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题型:阅读理解 题类: 难易度:普通

人教版(2019)必修第一册Welcome Unit 同步练习

阅读理解

Plants may tell us when they're in trouble.Thirsty tomato and tobacco plants make clicking sounds,researchers have found.The sounds are ultrasonic (超声波的),meaning they are too high-pitched for human ears to hear.But when the sounds are transformed to lower pitches,they sound like popping bubbles (爆破的泡泡).Plants also make clicks when their stems (茎) are cut.

"It's not like the plants are screaming," says Lilach Hadany,an evolutionary biologist working at Tel Aviv University in Israel."Plants may not mean to make these noises.We've shown only that plants create informative sounds."

Hadany and her colleagues first heard the clicks when they set microphones next to plants on tables in a lab.The microphones caught some noises.But the researchers needed to make sure that the clicking was coming from the plants.So,the scientists placed plants inside soundproof boxes in the basement,far from the noise of the lab.There,microphones picked up ultrasonic pops from thirsty tomato plants.Though it was outside humans' hearing range,the clicking made by plants was about as loud as a normal conversation.

Cut tomato plants and dry or cut tobacco plants clicked,too.But plants that had enough water or hadn't been cut stayed mostly quiet.Wheat,corn and grapevines also made sounds when stressed out.

The researchers don't yet know why plants click.Bubbles forming and then popping inside plant tissues that transport water might make the noises.But however they happen,pops from crops could help farmers,the researchers suggest.Microphones,for example,could monitor fields or greenhouses to detect when plants need to be irrigated (灌溉).

Hadany wonders whether other plants and insects already tune into plant pops.Other studies have suggested that plants respond to sounds.And animals from pests (害虫),moths to mice can hear in the range of the ultrasonic clicks.Sounds made by plants could be heard from around five meters away.Hadany's team is now studying what the living things near the plants will do after hearing the sounds.

(1)、What is the main idea of the first paragraph?
A、Interpreting plant sounds isn't easy. B、Plants sound off when they're in trouble. C、It's interesting to hear the sounds of plants. D、Plants make sounds in a different way from humans.
(2)、Why did the scientists put plants inside soundproof boxes in the basement?
A、To enjoy the sounds made by the plants. B、To have a better conversation with the plants. C、To find out whether the plants did make sounds. D、To keep the plant sounds within their hearing range.
(3)、In what way can microphones be used to benefit plants?
A、Weed prevention. B、Pest control. C、Temperature monitoring. D、Timely irrigation.
(4)、What still remains unknown to Hadany's team?
A、Whether the sounds of plants can travel far. B、Whether animals can hear the sounds of plants. C、How the neighbors of plants respond to their sounds. D、How plants and animals communicate with each other.
举一反三
阅读理解。

    I was blind, but I was ashamed of it if it was known. I refused to use a white stick and hated asking for help. After all, I was a teenage girl, and I couldn't bear people to look at me and think I was not like them. I must have been a terrible danger on the roads. Coming across me wandering through the traffic, motorists probably would have to stop rapidly on their brakes. Apart from that, there were all sorts of disasters that used to occur on the way to and from work.

One evening, I got off the bus about halfway home where I had to change buses, and as usual I ran into something. "I'm awfully sorry," I said and stepped forward only to run into it again. When it happened a third time, I realized I had been apologizing to a lamppost. This was just one of the stupid things that constantly happened to me. So I carried on and found the bus stop, which was a request stop, where the bus wouldn't stop unless passengers wanted to get on or off. No one else was there and I had to guess if the bus had arrived.

    Generally in this situation, because I hated showing I was blind by asking for help, I tried to guess at the sound. Sometimes I would stop a big lorry and stand there feeling stupid as it drew away. In the end, I usually managed to swallow my pride and ask someone at the stop for help.

    But at this particular evening no one joined me at the stop; it seemed that everyone had suddenly decided not to travel by bus. Of course I heard plenty of buses pass, or I thought I did. But because I had given up stopping them for fear of making a fool of myself, I let them all go by. I stood there alone for half an hour without stopping one. Then I gave up. I decided to walk on to the next stop.

阅读理解。

    While watching the Olympics the other night, I came across an unbelievable sight. It was not a gold medal, or a world record broken, but a show of courage.

    The event was swimming and started with only three men on the blocks. For one reason or another, two of them false started, so they were disqualified. That left only one to complete. It would have been difficult enough, not having anyone to race against, even though the time on the clock is important.

    I watched the man dive off the block and knew right away that something was wrong. I'm not an expert swimmer, but I can tell a good dive from a poor one, and this was not exactly medal quality. When he resurfaced, it was evident that the man was not out for gold—his arms were waving in an attempt at freestyle. The crowd started to laugh. Clearly this man was not a medal competitor.

    I listened to the crowd begin to laugh at this poor man who was clearly having a hard time. Finally he made his turn to start back. It was pitiful. He made a few desperate strokes and you could tell he was worn out.

    But in those few awful strokes, the crowd had changed.

    No longer were they laughing, but beginning to cheer. Some even began to stand and shout “Come on, you can do it!” and he did.

    A clear minute past the average swimmer, this young man finally finished his race. The crowd went wild. You would have thought that he had won the gold, and should have. Even though he recorded one of the slowest times in Olympic history, this man gave more heart than any of the other competitors.

    Just a short year ago, he had never even swum, let alone race. His country had been invited to Sydney.

    In a competition where athletes remove their silver medals feeling they have somehow been cheated out of gold, or when they act so proudly in front of their competitors, it is nice to watch an underdog.

请认真阅读下列短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项。

    Our society is generally becoming one of giant enterprises directed by a bureaucratic management in which man becomes a small, well-oiled cog in the machinery. The oiling is done with higher wages, Nell-ventilated factories and piped music, and by psychologists and "human-relations" experts; yet all this oiling does not alter the fact that man has become powerless, that he is bored with it. In fact, the blue and the white-collar workers have become economic puppets who dance to the tune of automated machines and bureaucratic management.

    The worker and employee are anxious, not only because they might find themselves out of a job; they are anxious also because they are unable to acquire any real satisfaction of interesting life. They live and die without ever having confronted the fundamental realities of human existence as emotionally and intellectually independent and productive human beings.

    Those higher up on the social ladder are no less anxious. Their lives are no less empty than those of their subordinates. They are even more insecure in some respects. They are in a highly competitive race. To be promoted or to fall behind is not a matter of salary but even more a matter of self-respect. When they apply for their first job, they are tested for intelligence as well as for the right mixture of obedience and independence. From the moment on they are tested again and again—by the psychologists, for whom testing is a big business, and by their superiors, who judge their behavior, sociability, capacity to get along, etc. This constant need to prove that one is as good as or better than one's fellow competitor creates constant anxiety and stress, the very causes of unhappiness and illness.

    Am I suggesting that we should return to the preindustrial mode of production or to nineteenth-century "free enterprise" capitalism? Certainly not. Problems are never solved by returning to a stage which one has already outgrown. I suggest transforming our social system form a bureaucratically managed industrialism in which maximal production and consumption ends in a humanist industrialism in which man and full development of his potentialities – those of all love and of reason—are the aims of social arrangements. Production and consumption should serve only as means to this end, and should be prevented from ruling man.

阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

    BELJLNG—Eating at a Beijing restaurant is usually an adventure for foreigners, and particularly when they get the chance to order "chicken without sex life" or "red burned lion head".

    Sometimes excited but mostly confused, embarrassed or even terrified, many foreigners have long complained about mistranslations of Chinese dishes. And their complaints are often valid, but such an experience at Beijing's restaurants will apparently soon be history.

    Foreign visitors will no longer, hopefully, be confused by oddly worded restaurant menus in the capital if the government's plan to correctly translate 3, 000 Chinese dishes is a success and the translations are generally adopted.

    The municipal (市政) office of foreign affairs has published a book to recommend English translations of Chinese dishes, which aims to help restaurants avoid bizarre translations. "It provides the names of main dishes of famous Chinese cuisines in plain English," an official with the city's Foreign Affairs office said, "Restaurants are encouraged to use the proposed translations, but it will not be compulsory." It's the city's latest effort to bridge the culture gap for foreign travelers in China.

    "The book is a blessing to tourist guides like me. Having it, I don't have to rack my brains trying to explain Chinese dishes to foreign travelers," said Zheng Xiaodong, a 31-year-old employee with a Beijing-based travel agency.

    "I will buy the book as I major in English literature and I'd like to introduce Chinese cuisine culture to more foreign friends," said Han Yang, a postgraduate student at the University of International Business and Economics.

    It is not clear if the book will be introduced to other parts of China. But on Tuesday, this was the most discussed topic on weibo.com, China's most popular micro-blogging site.

阅读短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

    Happy, angry, amazed—these are some of the emotions we like to express these days when we're sending a message on our smart phones! That's why many of us now add little pictures to our texts to brighten up someone's mobile screen but we're also using them as a quick way of telling someone how we're feeling. Yes, emojis (表情符号) have become a popular tool for communication.

    The emoji was first invented in Japan in the late 1990s and the word "emoji" comes from the Japanese words for "picture" and "character". The number of different images has greatly increased since then and now we have a picture for nearly every mood or situation.

    Why are emojis widely used today? Professor Vyv Evans says, "Increasingly, what we're finding is that digital communication is replacing face-to-face talk in some ways. One of the reasons why emojis are so interesting is that they really do enable us to express our emotional selves much more effectively."

    Another advantage of emojis is that they are an international language—they don't use words but tell a message with pictures so they can be easily understood whatever your native language is.

    But as linguist (语言学家) Neil Cohn says, "To many, emojis are an exciting evolution (进化) of the way we communicate; but to others, they are linguistic Armageddon." It does show by using emojis, there is a lot more to our communication than words alone, but does this also mean that the traditional writing will die out one day?

阅读下列短文,从每题所给的四个选项(ABCD)中,选出最佳选项,并在答题卡上将该项涂黑。

As we all know, all work and no play makes Jack a dull boy. Now scientists have given us another warning: spending too much time on smart phones or computers makes you dull too.

"Many focus on the benefits of digital devices (设备) in education but ignore the costs," said Patricia Greenfield from the University of California, "losing the ability to understand the emotions of other people is one of the costs." Greenfield and her research team did an experiment. They worked with 105 children who spent about 4.5 hours in front of screens on a school day. The students were asked to describe the emotions towards the pictures of people who were happy, sad, angry or scared. Then, half of them attended a five-day nature and science camp. There they had no smart phones, TV, or computers. The other half stayed in school and spent the five days as usual. Five days later, all the children took the test again.

Students who had been to the camp got about 5 percent more answers correct than they had done before the camp. But the other group of students didn't show much improvement. The study is not perfect in some ways, said the researchers. But scientists say that the study is still a warning for us.

"Emotional skills develop in practice and the brain develops through real interaction." said Professor Taylor, a professor at the University of San Francisco.

Researchers talked to 2,000 parents of children aged 2-16 in the UK about what activities their children could do confidently. The results were surprising: Their children could use a tablet (平板电脑) (59%) and work a mobile phone (57%) more confidently than they could tie their shoe laces (鞋带) (53%)! So, spend more time away from mobile phones and computers if you want to be an understanding friend, and not a member of what the Daily Mail called "Generation Helpless".

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