Secrets of the RainbowThe storm is over: the ...

Secrets of the Rainbow

The storm is over: the sun is shining. But when you go outside, the rain is still falling, and you see a breathtaking sight in the sky: a shimmering arch of red, orange, yellow, green, blue and purple light. No pot of gold sits at that rainbow’s end.1. Rainbows are rare because they need two things that don’t often go together: sunlight and rain.2.But it contains all the colors of the rainbow. A rainbow appears when raindrops split these colors apart, letting us see them.

In empty space, all these colors travel equally fast: 671 million miles an hour. But when sunlight passes through water, it slows down. 3. These differences in speed make a rainbow. Red light goes fastest. Orange is almost as fast. Yellow is a little slower, and green is a little slower than that. Blue is slower still, and purple light is the slowest.

As light enters water, it bends, or refracts (折射). The amount of refraction depends on how fast the light travels through water. So once sunlight enters a raindrop, the different colors split apart and travel separate paths. 4. They exit the front of the raindrop, bending again as they go from water to air. So they are still on separate paths, with the different colors next to one another, and you see a rainbow when you look at the falling raindrops.

After you find a rainbow, look for a second rainbow outside the main one. It’s called a secondary rainbow and is usually fainter, so it’s harder to see. 5. The main rainbow has red on top and purple on bottom. The secondary rainbow has red on bottom and purple on top.

A.Sunlight usually looks pale.

B.Its colors are in the opposite order.

C.Instead, a rainbow is its own reward.

D.There’s more to a rainbow than we can see.

E.Some colors go through water faster than others.

F.Then the colors reflect off the back of the raindrop.

G.A rainbow only needs the right mix of sunlight and rain.

高二英语七选五中等难度题查看答案及解析

A desert is a beautiful land of silence and space. The sun shines, the wind blows, and time and space seem endless. Nothing is soft. The sand and rocks are hard, and many of the plants even have hard needles instead of leaves.

The size and location of the world's deserts are always changing. Over millions of years, as climates change and mountains rise, new dry and wet areas develop. But within the last 100 years, deserts have been growing at a frightening speed. This is partly because of natural changes, but the greatest makers are humans.

Humans can make deserts, but humans can also prevent their growth. Mauritania is planting a similar wall around Nouakchott, the capital. Iran puts a thin covering of oil on sandy areas and plants trees. The oil keeps the water and small trees in the land, and men on motorcycles keep the sheep and goats away. The USSR and India are building long canals to bring water to desert areas.

1.In this passage, the underlined word “needles” refers to ________.

A．small, thin pieces of steel

B．long, thin pieces of branches

C．thin, hard, pointed leaf

D．small, thin pieces of sticks

2.Which of the following is NOT true?

A．The greatest desert makers are human beings.

B．There aren't any living things in the deserts.

C．Deserts have been changing quickly.

D．The size of the deserts is always growing.

3.People in some countries are fighting a battle against ________.

A．the growth of deserts

B．desert climate

C．natural changes

D．the disappearance of desert

4.What does the author want to tell us?

A．Deserts are lands of hardness, silence and space.

B．The deserts of the world are changing from time to time.

C．Man is to take measures to control the growth of deserts.

D．Deserts have grown at a fast pace in the past 10 years.

高二英语阅读理解中等难度题查看答案及解析

Edgar felt quite excited at the thought of his first swim of the summer. With the sun shining down so strongly, the sea was certain to be warm enough. He walked quickly along the sea-front towards the steps that led on to the sands. He smiled cheerfully at the passersby. He had just smiled and raised his hat to an elderly lady when a man with a camera caught his arm and stopped him. Edgar heard a little buzzing noise from the camera.

“Your photograph, sir, in glorious colour in just one moment if you please,” said the man in one breath. Then the buzzing stopped, and he held the photograph in his hand and was waving it to and fro. In a

moment he handed it over, and Edgar saw the bright blue splash of his shirt half filling the picture.

“Seventy pence, sir,” the man said. “It’s the bargain of your holiday.”

“Seventy pence,” Edgar repeated, mildly. “For this?” He stared at the photographer.

“They’re normally eighty-five, sir, but for a single subject I make a cut-price offer. It’s the best value you’ll get in Chadwell.”

“You’ll have to make a better offer,” Edgar said. It was a good photo though, he thought, so bright and clear. His hat was held high, and he was smiling broadly at the old lady, whose arm and handbag came into a lower corner. He had had no idea that he was being snapped. He thought he was really quite a good-looking chap.

“That’s as good as any studio job that would cost you pounds,” said the cameraman. “It’s better in a way because it’s so natural. Only seventy pence, sir.”

“I’ve never paid so much for a snap in my life. It simply isn’t worth that kind of money. It’s not as if I need the thing. Look, I’ll give you twenty-five.”

“No, I can’t do that. Each of these instant colour shots costs me 50p — that’s the price of the blank frame, so you see…”

“Criminal, criminal,” Edgar broke in. “You want a profit of forty per cent. Well, not at my expense, I’m afraid. I’ll give you your 50p and that’s that.”

“Let me see, then.” The man suddenly took the photograph out of Edgar’s hand. “I can’t waste any more time with you. It’s 70p or I keep it.”

“Keep it,” Edgar said. He turned, looked out to the sea, and then walked quickly away.

1.Why do you suppose Edgar was in Chadwell?

A. It was his hometown.

B. He was there on holiday.

C. He was in the making of a film.

D. He was there to have his photograph taken.

2.Edgar smiled at and raised his hat to the lady because ________.

A. he thought he recognized her

B. he wanted the photograph to be amusing

C. she was having her photograph taken

D. he was feeling excited and cheerful

3. The photographer lowered his price to 70p because __________.

A. Edgar wanted to bargain for the photo

B. Edgar couldn’t afford to pay the normal price

C. Edgar was the only person in the photo

D. there was only one copy of the photo

4.What did Edgar think of the photo?

A. He thought it made him look like a criminal.

B. He liked it but thought it was too dear.

C. It annoyed him because he hadn’t expected it.

D. He thought it was a bargain at the price.

5.We can infer from the passage that _______ .

A. Edgar was an indifferent but good-looking man

B. Edgar smiled at the photographer because he was being photographed

C. the photographer was actually a criminal

D. Edgar didn’t buy the snap at length.

高二英语阅读理解中等难度题查看答案及解析

Farming is moving indoors，where the sun never shines，where rainfall is irrelevant and where the climate is always right.The perfect crop field could be inside a windowless building with controlled light，temperature，wetness，air quality and nutrition.It could be in a New York high­rise or a sprawling complex in the Saudi desert.It may be an answer to the world's food problems.

The world already is having trouble feeding itself.Half the people on Earth live in cities，and nearly half of those－ about 3 billion－are hungry or ill­fed.Foodprices，currently increasing，are buffeted by dryness，floods and the cost of energy required to plant，harvestand transport.And prices will only get more unstable.Climate change makes long­term crop planning uncertain.Farmers in many parts of the world already are using water available to the last drop.And the world is getting more crowded：by mid­century，the global population will grow from 6.8 billion to 9 billion.

To feed so many people may require expanding farmland　 at the expense of forests and wilderness，or finding ways to completely increase crop output.

Gertjan Meeuws has taken the concept of a greenhouse a step further，growing vegetables and house plants in enclosed (封闭的) and regulated environments.In their　 research station，water flows into the pans when needed，and the temperature is kept constant.Lights go on and off，creating similar day and night，but according to the rhythm of the plant.

A building of 100 square meters and layers (层) of plants could provide a daily diet of 200 grams of fresh fruit and vegetables to the entire population of Den Bosch，about 140,000 people.Their idea isn't to grow foods that require much space，like corn or potatoes.

Here sunlight is not only unnecessary but can be harmful.Plants need only specific wavelengths of light to grow.Their growth rate is three times faster than under greenhouse conditions.They use about 90 percent less water than outdoor agriculture.And city farming means producing food near the consumer，and there's no need to transport it long distances.

1.What can we mainly learn from Paragraph 2?

A. The climate is worse and worse.

B. The city people live a hard life.

C. The world has difficulty feeding its people.

D. The world's population is increasing fast.

2.Which of the following is true of the environments in　 the research station?

A. The temperature is often changed.

B. Sunshine is in great need for plants.

C. Day and night depends on plants.

D. Air quality is controlled by plants.

3.It can be inferred from the text that Gertjan　 Meeuws's farming________.

A. helps save sea water a lot

B. is highly adaptable

C. resembles greenhouse agriculture

D. suits the production of corn

4.What is the text mainly about?

A. Development of indoor farming.

B. Great Revolution in farming.

C. Advantages of indoor farming.

D. Sunless，rainless indoor farming.

高二英语阅读理解中等难度题查看答案及解析

Farming is moving indoors, where the sun never shines, where rainfall is irrelevant (无关的) and where the climate is always right. The perfect crop field could be inside a windowless building with controlled light, temperature，humidity，air quality and nutrition. It could be in a New York high- rise or a complex （建筑群） in the Saudi desert. It may be an answer to the world’s food problems.

The world already is having trouble feeding itself. Half the people on Earth live in cities, and nearly half of those – about 3 billion – are hungry or ill–fed. Food prices, currently increasing, are badly affected by dryness, floods and the cost of energy required to plant, harvest and transport it. And prices will only get more unstable. Climate change makes long-term crop planning uncertain. Farmers in many parts of the world already are using water available to the last drop. And the world is getting more crowded: by mid-century, the global population will grow from 6.8 billion to 9 billion.

To feed so many people may require expanding farmland at the expense of forests and wilderness, or finding ways to greatly increase crop output.

Gertjan Meeuws and three other Dutch bioengineers grow vegetables and house plants in closed and regulated environments. In their research station, water flows into the pans when needed, and the temperature is kept constant. Lights go on and off, creating “day” and “night”, but according to the rhythm of the plant.

Meeuws says a building of 100 square meters and layers of plants could provide a daily diet of 200 grams of fresh fruit and vegetables for the entire population of Ken Bosch, about 140,000 people. Their idea isn’t to grow foods that require much space, like corn or potatoes.

Sunlight is not only unnecessary but can be harmful. Plants need only specific wavelengths of light to grow. Their growth rate is three times faster than under greenhouse conditions. They use about 90 percent less water than outdoor agriculture. And city farming means producing food near the consumer, so there’s on need to transport it long distances.

1.According to the text, Gertjan Meeuws’ farming _______.

2.What is the second paragraph mainly about ?

3.What is the purpose of the text ?

高二英语阅读理解困难题查看答案及解析

We can see the blue sky and the shining sun. There is no possibility _____ it will rain or snow today.

A. which         B. where        C. that           D. whether

高二英语单项填空简单题查看答案及解析

We can see the blue sky and the shining sun．There is no possibility _____ it will rain or snow today．

A．which         B．where           C．that           D．whether

高二英语单项填空中等难度题查看答案及解析

The sun is shining when I get on No. 151 bus. We passengers sit jammed together in heavy clothes. No one speaks. That’s one of the unwritten rules of Chicago commuting. Although we see the same faces every day, we prefer to hide behind our newspapers. The phenomenon is striking: people who sit so close together are using those thin sheets of newsprint to keep their distance.

As the bus approaches the Magnificent Mile, a voice suddenly rings out: “Attention! Attention!” Papers rattle (发出细小声). Necks crane (伸长). “This is your driver speaking.”

We look at the back of the driver’s head. His voice has authority.

“All of you put your papers down.”

The papers come down, an inch at a time. The driver waits. The papers are folded and placed on our laps.

“Now, turn and face the person next to you. Go ahead.”

Amazingly, we all do it. Still, no one smiles.

I face an older woman, her head wrapped tightly in a red scarf. I see her nearly every day. Our eyes meet. We wait, unblinking, for the next order from the driver.

“Now, repeat after me…” It is a command, delivered in the tones of a drill sergeant (操练军士). “Good morning, neighbor!”

Our voices are weak and timid. For many of us, these are the first words we have spoken today. But we say them at the same time, like schoolchildren, to the strangers beside us.

We smile and can’t help it. We have said it; the barrier has been broken. Good morning, neighbor. It is not so hard after all. Some of us repeat it. Others shake hands. Many laugh.

The bus driver says nothing more. He doesn’t need to. Not a single newspaper goes back up. I hear laughter, a warm sound I have never heard before on bus No. 151. This day is starting off better than most.

1.On hearing the sudden utterance of “Attention!”, the passengers ___________.

A. stopped reading and put down their newspapers immediately

B. looked up from the newspapers to see who was speaking

C. sat still without response

D. were frightened

2.The underlined word “commuting” in Paragraph 1 most probably means ___________.

A. daily traveling between home and work　　 B. long-distance ride

C. communication technology　　　　　　 　　 D. behavior patterns

3.Which of the following is true according to the passage?

A. The passengers on the crowded bus are so absorbed in reading their newspapers that no one speaks.

B. The passengers are physically close together but mentally they keep each other at a terrible distance.

C. The passengers don’t follow the driver’s instruction at first.

D. When the bus driver says nothing more, the passengers pick up and read their newspapers again.

4.What would be the best title for the text?

A. The Warmth of Communication　　 B. The Exchange of Information

C. The Power of Observation　　 D. The Attitude to Loneliness

高二英语阅读理解中等难度题查看答案及解析

The sun is shining when I get on No. 151 bus. We passengers sit jammed together in heavy clothes. No one speaks. That’s one of the unwritten rules of Chicago commuting. Although we see the same faces every day, we prefer to hide behind our newspapers. The phenomenon is striking: people who sit so close together are using those thin sheets of newsprint to keep their distance.

As the bus approaches the Magnificent Mile, a voice suddenly rings out: “Attention! Attention!” Papers rattle (发出细小声). Necks crane (伸长). “This is your driver speaking.”

We look at the back of the driver’s head. His voice has authority.

“All of you put your papers down.”

The papers come down, an inch at a time. The driver waits. The papers are folded and placed on our laps.

“Now, turn and face the person next to you. Go ahead.”

Amazingly, we all do it. Still, no one smiles.

I face an older woman, her head wrapped tightly in a red scarf. I see her nearly every day. Our eyes meet. We wait, unblinking, for the next order from the driver.

“Now, repeat after me…” It is a command, delivered in the tones of a drill sergeant (操练军士). “Good morning, neighbor!”

Our voices are weak and timid. For many of us, these are the first words we have spoken today. But we say them at the same time, like schoolchildren, to the strangers beside us.

We smile and can’t help it. We have said it; the barrier has been broken. Good morning, neighbor. It is not so hard after all. Some of us repeat it. Others shake hands. Many laugh.

The bus driver says nothing more. He doesn’t need to. Not a single newspaper goes back up. I hear laughter, a warm sound I have never heard before on bus No. 151. This day is starting off better than most.

1.On hearing the sudden utterance of “Attention!”, the passengers ___________.

A．stopped reading and put down their newspapers immediately

B．sat still without response

C．looked up from the newspapers to see who was speaking

D．were frightened

2.The underlined word “commuting” in Paragraph 1 most probably means ___________.

A．long-distance ride

B．daily traveling between home and work

C．communication technology

D．behavior patterns

3.Which of the following is true according to the passage?

A．The passengers on the crowded bus were so absorbed in reading their newspapers that no one spoke.

B．When the bus driver said nothing more, the passengers picked up and read their newspapers again.

C．The passengers didn’t follow the driver’s instruction at first.

D．The passengers were physically close together but mentally they kept each other at a terrible distance.

4.What would be the best title for the text?

A．The Warmth of Communication

B．The Exchange of Information

C．The Power of Observation

D．The Attitude to Loneliness

高二英语阅读理解中等难度题查看答案及解析

The sun is shining when I get on No. 151 bus. We passengers sit jammed together in heavy clothes. No one speaks. That’s one of the unwritten rules of Chicago commuting. Although we see the same faces every day, we prefer to hide behind our newspapers. The phenomenon is striking: people who sit so close together are using those thin sheets of newsprint to keep their distance.

As the bus approaches the Magnificent Mile, a voice suddenly rings out: “Attention! Attention!” Papers rattle (发出细小声). Necks crane (伸长). “This is your driver speaking.”

We look at the back of the driver’s head. His voice has authority.

“All of you put your papers down.”

The papers come down, an inch at a time. The driver waits. The papers are folded and placed on our laps.

“Now, turn and face the person next to you. Go ahead.”

Amazingly, we all do it. Still, no one smiles.

I face an older woman, her head wrapped tightly in a red scarf. I see her nearly every day. Our eyes meet. We wait, unblinking, for the next order from the driver.

“Now, repeat after me…” It is a command, delivered in the tones of a drill sergeant (教官). “Good morning, neighbor!”

Our voices are weak and timid. For many of us, these are the first words we have spoken today. But we say them at the same time, like schoolchildren, to the strangers beside us.

We smile and can’t help it. We have said it; the barrier has been broken. Good morning, neighbor. It is not so hard after all. Some of us repeat it. Others shake hands. Many laugh.

The bus driver says nothing more. He doesn’t need to. Not a single newspaper goes back up. I hear laughter, a warm sound I have never heard before on bus No. 151. This day is starting off better than most.

1.On hearing the sudden utterance of “Attention!”, the passengers ___________.

A. stopped reading and put down their newspapers immediately

B. looked up from the newspapers to see who was speaking

C. sat still without response

D. were frightened

2.The underlined word “commuting” in Paragraph 1 most probably means ___________.

A. daily traveling between home and work

B. long-distance ride

C. communication technology

D. behavior patterns

3.Which of the following is true according to the passage?

A. The passengers on the crowded bus were so absorbed in reading their newspapers that no one spoke.

B. The passengers were physically close together but mentally they kept each other at a terrible distance.

C. The passengers didn’t follow the driver’s instruction at first.

D. When the bus driver said nothing more, the passengers picked up and read their newspapers again.

4.What would be the best title for the text?

A. The Warmth of Communication

B. The Exchange of Information

C. The Power of Observation

D. The Attitude to Loneliness

高二英语阅读理解中等难度题查看答案及解析