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  Headaches associated with air travel appear to be a“huge and painful problem”, Israeli researchers report.

  In a study of 906 men and women who had traveled more than once by plane, nearly 6% reported that they experienced headaches associated with flying.

  There are a number of mechanisms that could contribute to headaches during air travel, including stress, poor air quality, engine noise and changes in barometric pressure(大气压), the investigators note.To investigate the prevalence(盛行)of flight-associated headaches, they surveyed visitors to the travel clinic at their medical center.

  More than one in five of the study participants had headaches at least once a month that weren't related to flying, the researchers found.But just over half of the 5.7% who reported flight-associated headaches suffered headaches this frequently.They were also slightly more likely to have migraines(偏头痛).Two-thirds of those who suffered flight-associated headaches were women, and one-third had a family history of headache.

  Among the flight-associated headache sufferers, 19.2% said they had headaches every time they flew.Nearly a quarter said their headaches got worse as the plane climbed, while a fifth said the pain became worse as the plane descended to the Dead Sea, which is about 400 meters below sea level, suggesting that barometric pressure may be a factor.

  This study, the researchers conclude, suggests that flight-associated headache “seems to affect a significant number of the travel population”.

(1)

According to the research, how many people reported that they experienced headaches associated with flying?

[  ]

A.

About 906

B.

About 54

C.

About 362

D.

About 231

(2)

Which of the following doesn't contribute to headaches during air travel?

[  ]

A.

Poor air quality

B.

Noise of the engine

C.

Atmosphere

D.

Stress

(3)

The researches found ________.

[  ]

A.

more than half of the study participants had headaches at least once a month

B.

just over half of the study participants had a family history of headache

C.

nearly a quarter said they had headaches every time they flew

D.

two-thirds of those who suffered flight-associated headaches were women

(4)

The underlined word“descended”probably means ________.

[  ]

A.

fell

B.

raised

C.

landed

D.

flew

答案:1.B;2.C;3.D;4.A;
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  In the United States, boys and girls start school when they are five years old. In some states they must stay in school until they are sixteen. Most students are seventeen or eighteen years old when they graduate from secondary school. Another name for secondary school is high school.

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  Suppose we built a robot(机器人)to explore the planet Mars.We provide the robot with seeing detectors(探测器)to keep it away from danger.It is powered entirely by the sun.Should we program the robot to be equally active at all times?No.The robot would be using up energy at a time when it was not receiving any.So we would probably program it to stop its activity at night and to wake up at dawn the next morning.

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about the danger of men working at night

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Evolution has equipped all creatures with a regular pattern of sleeping and waking.

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sad regret

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A.

that was one of his milestone

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he paid the bill but he didn’t want to

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suddenly I found myself no longer a kid

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[  ]

A.

One day is worth two tomorrow

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To save time is to length life

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When an opportunity is lost, it never comes back to you

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阅读理解:

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[  ]

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rich of fruits and animals to be served as food

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not very thick as they could advance slowly by cutting the branches

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full of ancient trees

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Escape

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How to Survive on a boat

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