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　　Where did you see a polar bear? At a zoo, perhaps If you had attended a winter activity in New York a few years ago, you would have seen a whole polar bear club. These “Polar Bears” are people who meet frequently in the winter to swim in freezing cold water. That day, the air temperature was 3℃, and the water temperature was a bit higher. The members of the Polar Bear Club at Coney Island , New York are usually about the age of 60. Members must satisfy two requirements. First, they must get along well with everyone else in the group; this is very important because there are so many different kinds of people in the club. Polar Bears must also agree to swim outdoors at least twice a month from November through February.

　　Doctors do not agree about the medical effects of cold-water swimming. Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart best stops. Other doctors, however, point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter.

　　The Polar Bears themselves are satisfied with the benefits of cold-water swimming. They say that their favourite form of exercise is very good for the circulatory system （循環(huán)系統(tǒng)） because it forces the blood to move fast to keep the body warm. Cold-water swimmers usually turn bright red after a few minutes in the water. A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming.

　　The main benefits of cold-water swimming are probably mental. The Polar Bears love to swim all the year round; they find it fun and relaxing. As one 70-year-old woman says, “When I go into the water, I pour my troubles into the ocean and let them float away.”

1．Which of the following is NOT necessary for members of the Polar Bear Club? ________.

[　　]

A．They should be easy to make friends with

B．They must swim outdoors at least 8 times in the four cold months

C．They must agree to swim outdoors from November through February

D．They must have reached the age of 60

2．Doctors ________.

[　　]

A．encourage people to take part in cold-water swimming actively

B．point out the possible danger of blood illness during cold-water swimming

C．believe swimming is helpful both in winter and in summer

D．have different ideas about the medical effects of cold-water swimming.

3．According to the passage, some doctors believe it is true that ________.

[　　]

A．you are healthy if cold-water swimming turns your skin color blue

B．there is more danger of a heart attack during summer swimming

C．cold-water swimming can make the body temperature dangerously high

D．Polar Bears are bears swimming in freezing water

4．The Polar Bears like to swim all the year round because ________.

[　　]

A．they can remain young

B．it is an easy way to keep the body warm in winter

C．they find it enjoyable and interesting

D．they might meet fewer troubles in life

5．The passage is mainly about ________.

[　　]

A．a(chǎn) group of cold-water swimming lovers

B．the Polar Bears' life in New York

C．doctors' ideas about cold-water swimming

D．the requirements of the Polar Bear Club

答案：D;D;B;C;A
解析：

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科目：高中英語 來源：設(shè)計必修一英語北師版 北師版 題型：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(壽命)?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(有彈性的)，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(物種)，one that ages at a slower speed, that would be a different story,”he adds．

　　Does Martin really believe that humans could evolve(進(jìn)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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