Humans have long been interested greatly in t...

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

The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid---we simply weigh too much, and all our mass 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 take as many as 20 steps per second to keep moving forward. For humans to do this, we，d need huge feet that we could bring up to our ears in order to create adequate w hitting. ’’

But fortunately there is an alternative : cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “non-Newtonian” liquid that doesn’t behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子）in the water group 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 an 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 handy in case you start to sink--and take a shower afterward!

1.Walking on water hasn’t become a reality mainly because humans______.

A.are not interested in it

B.have biological limitations

C.have not invented proper tools

D.are afraid to make an attempt

2.What do we know about Basilicus basilicus from the passage?

A.It is light enough to walk on water.

B.Its huge feet enable it to stay above water.

C.It can run across water at a certain speed.

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 create a thick liquid.

B.To turn the water into solid.

C.To help the liquid behave normally.

D.To enable the water to 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 interesting and worth trying.

C.It is crazy and cannot become a reality.

D.It is impractical though theoretically possible.

高二英语阅读理解中等难度题查看答案及解析

The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid—we simply weigh too much，and all our mass 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 Basilicusbasilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several metres, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we'd need huge feet that we could bring up to our ears in order to create adequate “hitting”．

But fortunately there is an alternative: corn flour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “nonNewtonian” liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子) in the water group 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 an adequately thick liquid of corn flour.

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 handy in case you start to sink—and take a shower afterwards!

1.What do we know about Basilicusbasilicus from the passage?

A. It is light enough to walk on water.

B. Its huge feet enable it to stay above water.

C. It can run across water at a certain speed.

D. Its unique skin keeps it from getting wet in water.

2.What is the function of the corn flour according to the passage?

A. To create a thick liquid.

B. To turn the water into solid.

C. To help the liquid behave normally.

D. To enable the water to move rapidly.

3.What is the author's attitude towards the idea of humans' walking on water?

A. It is risky but beneficial.

B. It is interesting and worth trying.

C. It is crazy and cannot become a reality.

D. It is impractical though theoretically possible.

高二英语阅读理解中等难度题查看答案及解析

The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid --- we simply weigh too much, and all our mass 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 take as many as 20 steps per second to keep moving forward. For humans to do this, we’ll need huge feet that we could bring up to our ears in order to create adequate “hitting.”

But fortunately there is an alternative: cornflour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “non-Newtonian” liquid that doesn’t behave like normal water. Now if the surface of the water is hit hard enough, particles（粒子）in the water group 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 an 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 handy in case you start to sink --- and take a shower afterward!

1.Walking on water hasn’t become a reality mainly because humans _______.

A. are not interested in it　　　　　　　　　　　　

B. have biological limitations

C. have not invented proper tools　　　　　　　

D. are afraid to make an attempt

2.What do we know about Basilicus basilicas from the passage?

A. It is light enough to walk on water.　　　　　

B. Its huge feet enable it to stay above water.

C. It can run across water at a certain speed　　

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 create a thick liquid.　　　　　　　　　　　　

B. To turn the water into solid.

C. To help the liquid behave normally.　　　　　

D. To enable the water to move rapidly.

4.What is the author’s attitude toward the idea of human’s walking on water?

A. It is risky but beneficial.　　　　　　　　　　

B. It is interesting and worth trying

C. It is crazy and cannot become a reality　　

D. It is impractical; though theoretically possible

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 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

. Great ____have been made in the field of computer science in the past decades.

高二英语单项填空简单题查看答案及解析

There have been great changes in the lives of women. During the twentieth century ,there was an unusual shortening of the time of a woman’s life spent in caring for children. A woman marrying at the end of the 19th century would probably have been in her middle twenties, and would be likely to have about eight children, of whom about five lived till they were five years old. By the time the youngest was fifteen, the mother would have been in her early fifties and would expect to live a further twenty years, during which custom, chance and health made it unusual for her to get paid work. Today women marry younger and have fewer children. Usually a woman’s youngest child will be fifteen when she is forty-five and is likely to take paid work until retirement at sixty. Even while she has the care of children, her work is lightened by household appliances(家用电器) and convenience(方便) foods.

This important change in women’s way of life has only recently begun to have its full effect on women’s economic position. Even a few years ago most girls left school at the first opportunity and most of them took a full-time job. However, when they married, they usually left work at once and never returned to it. Today the school-leaving age is sixteen, many girls stay at school after that age, and though women tend to marry younger, more married women stay at work at least until shortly before their first child is born. Very many more afterwards, return to full or part-time work. Such changes have led to a new relationship in marriage, with both husband and wife accepting a greater share of the duties and satisfaction of family life, and with both husband and wife sharing more equally in providing the money and running the home, according to the abilities and interest of each them.

1.Women marrying at the end of the 19th century ________.

A. would have fewer children than those today.

B. would have more children than those today.

C. lived as hard as those in the 20th century

D. lived more comfortably than those in the 20th century

2. According to the passage, a woman in the 19th century would likely to have about eight children and _______.

A. only about three of them could live more than five years old.

B. only about three of them could live for five years.

C. about eight children lived to be more than five years.

D. about eight children lived to be less than five years.

3. From the second paragraph, we know _______.

A. women today are not willing to run their home together with their husbands.

B. women today wouldn’t like to do any housework.

C. women today will return to work after they have their babies.

D. were unlikely to find jobs like the mothers before .

4.According to the passage, which of the following is right ?

A. in the past most women often stay at home after leaving school

B. women today like to marry men younger than themselves

C. women today are playing important parts in work and family life.

D. husbands today needn’t do any work at home.

高二英语阅读理解中等难度题查看答案及解析

Baths and bathing have long been considered of medical importance to man. In Greece there are the ruins of a water system for baths built over 3,000 years ago. The Romans had warm public baths. In some baths, as many 3,000 persons could bathe at the same time.

Treating disease by taking bathing has been popular for centuries. Modern medical bathing first became popular in Europe and by the late 1700’s has also become popular in the United States.

For many years frequent bathing was believed to be bad for one’s health. Ordinary bathing just to keep clean was avoided , and perfume was often used to cover up body smells!

By the 1700’s doctors began to say that soap and water were good for health. They believed that it was good for people to be clean. Slowly, people began to bathe more frequently. During the Victorian Age of the late 19th century, taking a bath on Saturday night became common.

In the United States ordinary bathing was slow to become popular. During the 18th and early 19th centuries, many Americans were known as “The Great Unwashed!” In one American city , for example, a person was only allowed to take a bath every thirty days! That was a law!

Frequency of bathing today is partly a matter of habit. People know that bathing for cleanliness is important to health, Doctors know that dirty bodies increase the chance of diseases. As a result, in the United States, people generally bathe often. Some people bathe once a day at least. They consider a daily bath essential　 to good health.

1.A water system for baths was built by _______ over 3,000 years ago.

A. the Romans 　　　　 B. the Greeks

C. the Americans　　　 D. the Europeans

2.Dirty bodies can_______.

A. ruin one’s business　　　　　　　 B. cause disease

C. drive customers away　　　　　　　　 D. cause good health

3. In the 18th century doctors believed that being clean was_______.

A. unimportant　　　 B. good for health

C. harmful　　 　　　 D. important

4.The underlined word perfume probably means________.

A. a sweet smelling substance　　　　 B. good health

C. a strange smelling substance　　　　 D. large wealth

高二英语阅读理解中等难度题查看答案及解析