相關(guān)習(xí)題
 0  100304  100312  100318  100322  100328  100330  100334  100340  100342  100348  100354  100358  100360  100364  100370  100372  100378  100382  100384  100388  100390  100394  100396  100398  100399  100400  100402  100403  100404  100406  100408  100412  100414  100418  100420  100424  100430  100432  100438  100442  100444  100448  100454  100460  100462  100468  100472  100474  100480  100484  100490  100498  151629 

科目: 來源:不詳 題型:閱讀理解


B
I’ve just done my first jump since the accident that nearly killed me just a year ago. As I was lying in hospital, thinking that I would never skydive again, I wasn’t feeling glad to be alive. Instead I was wondering how I could possibly live without it.
It all started one evening after another nine-to-five day. I was sitting at home thinking, “There has to be more to life than this,” when an advertisement came on the television: “Try skydiving!”
The next day, I called the nearest skydiving centre and booked my first jump.
I will never forget my first jump. It was a beautiful, cloudless day and the sun was just going down. As I pushed myself away from the plane at 11,000 feet, my mind went blank.
Words cannot describe the excitement I experienced while I was free-falling. That was the most amazing four minutes of my life.
From the first jump, I was hooked. I started spending every free moment I had skydiving. At work, I sat in front of my computer and imagined ways of making more money so that I could jump more often.
The accident happened on my 1,040th jump. Another skydiver collided (碰撞) with my parachute (降落傘) at 80 feet. I fell and hit the ground at about 30 mph, face down. I broke my legs, my right arm and my nose. I lost 6 litres of blood, 19 teeth and 25 pounds of fat. I was lucky to be alive.
People who have never experienced skydiving will find it hard to understand that my only motivation to get better was that I could do it again. All I can say is that for me, skydiving is life and life is skydiving.
50. What can we learn about the author’s first skydiving from the text?
A. The author planned it for a long time.
B. The author was too excited to enjoy it.
C. It turned out to be fairly successful.
D. It took place a year before the accident.
51. The underlined part “I was hooked” most probably means “__________”.
A. I was attracted by skydiving          B. I was shocked by skydiving
C. I became familiar with skydiving      D. I became curious about skydiving
52. Which of the following shows the author’s strong will for skydiving?
A. The author spent almost every nine-to-five day skydiving.
B. The author worked hard to make more money for skydiving.
C. The author imagined himself skydiving while at the hospital.
D. The author expected to recover only to continue skydiving.

查看答案和解析>>

科目: 來源:不詳 題型:閱讀理解


C
While they were almost unknown twenty years ago, it seems that mobile phones these days are part of everyone’s life. However, as with other inventions such as the television and the computer, they are a double-edged sword, inviting both supporters and opponents, especially in regard to their use in public places like restaurants and cinemas.
One of the strongest arguments in favor of forbidding mobiles in public places is the trouble they cause to other people. For example, although we are often asked to turn off our phones when in a cinema, the film that we are watching is often interrupted by the sound of at least five rings. To make it even worse, some people insist on continuing their conversation, even though hundreds of people can hear what they say, which often drowns out the voice from the film. As a result, many people would welcome a ban on mobile phones in places where they might disturb other people.
On the other hand, there are a number of arguments against such a ban. It is difficult to stop people bringing with them their mobile phones in public places, making it almost impossible to call for a ban. Some people would see this as an infringement(侵犯)of their rights, while other people would say they need them in case of an emergency. Despite being asked to silence their phones, some people insist on leaving them on.
It seems to me that a ban on mobile phones would not have any result in the end. People will find a way to escape a ban. Nevertheless, people should be discouraged from using them in public places, unless it is highly necessary. They should be made to know that it is bad manners to use them in certain places or at certain times. Of course, there will always be someone who thinks their call is more important than others’ peace and quiet!
53. Why are many people for a ban on the use of mobiles in public places?
A. Because hundreds of people can hear them talk.
B. Because they are asked to turn off their mobiles.
C. Because other people’s peace and quiet is more important.
D. Because many people find a way to escape a ban.
54. Among those who are against a ban, some believe that __________.
A. they can turn off their mobiles when it is necessary
B. it is their right to use their mobiles in public places
C. a ban on mobiles would not have any result
D. they can silence their mobiles when in public places
55. The author of the text thinks that __________.
A. mobiles can be used in case of an emergency in public places
B. mobiles should be turned off in public places
C. mobiles should not be banned in public places
D. it is possible to ban the use of mobiles in public places
56. Which of the following would be the best title for the text?
A. Disadvantages of Mobiles in Public Places
B. Why Not Ban Mobiles in Public Places?
C. Should Mobiles Be Banned in Public Places?
D. Manners for Mobile Users in Public Places

查看答案和解析>>

科目: 來源:不詳 題型:閱讀理解


D
Ellen Swallow Richards was the first woman to earn a bachelor’s degree from Massachusetts Institute of Technology (MIT). A chemist, social activist, teacher, and first woman member of the Institute of Engineering, she believed that housekeeping was a science. As a progressive thinker at the time, she thought that women needed to learn about money matters and have up-to-date information on cleanliness and nutrition. She encouraged women from all backgrounds to get the best education possible.
Ellen was born in 1842 and was brought up in Massachusetts. A graduate of Vassar College in New York, she returned to New England to attend MIT. After her marriage to Professor Robert Richards, she worked in a laboratory at MIT, examining pollution of water sources in Massachusetts. Her work led to the creation of the first food-inspection (檢驗) laws of that state. She was instructor at MIT from 1884 until her death in 1911.
Like other progressive thinkers of the time, Ellen was worried about problems of the poor and the effect of the environment on society. She considered the environment a key factor in quality of life. Within the family, as in the world at large, science was chief in tools used to help the poor. Science could help to manage money matters, keep a home safe and clean, and improve quality of life. Food properly cooked could be tasty, nutritious, and inexpensive. Better and cheaper food could protect the health and improve the lives of working-class families.
Ellen created the science of housekeeping, now called home economics, and elevated(提升)it to a serious college subject. She worked tirelessly as a national leader in developing standards, materials, and teacher training for this new field. Her publications cover many subjects—from the chemistry of cooking and cleaning to the cost of living.
57. According to the text, Ellen __________.
A. provided new jobs for the poor            B. helped to create new kinds of food
C. set up the field of home economics         D. created the ideas of food-inspection laws
58. As a progressive thinker, Ellen __________.
A. suggested people cook their own meals at home
B. believed cheap food was better than expensive one
C. advised women to get the best education possible
D. considered money matters a key factor in quality of life
59. Ellen believed that __________.
A. poor families knew how to manage money
B. families were well informed about good nutrition
C. cheaper food could not protect people’s health
D. families spent much on food but were not well nourished
60. One can infer that, as a result of the efforts of people such as Ellen, __________.
A. one may study home economics at a university for a career
B. the pollution of water sources is no longer a problem
C. most people today learn to cook at school
D. science does not help much within the family as in the world

查看答案和解析>>

科目: 來源:不詳 題型:完形填空


第二節(jié)(共5小題,每小題2分,滿分10分)
根據(jù)短文內(nèi)容,從下框的A—F選項中選出能概括每一段主題的最佳選項。選項中有一項為多余選項。
A.Environment protection
B.Driving experience
C.Self – driving
D.Safety
E. Computing and communications
F. Wireless communications

 

 
61.

Today, the Internet is in a few cars; tomorrow, broadband (寬帶) will be in all of them. Any capability a personal computer has, a car will have, including two – way wireless communications for receiving e – mail, music, and movies. When you’re crossing the lonely place, the kids can watch TV if they’re bored. Every passenger will have a video feed.

 

 
62.

    Every car will have a self – driving system linked to GPS satellites. Radar sensors (傳感器) will track nearby cars. On the freeway, they’ll slow your car when the car ahead of you slows; in town, they’ll help you park without hitting other cars. At rush hour, you’ll get the routes around traffic jams and accidents. The self – driving system in a car makes it possible for the car to drive itself, though some scientists say that’s 30 to 40 years off.

 

 
63.

    Motor vehicles today represent 20 to 30 percent of the world’s energy use. In the near future, a small gasoline engine and an electric motor will be brought together. Drivers will use electricity in a storage battery for short distances. Longer term, cars might burn hydrogen or use a fuel cell that converts a fuel like hydrogen and combines it with oxygen to create power. Then the waste will be pure water.

 

 
64.

   You’ll use the voice control: “Make it a bit cooler” or “find me country music”. Lighter, more reliable electronic controls replace mechanical controls. Fiber optics (光纖) replace electrical wires and light bulbs. Seats will be air – conditioned. The car will travel with one side higher than the other when turning, just as an airplane does now.

 

 
65.

   Cars will avoid some accidents by maintaining safe following distances, and by sensing sleepy or drunk drivers. Air bags will adapt for every passenger according to their size, weight, and position in case accidents happen.

查看答案和解析>>

科目: 來源:不詳 題型:完形填空


II.語言知識及應(yīng)用(共兩節(jié),滿分35分)
第一節(jié) 完形填空(共10小題;每小題2分,滿分20分)
閱讀下面短文,掌握其大意,然后從2l~30各題所給的A、B、C和D項中,選出最佳選項,并在答題卡上將該項涂黑。
One evening I made a trip to the grocery store (雜貨店). As I   21   the room I noticed a man off to the side with a small cardboard   22   that read something to the effect : “Needing change for a hot meal.”
I also   23   several people passing him by with little more than a glance. He looked to be a traveler and seemed to be very humbled at having to ask of others. I too walked on by, but with a seed of a (n)   24   planted in my mind. I went to the far back of the grocery store where they offered the only thing I could think of that would be   25  . I bought him a couple slices of pizza and immediately went back outside to   26   it to him. I told him that it wasn’t much but it was the   27   think they had that was hot. I smiled   28   and turned to walk away and as I did he smiled back with a deep   29   and let out a very soft “thank you”. That look was worth ten times more to me than what I had been able to offer him, and it was a look I won’t   30  .
21.A.knocked at       B.closed       C.left       D.entered
22.A.sign         B.signal       C.notice       D.a(chǎn)dvertisement
23.A.inquired      B.noticed     C.begged     D.stared
24.A.dream         B.game     C.idea      D.trick
25.A.cheap          B.hot       C.delicious   D.warm
26.A.show         B.a(chǎn)ward       C.deliver      D.offer
27.A.only         B.very     C.same     D.exact
28.A.secretly       B.Shyly     C.gently       D.broadly
29.A.shyness        B.curiosity   C.surprise    D.a(chǎn)ppreciation
30.A.forget          B.forgive     C.treasure    D.Doubt

查看答案和解析>>

科目: 來源:不詳 題型:完形填空


第二節(jié) 信息匹配(共5小題;每小題2分,滿分10分)
閱讀下列應(yīng)用文及相關(guān)信息,并按照要求匹配信息。請在答題卡上將對應(yīng)題號的相應(yīng)選項字母涂黑。
以下是美國某報紙所提供的幾種服務(wù)機(jī)構(gòu)及其服務(wù)范疇。
A.Vista’s Enrichment Program Helps Shay Find Role Models and Alter Bad Attitudes. At a time when arts education is disappearing in public schools, Vista’s enrichment programs are thriving, providing residents and students valuable outlets for creativity, allowing them to express themselves, boosting their self – esteem, and helping them to heal.
B.The Child Car Program is a comprehensive program combining child care, child development services, mental health services, and family support services to income eligible families. Child care is provided in a network of 20 State licensed family child care homes located in the Hollywood and Mid – Wiltshire areas. The program enables low – income parents to work or attend school or job training programs, thus supporting and enhancing parent / family self – sufficiency and self – esteem.
C.The Family Project is a prevention and treatment program for families with young children and their siblings who are at – risk for child abuse and neglect. Clinicians make weekly home visits to provide counseling / family therapy, parent education, child development guidance, family support services, mental health services, and case management.
D.The Teen Parent Project serves pregnant and parenting teens at local high schools by providing a combination of education, case management, and counseling. The Teen Project is designed to help students stay in school, be good parents to their children, and avoid continued involvement in high – risk behaviors.
E.Family Service of Santa Monica, Home SAFE. Julia Ann Singer Center, Reiss – Davis Child Study Center and Vista Del Mar Child and Family Services – are always looking for caring dedicated professionals to be part of a team that truly makes a difference in the lives of troubled children. For students pursuing degrees in family / child oriented psychotherapy, Vista Del Mar also offers a Family Therapy Internship Program
F.Community Services – We’re here to assist you in growing your Family through Adoption. Vista Del Mar’s adoption services, established in 1948, is one of country’s largest, state licensed, private, non – profit adoption services. We help over 200 children each year find a permanent home through Domestic, International and Foster Adoption opportunities.
以下是尋求服務(wù)的人員,請匹配人物與他們所需要的服務(wù)機(jī)構(gòu)。
56.Anderson is a firefighter while his wife is a cleaner.They are too busy to look after their two—year-old daughter so they look for someone else with child.care experience to look after her, but they are not well.paid.
57.John is a high school student who lacks confidence.He is very tamed and always fellow others,but he never tries to create anything new, because he believe he himself is low in ability.Now, his parents desire to find role models to inspire him.
58.Charles got married 5 years ago However, his wife lost the ability of giving birth after an accident Now’ they want badly to adopt a child to color their life.
59.Catherine is a girl of 16 studying in a high school of Ohio As a single mother of a two-year-old child,she is suffering from high pressure How she regrets her risk behavior in the past Now, she needs others to teach her to be a good parent as well as give her some advice on coping with different affairs
60.James was born in a low—class family His father is always drunken and beats him while his mother can do nothing but complain.Though is eager to receive a good education but is given no chance to go to school. He hopes to live in a harmonious family where he is cared and respected.He longs for help.
人物                           服務(wù)機(jī)構(gòu)
56.Anderson         A.Vista’s Enrichment Program
57.John             B.The Child Care Program
58.Charles         C.The Family Project
59.Catherine         D.The Teen Parent Project
60.James           E.Family Service Of Santa Monica
F.Community Services

查看答案和解析>>

科目: 來源:不詳 題型:完形填空


第二節(jié):完形填空(共20小題;每小題1分,滿分20分)
閱讀下面短文, 掌握其大意,從短文后各題所給的四個選項(A、B、C、D)中,選出最佳選項。并在答題紙上將該選項標(biāo)號涂黑。
I lived in Dallas, Texas nearly all my life with my mom, dad and older sister. We were     21    to respect others, value education, and get all that we could out of life. My parents always say, “   22    hard and the world is yours.” They are never without a    23  word of advice or a bit of encouragement when life gets tough.
My parents always    24    me to go to college. However, when I     25    at 16 years old that I’d rather get married to a man than go to college, they    26    stopped telling me they loved me and I could do anything I wanted to.     27    , they persuaded me. I graduated from high school and currently     28     the University of Oklahoma studying medicine. I want to make the     29    a better place to live in.
Every time I call home to tell them about a     30    I received in Chemistry Lab or Microeconomics or     31     class it is that I’m working hardest for at the moment, they tell me how     32    of me they are. I know there are college kids out there that have no one to call home to when they get an “A” on a project and I feel incredibly     33    to have my parents.
Don’t get me wrong: We’ve had our share of     34   . I was the angry teenager and they were the awful    35     that wouldn’t let me stay out all night or let me get my tongue pierced. But somehow, we    36   to work through those issues. They never    37   loving in me or believing in me.
I    38   everything I am to my parents. Without their constant love and       39    , I wouldn’t believe I can change the world. My parents taught me to always          40    for what I believe in. So I’m working toward something really great and can only hope I continue to make them proud.
21. A. brought                     B. introduced         C. raised                       D. produced
22. A. Educate                     B. Work                C. Train                       D. Practise
23. A. helpful              B. harmful             C. stressful                   D. meaningful
24. A. reminded            B. expected          C. supposed                  D. designed
25. A. hesitated             B. judged                     C. fixed                        D. decided
26. A. never                  B. ever                  C. seldom                     D. hardly
27. A. Carefully            B. Hopefully          C. Thankfully               D. Delightfully
28. A. serve                  B. attend               C. admit                       D. join
29. A. fortune               B. planet               C. universe                   D. world
30. A. grade                  B. problem            C. failure                      D. value
31. A. whenever            B. wherever           C. whichever                D. however
32. A. modest               B. proud                  C. ashamed                   D. nervous
33. A. annoyed                 B. praised              C. relaxed                     D. blessed
34. A. lessons                B. problems           C. moments                  D. experiences
35. A. teachers                     B. directors            C. couples                    D. parents
36. A. managed             B. attempted          C. succeeded                 D. conducted
37. A. concluded           B. began                C. prevented                 D. stopped
38. A. pay                    B. owe                C. own                         D. spend
39. A. agreement           B. excitement         C. encouragement         D. statement
40. A. fight                   B. look                  C. defend                            D. protect

查看答案和解析>>

科目: 來源:不詳 題型:閱讀理解


第二部分: 閱讀理解(第一節(jié)20小題, 每小題2分; 第二節(jié)5小題;每小題2分,滿分50分)
第一節(jié):閱讀下列短文,從每題所給的四個選項(A、B、C和D)中,選出最佳選項,并在答題卡上將該項標(biāo)號涂黑。
A
John Blanchard was studying the crowd making their way through the station. He was looking for the girl with a rose whose heart he knew, but whose face he didn’t.
When reading a book in a Florida library a year before, John became interested not in the contents of the book, but in the notes penciled in the margin. The handwriting reflected a thoughtful soul and beautiful mind. He discovered the former owner's name in the front of the book: Miss Hollis Maynell.
He located her address and wrote a letter introducing himself. The next day he was shipped overseas to serve in the army. During the next year, they grew to know each other through the mail and their friendship developed. John requested a photograph, but she refused, saying if he really cared, it wouldn't matter what she looked like. When the day finally came for him to return home, their first meeting was suggested — 7:00 p.m. at the Grand Central Station in New York.
She wrote, “You’ll recognize me by the red rose I wear on my coat.” So now John was in the station to meet the girl with a rose.                                        
As a pretty and slim girl in green came over, John noticed her blue eyes like flowers in spring. He walked directly towards her, entirely forgetting she was not wearing a rose. As John came closer to her, he saw another woman with a red rose stood nearby. Well past 40, this woman had graying hair done under a worn hat. Seeing the girl in green walk quickly away, John felt as if he were split in two. He desired to follow that girl, but longed for the woman whose spirit had truly companioned and supported him.
The woman looked gentle and sensible. John went to her, saying, “I’m Captain John Blanchard. You must be Miss Maynell. I am glad to meet you here. May I take you to dinner?”
She replied with a smile, “I don’t know what this is about. But the lady in green who just went by, begged me to wear this rose on my coat. She said if you asked me out to dinner, I’d tell you she is waiting for you in the big restaurant across the street. She said it was some kind of test!”
41. John was eager to know the former owner of the book because he______.
A. was very interested in the contents of the book
B. was impressed by the notes written by its owner
C. wanted to improve his handwriting
D. wanted to discuss the book with her
42. What happened to John after getting in touch with Miss Hollis Maynell?
A. He served in the army abroad.             B. He went overseas for vacation.
C. He went on a business trip in New York.      D. He visited Miss Maynell.
43. What do we know about the woman with a rose?
A. She was Miss Maynell’s close friend.   B. She was a waitress in the big restaurant.
C. She was probably a passerby.         D. She was paid to meet John at the Station.
44. Which would be the best title of the text?
A. An Interesting Book                              B. A Woman With a Rose
C. A Brave Soldier                            D. A Love Test

查看答案和解析>>

科目: 來源:不詳 題型:閱讀理解


D
“Up until about five years ago, students at this school could have worn anything they wanted on Halloween,” said Rosemarie Nielson, a sixth-grade teacher at St. Theresa School, a Roman Catholic elementary school in the Pelham Bay section of the Bronx where there is a prohibition on toy weapons.
“When you consider all the horrific things that have happened in recent years, including 9/11, I can’t blame any school for wanting to stay away from anything that might promote violence,” Ms. Nielson said.
Mary Ellen Manniello, whose daughter, Courtney, 9, is a fourth grader at St. Gabriel School, a Roman Catholic elementary school in the Riverdale section of the Bronx, said she understood why officials had banned weapons with costumes. “They’re learning more about guns from issues in the street than educational issues.”
This year, the school has gone one step further and is prohibiting all costumes at its Halloween festivities. Ms. Manniello said it had become “a chaotic scene,” with parents helping their children change into their costumes at school.
Some parents said the no-weapons policy for Halloween costumes went too far and denied children a chance to express themselves.
“Halloween has always been the one day when it was acceptable for our children to be dressed like somebody they are not, like a cowboy or a pirate or a person from outer space, and now we’re taking that away from them,” said Laura Santoro, a nurse from New Milford, Conn., whose 7-year-old son, Johnny, is a second grader at Northville Elementary School there.
Ms. Santoro said that her son would dress as Capt. Jack Sparrow, the character played by Johnny Depp in the “Pirates of the Caribbean” movies, at the school’s Halloween party, but that he would not be allowed to take a sword — part of a policy that caught her by surprise last Halloween.
“I sent my son to school last year dressed as a special force Power Ranger, and he was told that he couldn’t take along his red laser blaster, which really surprised me, because the laser is red and made of plastic and lights up, and it could never, ever be mistaken for a real gun,” Ms. Santoro said. “I mean, come on, the whole thing is getting really sad.”
53. What do you think is the writer’s purpose of writing the passage?
A. To introduce to the public the no-weapons policy for Halloween costumes.
B. To state parents’ attitudes towards the no-weapons policy for Halloween costumes.
C. To tell the public that children should bring any weapons for Halloween costumes.
D. To analyse the fact that the no-weapons policy for Halloween costumes goes too far.
54. According to the passage, some parents understand the no-weapon policy for Halloween costumes because ____________.
A. schools should take a cautious approach to Halloween to prevent violence.
B. children are buying real guns in the street and there is always violence now.
C. those parents like to help their children change into their costumes at school.
D. children are learning more about guns from educational issues.
55. Which of the following is probably right according to the passage?
A. Children could bring any weapons into school five or six years ago.
B. The parents surveyed are those whose children are in elementary schools.
C. Guns are necessary on Halloween for children to express themselves.
D. Jack Sparrow is an actor who at one time acted as a pirate in a movie.
56. What do the underlined words “l(fā)aser blaster” in the last paragraph refer to?
A. A kind of costume.                           B. A real gun.
C. A toy weapon.                                 D. A kind of plastic.

查看答案和解析>>

科目: 來源:不詳 題型:完形填空


第二節(jié)、任務(wù)型閱讀(共5小題,每小題2分,滿分10分)
請閱讀下列出游者和旅游景點(diǎn)的相關(guān)信息,并按照要求匹配適合他們的旅游景點(diǎn)。請將對應(yīng)題號的相應(yīng)選項的字母寫在答題卷上。
61. Daniel, a young computer programmer, has been working hard and needs a holiday to relax in winter. He likes to get close to nature and enjoy water sports.
62. Henry and Ann and their two teenage sons, hope to take their holiday outdoors. They would like to find a place where they can play games, such as looking for treasure.
63. Philip, a high school student, wants to travel on weekends, and would like to learn about materials to use when building a setting for the train set.
64. Teresa, a primary school teacher, plans to take the whole class of 20 students for a holiday. The students will graduate this year, so she’d like to organize an activity without charge but it is instructive.
65. Tony, a young engineer in a modern car factory, enjoys an adventure journey once a year. This time, he would like to have journeys to the countryside, where he can try to learn about driving a horse and carriage.
A:
Brightwood Park
Take you up to Westfield’s natural preserve for a short hike or to practice skipping stones in the large pond. You can look for deer and other woodland animals or go on a nature treasure hunt.
B:
Jewark Airport
The airport offers free tours covering the history of the airport, terminal operations, and emergency vehicles and equipment for groups of 15 to 30 persons. The tours are intended for students in grades three and above. See also Newark International Airport.
C:
Cheesequake State Park
The Cheesequake State Park features 1,284 acres of open fields, a hardwood forest, a variety of wildlife and about 200 species of birds. Activities include hiking, boating, canoeing, swimming and a variety of winter sports. An interpretive Center provides live wildlife exhibits and environmental education programs, including nature walks.  
D:
The Model Railroad Club
The Model Railroad Club is an activity of the Union County Park System. The Club is open to visitors every Saturday afternoon for viewing the model train displays. Every fall, the Club sponsors a Light and Sound Show that will delight the model train lovers.
E:
Fosterfields Living Historical Farm
Learn about farming as it was done 100 years ago at Fosterfields Living Historical Farm. There are weekend demonstrations on planting and harvesting crops as well as special programs held throughout the year. Some of these include wool cutting and carriage driving.
F:
Deutsch Museum
Germany's leading museum of science, engineering, and transportation has everything from steam engines to space exhibits--some of which are closed for remodeling until May, 2003. Don't miss the Forum der Technik, which has a world-class planetarium and an IMAX theatre.

查看答案和解析>>

同步練習(xí)冊答案