Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts to keep afloat during floods. They also have recorded how ants choose their next queen — the female whose job is to produce eggs.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned.
Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu is an engineer with the Georgia Institute of Technology, also known as Georgia Tech, saying, "If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they’re very, very good at keeping this network."
David Hu and other Georgia Tech researchers wanted to study ants and the secret of their engineering. They froze ant rafts and then looked at them with the help of computed technology, or CT images. The pictures showed that larger ants serve in central positions to which smaller ants hold. The larger ants create pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The author takes fire ants as an example to tell us ________.
A. how ants survive B. how ants seek food
C. how ants communicate D. how ants live together
2.What can we know from what David Hu said in paragraph 4?
A. Ants know the way to keep in touch in the river.
B. Ants know the way to join together closely.
C. Ants know the way to look for each other.
D. Ants know the way to build a large raft.
3.Why did the larger ants serve in central positions in their ant rafts?
A. To stress their importance. B. To help all the ants float.
C. To fight against the enemies. D. To defend their top female.
4.What ideas do the ants give us according to the passage?
A. We can use similar-shaped machines in flooding areas.
B. We can combine small robots or materials into larger ones.
C. Small and shape-changeable things might work just like ants do.
D. Small robots or materials in the shape of ants can be made.
高二英语阅读理解中等难度题
Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts to keep afloat during floods. They also have recorded how ants choose their next queen — the female whose job is to produce eggs.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned.
Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu is an engineer with the Georgia Institute of Technology, also known as Georgia Tech, saying, "If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they’re very, very good at keeping this network."
David Hu and other Georgia Tech researchers wanted to study ants and the secret of their engineering. They froze ant rafts and then looked at them with the help of computed technology, or CT images. The pictures showed that larger ants serve in central positions to which smaller ants hold. The larger ants create pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The author takes fire ants as an example to tell us ________.
A. how ants survive B. how ants seek food
C. how ants communicate D. how ants live together
2.What can we know from what David Hu said in paragraph 4?
A. Ants know the way to keep in touch in the river.
B. Ants know the way to join together closely.
C. Ants know the way to look for each other.
D. Ants know the way to build a large raft.
3.Why did the larger ants serve in central positions in their ant rafts?
A. To stress their importance. B. To help all the ants float.
C. To fight against the enemies. D. To defend their top female.
4.What ideas do the ants give us according to the passage?
A. We can use similar-shaped machines in flooding areas.
B. We can combine small robots or materials into larger ones.
C. Small and shape-changeable things might work just like ants do.
D. Small robots or materials in the shape of ants can be made.
高二英语阅读理解中等难度题查看答案及解析
Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts to keep afloat during floods. They also have recorded how ants choose their next queen — the female whose job is to produce eggs.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned.
Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu is an engineer with the Georgia Institute of Technology, also known as Georgia Tech, saying, "If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they're very, very good at keeping this network. "
David Hu and other Georgia Tech researchers wanted to study ants and the secret of their engineering. They froze ant rafts and then looked at them with the help of computed technology, or CT images. The pictures showed that larger ants serve in central positions to which smaller ants hold. The larger ants create pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The author takes fire ants as an example to tell us _____ .
A. how ants seek food B. how ants survive
C. how ants communicate D. how ants live together
2.What can we know from what David Hu said in paragraph 4?
A. Ants know the way to join together closely.
B. Ants know the way to keep safe in the river.
C. Ants know the way to look for each other.
D. Ants know the way to build a large raft.
3.Why did the larger ants serve in central positions in their ant rafts?
A. To stress their importance. B. To help all the ants float.
C. To fight against the enemies. D. To defend their top female.
4.What ideas do the ants give us according to the passage?
A. We can use similar-shaped machines in flooding areas.
B. We can combine small robots or materials into larger ones.
C. Small and shape-changeable things might work just like ants do.
D. Small robots or materials in the shape of ants can be made.
高二英语阅读理解困难题查看答案及解析
Traveling is one of the most important activities and people have been interested in it for many years. Modern traffics develops fast, so traveling to different places has become much easier than before.
Staying healthy：while traveling can make your trip happier. But do you know how to keep healthy during a trip? The following information may be useful for you.
Before leaving：
● Wear comfortable shoes, a hat and sunglasses.
● Take some necessary medicine with you. They can be used when you get sick or have other problems.
● If you do lots of sports like walking or climbing on your trip, you should do some exercise for weeks or months before you leave.
While traveling：
● Be sure not to eat dirty food or bad fruit.
● Have enough time to take a rest during your trip.
● Tap water(自来水) is not safe, so drink bottled water and always clean the cover on the bottle.
1.The passage mainly talks about ________.
A. eating B. traveling drinking D. shopping
2.If you do lots of sports while traveling, you should ________ before you leave.
A. do some exercise for weeks or months
B. learn more about sports
C. watch many sports games
D. buy a car
3.You should ________ before you leave your home for trip.
A. take some medicine with you
B. clean your house
C. drink much water
D. wear warm clothes
4.You had better ________ while you are having a trip.
A. do enough exercise
B. have enough time to take a rest
C. drink tap water
D. be too tired
5.If you ________ while travelling, your trip will be happier.
A. walk fast B. eat too much
C. keep healthy D. climb the mountain
高二英语阅读理解中等难度题查看答案及解析
Humans have long been interested greatly in the idea of being able to walk on water. Sadly, biological facts prevent us ever realizing this dream without artificial aid—we simply weigh too much, and all our weight pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.
However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicus basilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will reach a speed of 20 steps per second to keep moving forward. For humans, we would need huge feet that we could bring up to our ears in order to create enough “hitting”.
But fortunately there is an alternative: cornflour(玉米淀粉). By adding enough of this common thickening agent to water (and it does take a lot), you can create a special mixture that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(微粒) in the water get together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of this adequately thick liquid of cornflour.
Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings(救生圈) ready in case you start to sink—and take a bath afterward!
1.Walking on water hasn't become a reality mainly because humans _________.
A. are not interested in it
B. are afraid to make an attempt
C. have not invented proper tools
D. have biological limitations
2.What do we know about Basilicus basilicus from the passage?
A. It is light enough to walk on water.
B. It can run across water at a certain speed.
C. Its huge feet make it able to stay above water.
D. Its unique skin keeps it from getting wet in water.
3.What is the function of the cornflour according to the passage?
A. To help the liquid behave normally.
B. To turn the water into solid.
C. To create a thick liquid.
D. To make the water move rapidly.
4.What is the author’s attitude toward the idea of humans’ walking on water?
A. It is risky but beneficial.
B. It is impractical though possible in thoery.
C. It is crazy and cannot become a reality.
D. It is interesting and worth trying.
高二英语阅读理解中等难度题查看答案及解析
Libraries everywhere in the world have always been people’s only access to important sources of information. This historical function of libraries has worked out for centuries and has made libraries a necessity to people. Now, that function has been called into question by the fast development of digital media over the past several decades. In order to continue to hold the public interest, libraries everywhere are forced to develop means of granting access to these expensive new services to average people.
In the past, the publishing industry maintained the rights of libraries to freely provide published materials on the condition that libraries bought so many of their books. Since the new electronic publications can easily be copied in their completeness by the library readers, the publishing industry is reconsidering its former support of the library system. There have even been attempts to stop libraries from delivering digital media.
In addition to the reluctant cooperation of the publishing industry, there is the problem that the newer forms of information are much more specialized than those which they replace. Deciding how to transfer already limited resources is increasingly difficult as there are more methods. While a single reference index(索引) might have covered an entire field in the past, now there are frequently several specialized indexes available in electronic form. Above all, in order to continue to make use of the newer technology, libraries must decide which kinds of material are most useful to the majority of their readers. There are many different solutions being applied, but only the process of trial and error will help find out the most effective method.
（Note: Answer the questions or complete the statements in NO MORE THAN 20 WORDS）
1. What has been called into question?
2. In the past, publishers cooperate with libraries because ______________.
3. The most important way to use the new technology is to determine ________
4. According to the passage, how can best solutions be found?
高二英语其他题中等难度题查看答案及解析
people have always been curious ______ how living things on the earth exactly began.
| A．in | B．at | C．of | D．about |
高二英语单项填空简单题查看答案及解析
I have always been interested in making things. When I was a child, I enjoyed drawing, but I also liked making things out of clay(粘土). I won a prize for one of my paintings when I was fourteen. That may be why I went to art school four years later. But I studied painting at first, not pottery(制陶). I like being a potter because I like to work with my hands and feel the clay. I'm happy working by myself and being near my home. I don't like mass-produced(集体生产)things, because they are made by machines. I think crafts(手工艺) are very important and crafts-people make things cleverly with hands. They make our lives colorful. When I left school, I got some money. I hope to become a full-time crafts-woman. This work-place is small, but I wish to move to a larger one next year.
1.From the passage we are sure that the writer is a _______.
A. student B. teacher C. man D. woman
2.The writer got into art school because of ______.
A. liking to make things
B. enjoying working near her home
C. a prize won when the writer was young
D. a wish to be a potter
3.When entering art school, the writer was about ______.
A. 14 B. 16 C. 18 D. 21
4.The writer is talking about her workplace _____.
A. unhappily B. hopefully C. seriously D. angrily
高二英语阅读理解中等难度题查看答案及解析
The Meanings of Dreams
Sleep and dreams have interested people for centuries. Scientists are learning more about sleep, but they still know very little about why we dream.
________1.________ First, we have most of our dreams during REM (rapid eye movement) sleep. At this time, the brain is very active. Second, everyone dreams – even if we cannot remember doing so when we awaken. ________2.________ While we are asleep, it works more slowly and sometimes puts our thoughts and memories together in strange ways.
________3.________ Some believe that our dreams are associated with thoughts and feelings that we experience while we are awake. Many dream researchers think that a dream about death, for example, is really about an important life change. ________4.________ Dreams about a car or travel often represent feelings about your own life. Dreams about teeth – especially broken or loose ones may indicate stress and fear. Dreams in which you are flying often represent freedom or escape.
Researchers think people in our dreams can tell us something about ourselves. If the person in the dream was yelling (叫喊), for example, maybe you are angry. ________5.________
There is still a lot about dreaming that we do not understand. By learning more about our dreams, we may learn more about ourselves.
A．Dreams may be more important than sleep.
B．Scientists do not know for certain why we dream.
C．If he or she was terrified, then maybe you are afraid of something.
D．Modern research can tell us some important things about dreams.
E. There are three things you should pay attention to to have a sweet dream.
F. Finally, a part of our brain helps us to understand daily experiences we have.
G. Dreams about telephones are thought to be about giving or receiving an important message.
高二英语信息匹配中等难度题查看答案及解析
The scientists have made an exhaustive study of the virus _______ many people have been inflected.
A. to which B. in which C. with which D. for which
高二英语单项填空中等难度题查看答案及解析
Scientists have been the temperature of the oceans to see how it changes over a period of time.
A. predicting B. controlling
C. increasing D. charting
高二英语单项填空简单题查看答案及解析