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题型:阅读理解-阅读单选 难度:0.65 引用次数:38 题号:19516923

Do you sometimes ignore your mom while chatting with friends? If you’re a teen, that’s fairly common. And a new study may explain why so many adolescents tune out their moms’ voices.

Science has shown that young children’s brains are well adapted to their mothers’ voices. But as children grow into teenagers, everything is changing. The latest research shows that teenagers’ brains are now more adapted to the voices of strangers than their own mothers. This is what Daniel Abrams explains, who is a neuroscientist at Stanford University School of Medicine in California.

Abrams and his colleagues already knew that younger kids’ brains respond more strongly to their moms’ voices than to a stranger’s. “In adolescence, we show the exact opposite of that,” Abrams says. For teens, these brain regions respond more to unfamiliar voices than to their moms’. This shift in what voice arouses interest most seems to happen between ages 13 and 14. That’s when teenagers are in the midst of puberty (青春期), a roughly decade-long transition to adulthood.

These areas in the adolescents’ brains don’t stop responding to their moms, Abrams says. It’s just that unfamiliar voices become more rewarding and worthy of attention. Here’s why: As kids grow up, they expand their social connections way beyond their family. So their brains need to begin paying more attention to that broader world.

“As we mature, our survival depends less and less on maternal (母亲的) support,” says Leslie Seltzer, a biological anthropologist at the University of Wisconsin-Madison. She was part of the team that carried out that 2011 study. Instead, she says, “We rely more and more on our peers — friends and others closer to our own age.”

Abrams said that although teenagers and their parents sometimes feel frustrated with missing information, it doesn’t matter. “This is the way the brain connects, and there is good reason.”

1. What do the underlined words “tune out” in Paragraph 1 mean?
A.Show respect to.B.Cooperate with.C.Pay little attention to.D.Sing in tune with.
2. How do teenagers behave differently from their childhood?
A.They are familiar to their mothers’ voices.
B.They are more excited hearing their mothers’ voices.
C.They respond more strongly to strangers’ voices than to their mothers’.
D.They deliberately ignore their mothers out of a desire to be independent.
3. Why is there a change in teenagers’ response to their moms’ voices?
A.Their brains just stop responding to their moms.
B.Their moms’ voices bring them a strong sense of frustration.
C.Their moms’ voices are no longer rewarding and worthy of attention.
D.Their brains need to pay more attention to social connections outside their family.
4. What does Abrams think of the change in family relations?
A.Disturbing.B.Inspiring.C.Insignificant.D.Disappointing.

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【推荐1】Would you rather watch a new movie or an old favorite? Would you rather try a dish you have never had at a restaurant, or stick with something you know you will like? Researchers studying the “mere-exposure effect” have found that we often prefer the familiar over the novel.

In 1968, social psychologist Robert Zajonc published a landmark paper on the mere-exposure effect. His hypothesis was that simply being exposed to an object on a repeated basis was enough to make people like that thing.     1     He varied how often they read each word (up to 25 repetitions). Next, participants were asked to decide how positive or negative the meaning of each word was. Zajonc found that participants liked the words that they had said more often, and the words that had been read 25 times were rated the highest.

One place where the mere-exposure effect frequently occurs is in advertising.     2     Of course, there is a warning here: The mere-exposure effect does not happen to things we dislike in the first place.

Since Zajonc’s initial study, numerous researchers have investigated the mere-exposure effect. They have found that our liking for a variety of things (including pictures, sounds, foods and smells) can be increased with repeated exposure, suggesting that the mere-exposure effect is not limited to just one of our senses.

In the decades since Zajonc published his paper on the mere-exposure effect, researchers have also suggested several theories to explain why the effect happens. One of the leading theories is that mere exposure makes us feel less uncertain.     3     However, when we see the same thing over and over and nothing bad happens, we start to realize that there is nothing to be afraid of. Additionally, mere exposure increases what psychologists call “perceptual fluency.” The perspective is based on the idea that, when we have seen something before, it is easier for us to understand and interpret it, which puts us in a positive mood.

While psychologists are still debating what causes the mere-exposure effect, it seems that having been previously exposed to something can change how we feel about it.     4    

A.Researchers have found that the mere exposure effect occurs even if people do not consciously remember that they have seen the object before.
B.And it may explain why, at least sometimes, we tend to prefer things that are already familiar to us.
C.Just the mere exposure to the word was enough to make participants like it more.
D.According to this idea, we tend to be cautious around new things, since they could be dangerous to us.
E.The theory explains why seeing the same advertisement multiple times can make it seem more convincing to us.
F.To test this, Zajonc had participants read words in a foreign language out loud.
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【推荐2】Indoor Plants

As with any house guests, indoor plants require a certain amount of basic, regular attention if they are going to feel at home. The first consideration when purchasing plants is to make reasonably sure that they are suitable for the condition in which they are going to be housed.

A general rule for most plants being brought indoors for the first time is to ensure that they have reasonable temperature of not less than 60 degrees Fahrenheit, a position out of cold air, safe from pets and not exposed to strong sunlight.

Plants love company. When plants are growing together, they create an atmosphere of damp around themselves which is far more beneficial than hot dry conditions. A group of plants will also present a more pleasing picture and provide an opportunity for a creative arrangement. There is no secret to this. Just rely on your natural feeling for harmony.

Watering and feeding plants are probably the two areas of care that are the least well understood, but, again, if you follow a few simple rules, your plants should do well. Cold Slightly warm water is therefore the answer. It is usually better to pour water on to the soil on the surface of the pot rather than put the water into the pot holder at the bottom. Avoid giving small amount of water at regular intervals- it is much better to wet the soil right through the pot in one go and then to allow it to dry noticeably before giving it a further watering.

The majority of indoor plants will be in active growth from March until October, and during this time, the established ones will benefit from regular feeding. This may mean feeding with a weak liquid fertilizer (肥料) at each watering or at intervals of a week or ten days with fertilizer at a standard strength. It is important, however, to ensure that plants are not fed when growth is inactive, when the soil in the pot is dry, or too soon after the plants has been potted up.

1. In Paragraph 2, the author mainly tells us to___________.
A.but plants that help clean indoor air
B.create a new environment with plants
C.put plants on the sunny side of the room
D.make sure of suitable conditions for plants
2. What’s the benefit of plants growing together?
A.It provides owners good company.
B.It helps the air around them slightly wet.
C.It makes it convenient to look after them.
D.It allows owners to draw a pleasant picture.
3. While watering the plants, what should we remember to do?
A.Use water that is a little warm.
B.Pour the water into the pot holder.
C.Give small amount of water at one time.
D.Consider further watering in dry weather.
4. What is the best time to feed the plants?
A.When the soil is dry.
B.When their growth is active.
C.When the temperature is high.
D.When they have just been planted.
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【推荐3】Yawning (打哈欠)happens countless times in your lifetime. The act of yawning is commonplace.     1     Every function of your body has a purpose. from eating to breathing, but what about yawning? Despite it being a common bodily function, not many people can explain the phenomenon.

    2     Yawning is the involuntary opening of the mouth followed by deep inhalation and exhalation(吸气和呼气). While it's frequently assumed that we yawn when we're bored or tired, scientific research suggests that there's a lot more to it!

Some researchers assume that yawning is a response that keeps us focused and aware.

When you yawn, areas in blood vessels become stimulated, leading to increased blood flow in your head.     3     Additionally. it's also been shown to help regulate brain temperature and cool it down when it gets too warm! A study found that people yawn more often when they're hot than when they're cold. You might have even noticed that you yawn more often in the summer than the winter!

People often yawn in response to others'yawning.     4     The reason behind this relates to high empathy; people who yawned more often in response to yawning scored higher on standard empathy evaluations. This is why it makes sense that you yawn after a friend or family member does.

    5     Yawn duration is related to the cells of our brains. Therefore, the length of yawns can broadly indicate brain weight.

So the next time you yawn, pay extra attention and see what your yawns can tell you!

A.Yawning is a sign of sleepiness.
B.Let's dive into what yawning really is.
C.Deep breaths can cool the brain slightly.
D.This helps to promote attention and awareness.
E.Even the thought of yawning can make you yawn.
F.However, most of us can't explain why it happens.
G.The length of a yawn also has a scientific basis behind it.
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