Some plants get so hungry that they eat flies, spiders, and even small frogs. What’s more amazing is that these plants occur naturally (in special environment) in every state. In fact, they’re found on every continent except Antarctica.
You’ve probably seen a Venus’ flytrap. It’s often sold in museum gift stores, department stores, and even supermarkets. A small plant, it grows 6 to 8 inches tall in a container. At the end of its stalks(茎) are specially modified leaves that act like traps. Inside each trap is a lining of tiny trigger(触发) hairs. When an insect lands on them, the trap 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(食肉的) Plant Society’s Newsletter. Note: Despite any science-fiction stories you might have read, no meat-eating plant does any danger to humans.
Dr. Meyers-Rice says a plant is meat-eating, only if it does all four of the following: “attract, kill, digest, and absorb” some forms of insects, including flies, butterflies, and moths. Meat-eating plants look and act like other green plants ---well, most of the time.
All green plants make sugar through a process called photosynthesis(光合作用). Plants use the sugar to make food. What makes “meat-eating” plants different is their bug-catching leaves. They 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 or almost impossible 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 soil is poisonous to “meat-eating” plants. Never fertilize them! But don’t worry, either, if they never seem to catch any insects. They can survive, but they’ll grow very slowly.
1.According to the passage, carnivorous plants ________.
A.only grow in wild field B.are rare to see
C.are as common as flies D.cannot grow on Antarctica
2.We can conclude from the third paragraph that ________.
A.carnivorous plants are dangerous
B.carnivorous plants are fictional
C.carnivorous plants occasionally eat books
D.carnivorous plants are harmless to humans
3.In the eyes of the author, which of the following statements is TRUE?
A.Carnivorous plants cannot grow in acid soil.
B.Carnivorous plants can grow in nutrient-poor soil.
C.Carnivorous plants will die if they cannot catch any insects.
D.Carnivorous plants can get nitrogen from nutrient-rich soil.
高一英语阅读理解中等难度题
Some plants get so hungry that they eat flies, spiders, and even small frogs. What’s more amazing is that these plants occur naturally (in special environment) in every state. In fact, they’re found on every continent except Antarctica.
You’ve probably seen a Venus’ flytrap. It’s often sold in museum gift stores, department stores, and even supermarkets. A small plant, it grows 6 to 8 inches tall in a container. At the end of its stalks(茎) are specially modified leaves that act like traps. Inside each trap is a lining of tiny trigger(触发) hairs. When an insect lands on them, the trap 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(食肉的) Plant Society’s Newsletter. Note: Despite any science-fiction stories you might have read, no meat-eating plant does any danger to humans.
Dr. Meyers-Rice says a plant is meat-eating, only if it does all four of the following: “attract, kill, digest, and absorb” some forms of insects, including flies, butterflies, and moths. Meat-eating plants look and act like other green plants ---well, most of the time.
All green plants make sugar through a process called photosynthesis(光合作用). Plants use the sugar to make food. What makes “meat-eating” plants different is their bug-catching leaves. They 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 or almost impossible 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 soil is poisonous to “meat-eating” plants. Never fertilize them! But don’t worry, either, if they never seem to catch any insects. They can survive, but they’ll grow very slowly.
1.According to the passage, carnivorous plants ________.
A.only grow in wild field B.are rare to see
C.are as common as flies D.cannot grow on Antarctica
2.We can conclude from the third paragraph that ________.
A.carnivorous plants are dangerous
B.carnivorous plants are fictional
C.carnivorous plants occasionally eat books
D.carnivorous plants are harmless to humans
3.In the eyes of the author, which of the following statements is TRUE?
A.Carnivorous plants cannot grow in acid soil.
B.Carnivorous plants can grow in nutrient-poor soil.
C.Carnivorous plants will die if they cannot catch any insects.
D.Carnivorous plants can get nitrogen from nutrient-rich soil.
高一英语阅读理解中等难度题查看答案及解析
Today some people get ______ because they eat too much fat and sugar and don’t take enough ______.
A.fatter and fatter; exercise | B.fatter and fatter; exercises |
C.thinner and thinner; exercise | D.thinner and thinner; exercises |
高一英语单项填空简单题查看答案及解析
Some plants are so difficult to grow that they can only ______ in a perfectly clean environment.
A. communicate B. exchange
C. survive D. afford
高一英语单项填空简单题查看答案及解析
Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need. It has been shown that rats will, when given a choice over a period of time, prefer water with vitamins(维生素) to water without vitamins even though there is no difference in taste or smell between the two water bottles. When a fragrant flavor was added to the vitamins-enriched water, the rats did seem to develop it and kept drinking it, even after the vitamins were switched to the clear water. In time, however, they broke the habit and went back to where the necessary vitamins were.
In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria feeding arrangement, with a wide selection of baby food before them. They were given whatever food they pointed to or appeared interested in. We are told that at first they showed some unusual eating patterns, but over a period of time they managed to select well-balanced diet.
So, in choosing food, rats and babies do seem to know and act on what’s best for them. Apparently, there is a kind of “body wisdom”, which humans soon lose. Most of us do not eat as wisely as we could. Many of our food preferences are culturally determined and influenced by long-formed habits. Some people eat foxes, dogs and blackbirds, while we eat cows and pigs. So what people eat and how much they eat seems to be greatly influenced by what is going on around them.
1.In the experiment on rats, a fragrant flavor was added to the rats’ drinking water to _________.
A. test whether rats know which drink is good for them
B. encourage rats to drink vitamins-enriched water
C. find out rats’ preference in flavor
D. demonstrate the vitamins are tasteless
2.According to the passage, adults eating habits differ from those of babies because _________.
A. adults know better than babies what kind of food are good for their health
B. adults’ eating habits are closely related to the social and cultural customs
C. adults have more choices of food than babies in eating patterns
D. adults usually cannot resist the temptation of various delicious foods
3.As far as their eating habits are concerned, babies and rats are similar in that ________.
A. both prefer flavored food and drink
B. both have the same eating patterns
C. both have the wisdom to choose a balanced diet
D. both develop a taste for the same kinds of flavors
高一英语阅读理解中等难度题查看答案及解析
Like you and your pet dog, plants are living things: they eat, drink, and grow. Unlike you and your dog, they can't run away, use fists or teeth, or hide under the covers when they're threatened. But they can fight back.
Why would a plant need to fight back? To avoid being eaten, of course! Plants have several ways of protecting themselves. A plant can grow in a hidden or hard-to-get-to place. Think of plants you've seen growing on steep, rocky cliff (悬崖). Or, a plant could make only some parts of itself attractive to hungry insects and animals. For instance, if a plant produced really tasty leaves, herbivores (creatures that eat only plants) might eat the leaves instead of the seeds, which the plant needs for making more plants. Some plants have sharp or slippery (滑的) parts that discourage insects and other animals from getting too close, like the thorns(刺) on a rosebush.
But the most interesting way that plants fight back is by using chemicals. Plants take minerals from the soil and combine them into chemicals that do a lot of work. For example, plants produce chlorophyll(叶绿素), which helps convert sunshine and water into the sugars that plants eat.
They also produce chemicals to help protect themselves. One kind of tobacco plant releases a chemical into the air whenever small bugs begin to eat it. The chemical signals large bugs, saying "Dinner's ready!" The big bugs come to eat the little ones and save the plant.
Most plants use chemicals in a more direct way against their enemies. In other words, plants make poison.
1.What does the underlined word "convert" mean?
A.Change B.Separate
C.Form D.Produce
2.What do we know from the passage?
A.Some plants hide under the covers when faced with threat.
B.A plant grows in a hard-to-get-to place to draw people's attention.
C.Some plants produce tasty leaves to protect their seeds.
D.Plants produce chemicals to meet the needs of big bugs.
3.What may be talked about following the last paragraph?
A.Different effects that different plant poisons cause on plant eaters.
B.Different kinds of plants in the world.
C.Why plants make poison?
D.How to protect plants?
4.What would be the best title for the passage?
A.Plant information. B.Plant enemies.
C.Plant poisons. D.Plant protection.
高一英语阅读理解中等难度题查看答案及解析
Why, you may wonder, should spiders be our friends? Because they destroy so many insects, and insects include some of the greatest enemies of the human race. Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals. We owe a lot to the birds and beasts who eat insects but all of them put together kill only a fraction of the number destroyed by spiders. Moreover, unlike some of the other insect eaters, spiders never do the least harm to us or our belongings.
Spiders are not insects, as many people think, nor even nearly related to them. One can tell the difference almost at a glance, for a spider always has eight legs and an insect never more than six.
How many spiders are engaged in this work on our behalf? One authority on spiders made a census of the spiders in a grass field in the south of England, and he estimated that there were more than 2,250,000 in one acre, that is something like 6,000,000 spiders of different kinds on a football pitch. Spiders are busy for at least half the year in killing insects. It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day. It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.
1.Spiders are our friends because they_______.
A.are beneficial insects
B.protect insect-eating animals
C.destroy insects without hurting us in any way
D.include some of the greatest enemies of the human race
2.The underlined word “devour” in the first paragraph probably means “________”.
A.protect B.eat up C.be beneficial to D.help
3.Birds and beasts_________.
A.eat as many insects as spiders
B.eat more insects than spiders
C.can’t compare with spiders as destroyers of insects
D.destroy a large fraction of insects than spiders
4.If spiders were insects, they would______.
A.have eight legs B.have six legs or less
C.be able to fly D.not destroy their own kind
高一英语阅读理解中等难度题查看答案及解析
Because plants cannot move or talk, most people believe that they have no feelings and that they cannot receive signals from outside. However, this may not be completely true.
People who studied plants have found out that plants carry a small electrical charge (电荷). It is possible to measure this charge with a small piece of equipment called “galvanometer”. The galvanometer is placed on a leaf of the plant, and it records any changes in the electrical field of the leaf. Humans have a similar field which can change when we are shocked or frightened.
A man called Backster used a galvanometer for his studies of plants and was very surprised at his results. He found that if he had two or more plants in a room and he began to destroy one of them -- perhaps by pulling off its leaves or by pulling it out of its pot-then the galvanometer on the leaves of the other plants showed a change in the electrical field. It seemed as if the plants were signaling a feeling of shock. This happened not only when Backster started to destroy plants, but also when he destroyed other living thing such as insects (昆虫).
Backster said that the plants also knew if someone had destroyed a living thing some distance away, because they signalled when a man who had just cut down a tree entered the room.
Another scientist, named Sauvin, achieved similar results to Backster’s. He kept galvanometers fixed on his plants all the time and checked regularly to see what the plants were doing. If he was out of the office, he telephoned to find out about the signals the plants were sending. In this way, he found that the plants were sending out signals at the exact times when he felt strong pleasure or pain. In fact, Sauvin could cause a change in the electrical field of his plants over a distance of a few miles simply by thinking about them.
1.Backster was surprised at the results of his studies because _____.
A. he destroyed an insect
B. he destroyed a plant by pulling off its leaves
C. he found that plants could express feelings of shock
D. he found that plants could move and speak after all
2.The plants sent out signals _____.
A. only when Backster Started to destroy plants
B. when Backster destroyed plants or other living things
C. only when he destroyed things such as insects
D. only when Backster placed the galvanometer on the leaves of the plants
3.The scientist called Sauvin _____.
A. did not agree with Backster’s ideas
B. did not get the same sort of results as Backster did
C. got different results from Backster’s
D. found out some of the same things that Backster did
4.Which of the following is true according to the passage?
A. Sauvin could make his plants send out signals some distance away.
B. A tree will signal when it has been cut down.
C. The electrical charge plants carry may shock or frighten us.
D. Plants have feelings because they can receive signals without moving.
高一英语阅读理解简单题查看答案及解析
People have been making and flying kites for about 2, 000 years. 1. Some historians believe that the ancient Chinese may have started kite flying 2, 000 years ago. It is still a popular hobby in China, Japan and South Korea and in other countries of the Far East where beautifully decorated kites appear in different colours. In China there is even a special Kite Day on which children and adults fly kites. In Japan, families fly fish kites on Children’s Day.
Kites are made in many different sizes, colours and shapes. 2. It flies because air flows over and under the kite’s wing. The pressure under the wing helps the kite lift into the air.
3. Early scientists sent kites up into the air to measure temperature at different heights. In 1752, Benjamin Franklin used a kite to prove that lightning was a form of electricity. He attached a metal key to the string of a kite. When lightning hit the kite, electricity passed down the string and Franklin got an electric shock. It was a very dangerous experiment that you shouldn’t copy.
Kites were also used to develop airplanes. The Wright Brothers experimented with kites before they flew the first airplane. 4. In World War I the Germans developed a large kite that could transport people to a submarine (underwater ship). Kites were also used to carry radio signals over long distances.
5. Kite festivals are organised in many cities in all parts of the world.
A. Today most people fly kites as a hobby.
B. Kites are usually made by paper or cloth.
C. Kites have also been used in experiments.
D. No one knows for sure who invented the kite.
E. The name comes from a graceful bird called kite.
F. A flat kite is the oldest and simplest type of kite.
G. In the past kites were used to take part in wars.
高一英语七选五中等难度题查看答案及解析
If cars had wings,they could fly and that just might happen, beginning in 2011.The company Terrafugia, based in Woburn, Massachusetts, says it plans to deliver its car-plane, the Transition, to customers by the end of 2012.
“It’s the next ‘wow’ vehicle,”said Terrafugia vice president Richard Gersh.“ Anybody can buy a Ferrari, but as we say, Ferraris don’t fly.”
The car plane has wings that unfold for flying—a process the company says takes one minute—and fold(折叠) back up for driving. A runway is still required to take off and land.
The Transition is being marketed more as a plane that drives than a car that flies, although it is both. The company has been working with FAA to meet aircraft regulations, and with the National Highway Traffic Safety Administration to meet vehicle safety regulations.
The company is aiming to sell the Transition to private pilots as a more convenient and cheaper way to fly. They say it saves you the trouble from trying to find another mode of transportation to get to and from airports: You drive the car to the airport and then you’re good to go. When you land, you fold up the wings and hit the road. There are no expensive parking fees because you don’t have to store it at an airport—you park it in the garage at home.
The car-plane is designed to fly primarily under 10,000 feet. It has a maximum takeoff weight of 1,430 pounds, including fuel and passengers. Terrafugia says the Transition reduces the potential for an accident by allowing pilots to drive under bad weather instead of flying into marginal(临界)conditions.
The Transition’s price tag: $194,000, But there may be additional charges for options like a radio, transponder or GPS. Another option is a full-plane parachute. “If you get into a very awful situation, it is the necessary safety option,” Gersh said.
So far, the company has more than 70 orders with deposits. “We’re working very closely with them, but there are still some remaining steps,” Brown said.
1.We can learn from the first paragraph that .
A. car- planes will be popular in 2012
B. people might drive a car-plane in 2012
C. both Transition and Ferrari can take off and land
D. Richard Gersh is the vice president of Massachusetts
2.lt takes the car-plane one minute to .
A. fold and unfold its wings
B. unfold wings for flying
C. land in the airport
D. meet flying safety regulations
3.According to the passage, which of the following is NOT true?
A.The car-plane needs a runway to take off and land.
B.To meet aircraft regulations, the company has been working with FAA.
C.The car-plane may fly as high as normal planes.
D.People can park the car-plane in the garage at their home.
4.The underlined word“it”in the last but one paragraph refers to .
A.the radio B.the transponder
C.the GPS D.the full-plane parachute
5.What’s the best title for the passage?
A. A more Convenient and Cheaper Way to Fly.
B.Which to Choose: A Ferraris or a Car Plane?
C. Cars With Wings May Be Just Around The Corner.
D.Cars With Wings Can Fly as Fast as Planes.
高一英语阅读理解中等难度题查看答案及解析
_______ they are nutritious is not a factor temping enough to get you eating more fruit and vegetables, here’s some news that may convince you -- they make you look good too.
A.That B.As whether C.Whether D.If that
高一英语单项填空困难题查看答案及解析