When I was eight years old, I had a big accident. I get scared even now when I think about that time. There were many people skating near my house, and seeing them skate so wonderfully, I couldn’t wait to have a try, just a piece of cake, I thought .
I went with a friend who was very skillful. He spent a long time teaching me how to skate , but I still didn’t learn much , which made him very angry. Finally , he left me and skated all around. I skated alone and soon got bored because I kept falling down so I took off my skates and just walked around on the ice in my shoes. It was cold and my feet were frozen.
Suddenly, I stepped on something that was not hard. What was it ? It was a weak place in the ice . When I stepped there, I sank under the ice. I thought that I was going to die, but I did my best to grab something to get out from under the ice. I would have climbed out myself by grabbing the edge of the ice, but at that time I was only a child of eight . I cried out.
Fortunately, someone helped me. He grabbed my arms and pulled me up. Those several minutes seemed a year to me. I thanked him. At that time, my friend came back. I was annoyed at him because he was supposed to take care of me, but he didn’t. He was embarrassed. When I took a taxi home, the taxi driver was surprised and asked what had happened. I didn’t want to say anything because I was tired and scared. Since then, I have never touched skating.
1.At first the writer thought that skating _________________.
A.was hard to learn
B.was only suitable to watch
C.was easy to learn
D.can only be done with support
2. Why did the writer’s friend leave and skate alone? ___________
A.He wanted to show off his skating skill before the writer.
B.He was disappointed at the writer’s performance.
C.He was too tired to go on teaching the writer.
D.He found he had no gift for teaching others to skate.
3. According to the writer, if an adult sank under the ice, he would _____________.
A.grab the edge of the ice and get out.
B.have courage to call for help
C.wait until people came to help
D.not like to accept others’ help
4.What effect did the accident have on the writer?
A.He broke away from his irresponsible friend.
B.He didn’t dare to skate any longer
C.He fell ill because of staying under ice too longer.
D.He lost interest in all kinds of sports.
高三英语阅读理解中等难度题
When I was eight years old, I had a big accident. I get scared even now when I think about that time. There were many people skating near my house, and seeing them skate so wonderfully, I couldn’t wait to have a try, just a piece of cake, I thought .
I went with a friend who was very skillful. He spent a long time teaching me how to skate , but I still didn’t learn much , which made him very angry. Finally , he left me and skated all around. I skated alone and soon got bored because I kept falling down so I took off my skates and just walked around on the ice in my shoes. It was cold and my feet were frozen.
Suddenly, I stepped on something that was not hard. What was it ? It was a weak place in the ice . When I stepped there, I sank under the ice. I thought that I was going to die, but I did my best to grab something to get out from under the ice. I would have climbed out myself by grabbing the edge of the ice, but at that time I was only a child of eight . I cried out.
Fortunately, someone helped me. He grabbed my arms and pulled me up. Those several minutes seemed a year to me. I thanked him. At that time, my friend came back. I was annoyed at him because he was supposed to take care of me, but he didn’t. He was embarrassed. When I took a taxi home, the taxi driver was surprised and asked what had happened. I didn’t want to say anything because I was tired and scared. Since then, I have never touched skating.
1.At first the writer thought that skating _________________.
A.was hard to learn
B.was only suitable to watch
C.was easy to learn
D.can only be done with support
2. Why did the writer’s friend leave and skate alone? ___________
A.He wanted to show off his skating skill before the writer.
B.He was disappointed at the writer’s performance.
C.He was too tired to go on teaching the writer.
D.He found he had no gift for teaching others to skate.
3. According to the writer, if an adult sank under the ice, he would _____________.
A.grab the edge of the ice and get out.
B.have courage to call for help
C.wait until people came to help
D.not like to accept others’ help
4.What effect did the accident have on the writer?
A.He broke away from his irresponsible friend.
B.He didn’t dare to skate any longer
C.He fell ill because of staying under ice too longer.
D.He lost interest in all kinds of sports.
高三英语阅读理解中等难度题查看答案及解析
Ammie was only 18 months old when she had an accident that scarred her for life. While her mother was away for a moment , the curious baby reached up to a hot kettle in the kitchen and poured boiling water all over her body.
An ambulance was called and rushed the baby to a nearby hospital. About 20 percent of Ammie’s body had been burned and all of her burns were third degree. The doctors could tell immediately that Ammie’s best chance of survival was specialized burns unit some miles away at Glasgow Royal hospital.
There , using tissue taken from unburned areas of Ammie’s body, surgeons performed complex skin grafts(植皮手术)to close her wounds and control her injuries , an operation that took about six hours. Over the next 16 years, Ammie underwent(经历)12 more operations to repair her body.
When she started school at the age of 4, other pupils made cruel comments or simply wouldn’t play with her . “I was the only burned child in the street, the class and the school,” she recalls, “Some children refused to become friends with me because of that.”
Today, age 17, Ammie can only ever remember being a burned person with scars ; pain is a permanent part of her life, she is still awaiting two further operations. Yet she is a confident, outgoing teenager who offers inspiration and hope to other young burnt victims.
Ammie’s parents have been a great support to her. “They told me people had a problem with my burns, the problem with my burns, the problem was theirs not mine,” says Ammie. “They taught me to cope with other people’s reactions and constantly reminded me I was valued and loved.” Ammie’s positive attitude to life means she is often contacted by burns charities(慈善机构), helping younger patients build their self-respect to live with permanent scars.
Now she is a member the Scottish Burned Children’s Club. “Ammie provides so much encouragement for the younger ones. She is optimistic and outgoing and a perfect role model for them , ” say Donald Todd, chairman of the club.
This month, Ammie will join some younger children on a summer camp. “I’ll show them how to shrug off unkind stares from others , ” she says. Ammie loves wearing fashionable sleeveless tops(无袖上衣), and she plans to show the children at the summer camp that they can too. “I don’t go to great lengths to hide my scars,” she says. “I gave up wondering how other people would react years ago.”
1.Ammie was taken to Glasgow Royal hospital because________.71—75 DDABD
A.it was the nearest hospital to her home |
B.it was the only hospital curing her burns |
C.surgeons there were skilled at performing skin grafts |
D.it was a local hospital excellent at treating burns |
2.How many operations will Ammie have to receive altogether?
A.12 | B.13 | C.14 | D.15 |
3.The underlined phrase “shrug off” in the last paragraph is closet in meaning to ________.
A.ignore | B.avoid | C.accept | D.tolerate |
4.Which of the following best describes Ammie?
A.Shy, pessimistic and discouraged. |
B.Strong-minded, optimistic and helpful. |
C.Fashionable, sensitive and easygoing. |
D.Careful, confident and intelligent. |
5.What is the main idea of the passage?
A.Ammie had an accident and had to do many operations. |
B.Ammie was a brave girl after the accident. |
C.Ammie helped many younger patients. |
D.Ammie has a positive life through many operations. |
高三英语阅读理解中等难度题查看答案及解析
My son Gilbert was eight years old and had been in the Cub Scouts (童子军团) only a short time. Once he was handed a sheet of paper, a block of wood and four tires and told to return home and give them all to his father. That was not an easy task for Gilbert to do. The piece of paper was a set of instructions about how to build a wooden racing car. Gilbert's father laughed when he read the instructions. The block of wood remained untouched as the weeks passed.
Finally, I stepped in to see if I could figure it all out. Having no skills, I decided it would be best if I simply read the instructions and let Gilbert do the work. And he did. Within days, his block of wood was turning into a pinewood racing car.
Then the big night came. With his pinewood racing car in his hand and pride in his heart we headed to the big race. As the race was done in elimination fashion (淘汰赛形式), you could keep racing as long as you were the winner.
Finally, it was between Gilbert and the fastestlooking car there. As the race was about to begin, Gilbert asked if they could stop for a minute, because he wanted to pray. Then the race stopped.
Gilbert prayed in earnest for a very long minute. The Master came up to Gilbert and asked the obvious question, “So you prayed to win, Gilbert?”
My young son answered, “Oh, no Sir. It wouldn't be fair to ask God to help you beat someone else. I just asked him to make it so I don't cry when I lose.”
Children seem to have wisdom far beyond us. Perhaps we spend too much of our prayer time asking God to control the race, make us the champion, or remove us from the struggle, when we should be seeking God's strength to get through what lies in our way.
1.Gilbert's father thought the task given by the Cub Scouts could________.
A. be no trouble at all
B. be too easy for Gilbert
C. be beyond Gilbert's ability
D. require no skills
2.Who finally made the pinewood racing car?
A. Gilbert. B. Gilbert's father.
C. Gilbert's mother. D. The whole family.
3.What can we learn about Gilbert?
A. He made it in the final race.
B. His performance inspired his mom.
C. He thought the Master unfair.
D. He was very afraid of losing the race.
4.The author writes this passage to tell us that ________.
A. adults should communicate more with children
B. we should have faith in our ability to win
C. victory is the power to overcome difficulties
D. friendship is more important than winning
高三英语阅读理解中等难度题查看答案及解析
Ammie Reddick from East Kilbride, Lanarkshire, was only 18 months old when she had the accident that had scarred(留下创伤) her for life. The curious child reached up to grab the wire of a hot kettle in the family kitchen and poured boiling water over her tiny infant frame.
Her mother Ruby turned round and, seeing Ammie horribly burnt, called an ambulance which rushed her daughter to a nearby hospital. Twenty percent of Ammie’s body had been burned and all of her burns were third-degree. There, using tissue taken from unburned areas of Ammie’s body, doctors performed complex skin transplants to close her wounds and control her injuries, an operation that took about six hours. Over the next 16 years, Ammie underwent 12 more operations to repair her body.
When she started school at Maxwelton Primary at age 4, other pupils made cruel comments or simply wouldn’t play with her. “I was the only burned child in the street, the class and the school,” she recalled, “some children refused to become friends because of that.”
Today, aged 17, Ammie can only ever remember being a burned person with scars; pain is a permanent part of her body. She still has to have two further skin transplants. Yet she is a confident, outgoing teenager who offers inspiration and hope to other young burns victims.
She is a member of the Scottish Burned Children’s Club, a charity set up last year. This month, Ammie will be joining the younger children at the Graffham Water Center in Cambridgeshire for the charity’s first summer camp. “I’ll show them how to get rid of unkind stares from others,” she says. Ammie loves wearing fashionable sleeveless tops, and she plans to show the youngsters at the summer camp that they can too. “I do not go to great lengths to hide my burns scars,” she says, “I gave up wondering how other people would react years ago.”
1.How many operations has Ammie already had?
A.Twelve B.Thirteen C.fourteen D.Fifteen
2.What did other children do when Ammie first went to school?
A.They were friendly to her. B.They showed sympathy to her.
C.They were afraid of her. D.They looked down upon her.
3.Ammie will teach the younger children at the Graffham Water Center to___________.
A.face others’ unkindness bravely B.hide their scars by proper dressing
C.live a normal life D.recover quickly
4.Which of the following words can’t properly describe Ammie?
A.Courageous B.Confident C.sensitive D.Outgoing
5.What can be the best title of the passage?
A.A Seriously Burned Girl Survives B.Ways to Get Rid of Unkind Stares
C.Permanent Scars And Pain For a Girl D.A seriously burned angel of Hope
高三英语阅读理解中等难度题查看答案及解析
I started serving the homeless when I was eight years old. I didn’t know these people would make such a big difference in my ______.
Twice a month I go to the church and help get things ready for _______. When the gate is opened, people come ____in to get drinks. They take their seats while breakfast is_______, and then we begin to_______. We each take two plates and carry them _______the line as the plates are ______. Each person receives kinds of foods. I walk to the tables and_______the plates before them. After I’ve served them, I ask if they need_______else and bring them whatever they ask for.
When I first started serving, I was a little _____. At first I stayed close to my mom most of the time, but after I got to know these strangers, I_______that they were friendly people. And the_______of them was often nicer than the outside. I realized that there was no______ to the scared. After serving for a few months, I started to_______seeing the same people each week.
All of these people make my day much_______. The past two years have made a big ______in my life. I do this ____it is the right thing to do. When I serve people, I want them to know that someone _______them and that they matter. Serving makes me happy, but even more _______, it teaches me to love and ______others and helps make the world a better place.
1.A. study B. work C. family D. life
2.A. breakfast B. brunch C. lunch D. dinner
3.A. secretly B. quickly C. slowly D. separately
4.A. ordered B. enjoyed C. prepared D. tasted
5.A. eat B. serve C. leave D. try
6.A. before B. beyond C. above D. along
7.A. emptied B. washed C. filled D. dried
8.A. make B. set C. fix D. show
9.A. nothing B. everything C. something D. anything
10.A. surprised B. embarrassed C. scared D. puzzle
11.A. realized B. admitted C. claimed D. swore
12.A. past B. inside C. surface D. front
13.A. way B. doubt C. reason D. wonder
14.A. get tired of B. take charge of C. get down to D. look forward to
15.A. better B. further C. busier D. easier
16.A. success B. difference C. profit D. fortune
17.A. because B. if C. once D. thought
18.A. relies on B. goes after C. cares about D. looks for
19.A. necessarily B. interestingly C. honestly D. importantly
20.A. respect B. forgive C. inspire D. protect
高三英语完形填空中等难度题查看答案及解析
I was only six years old when a stroke(中风)struck my father. To my mother, a peasant with eight children, the _______ seemed to have ended that day. ________ as I was and seventh born in a family of eight children, I ________ my mind on being different. After several years of study, my sisters and brothers ______ school and I was the first child to go to high school.
When I ______ high school, I wrote to the Minister of Education and Sports to ______ me for a degree. Frequently visiting his ______ for over three months, at last I was to meet the minister. I _______ that morning and told myself, “You will see the minister today!” I went to his office and the secretary told me to _____ next time. I asked, “When?” She said, “Afternoon.” At exactly 12:01 pm I was at the door, knocked and entered.
The minister had _____ a note, which was used to introduce me to the president. The following day, I went to the president’s office with a smile on my face. I ____ myself with the minister’s note and was welcomed. I _____ got the financial assistance.
My ______ to young people is simple. Be _______ to achieve your goals. I set my goal to attain a degree no matter how long it would take. If you know what you ______, you will somehow get it.
When life gets tougher, we should ____ harder and be more confident about ourselves. Always be ______ that it’s only you who know the best of yourself. Remember that it’s you who live with the _____ of the decisions you make. When you lose a _____, don’t feel depressed. You may lose some battles but finally win the war! Be the _____ to write your own story and create your own future.
1.A. goal B. world C. desire D. direction
2.A. Little B. Simple C. Naughty D. Weak
3.A. kept B. lost C. set D. changed
4.A. looked out of B. looked forward to C. got away from D. dropped out of
5.A. abandoned B. delayed. C. completed D. expected
6.A. reward B. encourage C. consider D. sponsor
7.A. house B. office C. section D. wife
8.A. stayed up B. calmed down C. woke up D. slowed down
9.A. come back B. set out C. hold on D. hurry up
10.A. borrowed B. written C. connected D. appealed
11.A. introduced B. expressed C. showed D. praised
12.A. generally B. actually C. accidentally D. finally
13.A. message B. faith C. decision D. request
14.A. easy B. brave C. practical D. popular
15.A. use B. prove C. want D. do
16.A. live B. try C. think D. guess
17.A. careful B. proud C. helpful D. aware
18.A. reasons B. results C. experiences D. concepts
19.A. friend B. game C. battle D. dream
20.A. reader B. actor C. speaker D. author
高三英语完形填空中等难度题查看答案及解析
Tess was a precocious(早熟) eight-year-old girl when she heard her Mom and Dad taling about her little brother,Andrew.____ __she knw was that he was very sick and they were completely _____money. They were moving to an apartment complex next month because Daddy didn’t have the money for the doctor’s bills and their house .Only a(n) _____could save him now.
Tess went to her bedroom and pulled a glass jelly(果冻) jar from its hiding place. She poured all the out on the floor and counted carefully. Three times, even. The total had to be absolutely exact. No here for mistakes. After carefully placing the coins back in the jar, she slipped out of the back door, and her way six blocks to a chemist’s.
She waited patiently for the pharmacist (药剂师) to give her some ,but he was too busy at this moment. Tess twisted her feet to make a noise. Nothing. She cleared her with the most awful sound she could muster. No good.
Finally the pharmacist asked in an tone of voice, “What do you want? I’m talking to my brother from Chicago I haven’t seen in ages,” he said without waiting for a reply to his question.
“Well, I want to talk to you about my brother,” Tess answered back in the same annoyed tone. “His name is Andrew and he has something bad inside his head and my daddy says only a miracle can save him now. So how much does a miracle cost?”
“We don’t sell miracles here, little girl. I’m sorry, I can’t help you,” the pharmacist said, his voice a little.
There was a man there whose clothes were admirable. He asked the little girl, “What kind of a miracle does your brother need?”
“I don’t know” Tess replied with tears in her eyes. “I just know he's sick and Mommy says he needs an operation. But my Daddy can’t pay it, so I want to use my money.”
“How much do you have?” asked the man. “One dollar and eleven cents,” Tess answered.
“A dollar and eleven cents ― the price of a miracle for your little brother,” smiled the man, “Take me to you live. Let’s see if I have the kind of miracle you need.”
That well-dressed man was Dr. Carlton Armstrong, a surgeon, specializing in neurosurgery (神经外科). The operation was completely charge and it wasn’t long before Andrew was home again and did well.
Mom and Dad were happy but they wonder how much the operation would have . Tess smiled. She knew exactly how much a miracle cost…one dollar and eleven cents…plus the of a little child.
1.A. As B. All C. All what D. That
2.A. in need B. in short C. out of D. sort of
3.A. miracle B. doctor C. God D. operation
4.A. change B. jellies C. candies D. cookies
5.A. way B. doubt C. chance D. wonder
6.A. drove B. fought C. made D. struggled
7.A. pills B. attention C. medicine D. tablets
8.A. mouth B. eyes C. ears D. throat
9.A. anxious B. exciting C. annoyed D. tired
10.A. who B. where C . because D. which
11.A. finding B. planting C. showing D. growing
12.A. and B. or else C. but D. or
13.A. soft B. soften C. softened D. softening
14.A. really B. real C. firm D. firmly
15.A. back B. for C. off D. up
16.A. actual B. exact C. average D. true
17.A. the place B. the apartment C. the complex D. where
18.A. free B. free of C. not D. no
19.A. spent B. paid C. cost D .took
20.A. thought B. value C. patience D. faith
高三英语完型填空中等难度题查看答案及解析
I first went to hear a live rock concert when I was eight years old. My brother and his friends were all ___36____ of a heavy metal group called Black Wednesday. When they ___37____ that Black Wednesday were going to perform at our local theatre, they all bought ____38___ for performance. However, at the last minute, once of the friends couldn’t go, so my brother __39_____ me the ticket. I was really ___40____!
I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our __41____ . After a few minutes, the lights went down and everybody became ___42____. I could barely make out the stage in the ___43____. We waited. Then there was a roar from the crowd, like an explosion, as the first members of the band ___44____ the stage. My brother leaned over and shouted something in my ear, but I couldn’t ____45___ what he was saying. The first song was already starting and the music was as ____46___ a jet engine. I could ___47____ the drum beats and bass notes in my stomach.
I can’t recall any of the songs that the band played. I just __48_ that I really enjoyed the show and didn’t want it to _ 49_. But in the end, after three encores (加演), the show finished. We left the 50_ and walked unsteadily out onto the pavement. I felt a little dizzy, as if I had just 51_from a long sleep. My ears were still 52_with the beat of the last song.
After the 53 , I became a Black Wednesday fan too for a few years before getting into other kinds of music. Once in a while, 54_, I listen to one of their songs and 55_I’m back at that first show.
1. A. members B. friends C. fans D. volunteers
2. A. guessed B. discovered C. thought D. predicted
3.A. flowers B. drinks C. clothes D. tickets
4.A. booked B. offered C. returned D. found
5. A. relaxed B. embarrassed C. excited D. encouraged
6. A. seats B. entrance C. spots D. space
7.A. comfortable B. quite C. serious D. nervous
8.A. silence B. noise C. darkness D. smoke
9.A.fell upon B.got through C.broke into D.stepped onto
10.A.forget B.hear C. repeat D. bear
11. A.loud B.heard C. sweet D. fast
12.A.feel B.touch C. enjoy D. digest
13. A.realize B.understand C.believe D. remember
14.A.continue B.delay C.finish D. change
15. A.party B.theatre C. opera D. stage
16. A.escaped B.traveled C. benefited D. woken
17. A.aching B.burning C. ringing D. rolling
18. A.competition B. performance C. interview D. celebration
19. A.through B.otherwise C. instead D. besides
20. A.decide B.regret C. conclude D. imagine
高三英语完型填空中等难度题查看答案及解析
I first went to hear a live rock concert when I was eight years old.My brother and his friends were all ____ of a heavy metal group called Black Wednesday.When they ____ that Black Wednesday were going to perform at our local theatre, they all bought ____ for performance.However, at the last minute, one of the friends couldn't go, so my brother ____ me the ticket.I was really ____!
I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our ____.After a few minutes, the lights went down and everybody became ___.I could barely make out the stage in the ____.We waited.Then there was a roar from the crowd, like an explosion, as the first members of the band ____ the stage.My brother leaned over and shouted something in my ear, but I couldn't ___ what he was saying.The first song was already starting and the music was as ____ as a jet engine.I could ____ the drum beats and bass notes in my stomach.
I can't recall any of the songs that the band played.I just ____ that I really enjoyed the show and didn't want it to ____.But in the end, after three encores (加演), the show finished.We left the ____ and walked unsteadily out onto the pavement.I felt a little dizzy, as if I had just ___from a long sleep.My ears were still ____with the beat of the last song.
After the____, I became a Black Wednesday fan too for a few years before getting into other kinds of music.Once in a while,____, I listen to one of their songs and ____I'm back at that first show.
1.A.members B.friends
C.fans D.volunteers
2.A.guessed B.discovered C.thought D.predicted
3.A.flowers B.drinks C.clothes D.tickets
4.A.booked B.offered C.returned D.found
5.A.relaxed B.embarrassed
C.excited D.encouraged
6.A.seats B.entrance C.spots D.space
7.A.comfortable B.quite
C.serious D.nervous
8.A.silence B.noise C.darkness D.smoke
9.A.fell upon B.got through
C.broke into D.stepped onto
10.A.forget B.hear C.repeat D.bear
11.A.loud B.heard C.sweet D.fast
12.A.feel B.touch C.enjoy D.digest
13.A.realize B.understand C.believe D.remember
14.A.continue B.delay
C.finish D.change
15.A.party B.theatre C.opera D.stage
16.A.escaped B.traveled
C.benefited D.woken
17.A.aching B.burning C.ringing D.rolling
18.A.competition B.performance
C.interview D.celebration
19.A.though B.otherwise C.instead D.besides
20.A.decide B.regret
C.conclude D.imagine
高三英语完型填空困难题查看答案及解析
I became a magician by accident. When I was nine years old, I learned how to make a coin disappear. I’d read The Lord of the Rings and gone into the adult section of the library to be buried in fantasy literature but young enough to still hold out hope that you might find a book of real, actual magic in the library. The book I found taught basic techniques, and I tried to practice.
At first the magic wasn’t any good. It was just a trick—a bad trick. I spent hours each day running through the secret moves in front of the mirror. I dropped the coin over and over, a thousand times in a day, and after two weeks my mom got a carpet and placed it under the mirror to muffle (消音) the sound of the coin falling again and again.
One day I made the coin disappear on the playground. We had been playing football and were standing in the field behind the school. A dozen people were watching. I showed the coin to everyone. Then it disappeared. The kids screamed. Everyone went crazy.
A few years later, I staged an underwater escape in the river that flowed through the middle of the campus of the University of Iowa, where I went to school. I stood on a boat in the middle of the river wearing nothing but biking shorts. The sky was dead and gray, and the water was cold at the surface, and colder in the depths below.
Technically, I succeeded. I jumped into the water, sank to the bottom, and escaped from the locks and the chains before swimming to the surface. But it didn’t feel like a success.
1.What do we know about the author?
A. He became a magician in one day.
B. He found wonderful techniques in the library.
C. In order to become a magician he never stopped practising.
D. He looked through every section of the library to search for a useful book.
2.Why did the author’s mother bring a carpet home?
A. To encourage him to clean the house.
B. To make the sounds less noisy than before.
C. To have guests clean their shoes on entering the house.
D. To decrease the number of cleaning the house.
3.How did the author make the kids scream?
A. By playing football with them. B. By making the showing coin disappear.
C. By practising his techniques more frequently. D. By providing hands-on practice.
4.What can be a suitable title for the text?
A. The Magic Trick that Changed My Life B. A Nineteen-year-old Magician
C. What Can Give You a Magic Life? D. A Brief Introduction to a Magician’s Life
高三英语阅读理解中等难度题查看答案及解析