成人本科学士学位英语统一考试
2011.05.07
Part I Reading Comprehension (30%)
转天
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.
Passage 1
Questions 1 to 5 are bad on the following passage:
Spending 50 minutes with a cell phone clo to your ear is enough to change brain cell activity in the part of the brain clost to the antenna (天线). But whether that caus any harm is not clear, scientists at the National Institute of Health said at a conference last mont
h, adding that the study will not likely ttle concerns of a link between cell phones and brain cancer. "What we showed is gluco (葡萄糖) metabolism (代谢) (a sign of brain activity) increas in the brain in people who were expod to a cell phone in the area clost to the antenna," said Dr. Nora Volkow of the NIH, who 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 caud by wireless phone signals.
Volkow said she was surprid that the weak electromagnetic radiation (电磁辐射有关自信的作文) from cell phones could affect brain activity, but she said the findings do not shed any light on whether cell phones cau Cancer. "This study does not in any way indicate that. What the study does is to show the human brain is nsitive to electromagnetic radiation from cell phone exposures." U of the devices has incread dramatically since they were introduced in the early 1980s, with about 5 billion cell phones now in u worldwide.
Some studies have linked cell phone exposure to an incread risk of brain cancers, but a large study by the World Health Organization did not offer a clear answer to this. Volko
w'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 increa in brain metabolism in the region clost 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 incread gluco 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 the effects,” they wrote.
1. According to the passage, which of the following is TRUE?
A. Cell phone u is dangerous.
B. Cell phone u caus cancer.
C. The human brain is an electromagnetic field.
D. There are about 5 billion cell phone urs in the world right now.后羿射箭的故事
笔记本cpu性能排行 2. Doctor Volkow was astonished becau___________.
A. her rearch has shed light on her understanding of cell phone
B. she found that cell phone exposure is harmful to human brain
下过雨的夏天傍晚 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
3. According to the passage, cell phones were launched____________.
什么来居上 A. in the late 1970s B. between 1980 and 1985
C. in the late 1980s D. in the early 1990s
4. What does the word “that” stand for in the cond paragraph?
A. Brain activity.
B. Her rearch findings.
流沙地 C. The fact that cell Phone u may cau cancer.
邮件营销
D. Her rearch progress.
5. Which of the following is an appropriate title for this passage?
A. Cell Phone Radiation: Is It Harmful?
B. Cell Phone Radiation: Is It Uful?
C. Cell Phone Radiation: Is It Healthy?
D. Cell Phone Radiation: Is It Weak?
Passage 2
Questions 6 to 10 are bad on the following passage:
Human beings have always had an ability to attend to veral things at once. (78) Nor is electronic multitasking entirely new: We've been driving while listening to car radios since they became 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 veral IM (即时通讯) conversations, watch TV and u the computer all at once.
But what's the impact of this. media consumption? And how are the multitasking devices changing how kids learn, reason and communicate with one another? Social scientists and educators are just beginning to deal with the questions, but the rearchers already have some strong opinions.
