组卷网 > 高中英语综合库 > 主题 > 人与社会 > 科普与现代技术 > 科普知识
题型:阅读理解-阅读单选 难度:0.65 引用次数:94 题号:14399983

When a leafy plant is under attack, it doesn't sit quietly. Back in 1983,two scientists,Jack Schultz and Ian Baldwin, reported that young maple trees (枫树) getting bitten by insects send out a particular smell that neighboring plants can get. These chemicals come from the injured parts of the plant and seem to be an alarm. What the plants send through the air is a mixture of chemicals known as volatile organic compounds,VOCs for short.

Scientists have found that all kinds of plants give out VOCs when being attacked. It's a plant's way of crying out. But is anyone listening? Obviously. Because we can watch the neighbors react.

Some plants give out smelly chemicals to keep insects away. But others do double duty. They give out smells designed to attract different insects who are natural enemies to the attackers. Once they arrive, the tables are turned. The attacker who was launching now becomes lunch.

In study after study, it appears that these chemical conversations help the neighbors. The damage is usually more serious on the first plant, but the neighbors, relatively speaking,stay safer because they heard the alarm and knew what to do.

Does this mean that plants talk-to-each-other? Scientists don't know. Maybe the first plant just made a cry of pain or was sending a message to its own branches, and so in effect,was talking to itself. Perhaps the neighbors just happened to "overhear” the cry. So information was exchanged,but it wasn’t a true, intentional back and forth.

Charles Darwin, over 150 years ago,imagined a world far busier, noisier and more intimate (亲密的) than the world we can see and hear. Our senses are weak. There's a whole lot going on.

1. What does a plant do when it is under attack?
A.It makes noises.B.It stands quietly.
C.It gets help from other plants.D.It sends out certain chemicals.
2. What will happen when the attackers' natural enemies arrive?
A.The attackers will get attacked
B.The insects will gather under the table.
C.The plants will get ready to fight back.
D.The attackers will give out smelly chemicals.
3. Scientists find from their studies that plants can_______
A.talk to one another on purpose
B.warn people of a coming danger
C.protect themselves against insects
D.help their neighbors who are under attack
4. What can we learn from the last paragraph?
A.The world is changing faster than ever.
B.People have stronger senses than before.
C.We don't fully understand the world.
D.People in Darwin's time were more imaginative
【知识点】 科普知识 说明文

相似题推荐

阅读理解-阅读单选(约340词) | 适中 (0.65)
名校

【推荐1】With the first quarter of 2021 crossed out of your calendar, have you stuck with your New Year’s resolutions? If yes, congratulations! Keep on doing it! However, it won’t surprise anyone if you are among the majority of people who fail to make any changes.

Procrastination, meaning delaying actions for one reason or another, may play an important part here. For example, when we read a book or write articles, the efficiency will decrease if we have a cell phone close by and we have to finish the plans next day.

Apart from procrastination, overconfidence may also be part of the problem. Israeli-American behaviorist Daniel Kahneman has identified something called “planning fallacy ”. This means we believe our own projects will proceed as planned even though similar tasks took more time.

Why do we keep making this mistake? In his book, Thinking, Fast and Slow, Kahneman says it’s because of “optimism bias” . He also says we underestimate the time we will need. In one famous example, planners originally estimated the Sydney Opera House would be completed by 1963. It was actually completed in 1973, an entire decade later. “Optimism and even overconfidence can generate false beliefs, leading us to overrate our abilities,” Kahneman wrote.

According to US writer Steve Pavlina, we could make a to-do list of upcoming tasks, and write down a rough estimate for how long we expect each task to take. Chinese news site Qdaily also noted, “People could use historical data in a proper manner. Previous experiences can help them see future trends.” Another way is to try and be more objective — take more of an “outsider” view. The ability to think about your experiences from a more detached point of view, rather than an immersed one, is important.

These methods aren’t enough to send a man to the moon. You also should take action right now.

1. What is the text?
A.A news report.B.A short story.C.A book review.D.An explanation article.
2. Why can’t the plan be finished in time according to the passage?
A.The task is too difficult.B.We don’t like to take action.
C.We lack confidence.D.We overrate our abilities.
3. What does paragraph 5 intend to tell us?
A.Ways to overcome optimism bias.B.Opinions on oncoming tasks.
C.Benefits of an outsider view.D.Effects of previous experiences.
4. What does the underlined sentence in the last paragraph mean?
A.These methods can make you more confident.
B.These methods are not as effective as imagined.
C.Using these methods can not guarantee success.
D.Landing on the moon needs other ways besides these methods.
2021-11-17更新 | 81次组卷
阅读理解-阅读单选(约260词) | 适中 (0.65)

【推荐2】Thomas Edison received a patent(专利) for his kinetoscope(电影放映机) on August31, 1887. It was a machine for viewing moving pictures. Edison had hoped to combine his no invention with the phonograph(留声机), which he had invented 10 years earlier. He thought that people would like to watch moving pictures that went along with the sound. He was not able to make them work together. The kinetoscope, however, was a popular attraction by itself. A person looked through small holes in a box-like machine and saw pictures in action. One of the first films made showed a man sneezing.

A problem with this invention was that only one person could view the moving pictures at a time. By 1891, Edison had invented a projector that showed the film on a screen. Many people could watch together.

In 1893, Edison built a motion-picture studio. He made over 300 silent films. Most of them were short. That was because the pictures flashed, or shook a lot. It was hard for people to watch more than 10 minutes at a time.

The first films were mostly of real events. They would show famous people walking somewhere, cars on a street, burning houses, and other news stories. Then comedies and short dramas were made.

Edison’s movie studio closed in 1918. By then other companies were also making films. Better cameras were made. Sound was added. Then color came along. Today, movies are among the most popular forms of entertainment.

1. What do we know about the first kinetoscope?
A.It was a machine to play pictures with sound.
B.It was invented 10 years earlier than phonograph.
C.Many people were able to see films together with it.
D.Only one person could see moving pictures with it at a time.
2. What does the underlined word “projector” in Paragraph 2 refer to?
A.A film player.
B.An electric lamp.
C.A programme.
D.A talking machine.
3. Why were most of the films very short at first?
A.People didn't like long films.
B.The film stories were really short.
C.The film pictures were not very steady.
D.People could only watch a short time at a time.
4. What does the text mainly tell us?
A.The trouble in making films.
B.The efforts of Edison in the development of films.
C.Why Edison invented the phonograph.
D.How Edison improved the kinetoscope.
2018-05-19更新 | 73次组卷
阅读理解-阅读单选(约360词) | 适中 (0.65)
名校

【推荐3】One of the most firmly established idea of manliness is that a real man doesn’t cry. Although he might cry a bit at a funeral, he is expected to quickly regain control. Crying openly is for girls. One study found that women cry significantly more than men do—five times as often, on average, and almost twice as long per period.

Historically, however, men usually cried, and no one saw it as shameful. For example, in the Middle Ages, knights cried only because they missed their girlfriends. In The Knight of the Cart, no less a hero than Lancelot weeps at a brief separation from Guinevere. There’s no mention of the men in these stories trying to hold back or hide their tears. They cry in a crowded hall with their heads held high. Nor do their companions make fun of this public crying; it’s universally regarded as an admirable expression of feeling.

So where did all the male tears go? The most obvious possibility is that this is the result of changes as we moved from an agricultural society to one that was urban and industrial. In the Middle Ages, most people spent their lives among those they had known since birth. If men cried, they did so with people who would sympathize. But from the 18th to 20th centuries, the population became increasingly urbanize, and people were living in the midst of thousands of strangers. Furthermore, changes in the economy required men to work together in factories and offices where expressions of feelings and even personal conversations were discouraged as time wasting.

Yet human beings weren’t designed to hide their feelings, and there’s reason to believe that restraining tears can be harmful to your well-being. Research from the 1980s has suggested a relationship between stress-related illnesses and not enough crying. Crying is also, somewhat related with happiness and wealth. Countries where people cry the most tend to be richer and more confident.

1. In history, people considered it ________ for men to cry in public.
A.manlyB.shameful
C.ridiculousD.acceptable
2. How does the author answer the question raised in paragraph 3?
A.By offering descriptions.B.By analyzing effects.
C.By making comparisons.D.By giving definitions.
3. Who is likely to be healthier according to the passage?
A.Tony who lives alone and seldom expresses himself.
B.Emily who is outgoing but sometimes sobs in public.
C.Arthur who is under great stress but never shed a tear.
D.Rebecca who sometimes cries but quickly regain control.
4. What is the best title for the text?
A.Men Don’t Cry. Why?B.Weeping Is for Women
C.Who Cry More? Men or Women?D.Weeping Makes a Weak Man
2020-01-18更新 | 91次组卷
共计 平均难度:一般