Due to climate change, Arctic ice is breaking up earlier in the spring, and its area is decreasing. This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay.
Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean. But as the ice has melted, the polar bears have been forced to spend more time on land. There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters. For polar bears, this food is less nutritious than seals that they normally catch on ice sheets. The shrinking（減少） ice has also forced more polar bears into the ocean. In the past, they only had to swim short distances between ice sheets. But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean. This poses a severe danger during rough weather, and an increasing number of drowned polar bears have been observed.
In Hudson Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago. Polar bears on Hudson Bay fast（絕食） during the summer, waiting for ice to form in the fall to hunt. Every year, the summer gets longer, and the bears get skinnier. Over the past 25 years, the average weight of the female bears has dropped 68 kg. This loss affects their ability to reproduce, and already the number of births has dropped 15 percent. Unless the bears can learn to survive these climate changes, these giants of the ice may one day disappear.

  1. 1.

    What is Arctic ice doing earlier each year?

    1. A.
      It’s freezing.
    2. B.
      It’s hardening.
    3. C.
      It’s melting.
    4. D.
      It’s expanding.
  2. 2.

    What is true of polar bears that are spending more time on land in Alaska?

    1. A.
      Their young are dying.
    2. B.
      Their diet is changing.
    3. C.
      Their health is improving.
    4. D.
      Their families are growing.
  3. 3.

    What do polar bears in Hudson Bay do during the summer?

    1. A.
      They claim territory(地域).
    2. B.
      They protect mates.
    3. C.
      They hunt animals.
    4. D.
      They stop feeding
  4. 4.

    In which publication would you most likely find this passage?

    1. A.
      Medical News
    2. B.
      Society Today
    3. C.
      Wildlife Journal
    4. D.
      Design Magazine
CBDC
文章介紹了冰融化以后，北極熊得生活受到了很大的影響。
1.細(xì)節(jié)題。根據(jù)文章第一段可知冰在不停地融化。
2.推理題。根據(jù)文章第2段3,4行There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters.可知B正確。
3.細(xì)節(jié)題。根據(jù)第3段2,3行Polar bears on Hudson Bay fast（絕食） during the summer, waiting for ice to form in the fall to hunt.
4.推理題。根據(jù)文章內(nèi)容可知是關(guān)于野生動(dòng)物的情況介紹。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：單選題

Not until the stadium of Bird’s nest was completed in the end _______ back to their normal position


  1. A.
    did our hearts got
  2. B.
    did our hearts get
  3. C.
    our hearts got
  4. D.
    our hearts did get

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：單選題

She____much younger than she really is


  1. A.
    turns
  2. B.
    becomes
  3. C.
    grows
  4. D.
    appears

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

Our listener question this week comes from Abdullahi Farah, who wants to know about the life and work of Doctor Benjamin Carson.
Doctor Carson is an internationally recognized doctor at Johns Hopkins Hospital in Baltimore, Maryland. He has been the director of Pediatric Neurosurgery at the hospital for twenty-five years. At the age of thirty-three, he became one of the youngest doctors in the United States to hold that position. And he was the first African-American to have that position at Johns Hopkins Hospital.
Ben Carson is known for his work as a brain surgeon for children. For example, in nineteen eighty-seven, he led a team of seventy doctors and nurses in an operation to separate two babies joined at the head. Earlier attempts by other surgeons on other babies had failed. Doctor Carson successfully performed the operation. Both babies were able to survive independently.
Doctor Carson has written four books. His first book, "Gifted Hands," tells the story of his life. Benjamin Carson was born in nineteen fifty-one in Detroit, Michigan.
As a boy, Ben was not a good student. In fact, he was the worst in his class. When his mother learned of his failing grades she asked her sons to read two library books every week. She limited the amount of time they watched television. And she told them to respect every person.
Ben Carson soon became the top student in his class. He went on to study at Yale University, one of the best universities in the country, and later to medical school at the University of Michigan.
Doctor Carson has received many awards and honors. Last year he received the nation's highest civilian honor. Former President George W. Bush presented Benjamin Carson with the Presidential Medal of Freedom at a ceremony at the White House.

  1. 1.

    The passage is probably taken from _____.

    1. A.
      a radio
    2. B.
      a magazine
    3. C.
      TV
    4. D.
      a paper
  2. 2.

    What does the word “surgeons” in paragraph 3 mean?

    1. A.
      nurses
    2. B.
      doctors
    3. C.
      hospitals
    4. D.
      points
  3. 3.

    Benjamin Carson’s change in study was largely because of ______

    1. A.
      his hard work
    2. B.
      his teacher
    3. C.
      his mother
    4. D.
      his father
  4. 4.

    What’s the aim to write the passage?

    1. A.
      To call on us to learn from Benjamin Carson.
    2. B.
      To praise Benjamin Carson for his achievements.
    3. C.
      To show us how Benjamin Carson succeeded
    4. D.
      To introduce Benjamin Carson’s life and work

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

A few years ago, Paul Gerner began to gather a group of architects in Las Vegas to ask them what it would take to design a public school that used 50 percent less energy, cost much less to build and obviously improved student learning. “I think half of them fell off their chairs,” Gerner says.
Gerner manages school facilities （設(shè)施） for Clark County, Nevada, a district roughly the size of Massachusetts. By 2018, 143,000 additional students will enter the already crowded public-education system. Gerner needs 73 new schools to house them. Four architecture teams have nearly finished designing primary school prototypes （樣品）; they plan to construct their schools starting in 2009. The district will then assess how well the schools perform, and three winners will copy those designs in 50 to 70 new buildings.
Green schools are appearing all over, but in Clark County, which stands out for its vastness, such aggressive targets are difficult because design requirements like more natural light for students go against the realities of a desert climate. “One of the biggest challenges is getting the right site orientation （朝向）,”Mark McGinty, a director at SH Architecture, says. His firm recently completed a high school in Las Vegas. “You have the same building, same set of windows, but if its orientation is incorrect and it faces the sun, it will be really expensive to cool.”
Surprisingly, the man responsible for one of the most progressive green-design competitions has doubts about ideas of eco-friendly buildings. “I don’t believe in the new green religion,” Gerner says. “Some of the building technologies that you get are impractical. I’m interested in those that work.” But he wouldn’t mind if some green features inspire students. He says he hopes to set up green energy systems that allow them to learn about the process of harvesting wind and solar power. “You never know what’s going to start the interest of a child to study math and science,” he says.

  1. 1.

    How did the architects react to Gerner’s design requirements?

    1. A.
      They lost balance in excitement.
    2. B.
      They showed strong disbelief.
    3. C.
      They expressed little interest.
    4. D.
      They burst into cheers.
  2. 2.

    Which order of steps is followed in carrying out the project?

    1. A.
      Assessment — Prototype — Design — Construction.
    2. B.
      Assessment — Design — Prototype — Construction.
    3. C.
      Design — Assessment — Prototype — Construction.
    4. D.
      Design — Prototype — Assessment — Construction.
  3. 3.

    What makes it difficult to build green schools in Clark County?

    1. A.
      The large size.
    2. B.
      Limited facilities.
    3. C.
      The desert climate.
    4. D.
      Poor natural resources.
  4. 4.

    What does Gerner think of the ideas of green schools?

    1. A.
      They are questionable.
    2. B.
      They are out of date.
    3. C.
      They are advanced.
    4. D.
      They are practical.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

Fun is, in fact, a word heard far more frequently in families today than in the past, when "duty’’ and "responsibility" were often the words used.
Parents today are more youthful in appearance and attitudes. Their clothes and hair-styles are more casual, helping to bridge the divide. Those who are athletically inclined also enjoy Rollerblading, snowboarding, and rock-climbing with their children.
For the past three years, Kathy and Phil Dalby have spent at least one evening a week at a climbing gym with their three children. "It’s great to be able to work together," Mrs Dalby says. "We discuss various climbs and where the hard parts are. Sometimes that leads to other Conversations. We’re definitely closer."
A popular movement of parent effectiveness training in the 1970s has helped to reshape generational roles. The philosophy encourages children to describe their feelings about various situations. As a result, says Robert Billingham, a family-studies professor at Indiana University, "Parents and children began talking to each other in ways they had not before."
On the plus side, he adds, these conversations made parents realize that children may have important thoughts or feelings that adults need to be aware of.
But Professor Billingham also sees a downside: Many parents started making decisions based on what their child wanted. "The power shifted to children. Parents said, ’I have to focus on making my child happy’, as opposed to ’I have to act as a parent most appropriately’."
Other changes are occurring as the ranks of working mothers grow.  Time-short parents encourage children’s independence, making them more responsible for themselves. "They’ll say, ’We trust you to make the right decisions’ (whether they’re ready to assume the responsibility or not) ,"says Billingham.
The self-esteem movement of the past quarter-century has also affected the family dynamics (原動(dòng)力). Some parents worry that if they tell their child no, it will hurt the child’s self-esteem

  1. 1.

    What’s the trend in parent-child relationship mentioned in the passage?

    1. A.
      Parents are chasing after fashion and ignoring the feelings of their children
    2. B.
      More parents and children are sharing the same enthusiasm for a certain sport
    3. C.
      Parents are taking more responsibility and setting more limits for their children
    4. D.
      The generation gap is narrowing and parents are respecting their children’s thoughts more
  2. 2.

    Which of the following has NOT contributed to the change in the parent-child relationship?

    1. A.
      Younger parents
    2. B.
      Parent effectiveness training
    3. C.
      More working mothers
    4. D.
      The self-esteem movement
  3. 3.

    What’s Billingham’s attitude towards parents who make children more responsible for themselves?

    1. A.
      He supports them
    2. B.
      He admires them
    3. C.
      He disagrees with them
    4. D.
      He thinks they’re unreasonable
  4. 4.

    What will probably be discussed following the last paragraph?

    1. A.
      The effect of more working mothers on children’ s education
    2. B.
      The benefits of the new relationship between parents and children
    3. C.
      The importance of self-esteem and ways to develop children’s self-esteem
    4. D.
      The risks of setting no rules and some suggestions on how to have a balanced attitude
  5. 5.

    What’s the best title for the text?

    1. A.
      Parents and Children as Friends
    2. B.
      Parents and Professors as Debaters
    3. C.
      Growing Mutual Understanding
    4. D.
      Disappearing Responsibility

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：單選題

I still can’t believe my eyes when I remember the scene________the best player should miss the pass.


  1. A.
    that
  2. B.
    which
  3. C.
    where
  4. D.
    how

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

In the early days of the internet, many people worried that as people in the rich world embraced new computing and communications technologies, people in the poor world would be left stranded on the wrong side of a "digital divide." Yet the debate over the digital divide is founded on a myth that plugging poor countries into the internet will help them to become rich rapidly.
This is highly unlikely, because the digital divide is not a problem in itself, but a symptom of deeper, more important divides: of income, development and literacy（識(shí)字）. Fewer people in poor countries than in rich ones own computers and have access to the internet simply because they are too poor, are illiterate, or have other more immediate concerns, such as food, health care and security. So even if it were possible to wave a magic wand（棒） and cause a computer to appear in every household on earth, it would not achieve very much: a computer is not useful if you have no food or electricity and cannot read. Yet such Wand-waving - through the construction of specific local infrastructure（基礎(chǔ)設(shè)施） projects such as rural tele-centers--is just the sort of thing for which the UN's new fund is intended.
This sort of thing is the wrong way to go about addressing the inequality in access to digital technologies: it is treating the symptoms, rather than the underlying（下面） causes. The benefits of building rural computing centers, for example, are unclear. Rather than trying to close the divide for the sake of it, the more sensible goal is to determine how best to use technology to promote bottom-up development. And the answer to that question turns out to be remarkably clear: by promoting the spread not of PCs and the Internet, but of mobile phones.

  1. 1.

    What is the main idea of this passage?

    1. A.
      Plugging poor countries into the Internet will help them to become rich rapidly.
    2. B.
      Poor countries should be given more basic devices other than advanced ones.
    3. C.
      Rich countries should help poor ones become rich.
    4. D.
      People in poor countries cannot afford devices such as computer.
  2. 2.

    What did the author mean by referring "digital divide." (Line 3, Para. 1)?

    1. A.
      Digital technology will make the gap between rich world and poor world wider.
    2. B.
      Digital technology will divide people into rich and poor world.
    3. C.
      People can be divided digitally.
    4. D.
      To divide people in digital world is wrong.
  3. 3.

    We can infer from the 2nd paragraph that_______.

    1. A.
      people in poor countries cannot use computer because of illiteracy.
    2. B.
      poor people cannot use computers.
    3. C.
      there would be no magic to cause a computer to appear in every household on earth.
    4. D.
      people in poor countries need more basic living conditions than computers.
  4. 4.

    Considering the following sentences, which one would the author most agree?

    1. A.
      Digital technology is useless.
    2. B.
      Digital divide will help poor countries become rich.
    3. C.
      Poor people need more immediate concerns, such as food, health care and security.
    4. D.
      Mobile phones should be promoted firstly. 
  5. 5.

    The following passage will probably be:

    1. A.
      How to promote using of mobile phones.
    2. B.
      How to use technology to promote bottom-up development.
    3. C.
      The benefits of building rural computing centers.
    4. D.
      How to meet the need of food, health and security in poor countries.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

A person steps on what seems like solid ground but discovers with horror that the ground is giving way underfoot. The person struggles desperately but is trapped. There is no escape. Slowly the person sinks deeper and at last is gone. The solid ground was solid only in appearance. It was actually quicksand, which is a deep mass of fine sand mixed with water.
How is quicksand formed? Water pushes up from below the surface and is held by the sand. The grains of sand are forced apart by the water. They cannot hold any weight. The subsurface water may have come from a spring, a river, or a stream. Sometimes pools of water near beaches become filled with sand. When the soil under these pools does not allow for good drainage(排水), the sand can become stretches of quicksand.
Is it true that a person who steps into quicksand is doomed to die? No, for people have fought their way from quicksand to firm land again. It is panic(恐慌) that creates the condition that can result in death, for the more a person struggles, the worse matters become. Quick movements will make the sand yield for a time, but then it rushes back and settles solidly around the body.
People trapped in quicksand should either lie back with arms outstretched, or not move at all. When the weight of the sand around his body has displaced equals that person’s weight, the victim will stop sinking. With feet held still, and with slow movements of the arms, as in the backstroke(仰泳) in swimming, people have managed to roll to safety and reach firm ground.

  1. 1.

    Quick movements by a person trapped in quicksand will _______.

    1. A.
      help the person reach firm ground
    2. B.
      help prevent panic
    3. C.
      make the same sand yield temporarily
    4. D.
      make the sand hold the person’s weight
  2. 2.

    Quicksand is _______.

    1. A.
      a mass of fine sand mixed with water
    2. B.
      formed only along rivers
    3. C.
      found below subsurface water
    4. D.
      solid ground
  3. 3.

    Which statement does the article lead you to believe?

    1. A.
      Stretches of quicksand are found only under the sea.
    2. B.
      People should never try to escape from quicksand.
    3. C.
      It is hard to keep calm if you fall into quicksand.
    4. D.
      Only heavy people can be trapped in quicksand.
  4. 4.

    The passage mainly tells about _______.

    1. A.
      what solid ground looks like
    2. B.
      the nature of quicksand
    3. C.
      stepping into quicksand
    4. D.
      escaping from quicksand

查看答案和解析>>

同步練習(xí)冊(cè)答案