A study reveals that the brain areas that respond when fear is learned through personal experience are al-so triggered when we see someone else in distress.
In the study, participants watched a short video of a person conditioned to fear a so-called neutral stimulus-something people normally wouldn't fear--paired with something they find naturally aversive (令人讨厌的), in this case an electrical shock. The person in the video watched colored squares on a computer screen: When a blue square appeared, the person received a mild shock; when a yellow square appeared, there was no shock. The participant in the video responded with distress when the blue square appeared—he would blink hard, tense his cheek muscles and move his hand. "So it's clear that he's uncomfortable, he's in distress," said study team member Andreas Olsson of Columbia University. "And he's already in distress before he receives the shock, you see him anticipate receiving the shock." By contrast the participant in the video appeared relaxed when the yellow square popped up,
Participants were told they would take part in a similar experiment, and when presented with the blue square, they responded with fear, anticipating a shock, though they were never actually shocked. "Just by watching, they learn themselves," Olsson explained.
This second learning was reflected in the brain. In previous classical conditioning experiments where a fear is learned firsthand, a part of the brain called the amygdala (扁桃核) has been shown to be critical to the development and expression of fears. The scientists monitored the brain activity of each participant during the experiment. Imaging showed that the amygdala responded both when the subjects watched the video of someone else receiving shocks and when they were presented with the blue squares themselves.
"We found that the amygdala is involved both when you're watching somebody receiving shocks, and when you're expecting to receive shocks later on yourself," Olsson said. So it seems that similar processes in the brain are triggered both when fears are experienced first-hand and when they are observed in others.
In the real world, the finding could explain why some people are afraid of things despite little contact with them. "You learn by observing other people's emotional expressions, and what we are showing is that that can be as effective as having those direct experiences yourself," Olsson said. "That's probably one of the reasons why a lot people are having phobias (恐怖症) of certain kinds of stimuli, such as snakes and spiders."
What's people's response to a neutral stimulus?
A.Normally they are not scared by it.
B.Usually they are seriously scared by it.
C.They feel ridiculous when seeing it.
D.They often feel uncomfortable at it.
时间:2023-01-16 15:59:30
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Ⅲ. There are four choices following each statement. Mark the choice that can best complete the statement: If a linguistic study describes and analyzes the language people actually use, it is said to be ()
A . prescriptive
B . analytic
C . descriptive
D . linguistic
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A system administrator’s daily monitoring has revealed a failing disk drive. The drive that is failing, hdisk0, is a lvm mirrored drive. What is the first step that should be taken in order to physically replace this drive?()
A . Remove the physical volume from the system.
B . Remove the physical volume from the volume group.
C . Remove the physical partitions from the volume group.
D . Remove the logical volume copies from the failing drive.
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One thing that attracts me about this online course is that all the teachers will reveal a little about the contents of the next _____ by raising a question.
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records reveal that the earliest of human figures were found in the Zhou Dynasty.
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The change from traditional costing to activity-based costing may reveal that:
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The video on the Foxconn suicides in 2010 revealed that …
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Paraphrase the underlined words in the following sentence. There’s a likelihood, however, that half or more of your study time will be devoted to such books.
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From the dialogue, we know that no matter what you are learning, studying is a good way to ( ).
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Which of the following movement reveals that the speaker is inexperienced and very nervous?
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A study shows that students living in non-smoking dorms are less likely to_____ the habit of smoking.
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Studies show that the things that contribute most to a sense of happiness cannot be bought, ________ a good family life, friendship and work satisfaction.
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which the mind and body are considered integral parts of the whole being, and both aspects are examined together. Studies have shown that a continuing state of ______
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The strong axiom of revealed preference says that if a consumer bought x when he could have a orded y and y when he could have a orded z ;then he will buy x whenever he can afford z.
A:对
B:错
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189The utility of network-based schedules: A.Reveals interdependencies. B.Facilitates "wha
189 The utility of network-based schedules:
A. Reveals interdependencies.
B. Facilitates "what if" exercises.
C. Highlights critical activities.
D. Provides information on resource requirements, time requirements and tradeoffs.
E. All of the above
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______ is a branch of linguistics that studies bow words are combined to form. sentences and the rules that govern the formation of sentences.
A.Semantics
B.Pragmatics
C.Syntax
D.Morphology
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University of Arizona researcher Dr. William Rathji says that after a study based on looking into garbage cans, the average family wastes at least $150 per year in food.
"Homemakers go out of their way to save pennies at the store and then don't realize that waste of edible (可食用的) foods adds up much more at home," said Dr. Rathji. He was one of about 100 food experts who met in Boise for a conference on food waste and ways to prevent it.
American families throw out between 8% and 20% of edible food at a cost of $4.5 billion per year. That's almost as much as the federal government spends every year for food stamps and child nutrition programs.
He found that food items which are costly and in short supply tend to be wasted more. During the 1973 meat shortage, meat waste increased to 9%, compared with 3% in 1974 and 1975. Sugar and sugar products waste jumped to 19% in 1975, when sugar prices doubled from the previous year.
Dr. Rathji theorizes that high prices force consumers to experiment, sometimes buy in large quantities. In the case of meat, sometimes low-priced cuts for unappetizing varieties are purchased, consumers then tend to waste more.
His theory is that the more variety in food bought, the more wasted. Regular bread is wasted at about a 10% rate, but specialty breads and rolls are wasted at a 20% rate.
If people are eating the same thing every day, they learn how to manage it. But if you're trying to pull something out of the cookbook every night, that's bound to be some waste.
Another finding is that lower income families waste less food than middle and upper income families. And the study found that dog food, which accounts for 8% of a shopping cart, is rarely wasted. Fresh produce and frozen items are more likely to be wasted.
The study also showed people with the most knowledge of safe, edible food waste the least. Much food is tossed out because a homemaker suspects it is spoiled when it is not.
1、Large quantities of food are thrown out because a homemaker____.
A、thinks they are not delicious
B、 says they taste bitter and hot
C、thinks they smell bad
D、 suspects they are spoiled when they are not
2、American families throw out between____of edible food every year.
A、5%~8%
B、 8%~10%
C、 20%~28%
D、8%~20%
3、When sugar prices doubled, waste of sugar____.
A、went down
B、went up
C、stayed the same
D、was cut in half
4、Which of the following statements is true?____
A、American housewives are not good homemakers.
B、Upper-income families are more wasteful than lower-income ones.
C、American families throw away almost as much food as they consume.
D、Americans waste a great deal of dog food.
5、When do American families waste more food?____
A、When prices are high.
B、When food is scarce.
C、When they think it is spoiled.
D、All of the above.
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Many women who battle breast cancer will tell you it's a life-changing experience. However, a new study shows that for many (51) , the changes aren't always positive or permanent.
Beth Snoke has watched her mother and both grandmothers battle and survive breast (52) So when she was diagnosed, there was no doubt in her mind (53) she had to do.
"I do exactly what the doctors say as far as the medicine that I'm on, as (54) as the vitamins, the diet, and the fitness. And I can't stress enough (55) important that is," says Beth Snoke. But a surprising new study shows that (56) every woman who beats breast cancer is getting that message. In fact, nearly 40% of them say even (57) surviving breast cancer, they haven't made significant changes in the (58) they eat or how much they exercise.
"Not all survivors are taking advantage of this teachable moment and making positive health changes in (59) life," says Electra Paskett, PhD, at Ohio State University's Comprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment, they may (60) play a role in preventing some cancers from coming back (61) growing evidence, some women just aren't listening.
"Colon cancer survivors (62) exercise have actually been shown to have improved survival rates. So, yes, it is true that perhaps by making some of these healthy choices we can actually increase their health," says Paskett.
As a breast cancer survivor (63) , Paskett knows first hand how much difference diet and exercise can (64) The challenge, she says, is to get more survivors to be more like Beth, during and after treatment.
Experts say exercising more and eating a healthier diet can also cut (65) on stress and help women overcome depression. There are more than 2 million breast cancer survivors living in the U.S. Of those, nearly a million have yet to change their diet or exercise routines.
51. A. women
B. people
C. persons
D. men
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He is()to study harder in the future so that he could have more opportunities to find a better job.
A.resorted
B.resolved
C.requested
D.reserved
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The change hi Japanese life-style. is revealed in the fact that ______.
A.the young are less tolerant of discomforts in life
B.the divorce rate in Japan exceeds that in the U.S.
C.the Japanese endure more than ever before
D.the Japanese appreciate their present life
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According to reports in major news outlets, a study published last week included a startling discovery: the nation's Jewish population is in shrinking. The study, the National Jewish Population Survey, found 5.2 million Jews living in the United States in 2000, a drop of 5 percent, or 300,000 people, since a similar study in 1990. What's truly startling is that the reported decline is not tree. Worse still, the sponsor of the $6 million study, United Jewish Communities, knows it.
Both it and the authors have openly admitted their doubts. They have acknowledged in interviews that the population totals for 2000 and 1990 were reached by different methods and are not directly comparable. The survey itself also cautions readers, in a dauntingly technical appendix, that judgment calls by the researchers may have led to an undercount. When the research director and project director were asked whether the data should be construed to indicate a declining Jewish population, they flatly answered no. In addition, other survey researchers interviewed pointed to other studies with population estimates as high as 6.7 million.
Despite all this, the two figures --5.2 million now, 5.5 million then --are listed by side in the survey, leaving the impression that the population has shrunk. The result, predictably, has been a rash of headlines trumpeting the illusionary decline, in turn touching off jeremiads by rabbis and moralists condemning the religious laxity behind it. Whether out of ideology, ego, incompetence or a combination of all three, the respected charity has invented a crisis.
United Jewish Communities is the coordinating body for a national network of Jewish philanthropies with combined budgets of $2 billion. Its population surveys carry huge weight in shaping community policy. This is not the first time the survey has set off a false alarm. The last one, conducted by a predecessor organization, found that 52 percent of American Jews who married between 1985 and 1990 did so outside the faith. That number was a fabrication produced by including marriages in which neither party was Jewish by anyone's definition, including the researchers.
Its publication created a huge stir, inspiring anguished sermons, books and conferences. It put liberals on the defensive, emboldened conservatives who reject full integration into society and alienated ordinary folks by the increasingly xenophobic tone of Jewish communal culture. The new survey, to its credit, retracts that figure and offers the latest survey has spawned a panic created by the last one.
So why did the organization flawed figures once again? Some scholars who have studied the. survey believe the motivation then came partly out of a desire to shock straying Jews into greater observance. It' s too early to tell if that' s the case this time around. What is clear is the researchers did their job with little regard to how their data could be misconstrued. They used statistical models and question formats that, while internally sound, made the new survey incompatible with the previous one. For example, this time the researchers divided the population of 5.2 million into two groups--"highly involved" Jews and "people of Jewish background"- and posed most questions only to the first group. As a result, most findings about belief and observance refer only to a subgroup of American Jews, making comparisons to the past impossible.
We can' t afford to wait a decade before these figures are revised. The false population decline must be corrected before it further sours communal discourse. The United Jewish Communities owes it to itself and its public to step forward and state plainly what it knows to be true: American Jews are not disappearing.
According to the passage, which of the following statements is NOT true about the National Jewish Population Survey?
A.It found a decline of 300,000 Jews in ten years.
B.It was carded out by United Jewish Communities.
C.This is the first time United Jewish Communities has made mistakes in the population survey.
D.The reported decline is not reliable.
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Where Have All the Bees Gone?Scientists who study insects have a real mystery on their hands.A11acro...<br/>What is the mystery that researchers find hard to explain?()
A.Honeybees are flying all across the country.
B.25-40 percent of the honeybees in the US have died.
C.Honeybees are leaving their hives and do not return.
D.Honeybee hives are in disorder.
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The teacher asked me___.
A.what I studied English for B.what did I study English for C.what do I study English for D.what I have studied English for.
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It is a blow for the Ugly Bettys and Plain Janes ——research shows that good looks lead to better pay. A study of 4,000 young men and women found that beauty boosted pay checks more than intelligence.
It is unclear what is behind the phenomenon but it may be that beauty creates confidence. The self-confident may appear to be doing better than they are and will not hesitate about asking for a pay rise.
Researcher Jason Fletcher, of Yale University in the U.S., rated the attractiveness of the 4,000 men and women. Just over half were judged average, while 7 percent were felt to be very attractive and 8 percent were judged unattractive or very unattractive. The volunteers also sat an IQ test and reported their salary. It became clear that pay scales were far from fair. For instance, a 14- point increase on the IQ score was associated with a 3 to 6 percent increase in wage. But being of above-average looks increased pay by 5 to 10 percent .
For a plain person to be paid the same as a very attractive one , they would have to be 40 percent brighter, the journal Economics Letters reports.
Dr Fletcher said:“The results do show that people ’s looks have an impact on their wages and it can be very important.”
6.What is the “plainness penalty ”?
A.To be paid less for being ordinarily-looking
B.To be laughed at for being ordinarily-looking
C.To be fired for being ordinarily-looking
D.To be questioned for being ordinarily-looking
How many people were rated as very attractive in Jason Fletcher ’s study?A.About 280
B.About 4,000
C.About 2,000
D.About 320
What ’s the average annual salary of a good-looking person?A.£2,500
B.£25,000
C.£22,500
D.£27,500
Which of the following best summarizes the main idea of the passage ?A.IQ is less important than appearance
B.Confidence makes people prettier
C.Good looks earn an extra penny
D.How Plain Janes get a higher salary
Good-looking people are usually paid more probably because________ .A.they look smarter
B.they have higher degrees
C.they are better at pleasing others
D.they are more confident
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The researcher needs to inform the readers that the ___ of the study is confined to a preliminary stage, otherwise it will create a lot of ambiguity about the research goals()
A.extent
B.scope
C.scale
D.span