相关习题
 0  4614  4622  4628  4632  4638  4640  4644  4650  4652  4658  4664  4668  4670  4674  4680  4682  4688  4692  4694  4698  4700  4704  4706  4708  4709  4710  4712  4713  4714  4716  4718  4722  4724  4728  4730  4734  4740  4742  4748  4752  4754  4758  4764  4770  4772  4778  4782  4784  4790  4794  4800  4808  151629 

科目: 来源: 题型:阅读理解

Say sorry to your wife---it may help her live longer, according to scientists.
“Sorry” may be the hardest word, but scientists say it could be one of the healthiest. Researchers have discovered that women who receive an apology for hurtful behavior suffer less stress and possible damage to their heart than those who don’t.
It is said that the heartbeat of a wronged woman returns to normal 20 percent quicker after a well-timed “sorry” than without it. But for men, their heartbeat takes longer to recover, according to the research.
The research was undertaken by American scientists using 29 men and 59  women whose diastolic blood pressure was measured throughout an experiment. Diastolic blood pressure
is a measure of pressure in the blood vessels( 血管 ) between heartbeats---if it is continuously high it can increase the chances of heart attacks.
The men and women were asked to undertake a difficult mathematical task. They were told they had five minutes to complete it but were disturbed after a minute and told rudely to carry out the task more quickly. They were disturbed twice more before five minutes had passed and told to speed up. Finally they were told, “ You’re obviously not good enough.” Two minutes later researchers said sorry to half of the men and women.
The researchers found that, on average, the women’s diastolic blood pressure dropped back to normal 20 percent---quicker if they received an apology from the researchers, while the men’s took 20 percent longer to return to normal. One of the researchers said, “Results indicates that the effects of apology and forgiveness on women are greater.”

  1. 1.

    The term “sorry” is considered as one of the healthiest words because it _________.

    1. A.
      is the most powerful
    2. B.
      can cure heart disease
    3. C.
      helps people forget hurtful behavior
    4. D.
      can reduce pressure and damage to the heart
  2. 2.

    We can know from Paragraph 3 _________.

    1. A.
      women’s hearts beat faster than men’s
    2. B.
      women are quicker at making apologies
    3. C.
      men can forgive others’mistakes more easily than women
    4. D.
      men stay angry for a longer time than women after receiving an apology
  3. 3.

    Which of the following is the RIGHT time order for events in the study?
    a. Half of them received apologies.
    b. They were disturbed a minute later.
    c. They were told that they weren’t good enough.
    d. They were asked to finish a math task in five minutes.
    e. They were disturbed two more times during the study.

    1. A.
      d-b-c-e-a
    2. B.
      d-c-b-a-e
    3. C.
      d-b-e-c-a
    4. D.
      d-c-b-e-a
  4. 4.

    The research confirmed (证实) that _________.

    1. A.
      men are unwilling to apologize to others for their mistakes
    2. B.
      men’s chances of getting heart attacks are higher than women’s
    3. C.
      women can benefit more from receiving apologies than men
    4. D.
      people can also get healthy benefits from giving apologies

查看答案和解析>>

科目: 来源: 题型:阅读理解

Once when I was six years old I saw an amazing picture in a book called True Stories from Nature about the primeval(原始的)forest. It was a picture of a boa constrictor(大蟒蛇) in the act of swallowing an animal. In the book it said:“Boa constrictors swallow their prey whole without chewing(嚼)it. After that they are not able to move and they sleep through the six months that they need for digestion(消化).”
I thought deeply then over the adventures of the jungle. And after some work with a colored pencil I succeeded in making my first drawing. My Drawing Number One. I showed my work to the grown-ups and asked them whether the drawing frightened them. But they answered:“Frighten? Why should anyone be frightened by a hat?”
My drawing was not a picture of a hat. It was a picture of a boa constrictor digesting an elephant. But since the grown-ups were not able to understand it, I made another drawing. I drew the inside of the boa constrictor so that the grown-ups could see it clearly. They always need to have things explained. That's my Drawing Number Two.
The grown-ups' response this time was to advise me to lay aside my drawings of ba constrictors whether from the inside or the outside and devote myself instead to geography, history, arithmetic and grammar. That is why at the age of six I gave up what might have been a great painter. I had been disheartened by the failure of my Drawing Number One and my Drawing Number Two. Grown-ups never understand anything by themselves and it is tiresome for children to be always and forever explaining things to them.
So then I chose another profession(职业) and learned to pilot airplanes. I have flown a little over all parts of the world; and it is true that geography has been very useful to me. At a glance I can distinguish China from Arizona. If one gets lost in the night, such knowledge is valuable.
In the course of this life I have had lots of chances to meet with a great many people. And that hasn't much improved my opinion of them. Whenever I met one of them who seemed to me at all clear-sighted, I tried showing him my Drawing Number One which I have always kept. I would try to find out if this was a person of true understanding. But whoever it was, he or she would always say: That is a hat. Then I would never talk to that person about boa constrictors or primeval forests or stars. I would bring myself down to his level. I would talk to him about bridge and golf and politics and neckties. And the grown-up would be greatly pleased to have met such an intelligent man.

  1. 1.

    The writer drew his first picture in order to ________.

    1. A.
      show the grown-ups what the book was about
    2. B.
      frighten the grown-ups trying to enter the forest
    3. C.
      remind himself of the adventures of the jungle
    4. D.
      illustrate(说明)a boa constrictor's act of digesting an animal
  2. 2.

    How did the writer understand the grown-ups' response to his second drawing?

    1. A.
      He was actually only good at academic study.
    2. B.
      It was a waste of time for him to keep on drawing.
    3. C.
      He had difficulty in communicating with the adults.
    4. D.
      He was good at anything but geography.
  3. 3.

    The underlined word disheartened in Paragraph 4 could most probably be replaced by ________.

    1. A.
      discouraged
    2. B.
      dissatisfied
    3. C.
      discovered
    4. D.
      disturbed
  4. 4.

    Which of the following statements is true?

    1. A.
      The writer could have become a pilot if encouraged when young.
    2. B.
      The writer finally changed his opinion of grown-ups.
    3. C.
      The writer has been showing his two pictures to others ever since.
    4. D.
      The writer felt nobody could have really understood him.

查看答案和解析>>

科目: 来源: 题型:阅读理解

A speech is a wonderful opportunity to inform, persuade or entertain. The best speeches often take on a combination of all three of these components(组成部分). However, before you can go about the writing of a great speech, it is important to set goals. Goals keep you,your speech and your audience focused.
What a goal is
In the context of a speech, a goal is the purpose of the speech, and what it hopes to accomplish. For example, the goal of a eulogy(颂歌) might be to celebrate the life of a loved one. The goal of a speech at a political gathering would be to inform the crowd about the political position of a candidate and persuade them to vote and campaign for the candidate in question(正被讨论的).
Why a goal is important
Without a goal, a speech is without direction. The goal informs the structure and content of the speech. For example, if a speech's goal is to convince people that smoking is bad for them, the speech will be structured with persuasive arguments to back up the goal. A speech with a goal of informing the audience will keep the information fair and factual.
A goal is incredibly important to the speech's ability to connect with an audience. If the speaker is unaware of the goal of the speech, the audience will likely be unaware as well. This severely reduces the effectiveness of the message.
Aside from informing the audience of the content and structure, a speech's goal drives the speaker to greater heights. If a speaker is asked to speak on a specific subject, but never establishes the goal, they won't know where to start in the research, organizing and writing of the speech.
______________
If you have been charged with(被委以) delivering a speech, establishing a goal can seem difficult at first. There are several things to take into consideration. First, think about who you will be speaking to. The demographic(人口统计) of your audience will likely determine whether you will be able to persuade them, or whether they will be able to sit through(一直坐到……结束). Second, think about the topic itself. If the topic is something controversial(有争议的), it may worth your while to consider an informative approach to present both sides of the issue. Finally, consider your resources. A speech with an informative or persuasive goal usually requires a great deal of research, and sometimes takes more time to write.

  1. 1.

    According to the passage, what three components does the best speech combine?

    1. A.
      Informing, delivering and entertaining.
    2. B.
      Informing, persuading and entertaining.
    3. C.
      Informing, writing and delivering.
    4. D.
      Informing, writing and persuading.
  2. 2.

    The goal of a speech at a political gathering might be ________.

    1. A.
      to persuade the audience to vote for a candidate
    2. B.
      to celebrate the life of a person you admire
    3. C.
      to entertain the audience with humor and magic
    4. D.
      to persuade the audience to buy new products
  3. 3.

    All the following indicate the importance of a speech goal EXCEPT that ________.

    1. A.
      a speech will lose its direction without a goal
    2. B.
      a speech goal can help keep the audience aware of the speech
    3. C.
      a speech goal can help the speaker know about the research, organizing and writing
    4. D.
      a speech goal makes it possible for the speaker to achieve whatever he wants in life
  4. 4.

    Which of the following can be filled into the blank as the subtitle for the last paragraph?

    1. A.
      How to achieve a speech goal
    2. B.
      How to deliver a difficult speech
    3. C.
      What to consider to establish a goal
    4. D.
      What to consider to deliver a speech

查看答案和解析>>

科目: 来源: 题型:阅读理解

In today’s Internet age, online games can be a change from the pressure of school and work. However, they can also cause problems and unhealthy addictions. This is most clearly seen in the example of South Korea. This country has the world’s highest percentage of high – speed Internet services. It has also a high number of game players who are addicted to online games.
In 2004, a young man died after playing online games almost nonstop for 86 hours. A 12 – year – old boy stole $ 16,000 from his father to continue online games which he could not get away from. Such problems are spreading to other parts of Asia as well. In 2005, it was reported that about 80 percent of China’s 13.8 million online game players were under 25. And many of these were said to be addicted. Such numbers point toward a growing problem among Chinese youth.
Dr. Sue – Huei Chen, a psychologist , discovered some signs of at – risk people. Such people often go online to escape from their problems. And they usually have no friendship or good social skills. They feel the need to spend more and more time online, so they may be absent from school or family. And they become upset if anyone tries to limit their online game playing.

  1. 1.

    The passage is mainly about          .

    1. A.
      online games
    2. B.
      problems caused by online games
    3. C.
      computer problems in Asia
    4. D.
      problems caused by young people
  2. 2.

    In the passage, the writer tells us a fact that         .

    1. A.
      South Korea has a large number of Internet schools
    2. B.
      More and more young men are stealing money for online games
    3. C.
      China’s online game players are all under the age of 25
    4. D.
      Online game addiction is a very common problem in South Korea
  3. 3.

    After reading the passage, we know that in China         .

    1. A.
      many young people are playing online games for fun
    2. B.
      many young people are getting addicted to online games
    3. C.
      only those under 25 like to play online games for long periods
    4. D.
      80 percent of the Chinese depend on online games to get relaxed
  4. 4.

    According to the passage,      are more likely to become addicted to online games.

    1. A.
      people under great pressure from school and work.
    2. B.
      people well known in the field of computer games
    3. C.
      people with unsolved problems and few friends
    4. D.
      people who’d like to take a risk in computer games

查看答案和解析>>

科目: 来源: 题型:阅读理解

American cities are similar to other cities around the world; In every country. Cities reflect the values of the culture. American cities are changing, just as American society is changing.
After Wolld Wa Ⅱ,the population of most large American cities decreased; bowever. The populaton In omthe Sun Belt cities increased. Los Angeles and Houston are eitit where populatfon shife(转移)to and from the oity reflect the changing values of Amorican society. In the late 1940s and early 1950s,city residents(居民)became wealthier. They had more children so they needed more space, They moved out of their apartments in the city to buy their own homes. They bought houses in the suburbs(郊区).
Now things are changing. The children of the people who left the cities in the 1950s are now adults. Many, unlike their parents, want to live in the cities. They continue to move to Sun Belt cities and older ones of the Northeast and Midwest. Many young professionals are moving back into city. They prefer the city to the burbs because their jobs are there; or they jus enjoy the excitement and possibii that the city offers.
his  people     shift is bringing problems as well as benefits. Countless poot people  must leave  their apartments in the city because the owners want to sell the buildings or make apartments for sale instead of for rent. In the 1950s, many poor people did not have enough money to move to the suburbs; now many of these same people do not have enough money to stay in the cities.
Only a few years ago, people though that the older  American cities were dying. Some city residents now see a bright,  new fiture,  Others see only problems and comfiels the thing is sure many dying cities are alive again.

  1. 1.

    What does the author  think of cities all over the world?

    1. A.
      They are alive.                       
    2. B.
      They are hopeless.
    3. C.
      They are similar.                           
    4. D.
      They are different.
  2. 2.

    Why did American city residents want to live in the suburbs after World War Ⅱ?

    1. A.
      Because older American cities were dying.
    2. B.
      Because they were richer and needed more space.
    3. C.
      Because cities contained the wont pare of society.
    4. D.
      Because they could hardly afford a live in the city.
  3. 3.

    According to the 4th paragraph, a great many poor people in American cities_________.

    1. A.
      are faced with housing problems
    2. B.
      are forced to move to the suburbs
    3. C.
      want to sell their buildings
    4. D.
      need more money for daily expenses
  4. 4.

    We ear comude  from the text that ________.

    1. A.
      American cities are changing far the worse
    2. B.
      people have different views on American cities
    3. C.
      many people are now moving from American cities
    4. D.
      the population is decreasing in older American cities

查看答案和解析>>

科目: 来源: 题型:阅读理解

A new study suggests that the way to weight loss may be clear.A couple of glasses of water before meals help dieters lose about 5 pounds more than those who do not drink water.While drinking water before a meal may fill a person up,the contents of their meal are important as well.Should a person be eating a low-fat diet or a lowcarbohydrate (低糖的) diet? Or does it matter at all?
Recent research suggests that one diet isn’t any better than the other.A few weeks before the water study,another concluded that lowfat and lowcarbohydrate diets tied in weight loss.While the lowcarbohydrate dieters did show a slight increase in good cholesterol (胆固醇) and a reduction in blood pressure,there was not much difference in the dieters’weight loss.The point here is that the person had to stick to the diet.What helps a person see a diet through? It could be body type.
A study published in the Journal of the American Medical Association,as reported by Timemagazine,found that body shape is the key to which diet a person will be able to stick with.Apples are people who carry most of their weight above the belt,while pears carry their weight around their hips (臀部).Apple types were more likely to be highinsulin secretors (高胰岛素分泌者) who respond more strongly to carbohydrates in their bodies.They lost the most weight on a lowcarbohydrate diet.Pears were lowinsulin secretors who lost the same amount of weight on both diets.Unstable (不稳定的) insulin levels can create stronger hunger senses,causing the apple types to go off their diet plans.
All of these studies again come down to choosing the diet that helps you eat less.The bodytype diet does make some sense as men are more likely to be apple types,with larger stomachs,and tend to do well on higherprotein diets,while women,who tend to carry weight around their hips,find themselves drawn to the lowfat diets.The reality is if a diet is failing you try another one.A plan you can’t,or won’t,stick to will never work,no matter what the research says

  1. 1.

    If you want to lose weight but don’t know what diet suits you,you can always ________

    1. A.
      drink a few cups of water after each meal
    2. B.
      drink a few cups of water before each meal
    3. C.
      eat plenty of pears
    4. D.
      eat plenty of apples
  2. 2.

    Compared with a lowcarbohydrate dieter,a lowfat dieter may ________

    1. A.
      lose weight faster
    2. B.
      put on weight faster
    3. C.
      have less good cholesterol
    4. D.
      have a lower blood pressure
  3. 3.

    Which of the following statements is TRUE according to the passage?

    1. A.
      Women on highprotein diets usually do well in weight loss
    2. B.
      Men on highcarbohydrate diets usually do well in weight loss
    3. C.
      Men usually like eating apples while women mostly enjoy pears
    4. D.
      Whether a person can stick with a diet depends largely on his or her body shape
  4. 4.

    In the author’s opinion,________

    1. A.
      men don’t get hungry as easily as women
    2. B.
      apple types work better than pear types in weight loss
    3. C.
      the result of the recent research is not of much value
    4. D.
      strong will as well as proper methods is the key to weight loss

查看答案和解析>>

科目: 来源: 题型:阅读理解

It was almost four o’clock in the morning when the fire broke out.“We watch one window blow out,and then another,and heard people shouting,”says Stanley,21,a junior from Westfield State College in Massachusetts.Students were throwing ropes made from bed sheets out their windows,and a couple of them were trying to climb down.
Almost all the hotel’s 502 rooms were filled with college students from across the United States who were spending their holiday here in Acpulco,Mexico.As the smoke thickened,Moreno ran upstairs to where other Westfield students were rooming.“Some people had no idea what was going on,”he says.“I was shouting at the top of my voice.I made sure I hit every door.”At the same time,Stanley was downstairs helping people get through the smoke­filled hall.There he joined forces with Nalewanski who had just come back from his own night out.
“Let’s go.”Nalewanski says.He and Stanley wet their shirts in the bathroom and wrapped them around their mouths and noses so they could breathe.Then they ran up the stairs.
Nalewanski and Stanley found Moreno on the fourth floor.They all ran upstairs and down the corridors(走廊) on every floor,hitting every door hard.
In the end,no one was seriously injured.Even more unbelievable,all the Westfield students made it back to Massachusetts later that same day.
Westfield president Evan Dobelle says,“I have a great deal of pride in these young men and they were able to react in such an emergency.”

  1. 1.

    What’s the best title for this passage?

    1. A.
      College students have a terrible holiday
    2. B.
      College students survived a big fire
    3. C.
      Heroes:close call in a hotel fire
    4. D.
      A big fire broke out in a hotel
  2. 2.

    What do we learn from Stanley from the passage?

    1. A.
      He is in his last year in college.
    2. B.
      He is a very brave young man.
    3. C.
      He was reading a book when the fire broke out.
    4. D.
      He was the first one to find out there was a fire.
  3. 3.

    According to the passage ________ might not have woken up people during the fire.

    1. A.
      Evan Dobelle
    2. B.
      Nalewanski
    3. C.
      Stanley
    4. D.
      Moreno
  4. 4.

    The students helped people out through all of the following ways EXCEPT ________.

    1. A.
      helping people get through the hall
    2. B.
      shouting loudly to warn people
    3. C.
      hitting doors to wake people up
    4. D.
      Making ropes for people to climb down

查看答案和解析>>

科目: 来源: 题型:阅读理解

The area of child psychology is one of the most significant and well studied of all the branches of psychology. It aims to help with achieving a greater understanding of the behavior of children through an understanding of their minds. It deals with children who range from the prenatal(出生前的)stage right up to the stage of adolescence.
The psychologist Jean Piaget (1896-1980) has been credited with making a major breakthrough in this area when he put forward his idea that children were not actually less intelligent than adults, rather they just thought in a different way. Preciously the development of children right from birth through to adulthood was an area that was almost completely neglected. In fact very little work was done in this area. However, interest in this field has now developed to the point of being one of the most debated of all the areas of psychology.
Despite popular belief that factors such as genetics or personal characteristics are the only determining factors that influence a youth’s behavior, this is not in fact the case. In reality, development actually includes many more factors than those contained within an individual. Factors such as environment, which can include social relationships and the surrounding culture, also play important roles. Relationships with both peers and adults will no doubt affect how children think and learn, and therefore develop. These relationships can include those that are found not only within families but also in schools and peer groups.
Culturally speaking, this factor will contribute greatly to how children develop their personality concerning the values they end up holding (perhaps for a lifetime) as well as how they view such things as traditions and customs.
Nowadays, psychologists have agreed that a child’s psychology is both unique and highly complex. However, there are debates on many different points in this field and many viewpoints exist.

  1. 1.

    The word “neglected” underlined in Paragraph 2 can be replaced by “______”.

    1. A.
      ignored
    2. B.
      destroyed
    3. C.
      developed
    4. D.
      explored
  2. 2.

    What does the third paragraph mainly tell us?

    1. A.
      Popular belief about child psychology.
    2. B.
      The role families play in a child’s development.
    3. C.
      Factors that affect a child’s development.
    4. D.
      The importance of relationships to a child.
  3. 3.

    The author’s purpose in writing the passage is to ____.

    1. A.
      introduce an important psychologist.
    2. B.
      give a brief introduction to child psychology.
    3. C.
      compare some of the areas of psychology.
    4. D.
      explain the development in psychology.

查看答案和解析>>

科目: 来源: 题型:阅读理解

Aquatic Adventures!
Help Us Get Ready for Showtime!
Trainer Program
What does it take to work with seals or sea lions? Find out with Atlantis Marine World’s Trainer Program and go behind the scenes with our Marine Mammal staff and:
﹒Learn how we train our animals and help train our sea lions to learn how to paint
﹒Go into the seal exhibit with trainers
﹒Join in a seal training period - and get to pet and feed one of our harbor seals
﹒Help prepare food for seals
﹒Attend our Sea Lion Show
﹒Get a kiss from sea lion, Java – and take home a photo
Summer Adventure Days – Camp! Atlantis Style!
Our camp program adds interactive excitement to your child’s summer vacation. Children ages 3 to 14 discover the wonders of the sea environment through age – appropriate activities.
Pirate Snorkel Adventure
Yo-ho-ho, this is a whole lot of fun! Join us this summer for our interactive Pirate Snorkel Adventure and help Captain Poseidon locate missing treasure. While searching our lake, don’t miss tropical fish from all around the world. When you’re done, you’ll walk away with some booty (战利品) of your own – a $2.00 game card and a pirate eye patch (海盗眼罩)  featuring our very own Jolly Poseidon!
Smooth Sailing: Taste Long Island Wine Cruise Now Accepting Reservations!
Experience the magic of Taste Long Island, a Saturday evening wine and cheese cruise aboard the Atlantis Explorer Tour Boat. Featuring local wines, this adventure along the Peconic River is a relaxing way to enjoy both beautiful scenery and fine wines. Guests 21 and older only. Members and Green Key Cardholders enjoy 25% off.

  1. 1.

    If you attend Atlantis Marine World’s Trainer Program, you can _____.

    1. A.
      watch the performance of sea lions.
    2. B.
      learn how to paint sea lions.
    3. C.
      get a chance to kiss sea lions.
    4. D.
      help prepare a seal exhibit.
  2. 2.

    The activities in Summer Adventure Days are divided according to ____.

    1. A.
      children’s hobby.
    2. B.
      children’s age.
    3. C.
      the price.
    4. D.
      the type of sea animals
  3. 3.

    In which activity will you get something as a reward?

    1. A.
      Atlantis Marine World’s Trainer Program.
    2. B.
      Summer Adventure Days.
    3. C.
      Pirate Snorkel Adventure.
    4. D.
      Smooth Sailing.
  4. 4.

    What is special about Smooth Sailing?

    1. A.
      Guests under 21 cannot be accepted.
    2. B.
      It provides famous wines from all over the world.
    3. C.
      Guests usually get a discount.
    4. D.
      It doesn’t accept bookings.

查看答案和解析>>

科目: 来源: 题型:阅读理解

Louis Armstrong had two famous nicknames (绰号). Some people called him Bagamo. They said his mouth looked like a large bag. Musicians often called him Pops, as a sign of respect for his influence (影响) on the world of music .
Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz was invented in the city a few years before his birth. Armstrong often said,” Jazz and I grew up together.”
Armstrong showed a great talent (天赋) for music when he was taught to play the cornet (短号) at a boy’s home. In his late teens, Armstrong began to live the life of a musician. He played in parades, clubs, and on the steamboats that traveled on the Mississippi River. At that time, New Orleans was famous for the new music of jazz and was home to many great musicians. Armstrong learned from the older musicians and soon became respected as their equal.
In 1922 he went to Chicago. There, the tale of Louis Armstrong began. From then until the end of his life, Armstrong was celebrated and loved wherever he went. Armstrong had no equal when it came to playing the American popular song.
His cornet playing had a deep humanity (仁爱) and warmth that caused many listeners to say, “Listening to Pops just makes you feel good all over.” He was the father of the jazz style (风格) and also one of the best-known and most admired people in the world. His death, on July 6, 1971, was headline news around the world

  1. 1.

    Armstrong was called Pops because he______.

    1. A.
      looked like a musician
    2. B.
      traveled to play modern music
    3. C.
      showed an interest in music
    4. D.
      was a musician of much influence
  2. 2.

    The third paragraph is developed ______.

    1. A.
      by time
    2. B.
      by examples
    3. C.
      by space
    4. D.
      by comparison
  3. 3.

    Which statement about Armstrong is true?

    1. A.
      His tale began in New Orleans
    2. B.
      His music was popular with his listeners
    3. C.
      He was born before jazz was invented
    4. D.
      He learned popular music at a boy’s home
  4. 4.

    Which would be the best title for the text?

    1. A.
      The Father of the Jazz Style
    2. B.
      The Making of a Musician
    3. C.
      The Spread of Popular Music
    4. D.
      The Invention of the Jazz Music

查看答案和解析>>

同步练习册答案