If you’ve spent any amount of time boating, fishing, or bird-watching at lakes and rivers, you have most likely seen fishes jumping out of the water. I have seen it many times. Certainly, fishes will exit water in desperate attempts to escape enemies. Dolphins take advantage of the behavior, forming a circle and catching the frightened fishes in midair. But just as we may run fast from fun or from fear, different emotions might motivate fishes to jump.
Mobula rays (蝠鲼) aren’t motivated by fear when they throw their impressive bodies — up to a seventeen-foot wingspan (the distance from the end of one wing to the end of the other) and a ton in weight — skyward in leap of up to ten feet. They do it in schools of hundreds. They usually land on their bellies, but sometimes they land on their backs. Some scientists think it might be a way of removing parasites (寄生虫). But I think that the rays are enjoying themselves.
In the clear waters of Florida’s Chassahowitzka National Wildlife Refuge, I watched several schools of fifty or more mullets(鲻鱼) moving in beautiful formation. Their well-built bodies were most evident when they leaped from the water. Most of the time I saw one or two leaps by a fish, but one made a series of seven. They usually land on their sides. Each jump was about a foot clear of the water and two to three feet in length.
Nobody knows for sure why the fish leaps. One idea is that they do it to take in oxygen. The idea is supported by the fact that mullets leap more when the water is lower in oxygen, but is challenged by the likelihood that jumping costs more energy than is gained by breathing air. It is hard to imagine they will feel any fresher when back in water.
Might these fishes also be leaping for fun? There is some new evidence. Gordon M. Burghardt recently published accounts of a dozen types of fishes leaping repeatedly, sometimes over floating objects — sticks, plants, sunning turtle — for no clear reason other than entertainment.
1.What can we say about the dolphins in Paragraph 1?
A.They have great escaping skills. B.They are easily frightened.
C.They are very clever. D.They love jumping.
2.What do the ray and the mullet have in common when jumping?
A.Both do it in groups. B.Both land on their bellies.
C.Both jump many feet out of water. D.Both make leaps one after the other.
3.What’s the author’s attitude towards the idea mentioned in Paragraph 4?
A.Anxious. B.Indifferent.
C.Approving. D.Questionable.
4.Why do fishes leap according to Gordon?
A.To remove parasites. B.To amuse themselves.
C.To take in more oxygen. D.To escape enemies.
高二英语阅读理解中等难度题
If you’ve spent any amount of time boating, fishing, or bird-watching at lakes and rivers, you have most likely seen fishes jumping out of the water. I have seen it many times. Certainly, fishes will exit water in desperate attempts to escape enemies. Dolphins take advantage of the behavior, forming a circle and catching the frightened fishes in midair. But just as we may run fast from fun or from fear, different emotions might motivate fishes to jump.
Mobula rays (蝠鲼) aren’t motivated by fear when they throw their impressive bodies — up to a seventeen-foot wingspan (the distance from the end of one wing to the end of the other) and a ton in weight — skyward in leap of up to ten feet. They do it in schools of hundreds. They usually land on their bellies, but sometimes they land on their backs. Some scientists think it might be a way of removing parasites (寄生虫). But I think that the rays are enjoying themselves.
In the clear waters of Florida’s Chassahowitzka National Wildlife Refuge, I watched several schools of fifty or more mullets(鲻鱼) moving in beautiful formation. Their well-built bodies were most evident when they leaped from the water. Most of the time I saw one or two leaps by a fish, but one made a series of seven. They usually land on their sides. Each jump was about a foot clear of the water and two to three feet in length.
Nobody knows for sure why the fish leaps. One idea is that they do it to take in oxygen. The idea is supported by the fact that mullets leap more when the water is lower in oxygen, but is challenged by the likelihood that jumping costs more energy than is gained by breathing air. It is hard to imagine they will feel any fresher when back in water.
Might these fishes also be leaping for fun? There is some new evidence. Gordon M. Burghardt recently published accounts of a dozen types of fishes leaping repeatedly, sometimes over floating objects — sticks, plants, sunning turtle — for no clear reason other than entertainment.
1.What can we say about the dolphins in Paragraph 1?
A.They have great escaping skills. B.They are easily frightened.
C.They are very clever. D.They love jumping.
2.What do the ray and the mullet have in common when jumping?
A.Both do it in groups. B.Both land on their bellies.
C.Both jump many feet out of water. D.Both make leaps one after the other.
3.What’s the author’s attitude towards the idea mentioned in Paragraph 4?
A.Anxious. B.Indifferent.
C.Approving. D.Questionable.
4.Why do fishes leap according to Gordon?
A.To remove parasites. B.To amuse themselves.
C.To take in more oxygen. D.To escape enemies.
高二英语阅读理解中等难度题查看答案及解析
If you’ve ever been on a fishing boat, you’ve probably seen crowds of birds following it, hoping to catch a snack. Now scientists use those birds’ behavior to track illegal fishing boats.
Researchers attached data loggers to the backs of 169 albatrosses (信天翁) in Indian oceans. Weighing only 42 grams, the devices included a GPS, which enabled them to detect the presence and intensity of radar signals emitting from boats. That information was then sent by satellite, so the researchers could track the location of the birds—and thus the radar-emitting boats—in real time.
The scientists then cross-checked that data against the known locations of boats, collected from a system boats use to declare themselves, called the Automatic Identification System (AIS). And noticeable differences appeared frequently.
More than a third of the times the birds “loggers” detected radar signals, and therefore a boat, but no such boat appeared in the official log—meaning that the vehicles had likely switched off their AIS—something that probably happens in illegal fishing operations.
The work suggests birds could be an effective boat-monitoring tool as long as illegal fishing operations don’t target the birds.
Fortunately, such a task would be difficult. Around fishing boats, you can find hundreds of birds at any one time that are flying around. And the birds with loggers are not marked in any way. So it’s not really possible for fishermen to pick out a specific bird.
But what concerns researchers is that albatrosses often get caught by some fishing boats. Though regulations have been established to protect against that happening—with success—illegal boats don’t necessarily obey. So scientists might be underestimating the risk posed to albatross populations.
1.What characteristic of albatrosses do scientists take advantage of in their research?
A.Their feeding patterns.
B.Their sense of direction.
C.Their greedy behaviors.
D.Their habit of following fishing boats.
2.For what purpose does a boat shut off its AIS?
A.To seek more fishes.
B.To have it mistaken for another.
C.To avoid being detected.
D.To save the trouble of declaring itself.
3.What does “such a task” in Paragraph 6 refer to?
A.Identifying birds with loggers.
B.Monitoring illegal boats.
C.Tracking radar signals automatically.
D.Fishing illegally.
4.What could be the best title for the text?
A.AIS: an Effective System to Locate Boats
B.Humans Are Good at Discovering Birds’ Nature
C.Data Loggers Help Fishermen Get a Good Harvest
D.Scientists Use Birds to Track Illegal Fishing Operations
高二英语阅读理解中等难度题查看答案及解析
Do you enjoy reading? Do you read newspapers or magazines? Chances are, if you do any of these activities, your pre-school child is on his way to becoming a reader.
The process of learning to read is complex, and one of the most important things to know is that parents can help their children learn to read. As children have conversations with adults, they hear both new and familiar words and their vocabulary grows.
There are many opportunities for adults and children to talk together, such as when riding in the car or in a bus, doing housework like fixing dinner, or bathing and getting ready for bed. A major part of conversation is listening. When children talk, adults listen and respond. Then children listen and respond, and so the flow of conversation happens.
Have you watched you pre-school child pretend to read to his younger sisters or brothers? Have you read his favorite story over and over? These experiences tell children that reading is fun. And when things are fun and they are repeated, your child will see letters. He begins to connect them to familiar words, especially the letters that make up his name. A natural next step for him to take is to write the letters.
When children see parents make a grocery list, they want to use a pencil and paper to make their own list. To encourage these beginning writing activities, have pencils, markers, crayons and scrap paper within your children’s reach.
The more children get connected with talking, listening, reading and writing, the easier it is for them to become active readers. While you as a parent have a big influence on these early behaviors, it is important to remember that opportunities for literacy experiences happen when you and your child share in the basic routines（日常生活）of everyday life.
1.The third paragraph tells us that parents can talk with their children__________.
A. during daily routines B. only in quiet places
C. in their spare time D. when they are eager to walk
2.During the process of learning to read, children may _________.
A. copy the action of the adults.
B. prefer to talk with those of their own age.
C. show no interest in reading at all.
D. waste a lot of paper and other materials.
3.When do children want to learn to write?
A. When their parents ask them to do so.
B. When they believe they can write well.
C. When they know what they want to know
D. When they can connect letters with familiar words.
4.The passage is written to _____________.
A. talk about parents’ influence on their children’s behavior
B. encourage parents to set a good example to their children
C. advise parents to make reading a part of their children’s daily life
D. make parents believe in the importance of early reading
高二英语阅读理解中等难度题查看答案及解析
If better use is_____ your spare time,you will make greater progress in that,
A spent B used of C taken D made of
高二英语单项填空中等难度题查看答案及解析
As with any house guests, indoor plants require a certain amount of basic, regular attention if they are going to feel at home. The first consideration when purchasing plants is to make reasonably sure that they are suitable for the condition in which they are going to be housed.
A general rule for most plants being brought indoors for the first time is to ensure that they have reasonable temperature of not less than 60 degrees Fahrenheit, a position out of cold air, safe from pets and not exposed to strong sunlight.
Plants love company. When plants are growing together, they create an atmosphere of damp around themselves which is far more beneficial than hot dry conditions. A group of plants will also present a more pleasing picture and provide an opportunity for a creative arrangement. There is no secret to this. Just rely on your natural feeling for harmony.
Watering and feeding plants are probably the two areas of care that are the least well understood, but, again, if you follow a few simple rules, your plants should do well. Cold slightly warm water is therefore the answer. It is usually better to pour water on to the soil on the surface of the pot rather than put the water into the pot holder at the bottom. Avoid giving small amount of water at regular intervals- it is much better to wet the soil right through the pot in one go and then to allow it to dry noticeably before giving it a further watering.
The majority of indoor plants will be in active growth from March until October, and during this time, the established ones will benefit from regular feeding. This may mean feeding with a weak liquid fertilizer(肥料) at each watering or at intervals of a week or ten days with fertilizer at a standard strength. It is important, however, to ensure that plants are not fed when growth is inactive, when the soil in the pot is dry, or too soon after the plants has been potted up.
1.In Paragraph 2, the author mainly tells us to___________.
A. buy plants that help clean indoor air
B. create a new environment with plants
C. put plants on the sunny side of the room
D. make sure of suitable conditions for plants
2.What’s the benefit of plants growing together?
A. It provides owners good company.
B. It makes it convenient to look after them.
C. It helps the air around them slightly wet.
D. It allows owners to draw a pleasant picture.
3.While watering the plants, what should we remember to do?
A. Use water that is a little warm.
B. Pour the water into the pot holder.
C. Give small amount of water at one time.
D. Consider further watering in wet weather.
4.What is the best time to feed the plants?
A. When the soil is dry.
B. When the temperature is high.
C. When their growth is active.
D. When they have just been planted.
高二英语阅读理解中等难度题查看答案及解析
Which do you enjoy ______our weekend, fishing or watching TV?
A.spending B. to spend C. being spent D. spend
高二英语单项填空简单题查看答案及解析
—Can I come to ask for some advice at any time?
— Yes, of course. _______
A. If you’re convenient. B. At your convenience.
C. Don’t worry. D. Don’t mention it.
高二英语单项填空中等难度题查看答案及解析
—Can I come to ask for some advice at any time?
— Yes, of course. _______
A. If you’re convenient. B. At your convenience.
C. Don’t worry. D. Don’t mention it.
高二英语单项填空简单题查看答案及解析
—Can I come to ask for some advice at any time?
— Yes, of course. _______
A. If you’re convenient. B. At your convenience.
C. Don’t worry. D. Don’t mention it.
高二英语单项填空简单题查看答案及解析
If I ______ about this computer program, a hage amount of time and energy would have been saved.
A．know B．knew C．had known D．have known
高二英语单项填空中等难度题查看答案及解析