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2008年12月20日大学英语六级(CET-6)真题试卷(A卷)

Part I Writing (30 minutes)

Directions: For this part, you are allowed 30 minutes to write a short essay entitled How to improve psychological health? You should write at least 150 words following the outline given below.

1. 学生心理健康的重要性

2. 学校应该怎样做

3. 学生自己应该怎样做

How to improve psychological health

Part II Reading Comprehension (Skimming and Scanning) (15 minutes)

Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A), B), C) and D). For questions 8-10, complete the sentences with the information given in the passage.

Supersize SurpriseAsk anyone why there is an obesity epidemic and they will tell you that it's all down to eating too much and burning too few calories. That explanation appeals to common sense and has dominated efforts to get to the root of the obesity epidemic and reverse it. Yet obesity researchers are increasingly dissatisfied with it. Many now believe that something else must have changed in our environment to precipitate (促成) such dramatic rises in obesity over the past 40 years or so. Nobody is that the ―big two‖ – reduced physical activity and increased Earlier a 1. Not enough sleep

It is widely believed that sleep is for the brain, not the body. Could a shortage of shut-eye also be helping to make us fat?

Several large-scale studies suggest there may be a link. People who sleep less than 7 hours a night tend to have a higher body mass index than people who sleep more, according to data gathered by the US National Health and Nutrition Examination Survey. Similarly, the US Nurses' Health Study, which tracked 68,000 women for 16 years, found that those who slept an average of 5 hours a night gained more weight during the study period than women who slept 6 hours, who in turn gained more than those who slept 7.

It's well known that obesity impairs sleep, so perhaps people get fat first and sleep less afterwards. But the nurses' study suggests that it can work in the other direction too: sleep loss may precipitate weight gain.

Although getting figures is difficult, it appears that we really are sleeping less. In 1960 people in the US slept an average of 8.5 hours per night. A 2002 poll by the National Sleep Foundation suggests that the average has fallen to under 7 hours, and the decline is mirrored by the increase in obesity.

2. Climate control

We humans, like all warm-blooded animals, can keep our core body temperatures pretty much constant regardless of what's going on in the world around us. We do this by altering our metabolic (新陈代新的) rate, shivering or sweating. Keeping warm and staying cool take energy

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