A. still B. again C. no longer D. even 查看更多

 

题目列表(包括答案和解析)

阅读理解

  A tropical fish that lives in mangrove swamps(湿地)across the Americas can survive out of water for months at a time, similar to how animals adapted to land millions of years ago, a new study shows.

  The Mangrove Rivulus, a type of small tropical killerfish, seeks refuge in shallow pools of water in crab caves, nut shells or even old beer cans in the tropical mangrove swamps of Belize, the United States and Brazil.

  When their living place dries up, they group together on the land in hollowed logs(圆木)and breathe air through their skin instead of their gills(腮)until they can find water again.The fish, whose scientific name is Rivulus Marmoratus, can grow as large as three inches.

  The scientific breakthrough came after a trip to Belize.

  “We kicked over a log and the fish just came dropping out,”Taylor told Reuters in neighboring Guatemala by telephone.He said he will publish his study on the fish in The American Naturalist journal early next year.

  In lab tests, Taylor said he found the fish can survive for up to 66 days out of water without eating, and their metabolism(新陈代谢)keeps functioning.

  Some other fish can survive briefly out of water.The walking catfish found in Southeast Asia can move about over land for hours at a time, while lungfish found in Australia, Africa and South America can survive out of water, but only in a sleeping state.

  No other known fish can be out of water as long as the Mangrove Rivulus and remain active, according to Patricia Wright, a biologist at Canada's University of Guelph.

  “These animals live in an environment that is similar to conditions that existed millions of years ago, when animals began making the evolution from water onto land,”she said.

(1)

The writer mentions the catfish and lungfish in the passage with the aim to ________.

[  ]

A.

tell us that the Mangrove Rivulus is much larger

B.

show that there are many other fish that can live out of water

C.

make a comparison with the Mangrove Rivulus

D.

tell us that there is long way in the study about fish

(2)

How does this discovery come out?

[  ]

A.

Scientists found it accidentally and made some experiments.

B.

Local people in mangrove swamps across the Americas discovered it.

C.

Reuters reporter offered the news to a scientist by telephone.

D.

Lab study shows scientists its living place.

(3)

The Mangrove Rivulus is quite different from other fish because it can ________.

[  ]

A.

live for a period of time out of water without eating

B.

breathe with their lung in a sleeping state

C.

grow as large as three inches

D.

survive out of water much longer and remain active

(4)

What does the last sentence imply?

[  ]

A.

The fish can live a life as long as millions of years.

B.

The fish will be helpful in studying the evolution of animals.

C.

The environment on earth is still the same as it was millions of years ago.

D.

Animals begin making evolution from water onto land nowadays.

查看答案和解析>>

阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项。

A

Imagine landing in a foreign country where you cannot speak the language, understand the culture and don’t know anybody. Wouldn’t it be nice to have a friend who could help you out?

John Smith, an English explorer who landed in America in 1607, found the best friend ever. She was a Native American named Pocahontas (1595-1617). And she did more than teach Smith the language: she saved his life, twice.

Smith was captured by members of Pocahontas’s tribe (部落) and was going to be killed. But for some reason, the Chief’s daughter, Pocahontas, felt sorry for Smith (who was probably the first white man she had ever seen) and threw her body over his to protect him. Smith returned safely to the small village he was living in.

During the winter the English settlers did not know how to get food from nature. Pocahontas often brought food for Smith and his friends.

A year later Pocahontas’s father tried to kill Smith again because the Native Americans were very scared the English would try to take over their land. Pocahontas warned him and he was able to escape.

Later she became a Christian and eventually married an Englishman named John Rolfe.

She spent the last year of her life in London.

Pocahontas has become an American legend (传奇). Her life story has been re-created in many books and films, including Disney’s 1995 film, Pocahontas.

One of the reasons she is so popular is that many Europeans look at Pocahontas as an excellent example of how a minority can adjust into the majority. Pocahontas is also respected because of her selfless love. She proved that people can be kind and loving even to people of a different race or culture. John Smith was very different from Pocahontas but she could see he was a good man and that was all that mattered. No race or country owns goodness, love and loyalty.

1.What difficulties might early European settlers meet in America EXCEPT ______?

A. the fierce conflict with Native Americans

B. bad-tempered natives who enjoyed killing

C. unfamiliarity with a foreign land

D. lack of food in winter

2.Pocahontas saved John Smith twice because ______.

A. he was the first white man she had ever seen in her life

B. she wanted to become a Christian and marry an Englishman

C. she believed in general kindness even to people of a different race

D. she was on the settlers’ side and against her cruel father

3.Which is NOT an element to make Pocahontas a legend?

A. Her tribal background and her marriage to a white settler.

B. Her selfless help to people regarded as enemy of her tribe.

C. Her complicated life story different from common people’s.

D. The recreation of her life story in the 1995 Disney film.

4.According to the text, Europeans think Pocahontas _____.

A. was brave to break away from her own tribe

B. set a good example for other natives to accept the white settlers

C. was a selfless Christian who can love her enemy

D. was open to a more advanced culture

5.What can we infer from the passage?

A. The battles between early settlers and Native Americans resulted from their               fighting for land.

B. The Europeans think the early settlers should have learned to adjust to the local cultures.

C. The creation of America is based on the settlers’ victory over the Native  Americans.

D. People from different cultures can never really get along well with each other.

B

Chinese students aren’t the only ones who have a sleep loss problem. In Australia, teenagers are also missing out on, on average, one hour’s sleep every night during the school week.

Organized activities and homework push bedtimes later, the first large-scale Australian study of children’s sleeping habits has revealed (显示). Their sleep deprivation (剥夺) is enough to cause “serious drop-offs in school performance, attention and memory”, and governments should consider later or flexible school start times, said the study’s leader, Tim Olds.

 His survey, of more than 4,000 children aged 9 to 18, found those who slept least did not watch more television but spent their time socializing (相处) with family or friends or listening to music.

“Almost all children get up at 7 or 7:15 — they have to get to school on time,” said Olds. He favors a later start over an earlier finish because he believes organized sports and activities would still consume the latter end of the day.

Olds’research also establishes lack of sleep as a cause of weight gain in children, and a possible source of future problems with depression, anxiety and increased susceptibility (易感性) to illness.

It was already known that overweight children sleep less, but Professor Olds found sleep duration (时长) was strongly linked to weight across the full range of body sizes. The thinnest children sleep 20 minutes more than the obese. This showed being overweight had no specific effect on sleep patterns, and it was more likely that shorter sleep times stimulate (刺激) appetite and make kids hungry.

The US National Sleep Foundation says teenagers aged 13 to 18 need eight to nine hours’ sleep a night. Younger school-aged kids need 9 to 11 hours.

On that basis, Professor Olds said, half of Australian children are under-sleeping on weekdays and a quarter on weekends.

6. The Australian students surveyed don’t sleep enough because they spend more time on the following EXCEPT _____.

A. organized activities and homework

B. communication with friends and family

C. watching television programs

D. enjoying music 

7. What effects does lack of sleep directly have on the students according to the survey?

A. They become overweight but begin to eat less than before.

B. They feel more depressed and anxious about their school work.

C. They are more likely to be affected with illness in the future.

D. They pay less attention in class and their memory declines.

8. Which of the following suggestions did Mr. Olds raise?

A. The students should go to bed earlier to have longer sleeping time.

B. The students should participate less in organized activities.

C. The school should put off the start time in the morning.

D. The school should finish earlier in the afternoon.

9. What does "obese" in the sixth paragraph mean?

A. average      B. fat     C. sleepless   D. overeating

10. Which of the following statements is TRUE?

A. Australian students usually take part in activities in the afternoon.

B. More students are short of sleep on weekends than on weekdays.

C. Being overweight has an effect on the length of the sleeping time.

D. The survey suggests that teenagers need 8-9 hours’ sleep a night.

C

By day he is just a normal cat but when the lights go out, he glows (发光) in the dark.

Scientists have genetically modified (更改) a cat as part of an experiment that could lead to treatments for diseases.

Named Mr. Green Genes, he looks like a six-month-old cat but, under ultraviolet (紫外线的) light, his eyes, gums (牙龈) and tongue glow green. That is the result of a genetic experiment at the Audubon Center for Research of Endangered Species in New Orleans, US.

Mr. Green Genes is the first fluorescent (荧光的) cat in the US and probably the world, said Betsy Dresser, the center's director.

The researchers made him so they could learn whether a gene could be introduced harmlessly into a cat's genetic sequence (次序).

If so, it would be the first step in a process that could lead to the development of ways to treat diseases via gene therapy (治疗).

The gene, which was added to Mr. Green Genes' DNA, has no effect on his health, Ms Dresser said.

Cats are ideal for this project because their genetic makeup is similar to that of humans, said Dr Martha Gomez, a scientist at the center.

To show that the gene went where it was supposed to go, the researchers settled on one that would glow.

The gene "is just a marker",said Leslie Lyons, an assistant professor at the University of California, Davis. Lyons is familiar with the center's work.

 "The glowing part is the fun part," she said.

 Glowing creatures made international news earlier this month when the Nobel Prize in Chemistry was awarded to three scientists who had discovered the gene through their work with jellyfish (水母).

11.Which of the following might be the best title for the passage?

A. A Glowing Cat                  B. Mr. Green Genes

C. One Cat’s Life                  D. An experiment on cats

12. What can we conclude from the passage?

A. Fortunately, scientists have found ways to treat diseases via gene therapy.

B. Scientists think cats’ genetic makeup is the same as that of human beings.

C. Three scientists who had discovered the gene were given Nobel Prize in  Physics.

D. Scientists have managed to introduce a gene into a cat’s genetic sequence.               

13. What does “settled on” most probably mean in Paragraph 9?

A. chose         B. killed        C. took          D. raised

14. From the passage we can see that ____.

A. Mr. Green Genes was made by researchers to treat diseases

B. the cat named Mr. Green Genes can glow when it is dark

C. Mr. Green Genes is the first fluorescent cat in the world

D. Mr. Green Genes is a cat of seven months old up to now

15. Which of the following is WRONG according to the text?

A. The gene added to Mr. Green Genes’ DNA doesn’t affect its health at all.

B. The scientists came up with the idea of the glowing genes totally for fun.

C. Earlier this month glowing creatures became news all through the world.

D. Scientists had discovered the gene from the jellyfish they worked with.

查看答案和解析>>

阅读理解

阅读下列文,从每题所给的ABCD四个选项中,选出最佳答案。

One day newly-wedded (结婚的) Nancy lost her ring when they were busy working in their fields to plant potatoes. Friends were called and the field was searched long but in vain(无效的). Later, when the potatoes were harvested everyone looked out for the ring but it remained lost. Another year came round and all the farmers working in the fields kept their eyes open.

    The following year was the same. And year after year, whoever had business in the fields always had Nancy's ring in his mind.

    Then the farm changed hands but it went to further than to cousins (表兄弟). So the memory of the lost ring remained alive until thirty-eight years had passed. Then came a spring day when a man was plowing (耕地) the field behind a pair of horses. Even after thirty-eight years he still looked out for the ring, and knew just which part of the field Nancy had lost it in. At this time, when he came there, he found it. He picked it up, put it carefully into his pocket, left his horses, and ran all the way down to the village and placed it into Nancy's hand.

1How did Nancy come to lose her ring? She lost it while ________.

    A. helping to plant tomatoes in the fields

    B. watering the plants in the fields

    C. doing some plowing in the fields

    D. gathering potatoes in the fields

2What was done to try and find the lost ring?

    A. Friends were asked to join the search.

    B. The field was searched for a long time.

    C. Dogs were called to look for it.

    D. Both A and B.

3Why did people keep looking for the ring even after the farm changed hands?

    A. It was a very expensive ring.

    B. They all wanted to do something for Nancy.

    C. They all hated Nancy.

    D. Everybody wanted to have this ring.

4What did the ploughman do after finding the ring?

    A. He picked it up and put it in his pocket.

    B. He ran back to tell everybody else in the village.

    C. He placed it to the owner.

    D. He returned if to the owner.

5What can you infer from the passage?

    A. The ring was not valuable.

    B. People on the farm were honest and helpful.

    C. The ring's mysterious disappearance was the work of supernatural power.

D. Nancy no longer expected that her ring would be found again.

 

查看答案和解析>>

阅读理解

阅读下列文,从每题所给的ABCD四个选项中,选出最佳答案。

One day newly-wedded (结婚的) Nancy lost her ring when they were busy working in their fields to plant potatoes. Friends were called and the field was searched long but in vain(无效的). Later, when the potatoes were harvested everyone looked out for the ring but it remained lost. Another year came round and all the farmers working in the fields kept their eyes open.

    The following year was the same. And year after year, whoever had business in the fields always had Nancy's ring in his mind.

    Then the farm changed hands but it went to further than to cousins (表兄弟). So the memory of the lost ring remained alive until thirty-eight years had passed. Then came a spring day when a man was plowing (耕地) the field behind a pair of horses. Even after thirty-eight years he still looked out for the ring, and knew just which part of the field Nancy had lost it in. At this time, when he came there, he found it. He picked it up, put it carefully into his pocket, left his horses, and ran all the way down to the village and placed it into Nancy's hand.

1How did Nancy come to lose her ring? She lost it while ________.

    A. helping to plant tomatoes in the fields

    B. watering the plants in the fields

    C. doing some plowing in the fields

    D. gathering potatoes in the fields

2What was done to try and find the lost ring?

    A. Friends were asked to join the search.

    B. The field was searched for a long time.

    C. Dogs were called to look for it.

    D. Both A and B.

3Why did people keep looking for the ring even after the farm changed hands?

    A. It was a very expensive ring.

    B. They all wanted to do something for Nancy.

    C. They all hated Nancy.

    D. Everybody wanted to have this ring.

4What did the ploughman do after finding the ring?

    A. He picked it up and put it in his pocket.

    B. He ran back to tell everybody else in the village.

    C. He placed it to the owner.

    D. He returned if to the owner.

5What can you infer from the passage?

    A. The ring was not valuable.

    B. People on the farm were honest and helpful.

    C. The ring's mysterious disappearance was the work of supernatural power.

D. Nancy no longer expected that her ring would be found again.

 

查看答案和解析>>

 

阅读下面短文,掌握其大意,然后从各题所给的A、B、C、D 四个选项中,选出最佳选项,。  

  Night after night, my mother came to my bed, even long after my childhood years. She would   1down and push my long hair out of the way, and then kiss my forehead.

    I don’t remember when it first started  2me-her hands pushing my hair that way, for they

felt work-worn and rough  3my young skin. Finally , one night, I shouted out at her, “Don’t do

that any more-your hands are too rough!” she made no  4and left quietly. But never again did

my mother do it with that familiar expression of her  5.

With the passing years, my   6returned to that night time after time. By then I   7my mother’s hands and her goodnight kiss. Sometimes the incident seemed very  8, sometimes far away, but always it was  9in the back of my mind.

The years have passed, and I’m not a little girl any more. Mom is in her seventies, and those hands I once  10to be so rough are still doing things for me and my family.

Now, Mom no longer has Dad and lives  11. One night on Thanksgiving Eve, I found myself  12to her house to spend the night with her. As I slept in the bedroom of my youth, a familiar hand hesitantly ran across my face to  13the hair from my forehead. Then a   14, ever so gently , touched my forehead. I burst into tears.

In my memory, thousands of times, I   15the night my young voice complained. Catching Mom’s hand in hand, I told her how  16I was for that night. I thought she’d remember  17I did. But Mom didn’t know what I was talking about. She had already forgotten and   18long ago.

That night, I fell asleep with a new  19for my gentle mother and her caring hands. And the guilt that I had carried around for so long was   20to be found.  

1.A.lie              B.bend           C.look           D.fall

2.A.annoying         B.astonishing    C.delighting     D.disappointing

3.A.along            B.above          C.against        D.aside

4.A.reply            B.promise        C.request        D.agreement

5.A.pity             B.sadness        C.apology        D.love

6.A.feelings         B.opinions       C.spirits        D.thoughts

7.A.missed           B.forgot         C.held           D.shook

8.A.strange          B.close          C.serious        D.common

9.A.stressed         B.existed        C.hidden         D.exposed

10.A.expected        B.changed        C.reminded       D.complained

11.A.yet             B.away           C.alone          D.long

12.A.drawn           B.carried        C.moved          D.stayed

13.A.cut             B.wash           C.brush          D.take

14.A.tear            B.kiss           C.press          D.hand

15.A.returned        B.remembered     C.realized       D.recalled

16.A.sorry           B.happy          C.angry          D.nervous

17.A.when            B.how            C.why            D.as

18.A.disappeared     B.forgiven       C.apologized     D.abandoned

19.A.imagination     B.inspiration    C.decoration     D.appreciation

20.A.still           B.soon           C.nowhere        D.anyhow

 

查看答案和解析>>


同步练习册答案