way to scan it. A Japanese research group at Tokyo University has created new software that allows hundreds of pages to be scanned within minutes. Scanning text is normally a boring process with each page having to be inserted into a scanner, but the team led by Professor Masatoshi Ishikawa uses a high speed camera that takes 500 pictures a second to scan pages as they are turned by workers.
Normal scanners can only scan the information that is actually before them on the page. This high speed book scanner uses a camera that captures pages at 1000fps as they are turned. A system built in allows it to automatically correct any changes to the text due to the page bending as well as light differences due to shadows. “It takes a shot of the shape, then it calculates the shape and uses those calculations to film the scanning,” Ishikawa said, explaining the system used to reconstruct the original page.
The current system is able to scan an average 250-page book in a little over 60 seconds using basic computer hardware. While it now requires extra time to process the scanned images (影像), the researchers hope to eventually make the technology both faster and much smaller. “In the more distant future, once it becomes possible to put all of this processing on one chip (芯片) and then put that in an iPad or iPod, one could scan just using that chip. At that point, it becomes possible to scan something quickly to save for later reading,” Ishikawa said.
Being able to scan books with an iPhone may be further off, but Ishikawa says that a commercial version of the large-scale computer based scanning system could be available in two or three years. While the technology has the potential to take paper books into the digital age, it remains to be how publishers will react to people scanning their books while just turning pages quickly.
【小题1】According to the passage, the advantage of the new scanning software is that ______.

Limit the use of private cars, improve public transport and encourage the use of bicycles to control traffic congestion(拥挤) during the 2008 Olympics, experts from foreign countries advised Beijing on Friday.
Professor Nigel Wilson, of the civil and environmental engineering department of Massachusetts Institute of Technology, said he was "supportive to the limiting of private cars during the Olympic Games", saying that in foreign countries, the method is also adopted during big events, but he was unsure about the approach.
The government planned to keep an average of more than one million cars off the roads to improve traffic flow during the Olympics, said Liu Xiaoming, deputy director of the Beijing Traffic Committee, at the China Planning Network First Urban Transportation Congress.
Sharing Wilson's view, Dr. Yoshitsugu Hayashi, dean of the Graduate School of Environmental Studies of Nagoya University, believed the reduction in car use should be achieved not by banning, but through incentives.
"Drivers who don't use their private cars could be given points," he said, "and the points could be exchanged for goods from online shopping."
Wetzel stressed limiting the use of company cars. "Governmental officials should also be encouraged to use public transportation or ride bicycles," he said, adding that he himself is a bicycle-rider in London.
Matthew Martimo, director of Traffic Engineering with Citilabs, said the bicycle was China's advantage. "Limiting private cars is an idea worth trying but it is just a temporary solution," he said. "The real cause of congestion is high density of people in Beijing and many have cars."
Beijing, with a population of 15 million, is home to more than three million automobiles, and the number is rising by 1,000 a day.
Professor Wilson said the Olympic Games was a great opportunity for Beijing to think about traffic problems and develop transportation, adding that the city had already been making public transport more efficient. Beijing has promised to stretch its 114-kilometer city railway to 200 kilometers before the opening of the Olympic Games.
“We are looking forward to borrowing Beijing's experiences and drawing from its lessons in preparation for the 2012 Olympics,” said Wetzel. 
51. The underlined word incentives in paragraph 4 means_______.
A. something that encourages people to try           B. online shopping
C. points could be exchanged for goods                D. award
52.It can be seen from the passage that ______.
A. the government planned to forbid over 1 million cars to run on the roads during the Olympics.
B. banning private cars is the best way to solve traffic congestion in Beijing
C. Beijing now has 200 kilometers of city railway
D. the use of company cars will not be limited
53. Why did Wetzel stress “ he himself is a bicycle-rider in London”?
A. To limit the use of company cars.
B. To encourage governmental officials to use public transportation or ride bicycles.
C. To show that riding bicycles is good for health.
D. To show that he loves riding bicycles.
54. Which of the following may be the reason for the traffic congestion in Beijing?
A. The 2008 Beijing Olympic games.
B. The number of cars in Beijing is rising by 1,000 a day.
C. The large population in Beijing and the large number of cars.
D. Public transport in Beijing is not efficient.
55. The purpose of the passage is ________.
A. to limit the use of private cars, improve public transport
B. to encourage the use of bicycles to control traffic congestion during the 2008 Olympics
C. to borrow Beijing's experiences and draw from its lessons in preparation for the 2012 Olympics
D. to tell the advice given by foreign experts on traffic congestion during 2008 Beijing Olympics