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"Humans should not to try to avoid stress any more than they would shun food, love or exer

cise", said Dr. Hans Selye, the first physician to document the effects of stress on the body. While here is the question that continuous stress is harmful, several studies suggest that challenging situations in which you're able to rise to the occasion can be good for you.

In a 2001 study of 158 hospital nurses, those who faced considerable work demands but coped with the challenge were more likely to say they were in good health than those who felt they stress that you can manage also boost immune (免疫的) function, in a study at the Academic Center for Dentistry in Amsterdam, researchers put volunteers through two stressful experiences: in the first, a timed task that required memorizing a list followed by a short test; in the second, subjects through a gory (血淋淋的)video on surgical procedures. Those who did well on the memory test had an increase in levels of immunoglobulin A, an antibody that is the body's first line of defense against germs. The video-watchers experienced a downturn in the antibody.

Stress prompts the body to produce certain stress hormones. In short busts these hormones have a positive effect, including improved memory function. "They can help nerve cells handle information and put it into shortage," says Dr. Bruce McEwen of Rockefeller University in New York. But in the long run these hormones can have a harmful effect on the body and brain.

"Sustained stress is not good for you," says Richard Morimoto, a researcher at Northwestern University in Illinois studying the effects of stress on longevity, "It is the occasional burst of stress or brief exposure to stress that could be protective."

The passage is mainly about ______.

A.the benefits of manageable stress

B.how to avoid stress

C.how to cope with stress effectively

D.the effect of stress harmonies on memory

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更多“"Humans should not to try to a…”相关的问题
第1题
But eighty or even ninety...normal life-span for humans(paragraph 3) is closet in meaning

But eighty or even ninety...normal life-span for humans(paragraph 3) is closet in meaning to

A.on average, people now live to be over eighty.

B.we should recognize that people now live to between eighty and ninety on average.

C.nowadays it isn't normal for people to die younger than eighty.

D.average life expectancy is increasingly being considered to be eighty or more.

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第2题
听力原文: The Food and Drug Administration is, again, threatening to impose milk and meat
from cloned animals on a public that opposes the technology and its products.

Respected polls report that more than 60% of Americans think animal cloning is immoral, and that most people said they wouldn't knowingly eat the products even if the FDA approved them. But because the FDA would allow cloned meat and milk to be sold without identifying labels, consumers wouldn't be able to avoid them. The FDA has consistently tilted toward those who want cloned milk and meat in our food. Agency officials have repeatedly asserted that science shows cloned milk and meat are safe for humans. But the FDA has never published the complete scientific studies it says support that claim.

The argument that cloning is safe for animals is unconvincing. Cloned meat and milk offer no public economic benefits. Having cloned cows produce more milk wouldn't reduce milk prices. US farmers produce more milk than we drink, and the government is required to buy the surplus, Since 2000, dairy support programs have cost taxpayers more than$5 billion.

Most important, this first decision to advance animal biotechnology raises ethical issues beyond the FDA's expertise. Techniques used to clone animals will advance the ability to clone humans -- and create animals with human genes. Neither the agency nor animal scientists are qualified to tall us whether and when it is ethically acceptable for humans to alter the essential nature of animals. We need a national discussion, including ethicists and religious leaders, to consider the wisdom of cloned and transgenic animals. Given die risk of unintended consequences, we should proceed cautiously. The president should halt further FDA action on cloning and set in motion a process for beginning this broader discussion.

(22)

A.It isn't reliable.

B.It needs checking.

C.It is definitely trustworthy.

D.It won't hurt to try.

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第3题
听力原文:The Food and Drug Administration is, again, threatening to impose milk and meat f

听力原文: The Food and Drug Administration is, again, threatening to impose milk and meat from cloned animals on a public that opposes the technology and its products.

Respected polls report that more than 60% of Americans think animal cloning is immoral, and that most people said they wouldn't knowingly eat the products even if the FDA approved them. But because the FDA would allow cloned meat and milk to be sold without identifying labels, consumers wouldn't be able to avoid them. The FDA has consistently tilted toward those who want cloned milk and meat in our food. Agency officials have repeatedly asserted that science shows cloned milk and meat are safe for humans. But the FDA has never published the complete scientific studies it says support that claim.

The argument that cloning is safe for animals is unconvincing. Cloned meat and milk offer no public economic benefits. Having cloned cows produce more milk wouldn't reduce milk prices. US farmers produce more milk than we drink, and the government is required to buy the surplus, Since 2000, dairy support programs have cost taxpayers more than$5 billion.

Most important, this first decision to advance animal biotechnology raises ethical issues beyond the FDA's expertise. Techniques used to clone animals will advance the ability to clone humans -- and create animals with human genes. Neither the agency nor animal scientists are qualified to tall us whether and when it is ethically acceptable for humans to alter the essential nature of animals. We need a national discussion, including ethicists and religious leaders, to consider the wisdom of cloned and transgenic animals. Given die risk of unintended consequences, we should proceed cautiously. The president should halt further FDA action on cloning and set in motion a process for beginning this broader discussion.

(33)

A.Neutral.

B.Opposed.

C.Approving.

D.Supportive.

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第4题
According to the report of the United Nations, humans should ______ (为全球变暖负责).

According to the report of the United Nations, humans should ______ (为全球变暖负责).

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第5题
Why did languages have to develop and evolve to meet the challenges?A.Early humans should

Why did languages have to develop and evolve to meet the challenges?

A.Early humans should have communication in tracking game.

B.Language can enable humans to compete with other top predators.

C.Animals should understand the orders given by humans.

D.Language could give a rapid and bizarre switch for any animal.

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第6题
Some people feel that apes should be given special treatment because.A.they are geneticall

Some people feel that apes should be given special treatment because.

A.they are genetically similar to humans

B.they can help final a cure for "mad cow" disease

C.they possess a consciousness superior to humans

D.they are treated poorly by scientists

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第7题
The Great Ape Project believes that apes deserve legal protection because.A.they are very

The Great Ape Project believes that apes deserve legal protection because.

A.they are very much like humans

B.they are conscious of things

C.they are natural animals and should be protected

D.they are free from imprisonment ad torture

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第8题
The word "chronotherapy" (second sentence, last paragraph) means a treatment which ______.

The word "chronotherapy" (second sentence, last paragraph) means a treatment which ______.

A.reduces the toxic effects by decreasing the amount of medicine-taking

B.balances the effect of the medicine in accordance with humans' different functions in a day

C.allows patients to choose the time to take medicine as they like

D.patients should follow the time of taking medicine according to the paper instructions

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第9题
Give Up Six Words and Change Your LifeAlfred Korzybski, the father of general semantics, o

Give Up Six Words and Change Your Life

Alfred Korzybski, the father of general semantics, observed that how we talk affects how we handle problems and how we behave. He found that scientists, trained to be specific, handled both personal and laboratory problems better than non-scientists. Non-scientists, then as now, used words loaded with feeling and prejudgment and got into trouble.

Changing the way we use certain everyday words can actually shift the way we see the world and other people, helps change the emotion-laden attitudes behind the words, and makes us less likely to make inappropriate demands on ourselves and others.

There is also a change in the effect on others. Teachers, told that certain students have hidden talents, will help them develop, even if the students were selected blindly by researchers. People act as they think they have been defined, and like it or not, our words play a large part in expressing that definition.

In our work, we have found six words that are often used in damaging ways: try, always, is, can't, should and everybody. These words are really "families" of words. Always can be expanded to never, every time. Should is also ought to, must, have to. We use nobody, no one, all, 'the way we use everybody.

Each of these words is linked to the concept of time. "Everybody does it" implies every person always does it. Should reflects a standard adopted in the past, governing how we must always behave. Is implies a permanent characteristic of something or someone, as "she is impossible to deal with." Alfred Korzybski called humans "time binders". Facts, opinions and behaviors are learned, repeated and passed on, even though they may not necessarily have been true in the first place. Both Korzybski and S. I. Hayakawa, who is a respected semanticist, caution us against using such "allness" terms.

Yet we do use them, as though by doing so we could somehow manage the present and future. "With words," says Hayakawa in Language in Thought and Action, "we influence and to an enormous extent control." "I'll meet you at three Thursday" is an attempt to make another person--and ourselves --be at a certain place at a certain time. Hayakawa writes, "The future is a specifically human dimension. To a dog, 'hamburger tomorrow' is meaningless. With words we [humans] impose a certain predictability upon future events."

Similarly, we attempt to control people's actions and even characteristics with can't, should, everybody and related words. We try thus to create "reliable" data, however unrelated it is to the facts.

According to Freud, to some mental patients certain words become magical, symbols of whole trains of thought condensed. Seriously ill neurotics maintain some of that magic: "Everybody's against me" or "I have to do this." And nearly all of us have the same bad habit to a less intense degree.

When and where do we begin this pattern of restrictive words and beliefs?

According to the late speech expert Wendell Johnson, as adults we are still "using information, attitudes, beliefs, procedures, practices ... adapted to an earlier time." Our beliefs, and the words we use to support them and to protect ourselves from change, come from early in our lives. Willis Harman, Ph. D., a futurist at SRI (formerly Stanford Research Institute), maintains that we are all in a way hypnotized from infancy. "We do not perceive ourselves and the world about us as they are, but as we have been persuaded to perceive them," says Dr. Harman. Research shows that objects and people with some familiar characteristics tend to be perceived by the infant as identical. The newborn cannot distinguish between self and surrounding. When the baby is hungry, everybody is hungry. Later, any man becomes "Daddy" and every animal "doggie."

We use such early biases to m

A.Y

B.N

C.NG

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第10题
Professor Bruce Lahn of the University of Chicago predicts that____. A)humans won’t ha

Professor Bruce Lahn of the University of Chicago predicts that____.

A)humans won’t have to donate organs for transplantation

B)more people will donate their organs for transplantation

C)animal organs could be transplanted into human bodies

D)organ transplantation won’t be as scary as it is today

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第11题
A.Why species don't avoid extinction by adapting.B.Why species become extinct at the r

A.Why species don't avoid extinction by adapting.

B.Why species become extinct at the rate they do.

C.Why humans aren't extinct.

D.How many species aren't extinct.

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