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题型:阅读理解-阅读单选 难度:0.65 引用次数:130 题号:10103927

Having an older brother comes with plenty of benefits. However, a new study finds an interesting downside: children with older brothers take longer when it comes to developing language skills.

The study, conducted by a group of researchers in Paris, France, builds upon early research that having older brothers is associated with poor linguistic(语言的)development. Now, researchers say they have come to a more specific conclusion: only children with an older brother show these linguistic difficulties. One would assume(假设) that children with older brothers would grow up around more conversation on a daily basis, thus speeding up their language development. But researchers say such children actually take longer than their older brothers to begin developing these skills. Researchers studied more than 1,000 children from birth to the age of five-and-a-half years old. Each child’s language skills were tested at ages 2, 3, and 5.5, using tests specially designed to measure many aspects of language development such as vocabulary and syntax(句法). What the research team discovered was significant: children with an older brother had, on average, a two-month delay in their language development compared to studied children with an older sister. As far as explaining this phenomenon, researchers have given two assumptions. The first is that older sisters tend to talk more often than older brothers, which would make up for parents being less present than they were for their first child. The second assumption is that older sisters usually compete with their brothers and sisters less than older brothers for their parents’ attention.

So far, the study’s authors say they can’t say for certain why children with older brothers have a harder time developing language skills. In the future they’d like to investigate it further.

1. What does the word “downside” mean in the first paragraph?
A.slide.B.advantage.
C.upside down.D.disadvantage.
2. What can be learned from the passage?
A.Children with older brothers will speak earlier.
B.No one knows exactly the reason why children with brothers speak later.
C.Children with an older sister had a two-month delay in speaking.
D.Researchers studied over 1,000 children of all ages.
3. What’s the weakness for the children with older brothers?
A.The parents will never care about them any more.
B.The older brothers will always fight with them.
C.The development speed of their linguistic skills will be put off.
D.They won’t enjoy life-long close relationships with the older brothers.
4. What’s the best title of the passage?
A.Young brothers usually speak earlier?
B.Having older brothers always benefits you?
C.Parents love older brothers more?
D.Sisters often compete with brothers?

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【推荐1】You try to keep your eyes wide open while watching a basketball match or a wonderful firework show in case you might miss something exciting in just the blink of an eye. But in fact, humans blink about 15 times per minute on average. Have you ever missed anything because you blinked? Probably not. Why is that?

According to a new study published in the journal Current Biology in September, our brain has the ability to skip the temporary darkness when we blink. It can keep visual information for a short period of time and then put it together to form an image without interruption.

In order to understand how this works, a group of scientists at the German Primate Center and the University Medical Center Gottingen in Germany conducted an experiment. In the study, the participants were asked to look at patterns on a screen whose direction could be interpreted in different ways, such as horizontally(水平地) or vertically(垂直地). When one pattern was about to disappear and the next one was about to come, the participants had to indicate the direction that the next pattern would appear.

The researchers found that when the directions of two patterns didn’t match, the area in our brain which is responsible for visual memory was activated. This same area showed less activity when two patterns were in the same direction.

“The medial prefrontal cortex(前额叶皮层) adjusts current visual information with previously obtained information, and thus enables us to perceive the world with more stability, even when we briefly close our eyes to blink, ” Caspar Schwiedrzik explained in Science Daily. He is the first author of the study and also a scientist at the German Primate Center.

1. We don’t miss anything when blinking because our brain can ________.
A.deal with the missing imageB.remember all that we see
C.imagine what our eyes missD.put our pieces of memory together
2. What does the underlined word “it” in Paragraph 2 refer to?
A.Our brain.B.Visual information.
C.Current Biology.D.The temporary darkness.
3. What do we know about the experiment?
A.The two patterns appear at the same time.
B.Visual memory can be more activated by similarity.
C.Participants can interpret patterns differently.
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4. What would be the best title for this passage?
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【推荐2】Canaries (small yellow songbirds) are more sensitive to carbon monoxide (CO) than people are. Thus they were routinely taken into mines as men went about their work of mining for coal. CO could quickly poison many miners before they even knew what was happening. If a Canary stopped singing, this was an indicator of rising CO levels. Now ecologists think they’ve found a “canary” that could predict possible disaster for tropical (热带的) ecosystems — the cricket (a small brown jumping insect).

Crickets are tiny, present in large numbers and, most importantly, noisy. The chirps (唧唧叫声) of individual species are identifiably different. Researchers had previously wondered if ecosystems might be monitored by listening to how the sounds of their crickets change over time.

Amandine Gasc and her colleagues studied cricket populations on Grande Terre Island in New Caledonia, where multiple ecosystems often exist very near to each other. They collected crickets at 12 sampling sites. Four were healthy forest sites, four were shrubland (灌木地) areas, of the sort that is often created when people cut down forests, and four were shrubland areas that were turning into forests again. They listened for insects in square zones and ran ten 30-minute collection sessions (five in the day and five at night) at each site.

Dr. Gasc described how each ecosystem had, in effect, a distinct “cricket fingerprint”. Species richness varied considerably among the different environments. Of the 20 cricket species found in the healthy forest, 12 were unique to that habitat alone, 2 of the 15 species found in transitioning forests were unique to this habitat and 3 of the 7 shrubland species were unique to shrubland.

Just by looking at the crickets found in a given location, the team found that it was possible to determine whether they were looking at shrubland, forest or shrubland that was changing into the forest. There was no need to examine the other surrounding plants or animals.

What’s more, Dr. Gasc’s team found each habitat contained cricket species that generated their identifiable chirps. This suggests that setting up audio recorders in forests that pick up cricket calls will be an easy, cheap and accurate way to detect the early stages of change in tropical ecosystems.

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B.How crickets are distributed in tropical areas
C.Crickets: an early indicator of tropical ecosystem health
D.Why cricket chirps are collected on Grande Terre Island
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【推荐3】Most of us already know exercise can do wonders for our physical and emotional health, and reduce the risk of getting a number of diseases. But new research shows that exercising holds even more heart health benefits for people who suffer from anxiety or depression.

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Emery stresses how being physically active is important, even if you don’t reach the target of 150 minutes’ exercise of medium intensity level each week. He says taking the stairs, walking an extra bit from the car, or developing a community to help support your physical fitness needs is a great start.

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D.Physical and psychological states are independent of each other.
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A.Physical activities take on a variety of forms.
B.Physical exercise has little impact on cardiovascular events.
C.Exercise benefits heart health more for anxious or depressed people.
D.Cardiovascular events are closely related to anxiety or depression.
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