页面未找到 - 233网校

哎呀,您访问的页面不存在!

您输入的网址不正确,或者该网址不存在。

10秒后跳转到233网校首页 返回首页

页面未找到 - 233网校

哎呀,您访问的页面不存在!

您输入的网址不正确,或者该网址不存在。

10秒后跳转到233网校首页 返回首页

您现在的位置:233网校>学位英语>历年真题

2011年5月北京成人学位英语考试真题及答案解析

来源:233网校 2017年4月4日

2011年5月北京成人学位英语考试真题及答案解析>>点击查看试题答案

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.

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 month, 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 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 caused

by wireless phone signals.

Volkow said she was surprised that the weak electromagnetic radiation(电磁辐射) from cell

phones could affect brain activity, but she said the findings do not shed any light on whether cell

phones 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 increased 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 team 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 antenna

when the 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 the

University 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 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 phone

B.she found that cell phone exposure is harmful to human brain

C.she found that using a cell phone for about 50 minutes could influence or change brain activity

D.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 1985

C.in the late 1980s D.in the 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 Harmful?

B.Cell Phone Radiation: Is It Useful?

C.Cell Phone Radiation: Is It Healthy?

D.Cell Phone Radiation: Is It Weak?

答案:A

学位英语考试:2017学位英语考试试题题型详解学位英语考试报名准考证打印时间及入口

告别盲目备考,讲师全程把关特训,2017年成人学位英语考试一次过不是问题!点击进入>>

责编:cll
页面未找到 - 233网校

哎呀,您访问的页面不存在!

您输入的网址不正确,或者该网址不存在。

10秒后跳转到233网校首页 返回首页

登录

新用户注册领取课程礼包

立即注册
扫一扫,立即下载
意见反馈 返回顶部