cet6阅读理解练习题

　　阅读题在英语六级考试中占了很大的比重，大家平时要多做阅读题练习，下面是小编提供给大家关于cet6阅读理解练习题，供大家备考。

cet6阅读理解练习题

　　Passage 1

　　We sometimes think humans are uniquely vulnerable to anxiety, but stress seems to affect the immune defenses of lower animals too. In one experiment, for example, behavioral immunologist (免疫学家) Mark Laudenslager, at the University of Denver, gave mild electric shocks to 24 rats. Half the animals could switch off the current by turning a wheel in their enclosure, while the other half could mot. The rats in the two groups were paired so that each time one rat turned the wheel it protected both itself and its helpless partner from the shock. Laudenslager found that the immune response was depressed below normal in the helpless rats but not in those that could turn off the electricity. What he has demonstrated, he believes, is that lack of control over an event, not the experience itself, is what weakens the immune system.

　　Other researchers agree. Jay Weiss, a psychologist at Duke University School of Medicine, has shown that animals who are allowed to control unpleasant stimuli don’t develop sleep disturbances or changes in brain chemistry typical of stressed rats. But if the animals are confronted with situations they have no control over, they later behave passively when faced with experiences they can control. Such findings reinforce psychologists’ suspicions that the experience or perception of helplessness is one of the most harmful factors in depression.

　　One of the most startling examples of how the mind can alter the immune response was discovered by chance. In 1975 psychologist Robert Ader at the University of Rochester School of Medicine conditioned (使形成条件反射) mice to avoid saccharin (糖精) by simultaneously feeding them the sweetener and injecting them with a drug that while suppressing their immune systems caused stomach upsets. Associating the saccharin with the stomach pains, the mice quickly learned to avoid the sweetener. In order to extinguish this dislike for the sweetener, Ader reexposed the animals to saccharin, this time without the drug, and was astonished to find that those mice that had received the highest amounts of sweetener during their earlier conditioning died. He could only speculate that he had so successfully conditioned the rats that saccharin alone now served to weaken their immune systems enough to kill them.

　　11. Laudenslager’s experiment showed that the immune system of those rats who could turn off the electricity ________.

　　A) was strengthened

　　B) was not affected

　　C) was altered

　　D) was weakened

　　12. According to the passage, the experience of helplessness causes rats to ________.

　　A) try to control unpleasant stimuli

　　B) turn off the electricity

　　C) behave passively in controllable situations

　　D) become abnormally suspicious

　　13. The reason why the mice in Ader’s experiment avoided saccharin was that ________.

　　A) they disliked its taste

　　B) it affected their immune systems

　　C) it led to stomach pains

　　D) they associated it with stomachaches

　　14. The passage tells us that the most probable reason for the death of the mice in Ader’s experiment was that ________.

　　A) they had been weakened psychologically by the saccharin

　　B) the sweetener was poisonous to them

　　C) their immune systems had been altered by the mind

　　D) they had taken too much sweetener during earlier conditioning

　　15. It can be concluded from the passage that the immune systems of animals ________.

　　A) can be weakened by conditioning

　　B) can be suppressed by drug injections

　　C) can be affected by frequent doses of saccharin

　　D) can be altered by electric shocks

　　参考答案：BCDCA

　　Passage 2

　　Read the following passage and answer the questions below.

　　In recent years, the concept of "green living" has gained significant momentum worldwide. With the increasing awareness of environmental issues, people are increasingly adopting lifestyles that are more sustainable and eco-friendly. Green living involves making conscious choices in daily life to reduce ones environmental footprint. This can include reducing energy consumption, using renewable resources, minimizing waste, and supporting eco-friendly products and services.

　　One of the key areas where green living can be practiced is in the home. Simple changes such as using energy-efficient light bulbs, recycling, and composting food waste can have a significant impact. Additionally, many people are now opting for eco-friendly home appliances that consume less energy and produce fewer emissions. The rise of green building practices has also contributed to the creation of more sustainable homes.

　　On a larger scale, communities and cities are also embracing green living. Governments are encouraging the use of public transportation, promoting cycling and walking, and investing in renewable energy projects. Urban green spaces, such as parks and community gardens, are being developed to improve air quality and provide recreational opportunities for residents.

　　However, despite these positive developments, challenges remain. The transition to green living requires significant changes in behavior and infrastructure. Moreover, the cost of eco-friendly products and services can be higher, making it difficult for some people to adopt green living practices.

　　Questions:

　　1、What is the main idea of the passage?

　　A. The history of green living.

　　B. The benefits of adopting a green lifestyle.

　　C. The challenges of living sustainably.

　　D. The increasing popularity of green living.

　　2、Which of the following is NOT a way to practice green living at home?

　　A. Using energy-efficient light bulbs.

　　B. Throwing away food waste without composting.

　　C. Opting for eco-friendly home appliances.

　　D. Recycling.

　　3、What role do governments play in promoting green living on a larger scale?