2013年5月北京成人学士学位英语考试真题及答案

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北京地区成人本科学士学位英语统一考试

2013.05

Part I Reading Comprehension Directions: There are three passages in this

part.Each passage is followed by some questions or unfinished statements.For

each of them there are four choices marked A, B, C and D. You should decide on

the best choice and blacken the corresponding letter on the Answer sheet.

Is that 6 a. m. workout getting in the way of good sleep? Don' t think

your fat cells won' t notice. A new study published in The Annals of Internal

Medicine ( a medical journal) finds that in-adequate shut-eye has a harmful

effect on fat cells, reducing their ability to respond to insulin(胰岛素) by

about 30 percent. Over the long-term, this decreased response could set the

stage for type-2diabetes (a medical condition in which someone has too much

sugar in his or her blood), fatty liver disease and weight gain.

The study adds to a growing body of evidence that there' s "an intimate

relationship between the amount of sleep we get and our ability to maintain a

good, healthy body weight," says sleep expert Helene Emsellem, director of the

Center for Sleep and Wake Disorders in Chevy Chase,Maryland. (76)But Americans

don't seem to be getting the message that we need seven to nine hours per

night. More then 1 in 5 of us, according to a report from the Centers for

Disease Control and Prevention, is getting six or fewer hours of sleep per

night, on average.

So how did researchers study fat cells in the Annals paper? Matthew Brady

of the University of Chicago and a group of colleagues selected and persuaded

seven volunteers to take part in the research project. They were all young,

thin and healthy and agreed to sleep for eight nights in a sleep lab. "For four

nights they were allowed to stay in bed for 8.5 hours a night," says Brady.

Then, a month later,they came back for four additional nights--but this time

they were allowed just 4.5 hours of sleep per night. And after each visit,

researchers got a sample of their fat. (77)Brady explains that the fat cells

responded significantly to the loss of sleep. "I was very surprised to be

honest," he says.

Bad things can happen when fat cells become less responsive to insulin.

"Fat cells are actually your friend," h.e says. "They're there to store

lipids(血脂). " When lipids stay inside the cells,your body can utilize the fat

when you' re exercising or sleeping or going about your day. " However, when

fat cells start to become insulin resistant, the lipids start to leach out of

the fat cells and rise in the bloodstream," Brady says.

第 1 题单选 According to the passage, lack of sleep for a long while can

probably lead to all of the following EXCEPT________

A.heart disease B.weight gain C.Diabetes D.liver disease

答案：A

第 2 题 The main idea of the third paragraph is________

A.how to write a medical research paper B.how to avoid sleep loss

C.how the research was conducted D.how to conduct a medical experiment

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北京地区成人本科学士学位英语统一考试2013.05PartIReadingComprehensionDirections:Therearethreepassagesinthispart.Eachpassageisfo

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