Some plants get so hungry they eat flies, and even small frogs. What's more amazing is that these plants occur naturally (in special environments) in every state. In fact, they're found on every continent except Antarctica.
You've probably seen a Venus' flytrap -- a small plant, which grows 6 to 8 inches tall in a container. At the end of its stalks (莖) are leaves that act like traps (陷阱). Inside each trap is a lining of tiny hairs. When an insect lands on them, the traps suddenly shut. Over the course of a week or so, the plant feeds on its catch.
The Venus' flytrap is just one of more than 500 species of meat-eating plants, says Barry Meyers-Rice, the editor of the International Carnivorous Plant Society's Newsletter. He states although you might have read some science-fiction stories, no meat-eating plant does any danger to humans.
Barry says a plant is meat-eating, only if it does all four of the following: "attract, kill, digest, and absorb" some form of insects. Meat-eating plants look and act like other green plants -- well, most of the time.
All green plants make sugar to produce food. What makes meat-eating plants different is their special leaves, which need insects for one reason: nitrogen (氮). Nitrogen is a nutrient that they can't obtain any other way. Why?
Almost all green plants on our planet get nitrogen from the soil. Meat-eating plants can't. They live in places where nutrients are hard to get from the soil because of its acidity. So they've come to rely on getting nitrogen from insects and small animals. In fact, nutrient-rich soft is poisonous to meat-eating plants. Never fertilize (施肥) them! But don't worry, either, if they never seem to catch any insects. They can survive, but they'll grow very slowly.
小題1:According to the passage, a Venus' flytrap ______.
A.is a small plant which grows in a container
B.is a kind of plant which gets hungry easily
C.can trap and feed on some form of insects
D.can only grow 6-8 inches tall
小題2:From the passage, we can infer that ______.
A.meat-eating plants are found nowhere else except Antarctica
B.a(chǎn)ll green plants get nitrogen from the soil
C.meat-eating plants endanger humans in science-fiction stories
D.the nutrient-poor soil is beneficial to meat-eating plants
小題3:Meat-eating plants grow very slowly, ______.
A.so you'd better fertilize them
B.probably because the supply of nitrogen is cut off
C.simply because they can't absorb nitrogen from the soil
D.a(chǎn)nd then they will die slowly
小題4:Which of the following is true?
A.Meat-eating plants look and act like other green plants.
B.It's hard to get nutrients in the soil when acidity is high.
C.The Venus' flytrap eats flies to get nutrient from them.
D.Green plants make sugar at night.

小題1:C
小題2:C
小題3:B
小題4:C

試題分析:文章介紹了食肉植物是如何吃昆蟲的,它們的生活習性,以及和綠色植物的差別是什么。
小題1:細節(jié)題:從第二段的句子:When an insect lands on them, the traps suddenly shut. Over the course of a week or so, the plant feeds on its catch.可知 Venus' flytrap可以捕捉吃一些昆蟲。選C
小題2:推理題;從第三段的句子:He states although you might have read some science-fiction stories, no meat-eating plant does any danger to humans.可知科幻小說中食肉的植物對人有害。選C
小題3:推理題;從最后一段的句子They live in places where nutrients are hard to get from the soil because of its acidity. So they've come to rely on getting nitrogen from insects and small animals.和if they never seem to catch any insects. They can survive, but they'll grow very slowly.可知食肉動物是通過吃昆蟲獲得氮,如果不能吃昆蟲,就會生長緩慢。選B
小題4:推理題;從第五段的句子:What makes meat-eating plants different is their special leaves, which need insects for one reason: nitrogen (氮). 可以推斷出The Venus' flytrap 吃蒼蠅是為了得到營養(yǎng)。選C
點評:這篇閱讀理解集中考查了推理題,要求考生仔細閱讀全文,做好相應(yīng)的標志,以提高閱讀的效率和速度,做題時要審清題干,發(fā)覺和把握試題中有效的提示性信息,確認命題的角度、閱讀范圍和答題方式。進行合理的推理判斷。
練習冊系列答案
相關(guān)習題

科目:高中英語 來源:不詳 題型:閱讀理解

To many web-building spiders, most of whom are nearly blind, the web is their essential window on the world: their means of communicating, capturing prey, meeting mates and protecting themselves. A web-building spider without its web is like a men cast away on an island of solid rock,totally out of touch and destined to starve to death. So important is the web to an orb-web spider's survival that the animal will continue to construct new webs daily even if it is being starved. For 16 days the starving spider builds completely normal webs. Then, as the animal gets scrawnier, it constructs a wider-meshed (網(wǎng)孔、網(wǎng)眼)web using fewer strands(線). Such webs would only trap larger prey, which is more economical from the perspective of a starving spider. The spider stores energy by recycling web protein. It simply eats its own web each evening and reuses it to produce new silk. In studies with radioactivity, labeled materials, it was found that 95 percent of web protein reappears in the next day web. Most of the energy needed for web-building is used in walking over the strands as they are laid down. Scientists are impressed by the adaptability of the spider's highly preprogrammed brain, which is larger for its size than the brain of any other invertebrate(無脊推動物). If web-building is interrupted, or if some of the existing strands are destroyed, the spider simply goes back to see where the web is left off and then finishes building a normal web. One spider will finish building the incomplete web of another.
小題1:Which of the following best expresses the main ideas of the passage?
A.Secrets of Spiders' Adaptability
B.Importance of Webs to Spiders
C.Secrets of the Spiders' Life
D.Spiders' Highly Preprogrammed Brain
小題2:According to the passage, which of the following statements is TRUE?
A.Most spiders will stop conducting webs when hungry.
B.One Web-building spider usually conducts one web.
C.Web-building spiders will probably die without their webs.
D.Web-building spiders have good eyesight.
小題3:The underlined word “scrawnier” in the second paragraph probably means ______. 
A.weaker but good-looking
B.fatter and stronger
C.nice and healthier
D.thinner and bony
小題4:A spider's ability to finish an incomplete web proves that ______.
A.it has a highly preprogrammed brain
B.it reuses its web protein to reproduce new silk
C.the web is everything for a spider
D.it is able to rebuild a destroyed web

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Here is an astonishing and signficant fact:Mental work alone can’t make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human could labor without reaching a stage of fatigue(疲勞). To the amazement of these scientists, they discovered thett blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day labourer, we could find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of Albert Einstein, it would show no fatigue toxing at the end of the day.
So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours f efforts as at the beginning. The brain is totally tireless. So what makes us tired.
Some scientists declare that most of our fatigue come from our mental and emotional(情感的) attitudes. One of England’s most outstanding scientists. J. A. Hadfield,says,“The greater part of the fatigue from which we suffer is of mental origin. In fact,fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares,“One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”
What kinds of emotions make sitting workers tired?Joy?Satifaction?No!A feeling of being bored,anger,anxiety,tenseness,worry,a feeling of nt being appreciated---those are emotions that tire sitting workers.Hard work by itself seldom causes fatigue.We get tired because our emotions produce nervousness in the body.
小題1:What surprised the scientists a few years ago?
A.Fatigue toxinscould hardly be found in a labour’s blood.
B.Albert Eistein didn’t feel worn out after a day’s work.
C.The brain could wrk for many hours without fatigue.
D.A mental worker’s blood was filled with fatigue toxins.
小題2:According to the authour,which of the following can make sitting worker tired?
A.Challenge mental work.
B.Unpleasant emotions.
C.Endless tasks.
D.Physical labor.
小題3:What’s the authour’s attitude towards the scientists’ ideas?
A.He agrees with them.
B.He doubts them
C.He argues against them.
D.He hesitates to accept them.
小題4:We can infer from the passage that in order to stay energic, sitting workers need to ______.
A.have some good blood
B.enjoy their work
C.exercise regularly
D.discover fatigue toxin

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

In a world with limited land, water and other natural resources, the harm from the traditional business model is on the rise. Actually, the past decade has seen more and more forests disappearing and the globe becoming increasingly warm. People now realize that this unhealthy situation must be changed, and that we must be able to develop in sustainable(可持續(xù)的)ways. That means growth with low carbon or development of sustainable products. In other words, we should keep the earth healthy while using its supply of natural resources.
Today, sustainable development is a proper trend in many countries. According to a recent study, the global market for low-carbon energy will become three times bigger over the next decade. China, for example, has set its mind on leading that market, hoping to seize chances in the new round of the global energy revolution. It is now trying hard to make full use of wind and solar energy, and is spending a huge amount of money making electric cars and high-speed trains. In addition, we are also seeing great growth in the global markets for sustainable products such as palm oil, which is produced without cutting down valuable rainforest. In recent years the markets for sustainable products have grown by more than 50%.
Governments can fully develop the potential of these new markets. First, they can set high targets for reducing carbon emissions(排放)and targets for saving and reusing energy. Besides, stronger arrangement of public resources like forests can also help to speed up the development. Finally, governments can avoid the huge expenses that are taking us in the wrong direction, and redirecting some of those expenses can accelerate the change from traditional model to a sustainable one.
The major challenge of this century is to find ways to meet the needs of growing population within the limits of this single planet. That is no small task, but it offers abundant new chances for sustainable product industries.
小題1:The traditional business model is harmful because of all the following EXCEPT that _________.
A.it consumes natural resources
B.it makes the world warmer
C.it brings severe damage to forests
D.it makes growth hard to continue
小題2: What can we infer from Paragraph 2?
A.China lacks wind and solar energy.
B.China is the leader of the low-carbon market.
C.Palm oil is made at the cost of valuable forests.
D.High-speed trains are a low-carbon development.
小題3:To fully develop the low-carbon markets, governments can ________.
A.cut public expenses B.encourage energy conservation
C.develop public resourcesD.forbid carbon emission
小題4:What is the main purpose of the passage?
A.To advocate sustainable development.B.To compare two business models.
C.To predict a change of the global market.D.To introduce a new business model.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Although man has known asbestos (石棉) for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H.W.Johns, owner of a New York City Supply Shop for roofers, was responsible for the opening of that first mine.
Mr.Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands.How astonished the customers were to discover that he was not burned at all.You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport them from Italy to the United States, Mr.Johns sent out a young scientist to seek a source nearer home. This young man found great vein(巖脈), in the province of Quebec in Canada.
Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen.When it is mined, the asbestos is heavy, just as you would expect a mineral to be.When it is separated, a strange thing happens: the rock breaks down into fine, soft, soapy fibres.
Scientists do not know why the rock can be separated easily into threads, but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”.
小題1:Which title best expresses the main idea of this passage?
A.Asbestos mined in Canada B.Fireproof matter
C.A “wonder” mineral D.A new roofing material
小題2:Johns proved his ability as a salesman by_______.
A.going into roofing businessB.carrying asbestos from Italy
C.sending a trained scientistD.showing the use of asbestos gloves
小題3:Which is the most important characteristic of asbestos that the author wants to show us?
A.It is like thread.B.It feels soapy.
C.It burns easily.D.It is unusually heavy.
小題4:The author’s main purpose in writing this passage was to _______.
A.show the need for more scientists
B.compare asbestos with other minerals
C.increase the sales of asbestos
D.present facts about asbestos

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

(The Guardian):              More UK universities should be profiting from ideas
  A repeated criticism of the UK's university sector is its noticeable weakness in translating new knowledge into new products and services.
  Recently, the UK National Stem Cell Network warned the UK could lose its place among the world leaders in stem cell research unless adequate funding and legislation could be assured, despite an annual £40m spent by the Department of Health on all kinds of research.
  However, we do have to challenge the unthinking complaint that the sector does not do enough in taking ideas to market. The most recent comparative data on the performance of universities and research institutions in Australia, Canada, USA and UK shows that, from a relatively weak starting position, the UK now leads on many indicators of commercialization activity.
  When viewed at the national level, the policy interventions (interference) of the past decade have helped transformed the performances of UK universities. Evidence suggests the UK's position is much stronger than in the recent past and is still showing improvement. But national data masks the very large variation in the performance of individual universities. The evidence shows that a large number of universities have fallen off the back of the pack, a few perform strongly and the rest chase the leaders.
  This type of uneven distribution is not strange to the UK and is mirrored across other economies. In the UK, research is concentrated: less than 25% of universities are receiving 75% of the research funding. These same universities are also the institutions producing the greatest share of PhD graduates, science citations, patents and license income. The effect of policies generating long-term resource concentration has also created a distinctive set of universities which are research-led and commercially active. It seems clear that the concentration of research and commercialization work creates differences between universities.
  The core objective for universities which are research-led must be to maximize the impact of their research efforts. Their purpose is not to generate funds to add to the bottom line of the university or to substitute other income streams. Rather, these universities should be generating the widest range of social, economic and environmental benefits. In return for the scale of investment, they should share their expertise (expert knowledge or skill) in order to build greater confidence in the sector.
  Part of the economic recovery of the UK will be driven by the next generation of research commercialization spilling out of our universities. On the evidence presented in my report, there are three dozen universities in the UK which are actively engaged in advanced research training and commercialization work.
  If there was a greater coordination(協(xié)調(diào))of technology transfer offices within regions and a simultaneous (happening at the same time) investment in the scale and functions of our graduate schools, universities could, and should, play a key role in positioning the UK for the next growth cycle.
小題1:What does the author think of UK universities in terms of commercialization?
A.They have lost their leading position in many ways.
B.They still have a place among the world leaders.
C.They do not regard it as their responsibility.
D.They fail to change knowledge into money.
小題2:What does the author say about the national data on UK universities’ performance in commercialization?
A.It masks the fatal weaknesses of government policy.
B.It indicates their ineffective use of government resources.
C.It does not rank UK universities in a scientific way.
D.It does not reflect the differences among universities.
小題3:We can infer from Paragraph 5 that “policy interventions (in Paragraph 4)” refers to _____.
A.concentration of resources in a limited number of universities
B.compulsory cooperation between universities and industries
C.government aid to non-research-oriented universities
D.fair distribution of funding for universities and research institutions
小題4:What dose the author suggest research-led universities do?
A.Fully use their research to benefit all sectors of society.
B.Generously share their facilities with those short of funds.
C.Advertise their research to win international recognition.
D.Spread their influence among top research institutions.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

About 97% of the world's water is salty and is found in our oceans and seas. But, as we can't drink seawater, how can it be important?
Every part of our seas and oceans contains an amazing number of animals and fish that live at different ocean depths. Most of the different species of animals and fish depend on simple plants for their food. These simple plants called algae (海藻) drift near the surface of the ocean and use sunlight to turn carbon dioxide and water into food and oxygen. In fact, algae produce over half of the oxygen people breathe. How important seawater is!
Each plant or animal in our seas and oceans is an important link in a food chain. The algae are eaten in large amounts by microscopic animals, which are in turn consumed by larger animals. These food chains are delicately balanced.
The bad news about the food chains in the oceans is that they are under threat because of man. People once thought that the oceans were so big that it didn't matter if we dumped rubbish into them or caught huge quantities of fish and whales for food. But we now know this is not true and fish stocks in the oceans have started to drop.
Thankfully, the world is taking steps to protect the future of our oceans by introducing international agreements to protect marine habitats. Most countries have introduced fishing restrictions to protect fish stocks in the oceans and new techniques are being pioneered to cope with pollution. Finally, the importance of protecting oceans is being made known to more people. This is just the beginning of a long process to protect the oceans for our future. We depend on the oceans for fish which are an important part of the human diet. How important seawater is!
小題1:People used to think that the rubbish thrown into the sea ________.
A.wouldn't harm the fish in the sea
B.would change the balance of the food chain
C.would be broken down in the sea
D.wouldn't do much harm to the sea
小題2:From the passage, we learn that ________. 
A.most fish and sea animals live at the surface of the seas
B.it is very difficult to break the balance of a food chain
C.excessive fishing has caused the decrease in fish stock
D.it won't be long before the problems concerning oceans will be solved
小題3:Which of the following is NOT a way being used to protect oceans?
A.The use of international agreements.
B.Forbidding fishing to protect fish stocks.
C.The use of new techniques.
D.Raising people's awareness of the need to protect oceans.
小題4:What would be the BEST title of the passage?
A. The importance of seawater.
B. Life in the oceans.
C. How to protect food chains.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Is language, like food, a basic human need? Judging from the extreme experiment of Frederick in the 13th century, it may be. Hoping to discover what language a child would speak if he heard no mother tongue he told the nurses to keep silent.
All the babies died before the first year. But clearly there was more than language deprivation (剝奪,喪失). What was missing was good mothering. Without good mothering, in the first year of life especially, the ability to survive is seriously affected.
Today no such extreme deprivation exists as that ordered by Frederick. Nevertheless, some children are still backward in speaking. Most often the reason for this is that the mother is insensitive to signals of the baby, whose brain is programmed, to mop up language rapidly. There are critical times, it seems when children learn more rapidly. If these sensitive periods are neglected, the ideal time for acquiring skills passes and they might never be learned so easily again.
Linguists suggest that speech milestones are reached in a fixed order and at a constant age, but there are cases where speech has started late in a child who eventually turns out to be of high IQ.
Recent evidence suggests that a baby is born with the ability to speak. What is special about man’s brain, compared with that of the monkey, is the complex system which enables a child to connect the sight and feel of, say, a teddy bear with the sound pattern “teddy bear”.
But speech has to be developed, and this depends on interaction between the mother and the child, where the mother recognizes the signals in the child’s babbling, clinging, grasping, crying, smiling, and responds to them. Insensitivity of the mother to these signals reduces the interaction because the child gets discouraged and sends out only the obvious signals. Sensitivity to the child’s nonverbal (非語言的) signals is basic to the growth and development of language.
小題1:Frederick’s experiment was extreme because _________.
A.he wanted to prove children are born with ability to speak
B.he wanted his nurses to say another language
C.he was unkind to the nurses
D.he ignored the importance of mothering to the babies
小題2:The reason that some children are backward in speaking is most likely that _________.
A.they do not listen carefully to their mothers
B.their mothers do not respond to their attempts to speak
C.their brain has to absorb too much language at once
D.their mothers are not intelligent enough to help them
小題3:In paragraph 3, by “critical times” the author means _________.
A.difficult periods in the child’s life
B.moments when the child becomes critical towards its mother
C.important stages in the child’s development
D.times when mothers often neglect their children
小題4:If a child starts to speak later than others, he will _________ in future.
A.have a high IQB.be less intelligent
C.not necessarily be backwardD.be insensitive to verbal signals
小題5:If the mother seldom responds to her child’s signals, _________.
A.the child will be able to speak properly
B.the child will continue to give out signals
C.the child will invent a language of own
D.the child will make little effort to speak

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

When we say older people shrink, we don’t mean they become tiny enough to fit in your pocket! We just mean that it’s common for older people to become a little shorter over time. This kind of shrinking can’t be reversed, although people can slow or stop this process. But why does shrinking happen at all?
Because of gravity (that force that keeps your feet on the ground) , cushions between the bones in the spine (脊骨), get compressed (壓縮), which makes a person lose a little height and become shorter.
Another reason why some older people shrink is because of osteoporosis (骨質(zhì)疏松). Osteoporosis occurs when bone is broken down and not enough new bone material is made. Over time, bone is said to be lost because it’s not being replaced. Bones become smaller and weaker and can easily break if someone with osteoporosis is injured.
Older people — especially women, who generally have smaller and lighter bones to begin with — are more likely to develop osteoporosis. As years go by, a person with osteoporosis can get small breaks in bones that are called compression fractures. These breaks cause collapse of the spine and over time the person with osteoporosis can become hunched over (駝背).
Did you know that every day you shrink a little, too? You aren’t as tall at the end of the day as you are at the beginning. That’s because as the day goes on, water in the disks of the spine gets compressed due to gravity, making you just a tiny bit shorter. Don’t worry, though. Once you get a good night’s rest, your body recovers, and the next morning, you’re standing tall again!
Smoking and drinking alcohol can make this problem worse. Want to do something right now to build strong bones? I believe what I say will help you.
小題1:Which of the following statements is true?
A.For shrinking, people can do nothing about it.
B.If someone is injured, he will become shorter.
C.Women have smaller and lighter bones than men.
D.We aren’t as tall at the end of the day as we are at the beginning.
小題2:What should we do if we don’t want to shrink faster?
A.We should try to reduce gravity.
B.We should be careful not to be hurt by others.
C.We should sleep as long as possible.
D.We should keep away from smoking and drinking alcohol.
小題3:What is the topic of the passage?
A.How can we stop shrinking?
B.Why do we shrink?
C.Some tips on how to keep tall.
D.How to live a healthy life.
小題4:About osteoporosis we know that _______.
A.gravity is one of the causes of osteoporosis
B.once our bone is broken down, osteoporosis will occur
C.women are more likely to develop osteoporosis
D.if we develop osteoporosis, we are more likely to be shorter
小題5:What will the author talk about in the paragraph to be followed?
A.Tell us how to grow taller.
B.Tell us how to become healthier.
C.Tell us how to avoid being shrinking.
D.Tell us what to do to have strong bones.

查看答案和解析>>

同步練習冊答案