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  Where is that noise coming from? Not sure? Try living with your eyes closed for a few years.

  Blind people are better at locating sounds than people who can see, a new study says, without the benefits of vision the ears seem to work much better.

  Previous studies have shown that blind people are better than others at reaching out and touching the sources of sounds that are close by.Researchers from the University of Montreal wanted to see if blind people were also better at locating sounds that are far away.

  Twenty-three blind people participated in the study.All had been sightless for at least 20 years.Fourteen of them had lost their vision before age 11.The rest went blind after age 16.The experiment also included 10 people who could see but were wearing blindfolds(遮眼布、眼罩).

  In one task, volunteers had to pick the direction of a sound coming from about 3 meters away.When the sound was in front of them or slightly off center in front, both groups performed equally well.

  When sounds came from the side or the back, however, the blind group performed much better than the blindfolded group.The participants who had been blind since childhood did slightly better than those who lost their sight later.

  Recognizing the locations of distant sounds can be a matter of life-or-death for blind people, say the researchers.Crossing the street, for instance, is much harder when you can’t see the cars coming.

  Still, the researchers were surprised by how well the blind participants did, especially those who went blind after age 16.In another experiment, the scientists also found that parts of the brain that normally deal with visual information became active in locating sound in the people who were blind by age 11.These brain parts didn’t show sound-location activity in the other group of blind people or in the sighted people.The scientists now want to learn more about the workings of brains of “late-onset” blind people.

(1)

The recent study shows blind people are better at telling _________.

[  ]

A.

the sources of loud sounds

B.

the locations of distant sounds

C.

the direction of sharp sounds

D.

the distance of a sound in front of them

(2)

Which of the following statement is true?

[  ]

A.

The researchers are quite sure about the workings of brains of “late-onset” blind people.

B.

People who were blind before age 11 are better at crossing the street than those after 16.

C.

Parts of the brain of those who went blind by age 11 became active in locating sound.

D.

The blind folded performed better at locating sounds in front.

(3)

If people were asked to tell the direction of a sound from the side, who would perform best?

[  ]

A.

Those who are blind.

B.

Those who have gone blind since children.

C.

Those who went blind at age 16.

D.

Those who are blindfolded.

(4)

What do we know about that parts of brain dealing with visual information are active in locating sounds?

[  ]

A.

This happens in almost all the testers.

B.

This only occurs in the people who were blind after age 16.

C.

It remains nothing new to the scientists any more.

D.

It remains a mystery why it is so.

答案:1.B;2.C;3.B;4.D;
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科目:高中英语 来源:设计必修一英语北师版 北师版 题型:050

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How Long Can People Live?

  She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121st birthday.

  Whe n it comes to long life, Jeanne Calment is the world’s recordholder.She lived to the ripe old age of 122.So is 122 the upper limit to the human life span(寿命)?If scientists come up with some sort of pill or diet that would slow aging, could we possibly make it to 150-or beyond?

  Researchers don’t entirely agree on the answers.“Calment lived to 122, so it wouldn’t surprise me if someone alive today reaches 130 or 135,”says Jerry Shay at the University of Texas.

  Steve Austad at the University of Texas agrees.“People can live much longer than we think,”he says.“Experts used to say that humans couldn’t live past 110.When Calment blew past that age, they raised the number to 120.So why can’t we go higher?”

  The trouble with guessing how old people can live to be is that it’s all just guessing.“Anyone can make up a number,”says Rich Miller at the University of Michigan.“Usually the scientist who picks the highest number gets his name in Time magazine.”

  Won’t new anti-aging techniques keep us alive for centuries?Any cure, says Miller, for aging would probably keep most of us kicking until about 120.Researchers are working on treatments that lengthen the life span of mice by 50 percent at most.So, if the average human life span is about 80 years, says Miller,“adding another 50 percent would get you to 120.”

  So what can we conclude from this little disagreement among the researchers?That life span is flexible(有弹性的),but there is a limit, says George Martin of the University of Washington.“We can get flies to live 50 percent longer,”he says.“But a fly’s never going to live 150 years.”

  “Of course, if you became a new species(物种),one that ages at a slower speed, that would be a different story,”he adds.

  Does Martin really believe that humans could evolve(进化)their way to longer life?“It’s pretty cool to think about it,”he says with a smile.

(1)

What does the story of Jeanne Calment prove to us?

[  ]

A.

People can live to 122.

B.

Old people are creative.

C.

Women are sporty at 85.

D.

Women live longer than men.

(2)

According to Steve Austad at the University of Texas, ________.

[  ]

A.

the average human life span could be 110

B.

scientists cannot find ways to slow aging

C.

few people can expect to live to over 150

D.

researchers are not sure how long people can live

(3)

Who would agree that a scientist will become famous if he makes the wildest guess at longevity?

[  ]

A.

Jerry Shay.

B.

Steve Austad

C.

Rich Miller

D.

George Martin

(4)

What can we infer from the last three paragraphs?

[  ]

A.

Most of us could be good at sports even at 120.

B.

The average human life span cannot be doubled.

C.

Scientists believe mice are aging at a slower speed than before.

D.

New techniques could be used to change flies into a new species.

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