题目内容

Dr．Hans Selye is _____ member of University of Montreal faculty, and he is now organizing _____ International Institute of Stress in Montreal.

[　　]

A．a; the　　　B．a;／

C．the; the　　D．a; an

答案：A

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　　For several years, scientists have been testing a substance called interferon(干扰素), a possible wonder drug that is proving to be effective in treating a variety of diseases, including virus infections, bacterial infections, and cancers．To date, the new drug has no side effect of great influence to discourage its use．But in spite of its success, last year only one gram was produced in the entire world．

　　The reason for the shortage lies in the structure of interferon．A special protein, the interferon produced from one animal species cannot be used in treating another animal species．In other words, to treat human beings, only interferon produced by human beings may be used．The drug is produced by infecting white blood cells with a virus．Fortunately, it is so effective that the amount given to each patient each time is very small．

　　Unlike antibiotics(抗生素), interferon does not attack germs directly．Instead, it protects healthy cells from being infected, and prevents the reproduction of viruses within cells．

　　As you might conclude, one of the most special uses of interferon has been in the treatment of cancer．Dr．Hans Strander, a research physician at Sweden's famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug．Among a group of selected patients who had received operations for advanced cancer, half were given traditional treatments and the other half were given interferon．Among those treated with interferon 70 percent of them remained alive over three years, as compared with only 10 to 30 percent among those who had received the traditional treatments．

　　In the United States, a large-scale project supported by the American Cancer Society is now under way．If the experiment were successful, interferon could become one of the greatest medical discoveries of our time．

(1)

What is the difference between antibiotics and interferon?
[　　]
A．	Interferon has serious side effects, while antibiotics do not．
B．	Antibiotics kill germs by attacking them directly, while interferon does not．
C．	Antibiotics are very effective, while the effect of interferon is limited．
D．	They are different in structure, although they are both proteins．

(2)

According to the passage, if 170 cancer patients received interferon treatment, how many of them would remain alive over three years?
[　　]
A．	About 30．
B．	About 50．
C．	About 120．
D．	About 70．

(3)

The passage tells us that ________．
[　　]
A．	it is difficult to produce interferon in large quantities because of its special structure．
B．	interferon is produced widely in lots of countries．
C．	few of the patients who had received traditional treatments remained alive．
D．	most of the patients who received interferon also needed traditional treatments．

“Humans should not try to avoid stress any more than they would shun food, love or exercise.” said Dr. Hans Selye, the first physician to document the effects of stress on the body. While here’s no 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（设法处理） the challenge were more likely to say they were in good health than those who felt they couldn’t get the job done.

　　Stress that you can manage may 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, subjects believed they had control over the outcome. In the second, they weren’t in control: They had to sit through a gory(血淋淋的) video on surgical procedures. Those who did go on the memory test had an increase in levels of immunoglobulin A, an antibody that's 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（荷尔蒙）. In short bursts these hormones have a positive effect, including improved memory function. “They can help nerve cells handle information and put it into storage,” 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(长寿), “It’s the occasional burst of stress or brief exposure to stress that could be protective.”

1.The passage is mainly about ________.

A. the benefits of manageable stress

B. how to avoid stressful situations

C. how to cope with stress effectively

D. the effects of stress hormones on memory

2. The underlined word “shun” (Line 1, Para.1) most probably means________.

A. cut down on

B. stay away from

C. run out of

D. put up with

3. We can conclude from the study of the 158 nurses in 2001 that ________.

A. people under stress tend to have a poor memory

B. people who can’t get their job done experience more stress

C. doing challenging work may be good for one’s health

D. stress will weaken the body’s defense against germs

4.Dr. Bruce McEwen of Rockefeller University believes that ________.

A. a person’s memory is determined by the level of hormones in his body

B. stress hormones have lasting positive effects on the brain

C. short bursts of stress hormones enhance memory function

D. a person’s memory improves with continued experience of stress

Dr．Hans Selye is _ member of University of Montreal faculty, and he is now organizing _ International Institute of Stress in Montreal.

A.
a; the
B.
a;／
C.
the; the
D.
a; an

"Humans should not try to avoid stress any more than they would shun food, love or exercise." said Dr．Hans Selye, the first physician to document the effects of stress on the body．While here's no 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 （设法处理） the challenge were more likely to say they were in good health than those who felt they couldn't get the job done．

Stress that you can manage may 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, subjects believed they had control over the outcome．In the second, they weren't in control: They had to sit through a gory（血淋淋的） video on surgical procedures．Those who did go on the memory test had an increase in levels of immunoglobulin A, an antibody that's the body's first line of defense against germs, The video-watchers experienced a downtum in the antibody．

Stress prompts the body to produce certain stress hormones（荷尔蒙）. In short bursts these hormones have a positive effect, including improved memory function．"They can help nerve cells handle information and put it into storage," 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（长寿）, "It's the occasional burst of stress or brief exposure to stress that could be protective．"

1．The passage is mainly about .

A．the benefits ofmanageable stress

B．how to avoid stressful situations

C．how to cope with stress effectively

D．the effects of stress hormones on memory

2．The underlined word "shun" （Line l, Para．l） most probably means .

A．cut down on B．stay away from

C．run out of D．put up with

3．We can conclude from the study ofthe 158 nurses in 2001 that .

A．people under stress tend to have a poor memory

B．people who can't get theirjob done experience more stress

C．doing challenging work may be good for one's health

D．stress will weaken the body's defense against germs

4．Dr．Bruce McEwen of Rockefeller University believes that .

A．a person's memory is determined by the level of hormones in his body

B．stress hormones have lasting positive effects on the brain

C．short bursts of stress hormones enhance memory function

D．a person's memory improves with continued experience of stress

Dr．Hans Selye is _____ member of University of Montreal faculty, and he is now organizing _____ International Institute of Stress in Montreal.

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Dr．Hans Selye is _ member of University of Montreal faculty, and he is now organizing _ International Institute of Stress in Montreal.