Trees on the hills can stop rains from away the soil. [ ] A． washB．washes C． to washD． washing 题目和参考答案——青夏教育精英家教网—

题目内容

Trees on the hills can stop rains from ___________away the soil.

[　　]

A． wash

B．washes

C． to wash

D． washing

答案：D

练习册系列答案

相关题目

C
LONDON: What could possibly be wrong with planting trees? The benefits are obvious; they firm the soil, soak up (摄取) extra water and take carbon dioxide (二氧化碳) our of the atmosphere.
However, it now turns out that planting trees could add to global warming.
Tree roots do a great job of keeping soil firmly on the ground and out of the wind’s power. The problem is that some of those dust clouds play an important part in soaking up carbon dioxide.
Huge dust storms blow out over the oceans from dry parts of North Africa and central Asia. Tons of dust are lifted and left as a thin film over the ocean surface. The dust fuels oceanic life.
Dust from China is carried east and left in the Pacific Ocean. If a tree-planting programme there is successful and the dust supply reduced, the net result may be that less carbon dioxide gets locked away in the ocean.
Andy Ridgwell, an environmental scientist from the University of East Anglia, has spent the past few years studying dust and says his work “shows clearly that the complexity of the system and the importance of not tinkering(粗劣地修补) with it without understanding the results. For this reason the need is to focus(集中) on cutting carbon dioxide giving off rather than monkeying (瞎弄) about with the land surface.”
An American scientist, Robert Jackson, has shown that when native grassland areas are invaded(侵入) by trees, carbon is lost from the soil. “We are studying why the soil carbon disappears, but one theory is that trees do a lot more of their growing above ground compared to grasses, so less carbon goes directly into the soil from trees, ” says Jackson.
In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed(超过) by the loss of carbon from the soil below ground. Countries that plan to combat global warming by planting trees may have to think again.
Solutions to environmental problems are often more complex than they first appear, and understanding the Earth’s climate is a very great challenge.
63．People usually hold the opinion that       .
A．huge dust storms can destroy carbon dioxide
B．huge dust storms can destroy the oceans on the earth
C．huge dust storms can’t do anything beneficial for man
D．planting trees is the only way to control huge dust storms
64．Andy Ridgwell, the environmental scientist, believes that       .
A．dust plays a more important part than trees
B．trees should’t have been planted in dry places
C．carbon dioxide is harmful to everything on the earth
D．environmental problems are more complex than expected
65．Robert Jackson’s experiment proves that         .
A．grassland areas should be covered by forests
B．trees hold more carbon than grasses
C．carbon can turn grass into dust
D．less carbon can make trees grow faster
66．The underlined word “combat” in the last paragraph means      .
A．learn about      B．fight against     C．live with   D．give up

John von Neumann was the oldest of 3 children of an banker, and his speed of learning new ideas and solving problems stood out early. At 17, his father tired to persuade him not to become a mathematician because he may lead a poor life being a mathematician, and so von Neumann agreed to study chemistry as well. In 1926, at 23, he received a degree in chemical engineering and a Ph.D. in mathematics. From then on, mathematics provided well enough for him, and he never had to turn to chemistry.

In 1930, von Neumann visited Princeton University for a year and then became a professor there. His first book was published in 1932. In 1933, the Institute for Advanced Study was formed, and he became one of the 6 full-time people in the School of Mathematics（Einstein was one of the others）

World War Ⅱ hugely changed von Neumann's areas of interest. Until 1940 he had been a great pure mathematician. During and after the war, he became one of the best mathematicians who put mathematics theories into practice. During the last part of the war he became interested in computing machines and made several fundamental contributions After the war, von Neumann continued his work with computers, and was generally very active in government service. He received many awards, was president of the American Mathematical Society and was a member of the Atomic Energy Commission. He died in 1957 of cancer.

Von Neumann made several great contributions and any one of them would have been enough to earn him a firm place in history. He will be remembered as one of the greatest minds of the 20th century.

Von Neumann really was a legend in his own time, and there are a number of stories about him. His driving ability is a part of his legend. He reported one accident this Way: "I was driving down the road. The trees on the right were passing me in an orderly fashion at 60 miles per hour. Suddenly one of them stepped in my path."

1.According to the text, von Neumann's father believed that _____________.

A. a mathematician couldn't earn a lot of money

B. a mathematician needed a good memory

C. von Neumann had the ability to learn two subjects at the same time

D. von Neumann had the gift for solving problems at a high speed.

2.von Neumann published his first book at the age of _________________

A. 23 B. 26 C. 29 D. 32

3.How did World War Ⅱ affect John von Neumann?

A. He realized the importance of engineering

B. He began to research how to put mathematics into practice.

C. He left college and served at the government department.

D. He lost interest in chemistry.

4.Which of the following is true of Von Neumann?

A. He had three children

B. He died from an accident.

C. He received many rewards in his life

D. He and Einstein were classmates in Princeton University.

5.From the last paragraph, we can infer John von Neumann was _____________.

A. calm B. brave C. intelligent D. humorous

I became what I am today at the age of twelve, on a freezing cold wet day in the winter of 1975. I remember the right moment, hiding behind a fragile mud wall, peeking (窥视）into the alley (胡同）near the frozen stream. That was a long time ago ，but it’s wrong what they say about the past, I，ve learned, about how you can bury it, because the past claws its way out. Looking back now, I realize I，ve been peeking into that deserted alley for the last twenty-six years.

One day in summer, my friend, Rahim Khan called from Pakistan. He asked me to come to see him. Standing in the kitchen with the receiver to my ear, I knew it wasn’t just Rahim Khan on the line. It was my past of unatoned sins (未能弥补的罪行) After I hung up, I went for a walk along Spreckels Lane on the northern edge of Golden Gate Park. The early afternoon sun sparkled on the water where dozens of small boats sailed, driven by a gentle breeze. Then I glanced up and saw a pair of kites with long blue tails, soaring in the sky. They danced high above the trees on the west end of the park, over the windmill, floating side by side like a pair of eyes looking down on San Francisco, the city I now call home.

And suddenly Hassan5S voice whispered in my head: For you, a thousand times over. Hassan the hare-lipped kite runner. I sat on a park bench near a willow tree. I thought about something Rahim Khan said just before he hung up, almost as an after thought. There is a way to be good again. I looked up at those twin kites. I thought about Hassan. Thought about Baba. AU. Kabul. I thought of the life I had lived until the winter of 1975 came along and changed everything. And made me what I am today.

1.After 1975，the hero of the story spent his life_____.

A. with happiness B. with regret

C. in peace D. in danger

2.It can be inferred from the passage that_____.

A. Rahim Khan spoke ill of the hero

B. the hero had made up for his wrong-doings

C. San Francisco was the birthplace of the hero

D. something bad might have happened in the alley

3.The writer attracts the readers by using_____

a.an impressive opening b.a lively description of inner thoughts

c.concrete and vivid language d.a detailed plot of the story

A. abc B. bcd C. acd D. abd

4.What is the passage mainly about?

A.A hide-and-seek game. B.A forget-me-not event.

C.kite-flying competition. D.A coming-of-age story.

Do you have any skiing equipment you no longer need? A ski school in the far north of India could put it to good use.

In March we published a photo story about the extraordinary Zsnskar region in northern India，which is cut off from the outside world for more than seven months of the year，and only accessible (可通行的)via a frozen river．We also included information about the limited use of skiing in the region and the recent creation of the Zanskar Ski School:

“Despite the difficulties of travelling through the region when the snow comes，skiing hasn’t traditionally been used as a means of transport by the locals，largely because trees don't grow here, so there is little in the way of raw materials from which to make skis．In 1995, a group of British scientists in the region noticed the lack of skis and one of them returned to set up the Zanskar Ski School in Padam．The school provides lessons for a small fee and rents skis to the local people. Among the benefits that the school hopes to bring are improved education—children often find it difficult to get to school through the deep snow—and the possibility of offering ski tours to tourists in the future．So far，more than 300 local people have received training，and local doctors and policemen regularly borrow skis.”

But what we weren't able to include in the article is that the ski school is always on the look out for old skiing equipment—particularly of a size suitable for children—and, I thought. Now the European ski season is drawing to a close，there might be a few of you out there who have some old equipment you'd like to see go to a good home．If that's the ease you can get in touch with the school via their website www.zanskarski school.org.

1.What's the purpose in writing the text?

A. To raise money to develop this area

B. To attract more tourists to the area

C. To appeal to more locals to attend the school

D. To ask people to give away their skis to the school

2.The local people don't use skiing to go about because .

A. it is against the local custom

B. they don't have the wood to make skis

C. trees are in the way of the skiing route

D. it is dangerous to go skiing in this region

3. Who would be the most helpful to the school now?

A. People having old skiing equipment．

B. Students in the Zanskar Ski School

C. Locals in Zanskar region

D. Tavellers enjoying skiing

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

A. An extraordinary region in India

B. A home for old skis

C. A good means of transport

D. A popular sport—skiing

One of our biggest fears nowadays is that our kids might some day get lost in a “sea of technology” rather than experiencing the natural world. Fear – producing TV and computer games are leading to a serious disconnect between kids and the great outdoors, which will change the wild places of the world, its creatures and human health for the worse, unless adults get working on child’s play.

Each of us had a place in nature we go sometimes, even if it was torn down. We cannot be the last generation to have that place. At this rate, kids who miss the sense of wonder outdoors will not grow up to be protectors of natural landscapes. “If the decline in parks use continues across North America, who will defend parks against encroachment（蚕食）?” asks Richard Louv, author of Last Child in the Woods.

Without having a nature experience, kids can turn out just fine, but they are missing out a huge enrichment of their lives. That applies to everything from their physical health and mental health, to stress levels, creativity and cognitive（认知的）skills. Experts predict modern kids will have poorer health than their parents—and they say a lack of outside play is surely part of it; research suggests that kids do better academically in schools with a nature component and that play in nature fosters（培养）leadership by the smartest, not by the toughest. Even a tiny outdoor experience can create wonder in a child. The three – year – old turning over his first rock realizes he is not alone in the world. A clump of trees on the roadside can be the whole universe in his eyes. We really need to value that more.

Kids are not to blame. They are over – protected and frightened. It is dangerous out there from time to time, but repetitive stress from computers is replacing breaking an arm as a childhood rite（仪式）of passage.

Everyone from developers to schools and outdoorsy citizens, should help regain for our kids some of the freedom and joy of exploring, taking friendship in fields and woods that cement（增强）love, respect and need for the landscape. As parents, we should devote some of our energies to taking our kids into nature. This could yet be our greatest cause.

1..

According to Paragraph 2, the writer thinks that_____.

A. we are the last generation to experience nature.

B. the author of Last Child in the Woods don’t defend parks against encroachment

C. without having a nature experience, kids are missing out a huge enrichment of their lives

D. children should grow up to be protectors of nature

2..

According to the passage, children without experiencing nature will .

A. keep a high sense of wonder

B. be over – protected by their parents

C. be less healthy both physically and mentally

D. change wild places and creatures for the better

3..

. According to the author, children’s breaking an arm is .

A. the fault on the part of their parents

B. the natural experience in their growing up

C. the result of their own carelessness in play

D. the effect of their repetitive stress from computers

4..

In writing this passage, the author mainly intends to .

A. blame children for getting lost in computer games

B. encourage children to protect parks from encroachment

C. show his concern about children’s lack of experience in nature

D. inspire children to keep the sense of wonder about things around

试题分类