成人英语三级

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Part I Reading Comprehension (30%)

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 I to 5 are based on the following passage:

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 bu 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。

1. 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。

1.问题问“依据文章内容来看，下面哪个选项陈述意义正确?”

答案为D(现在全世界有大约50十亿手机用户)

文章相关句：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。

(自从手机在20世纪80年代初期被生产出来， 手机的使用就显著增加了，现在全世界有大约50十亿手机用户)

2. 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

2.问题问“Volkow博士很震惊，原因是…?”

答案为C(她发现使用手机大约50分钟可能会影响或改变大脑的活动。)

文章相关句：Volkow said she was surprised that the weak electromagnetic radiation(电磁辐射) from cell phones could affect brain activity,( Volkow博士说她很震惊的是手机发出的微弱的电磁辐射会改变大脑的活动。 下文中提到了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。(Volkow博士对两组研究对象进行了研究，结果发现仔手机开机50分钟的那一组中， 最靠近天线的那部分那脑区域新陈代谢增加了7%)

3. According to the passage, cell phones were launched _______。

A. in the late 1970s B. between 1980 and 1985

B. in the late 1980s D. in the early 1990s

3.问题问“根据文章来看，手机在什么时候被投放市场? ”

答案为B(1980和1985年之间)

文章相关句： Use of the devices has increased dramatically since they were introduced in the early 1980s, (自从手机在20世纪80年代初期被生产出来， 手机的使用就显著增加了)

4. What does the word “that” stand for in the second sentence of the first paragraph?

A. Brain activity。

B. Her research findings。

C. The fact that cell phone use may cause cancer。

D. Her research progress。

4.问题问“第二段中的that指什么?”

答案为C(使用手机可能造成癌症的事实)。

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. 代词that所在的句子说”这个研究没有显示那个“回指上文中的内容。 根据代词回指上文内容，上文内容谈及”手机可能造成癌症“， 因此C是答案。

5. Which of the following is an appropriate title for this passage?

A. Cell Phone Radiation: Is It Harmful?

B. Cell Phone Radiati0n: Is It Useful?

C. Cell Phone Radiation: Is It Healthy?

D. Cell Phone Radiation: Is It Weak?

5.问题问”这篇文章合适的标题是什么?“答案为A(手机辐射有害吗?)。这篇文章主要讨论手机辐射对大脑的影响。

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