Some plants get so hungry they eat flies, and even small frogs. What"s more amaz
题型：不详难度：来源：
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 (茎) 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.
小题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 |
小题2:From the passage, we can infer that ______.| A．meat-eating plants are found nowhere else except Antarctica | | B．all 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 |
小题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．and then they will die slowly |
小题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. |
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答案
小题1:C
小题2:C
小题3:B
小题4:C |
解析
试题分析：文章介绍了食肉植物是如何吃昆虫的，它们的生活习性，以及和绿色植物的差别是什么。
小题1:细节题：从第二段的句子：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可以捕捉吃一些昆虫。选C
小题2:推理题;从第三段的句子：He states although you might have read some science-fiction stories, no meat-eating plant does any danger to humans.可知科幻小说中食肉的植物对人有害。选C
小题3:推理题;从最后一段的句子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.可知食肉动物是通过吃昆虫获得氮，如果不能吃昆虫，就会生长缓慢。选B
小题4:推理题;从第五段的句子：What makes meat-eating plants different is their special leaves, which need insects for one reason: nitrogen (氮). 可以推断出The Venus" flytrap 吃苍蝇是为了得到营养。选C
点评：这篇阅读理解集中考查了推理题，要求考生仔细阅读全文，做好相应的标志，以提高阅读的效率和速度，做题时要审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。进行合理的推理判断。 |
举一反三
HIGHFIELD COMPREHENSIVE SCHOOL
SCHOOL REPORT
Form Teacher: G. Baker Pupil’s Name: Simon Watkins
Term: Summer 2012 Form: Ⅳ B
Subject
| Exam
| Class work
| Comments
| English
| 59
| 61
| Simon has reached a satisfactory standard but now needs to apply himself with more determination.
| Mathematics
| 77
| 85
| Sound work and progress throughout the year. Well done!
| History
| 46
| 53
| A disappointing exam result. He is unable to give attention to this subject for long.
| Chemistry
| 78
| 85
| His obvious ability in the subject was not fully reflected in his exam work, but I have high hopes for him nevertheless.
| Physics
| 86
| 94
| An excellent term’s performance. He goes from strength to strength. A born scientist, I feel.
| Biology
| 57
| 60
| This time next year he will be taking the “0” exam. He needs to concentrate on the work, not on class conversation.
| French
| 41
| 46
| Clearly he didn’t bother to revise. His general attitude is far too casual.
| Physical
Education
| /
| 31
| Weak. It’s time he exercised his body more and his voice less. He should try to work with a team.
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FORM TEACHER’S REMARKS HEADMASTER
Basically satisfactory work and progress I shall be keeping an eye on though he will now have realized, I hope, that his progress in his weaker in certain subject areas he needs to make subjects though his
speedy progress. success in the sciences is improvement.
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小题1:According to the comments of the Physical Education teacher, Simon_______.| A．is too talkative in the class | | B．likes to work with his classmates | | C．doesn’t exercise his body at the right time | | D．becomes weak because he doesn’t exercise at all |
小题2:Which of Simon’s subjects will attract the headmaster’s attention in future?| A．Biology and Maths. | B．History and French. | | C．English and Chemistry. | D．Physics and Physical Education. |
小题3:Which of the following statements best describes Simon?| A．He has made great progress in language classes. | | B．His potential has been fully reflected in science classes. | | C．His grade in maths makes him a born scientist. | | D．He needs to improve his attitude on certain subjects. |
小题4: Based on the school report, which of the following statements is true?| A．Simon didn’t bother his teacher to revise French. | | B．Basically, Simon did a good job in science. | | C．Simon is a determined learner in English. | | D．Simon is able to pay attention to history for long. |
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Life on earth depends on water, and there is no substitute for it. The current assumption is that our basic needs for water—whether for drinking, agriculture, industry or the raising of fish—will always have to be met. Given this premise (前提), there are two basic routes we can go; more equal access to water or better engineering solutions.
Look at the engineering solutions first. A lot of my research concentrates on what happens to wetlands when you build dams in river basins, particularly in Africa. The ecology of such areas is almost entirely driven by the seasonal changes of the river—the pulse of the water. And the fact is that if you build a dam, you generally spoil the downstream ecology. In the past, such problems have been hidden by a lack of information. But in the near future, governments will have no excuses for their ignorance.
The engineers’ ability to control water flows has created new kinds of unpredictability, too. Dams in Africa have meant fewer fish, less grazing and less floodplain (洪泛区) agriculture, none of which were expected. And there average economic life is assumed to be thirty years. Dams don’t exist forever, but what will replace them is not clear.
The challenge for the future is to find new means of controlling water. Although GM technology(转基因) will allow us to breed better dry-land crops, there is no market for companies to develop crops suitable for the micro-climates of the Sahel and elsewhere in Africa. Who is going to pay for research on locally appropriate crops in the Third World?
小题1:What’s the main idea of this passage?| A．The engineering solutions to water resource and their limitation. | | B．The challenge for the future. | | C．The basic means of controlling water. | | D．The challenge for developing crops. |
小题2:The author suggests that governments will have no excuse for their careless ignorance in the future because _____.| A．The ecological destruction will be known to the public by researchers | | B．The ecological destruction will no longer be a problem in the future | | C．The future is an information age | | D．Governments will face greater challenge in the future |
小题3:Which of the following statements is NOT true for meeting our basic needs for water?| A．Water resource should be used more reasonably. | | B．More dams should be built in river basins. | | C．More wetlands should be protected from destruction. | | D．More dry-land crops could be developed in Africa. |
小题4:The last sentence probably implies that _____.| A．No one will invest in developing locally appropriate crops in Africa | | B．Researchers have no interest in developing dry-land crops | | C．Research on locally appropriate crops in the Third World may be profitable | | D．There is less water resource in the Third World |
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For some students, especially those from poor families, taking a job is not a matter of choice, but necessity. They need to work to save for college, or even to supplement family income. Counselors should help students who have a real need to work improve time management skills and seek employment that helps their educational goals.
“College costs are high, and young adults also want the amenities (便利设施) that extra money brings,” according to John B. Boshoven, counselor for continuing education at Community High School in Michigan. However, he warns, “School is my students’ full-time job.”
Studies show that students who work are more confident and possess better time management skills than students who are not employed. In addition to offering a paycheck, some independence, and satisfaction, a part-time job can provide teenagers with both training and experience. Working teaches students about responsibility and can also reinforce (充实) what they are learning in school. “Colleges want to find candidates who demonstrate maturity, responsibility, independence, and initiative, and good workers certainly demonstrate those important character traits,” Boshoven says. “Employers can write excellent recommendation letters for the students who have worked for them.”
On the other hand, experts agree that students who work more than 15 to 20 hours per week often experience lessened school success, which can lead to dropping out entirely. Working long hours can also limit opportunities to build friendships and explore interests that enhance a teenager’s intellectual and emotional development.
The major point that students should keep in mind is the importance of balance. Dan Crabtree, college and career counselor at Wheaton Academy in Illinois, explains, “We want our students to establish a healthy balance in life and work to maintain it throughout their lives.” If working will interfere with completing school work, participating in extracurricular activities, spending time with family and friends, or getting enough rest, it may not be a wise decision.
小题1:What’s the purpose of the passage?| A．To show how students can find a part-time job. | | B．To discuss the issue of students’ part-time work. | | C．To stress the importance of students’ part-time work. | | D．To explain what is a part-time job. |
小题2:In Boshoven’s opinion, students _____.
a. should take their studies as the first priority
b. can benefit from part-time work
c. can form healthy habits in their lives
d. shouldn’t depend on their families financially小题3:According to the passage, we know that _____.| A．without counselors" help, few students can get employed | | B．teenagers show strong interest in part-time work | | C．experts encourage students do more part-time work | | D．too much part-time work can lead to bad academic performance |
小题4:What can be concluded from the passage?| A．Students should balance part-time work well with other things. | | B．Part-time work is important for most students at college. | | C．Experts’ advice is the key to finding a good part-time job. | | D．All in all, students had better not spend time on part-time work |
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Cats are very smart. They are one of the smartest animals. The brain of a cat is large. It is highly developed. This may be why cats have good memories. Cats remember kindness and cruelty. It is a good idea to treat a cat well. Cats can “speak” too. They meow for attention. Often they stand by a door. Then they meow. Then they look over their shoulders. They want to see if their owners are coming. Cats make other noises also. They purr(猫发出的咕噜声)when they are happy. They hiss when they are angry.
Cats have a lot of pride. They don’t usually do silly tricks. Almost all cats want to have their own way. They are mostly true to only one person. They don’t switch loyalty easily. Cats were free in the wild. They want to stay that way. They like to be their own masters. When a cat is left alone, it can go back to caring for itself. It can live in the wild again. This is different from dogs. Dogs will switch their loyalty. At one time dogs were loyal to the leaders of their packs. Now, they will transfer allegiance(忠诚)to their owner. They do not like to be alone.
With kindness, a cat can be trained. Cats can learn to do many things. Some cats can learn to open doors. Some can ring doorbells. Some can even turn on water tap. Then they take a drink. Cats are very smart. Before drinking, they put a paw in the water. They test whether the water is hot or cold.
小题1:What is the best title for this passage?| A．The Difference Between Dogs and Cats. | B．The Characteristics of Cats. | | C． Loyal Animals. | D． How to Keep Cats? |
小题2:It’s interesting to have cats around ourselves because ________.
A.they always switch their loyalty B. they like to do silly tricks
C. they will hiss when they are happy D they are smart and have good memories
小题3:The last paragraph mainly shows that ________.| A．cats can test whether the water is cold or not | | B．cats know how to turn on the water tap | | C．cats are smart | | D．cats know how to open a door |
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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（岩脉）, 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”．
小题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 |
小题2:Johns proved his ability as a salesman by_______．| A．going into roofing business | B．carrying asbestos from Italy | | C．sending a trained scientist | D．showing the use of asbestos gloves |
小题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． |
小题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 |
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