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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：2020-08-23

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 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2题

听音频，回答题 For many years， food vendors in American cities have offered selling food fr

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For many years， food vendors in American cities have offered selling food from trucks. Hungry people can find more than just hot dogs in these26. Now looking for new clothing is becoming as easy and satisfying as exploring the tasty 27 of food trucks. The new movement is called the fashion truck. Once a month， just after sunset， trucks fill an outdoor parking lot in Los Angeles， California. Some trucks sell all kinds of food products， from sweet ice cream to 28 seafood. Others have clothing or29for sale. These vehicles are known as fashion trucks.

Many people have never seen a fashion truck before. Janelle Shepard is exploring everything inside the J. D. Luxe fashion truck. The back of the truck is a30. Clothing hangs on one side. Jewelry and purses are on the other side. The store is31 and looks well organized. There is also a very small room for 32 clothes. Another reason to use a truck is that you can take your business to the customers. But she also admits there are difficulties. The biggest challenge is 33 the weather while another issue is keeping the truck in good condition. When a vehicle 34.， the repairs can take days. Business stops during the repair work， Fashion trucks are giving Internet businesses some competition and they attract 35. Experts hope that the city of San Francisco can create laws to rule the growing industry.

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第3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4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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第5题

听听力，回答题：A.Its the work combined musical talents with expertise．B.Its the s

听听力，回答题：

A.Its the work combined musical talents with expertise．

B.Its the song published in a collection．

C.Its the masterpiece enjoyed by kids and their parents．

D.Its the achievement made by the teacher．

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第6题

听听力，回答题：A.The picnic they will have on weekend．B.The forecast for the weat

听听力，回答题：

A.The picnic they will have on weekend．

B.The forecast for the weather on weekend．

C.The timetable of their plan on weekend．

D.The suggestion for arrangement on weekend．

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第7题

听听力，回答题：A.choose to he positive．B.Try our best to overcome．C.Make

听听力，回答题：

A.choose to he positive．

B.Try our best to overcome．

C.Make some decisive strategies．

D.Get our ambition inspired．

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第8题

听听力，回答题：A.Part of the dried, mushrooms have begun to decay．B.The dried mus

听听力，回答题：

A.Part of the dried, mushrooms have begun to decay．

B.The dried mushrooms didnt arrive on time．

C.Part of the dried mushrooms werent inspected．

D.The dried mushrooms are lost during the shipment．

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第9题

听听力，回答题：A.Common people could meet one another at a sport．B.People have no

听听力，回答题：

A.Common people could meet one another at a sport．

B.People have no intention to have a contest on sports．

C.International sporting contests lead to hatred．

D.Sport creates goodwill between the nations．

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第10题

听音频：{MP3:/imgcache/attached/media/20140521/20140521111902_5653.mp3} 根据所听到的内容，回

下列各题。

A.He made things worse.

B.He messed up the deal.

C.He wasnt trusted by the woman.

D.He had a terrible day.

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