北京地区成人学士学位英语统一考试真题及答案.docx

1、北京地区成人本科学士学位英语统一考试2011.05Part 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

2、 letter on the Answer sheet.Spending 50 minutes with a cell phone close to your ear is enough to change brain cell activity in the part of the brain closest to the antenna (天线).But whether that causes any harm is not clear, scientists at the National Institute of Health said at a conference last mon

3、th, adding that the study will not likely settle concerns of a link between cell phones and brain cancer.What we showed is glucose(葡萄糖) metabolism(代谢) (a sign of brain activity) increases in the brain in people who were exposed to a cell phone in the area closest to the antenna, said Dr.Nora Volkow

4、of the NIH, whose study was published in the Journal of the American Medical Association.(76) The study was meant to examine how the brain reacts to electromagnetic fields causedby wireless phone signals.Volkow said she was surprised that the weak electromagnetic radiation(电磁辐射) from cellphones coul

5、d affect brain activity, but she said the findings do not shed any light on whether cellphones cause cancer.This study does not in any way indicate that.What the study does is to show the human brain is sensitive to electromagnetic radiation from cell phone exposures. Use of the devices has increase

6、d dramatically since they were introduced in the early 1980s, with about 5 billion cell phones now in use worldwide.Some studies have linked cell phone exposure to an increased risk of brain cancers, but a large study by the World Health Organization did not offer a clear answer to this.Volkow s tea

7、m studied 47 people who had their brain examined while a cell phone was turned on for 50 minutes and another while the phone was turned off.While there was no complete change in brain metabolism,they found a 7 percent increase in brain metabolism in the region closest to the cell phone antennawhen t

8、he phone was on.(77) Experts said the results were interesting, but urged that they be understood with great care. Although the biological significance, if any, of increased glucose metabolism from too much cell phone exposure is unknown, the results require further investigation, Henry Lai of theUn

9、iversity of Washington in the U.S.and Dr.Lennart Hardell of University Hospital in Sweden,wrote in an article in JAMA.Much has to be done to further investigate and understand these effects. They wrote.第1题 According to the passage, which of the following is TRUE?A.Cell phone use is dangerous.B.Cell

10、phone use causes cancer.C.The human brain is an electromagnetic field.D.There are about 5 billion cell phone users in the world right now.答案：D第2题 Doctor Volkow was astonished because_.A.her research has shed light on her understanding of cell phoneB.she found that cell phone exposure is harmful to h

11、uman brainC.she found that using a cell phone for about 50 minutes could influence or change brain activityD.human brain is not responsive to electromagnetic radiation答案：C第3题 According to the passage, cell phones were launched_.A.in the late 1970s B.between 1980 and 1985C.in the late 1980s D.in the

12、early 1990s答案：B第4题 What does the word that stand for in the second paragraph?A.Brain activity. B.Her research findings.C.The fact that cell phone use may cause cancer. D.Her research progress.答案：C第5题 Which of the following is an appropriate title for this passage?A.Cell Phone Radiation: Is It Harmfu

13、l?B.Cell Phone Radiation: Is It Useful?C.Cell Phone Radiation: Is It Healthy?D.Cell Phone Radiation: Is It Weak?答案：AHuman beings have always had an ability to attend to several things at once.(78) Nor is electronic multitasking entirely new: We ve been driving while listening to car radios since the

14、y be came popular in the 1930s.But there is no doubt that multitasking has reached a kind of warp speed in the era of Web-enabled computers, when it has become routine to conduct several IM (即时通讯) conversations, watch TV and use the computer all at once.But what s the impact of this media consumptio

15、n? And how are these multitasking devices changing how kids learn, reason and communicate with one another? Social scientists and educators are just beginning to deal with these questions, but the researchers already have some strong opinions.(79) Although multitasking kids may be better prepared in

16、 some ways for today s fast-paced work places, many scientists are positively alarmed by the trend.Kids that are instant messaging while doing homework, playing games online and watching TV, aren t going to do well in the long run.On the positive side, multitasking students tend to be extraordinarily good at finding and using information.And probably because modern childhood centers aro