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听音频，回答题 There is an effect that not only have we all witnessed， but have26. Haven"t

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There is an effect that not only have we all witnessed， but have26. Haven"t we all been on an elevator and noticed that just about everyone stops talking when they get on？ Why do we do that？ You can be having a 27 pleasant conversation with someone， and as soon as you get on an elevator， you just feel like you"d better shut up.

Then， as soon as the doors open， everyone28conversation. Primatologists， or people who study primate （灵长类动物） behavior， have a term for this. It"s called the "elevator effect，" though it doesn"t 29 only on elevators. It happens whenever a group of primates， like humans， is 30 a situation where escape is 31 impossible. It"s thought to be a kind of safety32: as long as nobody talks， nobody is going to risk getting in a fight when there"s no way to spread out. The elevator effect keeps a lid on potential problems before they start.

Even though they rarely if ever ride elevators， chimpanzees demonstrate the elevator effect as well. When chimps are temporarily crowded together into small areas， they will 33 their vocal communication， that is， nobody speaks， and avoid eye 34. The amount of scratching the chimps do， however， goes up. Since scratching is a sign of stress in chimps， we can imagine what they are feeling. It"s just like what we feel in a crowded elevator——everybody carefully35 the lighted numbers and no one saying a thing.

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发布时间：2019-10-31

更多“听音频，回答题 There is an effect that not only have we all witnessed， but have26. Haven"t”相关的问题

第1题

听音频：回答题材料题请点击右侧查看材料问题

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A.She got up late this morning.

B.She is in bad mood.

C.She iniureed，herself when getting up

D.She is offended by the man"s words.

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第2题

听音频，回答题Recently the online encyclopedia Wikipedia celebrated its 10th birthday. Many

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Recently the online encyclopedia Wikipedia celebrated its 10th birthday. Many media outlets（26）its growth， number ofarticles， range of topics and its writer gender gap.

A recent study discovered that barely 15 percent of Wikipedia（27）are women， with the lion"s share of the articles beingwritten， edited and（28）by men in their mid-20s. Online public contexts such as web forums and Wikipedia， especially if they（29）domains such as politics， technology， or knowledge， are still male-dominated. These domains are important， and womcn"srelatively lesser30in them is potentially a cause for concern~ But that doesn"t mean women don"t have a（31）on theWeb. A few years ago， we wondered whether there was a gender gap in terms of who was getting online.

The survey found a（32）higher number of American women online than men. And in the current social networking age，the ladies are still leading the pack. Other surveys and reports show more female（33）on sites like Twitter and Facebook. Sowhen it comes to gender and the lnternet today， the question isn"t whether more men or women are surfing the Net， but whetherthey"re surfing the Net differently. Men tend to be more（34）， and to tolerate contentious debate， more than women. Women，（35）， tend to be more polite and supportive， as well as less assertive.

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第3题

听音频，回答题Jazz captures the essence of America， for in jazz all of the American charact

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Jazz captures the essence of America， for in jazz all of the American characteristics come together. The solos are a（26）ofindividual brilliance that can"t take place without these group efforts of the rhythm section. Beyond that， jazz has a connection to theessence of America in a much more（27）way. It is an expression of the African roots of American culture and a musicalmedium that（28）the culture of the Africans whose culture came to（29）much of what is American.

Jazz brought together elements from Africa and Europe，（30）them into a new culture and an expression unique to theAmericans. Out of this fusion came an idea that Americans believe it"s central to their identity: tolerance. Americans（31）that cultural diversity is their strength. They learn every day that other cultures and peoples may make valuable contributions to their wayof life. Jazz music is the embodiment of these ideals， combining elements from African and European cultures into a（32）American music. Jazz reflects two contradictory facets of American life. On the one hand， it is a team effort， where every musicianis completely（33）what the group does together， listening to each of the other players and building on their contributions tocreate a musical whole. On the other hand， the band features a soloist who is an individual（34）， a genius like Charlie Parkerwho explores musical（35）whers no one has ever gone before. In the same sense， American life is also a combination ofteamwork and individualism and a combination of individual brilliance with the ability to work with others.

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第4题

听音频，回答题 Elephants have a complex social structure and they live in26societies. The b

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Elephants have a complex social structure and they live in26societies. The basic family unit is formed of small groups of adult females， who are 27 each other， and their young of both sexes. Now the females remain in their families for life， they"re highly social， but male elephants leave their families at about fourteen years of age. They travel alone or stay together in small，28 groups with other males，29 joining a family on a temporary basis. When males are ready to mate they wander widely， searching for 30 females. The family unit， on the other hand， often contains three generations， and it can remain stable for decades， or even centuries. Then each family 31 between one and five other families， probably consisting of their more distant relatives. Scientists call these groups of families "bond groups"， and bond groups belong，32， to even larger groups， called clans. And like other social animals they have to be able to communicate. But what baffled early33was their ability to communicate over long distances. So they set about researching this question. After years of observation and study， our understanding of elephant communication has increased considerably in recent years. However， even with the use of radio tracking collars， it"s technically difficult to 34 the functions of long-range communication. So although scientists are aware that elephants may know the whereabouts， and possibly the activities of other elephants that are several miles away，there may be a lot of subtle， long-range35which are still not evident.

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第5题

听音频，回答题There are more than 2600 four-year universities in the United States， accordi

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There are more than 2600 four-year universities in the United States， according to the National Center for Education Statistics.But even with that26of choice， large numbers of high school students are applying to the same group of prestigious colleges.Today， any（27）is important for those hoping to be accepted by a prestigious school. Yale University， a member of the（28）group of universities known as the Ivy League， set a record this year， by accepting fewer than 9% of those who applied. Part of the problem is that there are more college-age students in the United States than ever——the population is growing.（29）rates are also lower because students are applying to more elite schools——（30）in the hopes of getting into at least one.

Students can now apply online instead of（31）pages of documents by hand. A few years ago， each student applied to three tofive schools（32）. "Today that number is much higher，" says college freshman Brian Kalish， who now leads campus tours for students. "Most kids apply to around five to seven colleges， but some of my friends went as high as 18 different colleges." These daysmany students begin preparing as much as three years before admission tim picking courses， getting（33）school activities andstudying for admissions tests. Educators say students should relax. They say a good edtication is（34）at many schools in the United States， which is（35）to have the finest higher education system. And they say the most important thing for students is to find a school where they feel comfortable.

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第6题

听音频，回答题 Did you ever wonder what occurs inside your body when something funny happe

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Did you ever wonder what occurs inside your body when something funny happens？ What is this thing we have in our brains that makes us say "ha-ha" when someone26abanana？

One way to find out is to watch the brain laugh. That"s what Dartmouth neuroscientist William Kelley did. He and his team had a number of volunteers watch an27of Seinfeld while being monitored by an MRI， a machine that allows researchers to see which parts of the brain are active at any 28 time. They then matched the MRI data with the laugh track to see how the brain changes when it"s 29 something funny. There"s no one "funny center" in the brain——but the findings were pretty.

When subjects were looking at something funny， the two regions in their left hemispheres lit up. From 31 studies these regions are known to be associated with resolving unclear meanings. Is there something in "getting it" that"s 32 the process by which we work with unclear information until we suddenly see the pattern in it？

A couple seconds later two other brain regions became 33， called the insula（岛叶） and the amygdala（扁桃腺）. The insula is associated with 34， so it seems likely that this is the brain feeling good when it gets the joke——the "ha-ha" response. The amygdala is associated with memory formation. As the researchers35，while you may not be able to remember every plot detail in an episode of a soap opera， you can probably remember the jokes. Humor stays with us， forming a lasting memory.

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第7题

听音频：回答题Last year， researchers published new findings from the Women"s Health Initiat

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Last year， researchers published new findings from the Women"s Health Initiative， a long-term study of more than 160000midlife women. The data showed that multivitamin-takers are no（26）than those who don"t take the pills， at least when it comes to the big diseases——cancer， heart disease， and（27） "Even women with poor diets weren"t helped by taking amultivitamin，" says the study author Marian Neuhouser， PhD， in the cancer（28）program at the Fred Hutchinson CancerResearch Center， in Seattle. Vitamin（29）came into fashion in the early 1900s， when it was difficult or impossible for most people to get a wide variety of fresh fruits and vegetables. Back then， vitamin-deficiency diseases weren"t unheard-of: the bowed legs and（30）ribs caused by a severe shortage of vitamin D， or the skin problems and mental confusion caused by a lack of vitamin B， But these days， you"re（31）unlikely to be seriously deficient if you eat an average diet， if only because many packaged foods are vitamin-enriched. Sure， most of us could do with a couple more daily（32）of produce， but a multivitamin doesn"t do a good job at（33）those. "Multivitamins have maybe two dozen（34）but plans，s have hundreds of other useful compounds，"Neuhouser says. "If you just take a multivitamin， you"re missing lots of compounds that may be providing benefits. " There is onegroup that probably ought to keep taking a multivitamin: women of reproductive age. The supplement is insurance（35）pregnancy.

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第8题

听音频，回答题For years the advice has been clear: Eating five portions a day of fruit and

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For years the advice has been clear: Eating five portions a day of fruit and vegetables is the key to a healthy life. But five mayno longer be enough. A study has found that to get（26）defense against heart disease， you need to eat at least eight dailyservings of fresh food. The government"s five-a-day advice has its（27）in World Health Organization guidelines to include 14ounces of vegetables in a daily diet. But there have been doubts over whether eating more than this level of fruit and vegetablesmeant even greater health（28）. Now the new study suggests every extra portion provides added protection.（29）， those inthe highest category——eating eight or more a day——have a 22 percent lower chance of dying from heart disease than those who（30）three portions， the UK average. A "portion"（31）just under three ounces， equal to a small banana， a medium appleor a small carrot. The findings come from an ongoing European（32）diet and health， looking at 300000 people in eight countries. Dr. Francesca Crowe of Oxford University is working on the project. She said that although ischemic （缺血性的） heart disease.

（IHD.——the most common（33）——was less likely in those who ate lots of vegetables， it could be explained by the probably healthier lifestyles.（34）these things， the study specifically showed a reduced risk of dying from II-[D of around four percent for each（35）portion of fruit and vegetables eaten above the lowest category， which was those who ate two or fewer portions.

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第9题

听音频，回答题 Have you ever noticed that while it"s pretty easy to tell your dog is sick，

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Have you ever noticed that while it"s pretty easy to tell your dog is sick， it"s much harder to know how your cat or bird are feeling？ Welt， before you start asking your dog why it can"t be more 26 like animals half its size， it"s probably worth 27 each animal"s place in the food chain. You see， the lower down the food chain you are， the more important it is for you to hide any sign of illness. Obvious illness or pain28 as red flags for predators. You may as well wear a sign saying， "Easy meal， guys. Come and get me."

Now， even small dogs are 29 programmed to function like predators，which 30 considering they are close relatives of wolves. And birds——you can probably 31 why the only way you"d find out your bird is sick is when it dies.

The situation with cats，32 dogs and birds， is much more interesting. On the one hand， cats are predators， but on the other， they"re small enough to be prey.

So how can you tell if your smaller pets need 33 attention？ For one thing，trust your feelings. No one knows your pets like you do， so if you notice even very 34 changes in habits and behavior， you may want to have a vet look them over. For a cat， other signs of illness might be that it has stopped grooming， is losing weight，35more or less than usual， or missing the litter box.

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