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题型:阅读理解 题类: 难易度:普通

广东省梅州市部分学校2023-2024学年高二下学期4月期中英语试题

阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。

With a brain the size of a pinhead, insects perform fantastic navigational (导航的)abilities. They avoid obstacles and move through small openings. How do they do this, with their limited brain power? Understanding the inner workings of an insect's brain can help us in our search towards energy-efficient computing, physicist Elisabetta Chicca of the University of Groningen demonstrates with her most recent result: A robot that acts like an insect.

In search of the neural(神经的) mechanism that drives insect behaviour, PhD student Thorben Schoepe developed a model of its neuronal activity and a small robot that uses this model to navigate. Schoepe's model is based on one main principle: always steer towards the area with the least apparent motion.

He had his robot drive through a long "corridor"—consisting of two walls with a random print on it—and the robot centred in the middle of the corridor, as insects tend to do. In other virtual environments, such as a space with obstacles or small openings, Schoepe's model also showed similar behaviour to insects.

"The model is so good," Chicca concludes, "that once you set it up, it will perform in all kinds of environments. That's the beauty of this result."

The fact that a robot can navigate in a realistic environment is not new. Rather, the model gives insight into how insects do the job, and how they manage to do things so efficiently.

Chicca explains, "Much of robotics is not concerned with efficiency. We humans tend to learn new tasks as we grow up and within robotics. This is reflected in the current trend of machine learning. But insects are able to fly immediately from birth. An efficient way of doing that is hardwired in their brains. In a similar way, you could make computers more efficient."

(1)、 Why does Chicca want to study how the insect brain works?
A、To make computers more efficient. B、To make use of insects' brain power. C、To understand the habit of insects. D、To reveal the inner part of insects' brain.
(2)、 What does the underlined word "steer" in paragraph 2 mean?
A、Stretch. B、Stare. C、Drive. D、Work.
(3)、How did Chicca feel at the performance of her robot?
A、Regretful. B、Shocked. C、Confused. D、Satisfied.
(4)、What are the last two paragraphs mainly about?
A、How to make a robot that acts like an insect. B、Why insects navigate more efficiently than robots. C、Why a robot can navigate in a realistic environment. D、How humans tend to learn new tasks as they grow up.
举一反三
阅读理解

    We are all called upon to make a speech at some point in life, but most of us don't do a very good job. This article gives some suggestions on how to give an effective speech.

    So, you have to give a speech and you are terrified. You get nervous, you forget what you want to say, you stumble over words, you talk too long, and you bore your audience. Later you think, “Thank Goodness, it's over. I'm just not good at public speaking. I hope I never have to do that again.”

    Cheep up! It doesn't have to be that bad. Here are some simple steps to take the pain out of speech making. Ask yourself the purpose of your speech. What is the occasion? Why are you speaking? Then, gather as many facts as you can on your subject. Spend plenty of your time doing your research. Then spend plenty of your time organizing your material so that your speech is clear and easy to follow. Use as many examples as possible, and use pictures, charts, and graphs if they help you make your points more clearly. Never forget your audience. Don't talk over their heads, and don't talk down to them. Treat your audience with respect. They will appreciate your thoughtfulness.

    Just remember: Be prepared. Know your subject, your audience, and the occasion. Be brief. Say what you have to say and then stop. And be yourself. Let your personality come through so that you make person-to-person contact with your audience.

    If you follow these simple steps, you will see that you don't have to be afraid of public speaking. In fact, you may find the experience so enjoyable that you volunteer to make more speeches! You're not convinced yet? Give it a try and see what happens.

根据短文内容,选择最佳答案,并将选定答案的字母标号填在题前括号内。

阅读理解

    Fort Scott High School English teacher Emily Rountree has been working this semester to raise money for Charity Water, a nonprofit organization that uses 100 percent public donations to help fund water projects in places without access to clean drinking water. Her goal was to motivate her students to use their writing in class to make a real-world difference. Twelve students got top grades for the project, and their articles will be published both in The Tribune and online. Here is one example:

    Did you know that there are many countries around the world that dont have access to safe drinking water? Just think: that could be you, or someone in your family. My name is Tanner Johnson, and I attend Fort Scott High School. In my English classes, we are trying to raise money for Charity Water. Charity Water is an organization that helps people get water in countries where there is no safe drinking water.

    In developing countries, 780 million people dont have access to clean drinking water. In Africa alone, people spend 40 billion hours every year just walking to get water. Women and children are the ones that mainly do the walking. They could be attacked or get hurt while they travel to get water. When they do get home, the water that they have brought is unsafe water from swamps, ponds, or rivers. If they had safe drinking water, they wouldnt have to worry about these problems, and they wouldnt be wasting hours of their day. Unsafe drinking water causes many different kinds of diseases that could lead to death.

    You could help save someones life, by donating $20 so we can help get them some safe drinking water. You can easily donate online at mycharitywater.org/fshsenglish, or you can send a check to Emily Rountree, payable to Fort Scott High School. If we dont help these people, then who will?

阅读理解

    In today's world of smart phones and laptops, most people have at least one time-telling thing with them. Since these digital products are so common, is time running out for the 500-year-old watch? According to some consumers, the answer is yes. New Jersey teenager Charlie Wollman says a watch is “an extra piece of equipment with no necessary function.” Many young adults think so and use their smart phones to tell time. It is said that fewer young people wear watches today than ten years ago. As a result, some people say that the watch industry is at a crossroads.

    However, watchmakers optimistically say that watches redeem(挽回)popularity when consumers reach their 20s and 30s. By then, they are willing to spend money on a quality watch that doesn't just keep good time. Fifty years ago, watchmakers took pride in their products' accuracy(精确性). But in recent years, the watch industry has changed itself into an accessory(配饰) business. And today, the image a watch conveys has become more important than the time it tells.

    "Complications" features that go beyond simple timekeeping — are an important part of a watch's image. Today's watches offer lots of features that meet almost any personality. These features include compasses, USB drivers, and even other functions that measure the effectiveness of golf swings!

    Creativity also plays a key role in designing today's watches. For example, Japanese watchmaker Tokyoflash makes watches that don't even look like watches. The company's popular Shinshoku model uses different color lights to tell time. It looks more like a fashionable bracelet than a watch.

    Whether a watch conveys fashion sense, creative talent or a love of sports, consumers want their watches to stand out. Nowadays, everyone has the same kind of gadget(小玩意) in their bags, so people want to make a statement with what's on their wrists. Will this interest in wrist fashion last? Only time will tell!

阅读理解

    When Casey Waletich, the director of safety and operations at the Hillsboro School District in Oregon, decided to start a campaign against bullying (欺凌)in his district, he knew he had to get the students on board.

   "We knew that this had to be a student-led effort. The days of having schools do things without the involvement of the students are over,"Mr. Waletich says.

    So he got a group of students together and asked them how they would like to do things. The resulting campaign," Rethink, Redefine, Where Do You Stand?" was launched in October 2014.

    The Hillsboro campaign is just one example of how schools nationwide are increasingly turning to students to develop-anti-bullying movements designed to not just discourage bulling, but also to encourage students to get involved.

    In 2013, some 20 percent of high school students reported experiencing bullying, according to federal data on Stop Bulling gov. The figure jumps to 28 percent when middle school students are included. Some 70 percent of young people say they have witnessed bullying.

    In response to these issues, anti-bullying campaigns in which students have a central role are being conducted across the country. From West Jordan, Utah(where students participated in a three-year character-building program to stop bullying), to Lisbon, Iowa, and Goodrich, Mich, school officials report that their students are taking ownership.

   "This year I've noticed our students are already thinking about what they need to do to make Sunset Ridge an accepting, safe environment." Said Julie Scherzinger, a guidance councilor at Sunset Ridge Middle School in West Jordan." Students come up to me and ask if anyone needs help"

   "There are many reasons why having students at the center is most

important." Says Ron Avi Astor, a professor in social development at the University of Southern California in Los Angeles." Bullying takes place when adults are absent. The kids see and hear more and can go and inform adults when they aren't there to respond immediately"

   "Teaching kids to step up when someone is being bullied teaches them how to be responsible citizens." Ron Avi Astor added.

阅读理解

    Give yourself a test. Which way is the wind blowing? How many kinds of wildflowers can be seen from your front door? If your awareness is as sharp as it could be, you'll have no trouble answering these questions.

    Most of us observed much more as children than we do as adults. A child's day is filled with fascination, newness and wonder. Curiosity gave us all a natural awareness. But distinctions that were sharp to us as children become unclear; we are numb(麻木的)to new stimulation(刺激), new ideas. Relearning the art of seeing the world around us is quite simple, although it takes practice and requires breaking some bad habits.

    The first step in awakening senses is to stop predicting what we are going to see and feel before it occurs. This blocks awareness. One chilly night when I was hiking in the Rocky Mountains with some students, I mentioned that we were going to cross a mountain stream. The students began complaining about how cold it would be. We reached the stream, and they unwillingly walked ahead. They were almost knee-deep when they realized it was a hot spring. Later they all admitted they'd felt cold water at first.

    Another block to awareness is the obsession(痴迷) many of us have with naming things. I saw bird watchers who spotted a bird, immediately looked it up in field guides, and said, a "ruby-crowned kinglet" and checked it off. They no longer paid attention to the bird and never learned what it was doing.

    The pressures of "time" and "destination" are further blocks to awareness. I encountered many hikers who were headed to a distant camp-ground with just enough time to get there before dark. It seldom occurred to them to wander a bit, to take a moment to see what's around them. I asked them what they'd seen. "Oh, a few birds," they said. They seemed bent on their destinations.

    Nature seems to unfold to people who watch and wait. Next time you take a walk, no matter where it is, take in all the sights, sounds and sensations. Wander in this frame of mind and you will open a new dimension to your life.

阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。

"Consumers complain that the modern tomato has little flavor. It's like a water bomb," said Sanwen Huang, who works at the Agricultural Genomics Institute at Shenzhen at the Chinese Academy of Agricultural Sciences. "Tomato farmers care about yield, and the genetic variants related to yield are not related to tasty tomato flavors."

How can farmers ditch this unpleasant thing and recover the rich, sweet flavor of the tomato? To find out, Huang and colleagues investigated which genes are related to tomatoes' taste. The scientists created a 100-person group that sampled 160 tomatoes based on sensory qualities. Based on the group's feedback, the researchers identified dozens of chemical compounds(化合物) that could be related to the tomato's taste. Using a statistical model that determined the concentration of various chemicals in the tomatoes, the scientists identified 33 most important flavor compounds. The researchers then measured the content of them in each of the tomatoes, and identified about 250 genetic loci(基因座) that controlled tomato flavor. This finding revealed the genetic basis of tomato flavor.

But the researchers also wanted to determine why store-bought tomatoes don't taste good. It turns out that modern tomato varieties are selected according to qualities such as big size because buyers prefer large fruit, and firmness because it makes tomatoes easier to ship. Meanwhile, the quality of flavor has been ignored, said the researchers.

Volatiles(挥发性物质), in particular, are essential for good flavor. The removal of specific volatiles from tomatoes results in significant reduction in people's liking. Moreover, refrigeration can change a tomato's volatile compounds.

"But there is hope for a future filled with tasty, new varieties of store-bought tomatoes, as our results provide a road map for improvement of flavor. By working together, geneticists, biochemists, farmers and customers can provide better-flavored tomatoes for our society." Huang said.

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