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题型:阅读理解-阅读单选 难度:0.4 引用次数:146 题号:10319896

Ultrasound(超声)is used widely in medical imaging, but in recent years scientists have started developing it for another use: stimulating nerves to treat disease. In two new studies in mice, researchers focused the sound waves on nerves in the spleen(脾)that communicate with the immune system, reducing symptoms. If the approach proves safe and effective in people, it could serve as a treatment for diseases such as arthritis(关节炎).

In one study, led by scientists at the Feistein Institute and GE Research, mice receiving a few minutes of ultrasound treatment to the spleen nerve had a diminished symptoms to an injected(注射)poison. In another study, researchers at the University of Minnesota and their colleagues reduces symptoms of arthritis in mice by stimulating their spleen nerves for 20 minutes every day for a week. “Zeroing in on the spleen may provide a more precise approach than focusing on the vagus nerve(交感神经), which connects with the immune system via a second nerve that stimulates the spleen.” says Hubert Lin, lead author of the latter study. “When we’re targeting the spleen we have less of an effect all over the body.”

“Little is known about how repeated ultrasound affects the spleen or whether it has other harmful effects,” says neuroscientist Denise Bellinger of Loma Linda University, who was not involved in either study. An ongoing clinical trial aims to assess the treatment’s safety in humans with arthritis. A bigger unknown is how ultrasound activates in general. Scientists are now exploring the use of ultrasound on other parts of the nervous system, including the brain. “We know how to control nerves with electricity, and we’ve been doing it for more than 100 years,” neuroscientist Kevin Tracey says, “But the idea of controlling nerve signals with ultrasound is a brand-new field.”

1. What do scientists expect of the new application of ultrasound?
A.It'll be applied in medical imaging
B.It'll be used to activate nerves to treat disease.
C.It’ll be applied in spleen transplantation.
D.It'll be employed to rebuild immune system.
2. What does the underlined word “diminished" in paragraph 2 mean?
A.Complicated.B.Worsened.
C.Decreased.D.Associated.
3. What is the concern of Denise Bellinger?
A.Side effect.B.Time length.
C.The procedure.D.The cost.
4. What is most likely the next step of the study?
A.Assessing the treatment' s safety on humans.
B.Activating nerves in general with ultrasound.
C.Exploring the use of ultrasound on the brain.
D.Controlling nerve signals with ultrasound.

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阅读理解-阅读单选(约440词) | 较难 (0.4)
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【推荐1】The Rise of Voice Technology

Voice technology has come a long way. Just a few years ago, it would have been unusable. But now, those who follow the technology know that it has got considerably better.

Writing with your voice raises several interesting questions. How difficult is it actually? Human speech involves a lot more starting and stopping with errors and the need for repairing broken sentences than you may think. Even gifted speakers make mistakes. To turn the spoken word into reasonable writing requires lots of planning. You’ll need some kinds of notes or other organisers to make it work.

Another question turning speech into writing raises is the style. How would writing make the change that people speak their writing rather than type? Chances are that it would come up with many more short sentences and more concrete language, which is good. It would probably also rely on prepared phrases a lot more often, which is not available when you are speaking quickly.

To confirm this, a column was not written, but dictated (听写). It was composed from brief notes written down for structure only, and it was edited for length, with all of the original errors kept in. Here were the results. The first was that the literal accuracy was extremely high. There weren’t many cases where the software had heard one word incorrectly and written down another. But the other result was that the readability of this column was rather bad. Obviously, the blame is not with the technology at all, which turns out to be rather good. Speaking into writing relies on a better human brain than the one we currently possess. Writing is hard. There’s a reason it can’t be done at the speed of speech, in real time.

To clarify the matter, this time paragraph breaks were added after the whole writing. Punctuations (标点) had to be spoken aloud, and after a full stop, the first word in the new sentence was capitalized automatically. Some minor punctuation marks were added to make it clearer. To improve accuracy, people “trained” the software beforehand, reading a prewritten passage aloud. Actually it turns out to be more effective. All of these ensure the satisfactory completion of turning speech into writing.

Language is the most important tool for human interaction, and voice is one beautiful part of language. With the maturity of modern technology, it has given birth to a great change in the human-computer voice interaction.

1. According to the passage, which helps to turn speech into writing in terms of style?
A.There is careful planning in advance.
B.Errors and broken sentences are avoided.
C.People type words as fast as they say them.
D.The writing contains more prepared phrases.
2. To achieve better results, the author mentions some changes for ______.
A.processing errors in a column.
B.adding minor punctuation marks.
C.increasing the number of brief notes.
D.integrating short paragraphs in writing.
3. The author suggests that ______.
A.human brains are responsible for poor dictated writing.
B.writing with voice promises to improve the quality of writing.
C.writing is an unnatural act that can hardly be learned and improved.
D.technology has a long way to go in the human-computer voice interaction.
4. What is the passage mainly about?
A.Why people fully intend to turn speech into writing.
B.What role voice technology plays in improving readability.
C.Where the human-computer voice interaction is at an advantage.
D.How voice technology enables the change from speech into writing.
2021-05-08更新 | 712次组卷
阅读理解-七选五(约260词) | 较难 (0.4)
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文章大意:这是一篇说明文。文章主要阐述了人们之所以喜欢模仿富人和名人的日常行为,是因为有一种叫做“迷信学习”的强大心理过程。如果由此产生的习惯对个人有一定的好处,那就可以继续使用。

【推荐2】We love to mimic the routines of the rich and famous, but they may be no more insightful than random behaviors. Beethoven, for example, counted exactly 60 coffee beans for each cup, which he used to power his composing.

Why do successful people follow unusually specific habits? And why are we so keen to read about them and mimic them in our own lives?

The answer lies in a powerful psychological process called “superstitious learning”.     1    While it is mostly correct, it sometimes mistakes coincidence for causality (因果关系) ― leading us to attribute success to something arbitrary (主观的) as the color of our notebook, rather than our own talent or hard work.

That is not to say the resulting habits are completely lacking in benefits.     2    

If superstitious behaviors arise as a by-product of our ability to form associations, then you would expect more superstitious people to perform better on implicit learning ― the brain’s ability to non-consciously pick up patterns ― and this was exactly what Elena Daprati, a neuroscientist at the University of Rome Tor Vergata found. “Superstitious individuals generally pick up on the cue and use it,” she says.

    3    Creative tasks are especially common with uncertainty ― which may explain why thinkers like Beethoven adopted specific behaviors to get their thoughts flowing.

Often, the rituals that we acquire take very little effort.     4    Although the initial association with success may have been illusory (幻想的) the positive mindset that it produces really does improve our performance the next time so we do it again and again.

    5     If the action costs nothing and helps you to feel a bit more in control of your day, it’s perfectly rational to continue.

A.The brain is constantly looking for associations between two events.
B.Daprati suggests this may even be the reason that we persist in these behaviors.
C.Given these findings, we need not be embarrassed by the little rituals that pepper our days.
D.In some cases, when the association influences high-level decision-making, superstitious learning may be costly.
E.The scientific study of superstitious learning began in the late 1940s, with an influential paper by an American psychologist.
F.In everyday life, this associative learning might lead us to settle on a “lucky” pen that seems to deliver particularly good grades in exams.
G.By giving us a sense of self-determination, the adoption of rituals can help us to overcome anxiety, and may even bring about a noticeable boost in performance.
2022-12-11更新 | 755次组卷
阅读理解-阅读单选(约330词) | 较难 (0.4)
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【推荐3】Choosing to forget something might take more mental effort than trying to remember it, researchers at The University of Texas discovered. Their findings suggest that in order to forget an unwanted experience, more attention should be focused on it.

“Decades of research has shown that we have the ability to forget something out of our own free will, but how our brains do that is still being questioned. Once we can figure out how memories are weakened and come up with ways to control this, we can design treatment to help people rid themselves of unwanted memories.” said Jarrod Lewis-Peacock, the study's senior author.

Memories are energetic constructions of the brain that regularly get updated, adjusted and reorganized through experience. The brain is constantly remembering and forgetting information—and much of this happens automatically during sleep.

Their findings not only confirmed that humans have the ability to control what they forget, but that successful intentional forgetting requires more activity than what is required to remember.

“A proper level of brain activity is important to this forgetting mechanism (机制). Too strong, it will strengthen the memory; too weak, you wont change it,” said Tracy Wang, lead author of the study. “Importantly, it's the intention to forget that increases the activation of the memory, and when this activation (激活) hits the “proper level” sweet spot, that's when it leads to later forgetting of that experience”.

The researchers also found that participants were more likely to forget scenes than faces. “We're learning how these mechanisms in our brain respond to different types of information, and it will take a lot of further research before we understand how to use our ability to forget,” said Lewis-Peacock. “Hopefully we can find out how we process and get rid of those really strong memories, which can have a powerful effect on our health and well-being.”

1. What remains a puzzle to researchers?
A.How our memories can be strengthened.
B.How our brains voluntarily forget something.
C.What effect unwanted memories have on our brains.
D.Whether our brains can voluntarily forget something.
2. Which of the following words can best describe memories?
A.Casual.B.Unpredictable.
C.Active.D.Permanent.
3. It can be learned from the text that ______.
A.it requires less attention to forget than to remember
B.the more active the brain is, the faster it forgets
C.humans can't keep memories under control
D.humans forget faces less easily than scenes
4. What can be a suitable title for the text?
A.What It Takes to Forget an Unwanted Experience
B.Strong Memories Have a Great Influence on Health
C.Forgetting Uses More Brain Power than Remembering.
D.How to Train Our Brains to Voluntarily Forget Something
2020-06-21更新 | 140次组卷
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