学士学位英语2013年5月学位英语真题.pdf

北京地区成人本科学士学位英语统一考试 2013.05.11 PartIReadingcomprehension(30%) Directions: There are threepassages in thispart. Eachpassage isfollowed by some questions or finished statements. For each of them there arefour choices marked A, B, C and D. You should decideon thebestchoiceandblacken thecorresponding letter on theAnswerSheet. Passage 1 Questions 1to 5arebasedon the followingpassage: 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 medicaljournal) finds that inadequate shut-eye has a harmful effect on fat cells, reducing their ability to respond to insulin (胰岛素) by about 30percent. Over the long-term,this decreased response could set the stage for type-2 diabetes (a medical condition in which someone has too much sugar in his or her blood), fatty liver diseaseandweight gain. The study addsto a growingbody of evidencethat there’“an intimaterelationship between the amount of sleep we get andour ability tomaintain a good,healthy bodyweight,” says sleep expert HeleneEmsellem,director ofthe Center for Sleep andWakeDisordersin Chevy Chase,Maryland. (76) But Americans don’t seem to be getting the message that we need seven to nine hours par night. More than 1 in 5 of us, according to a report from the Centers for Disease Control and Prevention,isgetting six or fewerhoursof sleeppernight,on average. So how did researchers study fat cells in theAnnals 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,amonth later,they cameback for four additionalnights——but thistimethey were all