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Holding a cell phone against your ear or stalling it in your pocket may be hazardous to your health.

       This paraphrases a warning that cell phone; manufacturers include in the small print that is often tossed aside when a new phone is purchased.Apple, for example, doesn't want iP hones to come closer to you than 1.5 centimeters; Research In Motion, Blackberry's manufacturer, recommends 2.5 centimeters.

       If health issues arise from cell phone use, the implications are huge.Voice calls - Americans chat on cell phones 2.26 trillion minutes annually - generate $109 billion for the wireless carriers.

       Devra Davis, an epidemiologist who has worked for the University of Pittsburgh, has published a book about cell phone radiation, "Disconnect." The book surveys scientific research and concludes the question is not settled.

  Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.

  "Most cancers have multiple causes," she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.

  Children are more vulnerable to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid. No studies have yet been completed on cell phone radiation and children, she says.

  Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiofrequency radiation had damaged DNA in their brains.

  Ms. Davis recommends using wired headsets or the phone's speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen.

We can infer from the passage that________.

       A.Cell phone may do harm to our health if we hold it against our ear or store in our pocket

       B.Devra Davis thinks that there are many factors contributing to cancer.

       C.The increase in brain cancer in the young adults may have something to do with cell phone

       D.Children are more likely to be affected by radiation

According to the passage, how could children avoid being hurt by cell phone radiation?

       A.They can keep cell phones away from the abdomen.

       B.They can send short massage instead of making phone calls directly.

       C.They can pay more attention to the small print on the phone.

       D.They should use more advanced cell phones.

From this passage we can learn that.________.

       A.American cell phone manufacturers did not give any warning to their customers

       B.American cell phone manufacturers benefit greatly from their products

       C.Scientists have found the connection between brain cancer and ceil phone

       D.Cell phone should be banned because of the increase in brain cancer

In which column can we most probably read this passage?

       A.Advanced technology.       B.Entertainment.

       C.Science and life.            D.Celebrity.

【小题1】C

【小题1】B

【小题1】B

【小题1】C


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D

Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.

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Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains.

Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen(腹部).

1.Why is the warning in the small print?

A.They think people will not care about it.

B.There is not enough space for the warning.

C.They don’t want the users to pay attention to it.

D.The warning is not important at all.

2.What does the underlined word in sixth paragraph probably mean?

A.acceptable        B.valuable           C.accessible         D.easily affected

3.What can we conclude from the last paragraph?

A.Pregnant women should keep cell phones away.

B.People should use cell phones in the correct way.

C.If you are a child, you’d better text than make phone calls.

D.When you use a cell phone, use a wired headset or the phone’s speaker.

4.What does the passage mainly talk about?

A.Be careful when using cell phones.

B.Don’t hold your cell phone against your ear.

C.Rats exposed to radiation have damaged DNA in their brains.

D.Low-energy radiation could damage cells that could lead to cancer.

 

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Meekins, whose eyes were trained to cut through rain and surf mists, thought he saw the signal, but so much spray (水雾) covered the lookout windows that he could hardly make sure. Still, he took no chances. After summoning (召集) the station keeper, Captain Richard Etheridge, Meekins set off a coston signal, a signal made by using lamps of different colors. Together, the two men searched the darkness for a reply. A few moments later, they saw a flash of light to the south and knew a shop was in distress (遇险). Even before the return signal burned out, Etheridge had summoned his men and begun rescue operations.

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Even when the rescue equipment proved useless, Etheridge refused to give up. Choosing two of his strongest surfmen, he tied rope lines around their waists and sent them into the water. The two men, holding a line from shore, walked with huge effort as far as they could before diving through the waves. Nearly worn out while swimming against the tide, they finally made it to the shore.

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That night, as the exhausted survivors lay sleeping and his lifesaving crew rested, Captain Etheridge picked up his pen, and in the light of an oil lantern, wrote with satisfaction that all the people onboard had been saved and were “sheltered in this station”—words he would remember for many years to come.

1.The beach patrols were canceled because ________.

  A. Meekins paid enough attention to the horizon

B. there was too much spray on the windows

C. the winds and tide were too strong

D. there was no ship near the station

2.The underlined word “foundered” in Paragraph 4 is closest in meaning to “___________”.

  A. stopped          B. sank          C. sailed          D. arrived

3.What was the author’s main purpose in writing the passage?

  A. To warn sailors of the dangers of hurricanes.

B. To create a story describing a rescue at sea.

C. To inform people about Richard Etheridge.

D. To record the details about the Newman.

4.What is the main idea of the passage?

  A. The newman was very dangerous before Richard Etheridge and his team members saw the signal.

B. A terrible hurricane took place off the coast of North Carolina and threatened the lives of many sailors.

C. At no other time in American history have so many shipwrecked passengers survived such a violent storm.

D. All the passengers of a shipwreck were rescued because of heroic the efforts of a special leader and his crew.

 

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