When I was a child of seven years old, my friends, on a holiday, filled my pocket with coppers. I went at once to a shop where they sold toys for children. Being ________ with the sound of a whistle that I had seen by the way, in the hands of another boy, I ________ all my money for one. I then came home, and went whistling all over the house, much pleased with my whistle, but ________ all the family. My brothers and sisters and cousins, when I told of the ________ I had made, said I had given four times as much as the whistle was worth. They put me in mind of what good things I might have bought with the ________ of the money, and laughed at me so much for my folly that I cried with vexation(烦恼). Thinking about the matter gave me more ________ than the whistle gave me pleasure.
_____, this was afterwards of use to me, for the impression continued ________ my mind, so that often, when I was ________ to buy something I did not need, I said to myself, “Don’t give too much for the whistle,” and I saved my money. As I grew up, came into the world, and ________ the actions of men, I thought I met with many, very many, who “gave too much for the whistle.”
If I knew a miser(守财奴)who ________ every kind of comfortable living, all the pleasure of doing good to others, all the esteem of his fellow citizens and the joys of friendship, ________ gathering and keeping wealth “________ man,” said I, “you pay too dear for your whistle.” When I met a man of pleasure, who did not try to improve his mind or his fortune but ________ devoted himself to having a good time, perhaps ________ his health, “Mistaken man, you are providing ________ for yourself, instead of pleasure; you are paying too dear for your whistle.” If I saw someone fond of ________ who has fine clothes, fine houses, fine furniture, fine earrings, all above his ________, and for which he had run into debt, and ended his career in a prison. “Also,” said I, “he has paid dear, very dear, for his whistle.” ________, the miseries of mankind are largely due to their puffing a(n) ________ value on things — to giving “too much for their whistle.”
1.A. faced B. charmed C. sympathized D. provided
2.A. set aside B. put up C. handed over D. took over
3.A. disturbing B. attracting C. entertaining D. confusing
4.A. trouble B. attempt C. choice D. bargain
5.A. rest B. value C. majority D. part
6.A. satisfaction B. relief C. annoyance D. stress
7.A. Moreover B. Therefore C. However D. Indeed
8.A. out of B. on C. to D. from
9.A. tempted B. determined C. forced D. persuaded
10.A. took B. observed C. admired D. followed
11.A. turned against B. gave up C. cared about D. relied on
12.A. in case of B. instead of C. for the sake of D. in terms of
13.A. Wealthy B. Poor C. Wise D. Innocent
14.A. merely B. similarly C. strangely D. positively
15.A. cherishing B. enjoying C. benefiting D. neglecting
16.A. inconvenience B. burden C. frustration D. pain
17.A. appearance B. wealth C. comforts D. necessities
18.A. demand B. fortune C. standard D. value
19.A. As a result B. By contrast C. On average D. In short
20.A. unexpected B. great C. false D. extra
高二英语完形填空困难题
When I was a child of seven years old, my friends, on a holiday, filled my pocket with coppers. I went at once to a shop where they sold toys for children. Being ________ with the sound of a whistle that I had seen by the way, in the hands of another boy, I ________ all my money for one. I then came home, and went whistling all over the house, much pleased with my whistle, but ________ all the family. My brothers and sisters and cousins, when I told of the ________ I had made, said I had given four times as much as the whistle was worth. They put me in mind of what good things I might have bought with the ________ of the money, and laughed at me so much for my folly that I cried with vexation(烦恼). Thinking about the matter gave me more ________ than the whistle gave me pleasure.
_____, this was afterwards of use to me, for the impression continued ________ my mind, so that often, when I was ________ to buy something I did not need, I said to myself, “Don’t give too much for the whistle,” and I saved my money. As I grew up, came into the world, and ________ the actions of men, I thought I met with many, very many, who “gave too much for the whistle.”
If I knew a miser(守财奴)who ________ every kind of comfortable living, all the pleasure of doing good to others, all the esteem of his fellow citizens and the joys of friendship, ________ gathering and keeping wealth “________ man,” said I, “you pay too dear for your whistle.” When I met a man of pleasure, who did not try to improve his mind or his fortune but ________ devoted himself to having a good time, perhaps ________ his health, “Mistaken man, you are providing ________ for yourself, instead of pleasure; you are paying too dear for your whistle.” If I saw someone fond of ________ who has fine clothes, fine houses, fine furniture, fine earrings, all above his ________, and for which he had run into debt, and ended his career in a prison. “Also,” said I, “he has paid dear, very dear, for his whistle.” ________, the miseries of mankind are largely due to their puffing a(n) ________ value on things — to giving “too much for their whistle.”
1.A. faced B. charmed C. sympathized D. provided
2.A. set aside B. put up C. handed over D. took over
3.A. disturbing B. attracting C. entertaining D. confusing
4.A. trouble B. attempt C. choice D. bargain
5.A. rest B. value C. majority D. part
6.A. satisfaction B. relief C. annoyance D. stress
7.A. Moreover B. Therefore C. However D. Indeed
8.A. out of B. on C. to D. from
9.A. tempted B. determined C. forced D. persuaded
10.A. took B. observed C. admired D. followed
11.A. turned against B. gave up C. cared about D. relied on
12.A. in case of B. instead of C. for the sake of D. in terms of
13.A. Wealthy B. Poor C. Wise D. Innocent
14.A. merely B. similarly C. strangely D. positively
15.A. cherishing B. enjoying C. benefiting D. neglecting
16.A. inconvenience B. burden C. frustration D. pain
17.A. appearance B. wealth C. comforts D. necessities
18.A. demand B. fortune C. standard D. value
19.A. As a result B. By contrast C. On average D. In short
20.A. unexpected B. great C. false D. extra
高二英语完形填空困难题查看答案及解析
Gabby Logan was a gymnast when she was young. She is now the 39-year-old mother of seven-year-old twins, Reuben and Lois. The other day on TV she was dressed in a new swimsuit, which was designed to show off her nice figure, which was admired by a great number of television viewers.
Gabby, who won high praise for her television show of the Olympics, has asked the woman of the whole nation to go to the swimming pool, saying the secret of her figure is regular swimming. She is also making advertisements for the new Sculpture Swimwear of Speedo, an international swimsuit company, to help women find the perfect swimsuit.
Gabby said, "We all felt uneasy about getting into our swimwear at first. But we should be excited by the sporting achievements we have seen at the Olympics this summer. To get ourselves a little healthier, have a try and go to the swimming pool. " Then she said," Swimming is the perfect exercise if you want to feel healthy or simply relax. I find that going for a swim always clears my mind and also gives me some valuable 6 my time'. I like the calm of swimming which I can't experience when I am not in the pool. "
A study by Speedo, an International company, which sells swimsuits, reported the biggest reason why women were put off going to the pool was the way they looked in swimwear. More than half of the l,000 women surveyed have been reduced to tears when trying on swimwear. And 48 percent said they felt too self-conscious to go swimming with their children. Sally Polak, from Speedo, said, " We're hoping to give women the courage and confidence to get back into the water. "
1. What can we learn about Gabby Logan?
A. She has two children of the same age.
B. She appeared on TV to show off her nice figure.
C. She was a swimmer when she was young.
D. She took part in the Olympic Games when she was young.
2.What is the main reason why Gabby has a nice figure?
A. She is a gymnast.
B. She often swims.
C. She has a peaceful mind
D. She wears Sculpture Swimwear.
3. The biggest reason why most women were stopped from swimming is _ .
A. their shy mind of wearing the swimsuit
B. their being too busy with their housework
C. their not being comfortable in the swimsuit
D. their being afraid of their child seeing them wear less
4.What is the author's purpose of writing the text?
A. To introduce a famous woman.
B. To discuss a TV show of the Olympics.
C. To report a way of keeping a good figure.
D. To encourage women to go swimming.
高二英语阅读理解中等难度题查看答案及解析
阅读下面短文,根据所给情节进行续写,使之构成一个完整的故事。
When I was seven years old, I went into my parent’s bedroom and saw my mother sitting at her sewing machine making doll clothes. When I asked her who the doll clothes were for, she told me that they were for the poor people, so I never gave it another thought. On the Christmas morning when I opened my present, there were those beautiful doll clothes. I said to her, “I thought the doll clothes were for the poor people.” My mother just smiled and said, “They are for the poor people. We’re poor.”
When I was nine years old my greatest desire in life was to own a pogo stick(弹簧单高跷). I had recently learned to walk on a pair of sticks my dad had made for me, and I thought that if I had a pogo stick surely I would be proud of my unbelievable skills.
When Christmas season rolled around again, I told my mother that the only thing I wanted was a pogo stick. My mother told me they were too expensive and that we simply couldn’t afford one. On a Saturday afternoon a couple of weeks before Christmas, my mom and dad told me we needed to go to Sears to pay our credit bill. While my mother and I were at the counter paying the bill, my dad said, “I’ll be right back. I need to see something in the tool department.” After the bill was taken care of, my mother and I went ahead and got in the truck. Soon my dad came walking out with a long box. I remember wondering at that very moment if it was a pogo stick in that box.
When we arrived back at home, my dad put the box in the barn(谷仓). While my parents were busy with their things, I walked out to the barn and found the box. I was so excited and I knew that as soon as I opened that magical box my bright shiny pogo stick would appear.
No such luck! Inside the box was a silly old broom. And so Christmas morning was both great and disappointing. I got some nice gifts but I didn’t get the present that I really wanted.
注意:1. 所续写短文的词数应为150左右;
2. 使用5个及以上短文中标有下划线的关键词语;
3. 续写部分分为两段,每段的开头语已为你写好;
4. 续写完成后,请用下划线标出你所使用的关键词语。
Paragraph 1:
After all the wrapping(包装) paper was cleaned up, my dad said he needed to tend to something in the barn.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Paragraph 2:
I couldn’t believe how they were able to get the money for it and how they tricked me with the broom.
_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
高二英语读后续写困难题查看答案及解析
完形填空
I’d like to tell you a story my grandmother told me when I was six or seven years old. We had to go to her home for Thanksgiving dinner and the _______ was rather a long one. I had filled the time with making a _______of all the things that I wanted for Christmas that year.
Later I showed the list to my grandmother. After she read it, she said, “That _______is a long list!” Then she told me this story:
“Once there was a little girl who came to live in an orphanage(孤儿院). As Christmas time _______ , all of the other children began _______the little girl about the beautiful Christmas tree that would appear in the huge downstairs _______ on Christmas morning. Each child would be given their one and only Christmas gift, a small, single _______ .”
“The headmaster of the orphanage was very _______ , so when he caught the little girl climbing down the stairs to look at the Christmas tree in the hall, he sharply _______ that the little girl would not _______ her Christmas orange because she had been to _______ as to disobey the rules. The little girl ran back to her room_______ and crying. The next morning as the other children were going down to breakfast, the little girl stayed in her bed. She couldn’t stand the _______ of seeing the others receive their gift when there would be _______ for her. Later, as the children came back, the little girl was _______5 to be handed a napkin(面巾纸). As she carefully _______ it, there to her disbelief was an orange all peeled and sectioned. “It was then that she imagined _______ each child had taken one section from their orange and given it to her so that she, too, would have a Christmas orange.”
How I _______ this story! I would ask my grandmother to tell it to me over and over as I _______. How I wish the world, as a whole world display that same kind of _______ for others, not just at Christmas, but throughout the year.
1.A. story B. drive C. moment D. holiday
2.A. choice B. order C. list D. joke
3.A. hardly B. usually C. specially D. really
4.A. moved B. approached C. linked D. took
5.A. telling B. informing C. warning D. sending
6.A. hall B. kitchen C. bedroom D. reading-room
7.A. apple B. star C. orange D. flower
8.A. serious B. caring C. humorous D. strict
9.A. required B. announced C. asked D. insisted
10.A. deliver B. make C. receive D. reach
11.A. curious B. outgoing C. frightened D. disappointed
12.A. delighted B. blank-minded C. seared D. broken-hearted
13.A. possession B. attraction C. thought D. effect
14.A. few B. none C. everything D. something
15.A. surprised B. happy C. willing D. pleased
16.A. touched B. felt C. smelt D. opened
17.A. whether B. when C. how D. what
18.A. wrote B. loved C. told D. understood
19.A. grew up B. dropped in C. turned up D. hung out
20.A. help B. thankfulness C. happiness D. concern
高二英语完形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 theater. They all bought ___for the 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 theater 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 the 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. fans C. friends D. volunteers
2.A. discovered B. thought C. predicted D. guessed
3.A. flower B. drinks C. tickets D. clothes
4.A. offered B. returned C. found D. booked
5.A. relaxed B. excited C. embarrassed D. encouraged
6.A. space B. entrance C. spots D. seats
7.A. quiet B. comfortable C. serious D. nervous
8.A. silence B. darkness C. noise D. smoke
9.A. fell upon B. got through C. stepped onto D. broke into
10.A. hear B. forget C. repeat D. bear
11.A. hard B. loud C. sweet D. fast
12.A. touch B. feel C. enjoy D. digest
13.A. remember B. understand C. believe D. realize
14.A. continue B. delay C. change D. finish
15.A. party B. opera C. theater D. stage
16.A. escaped B. traveled C. woken D. benefited
17.A. aching B. ringing C. burning D. rolling
18.A. performance B. competition C. interview D. celebration
19.A. besides B. otherwise C. instead D. though
20.A. decide B. regret C. imagine D. conclude
高二英语完形填空简单题查看答案及解析
I have been dancing since I was 14 years old, when my best friend dragged me to an after-school dance class. I enjoyed that dance class so much that I have been dancing ever since. After every dance class, however, I always have to stretch out my legs and back to make myself relaxed! It feels like as much exercise as going to the gym---but dancing is not widely considered to be a sport. Does that dancing is expressive and artistic mean that it is not a sport?
Some dancers would argue that dancing is a sport, as it requires great physical stamina, strong muscles and impressive flexibility. No matter what style of dance you are participating in, you will always be using all of your muscles while dancing and this can often be for several hours a day. Additionally, in the more traditional dance style (like ballet), men often lift their female dance partners high in the air. That means the dancers are often just as athletic as footballers, runners or swimmers.
On the other hand, many people argue that dance is an art form. Dance often exhibit emotion, represent characters and tell stories. Dancing to music is creative and visually appealing to the eyes and ears, just like watching a play or a professional show. The shiny costumes, the stage make-up and the big hairstyles are artistic and imaginative. It is easy to see why many people consider dance to be an art form.
I personally believe that dance is both a sport and an art. I believe that a great dancer will be a mixture of an athlete and an artist. You could have the strongest muscles in the world but not necessarily be a great dancer. Likewise, you could be a great actress who can express emotions easily but you still might not be able to dance. However, whether you consider dance to be an art or a sport, the important thing is to enjoy it! Dancing is a great way to make new friends and it’s a really fun way to exercise!
1.Why does the author think having a dance class is like taking exercise?
A.Because she finds it also needs physical effort.
B.Because she takes interest in dancing as well as in sport.
C.Because she should do much exercise before dancing.
D.Because she finds dancing has hurt her legs and backs.
2.Which of the following can replace the underlined word “stamina” in paragraph 2?
A.activity B.shape
C.strength D.condition
3.How is the text organized?
A.Topic—Comparison—Opinion.
B.Opinion—Discussion—Effect.
C.Main idea—Argument—Discussion.
D.Introduction—Supporting Examples—Conclusion.
4.What is the main artistic feature of dancing?
A.Having a large amount of exercise.
B.Being creative and imaginative.
C.Requiring great physical strength.
D.Creating emotions accurately.
高二英语阅读理解中等难度题查看答案及解析
阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
When I was 14 years old, my best friend 1. (drag) me to an after-school dance class, 2. I enjoyed so much that I have been dancing ever since. After every dance class, however, I always have to stretch out my legs and back! It feels like as much exercise as 3. (go) to the gym—but dancing is not 4. (wide) considered to be a sport.
Many dancers would argue that dancing is a sport, as it requires strong muscles and impressive flexibility. No matter what style of dance you are participating in, you will always be using all of 5. (you) muscles while dancing and this can often be for several hours a day.
On 6. other hand, many people argue that dance is an art form. Dances often exhibit emotion (情感), tell 7. (story), etc. Dancing to music is creative and visually appealing to the eyes and ears, just like watching a play or a(n) 8. (profession) band. The shining costumes, the stage make-up and the big hairstyles are artistic and imaginative.
However, whether you consider dance to be an art 9. a sport, the important thing is to enjoy it! Dancing is a great way 10. (make) new friends and exercise!
高二英语语法填空简单题查看答案及解析
I lost my sight when I was four years old by falling off a car and landing on my head. Now I am thirty-two. I can vaguely remember the brightness of __36____ and what color red is. It would be ___37____ to see again, but a(n) __38____ can do strange things to people. I don’t mean I would __39___ to go without my eyes. I simply mean that the loss of them made me appreciate more what I had _40_____.
My parents and my teachers saw something in me ----- a __41____ to live ---- which I didn’t see, and they made me want to fight in out with _42____.
The __43___ lesson I had to learn was to believe in myself. I am not talking about simply the kind of __44____ that helps me down so unfamiliar staircase alone. I __45___ something bigger than that: a confidence that I am, despite being __46____, a real, positive person; that there is a special place where I can make myself fit.
It took me years to discover and strengthen this confidence. It had to start with the easy and simple things. __47____ a man gave me an indoor baseball. I thought he was laughing at me and I was __48____. “I can’t use this,” I said. “Take with you,” he urged me, “and roll it around.” The words __49___ in my head. “Roll it around!” By rolling the ball I could _50_____ where it went. This gave me an idea how to achieve a goal I had thought _51____ before playing baseball. At Philadelphia’s Overbrook School for the Blind I _52___ a successful variation of baseball. We called it ground ball.
I have set ahead of me a series of goals and then tried to reach them, one at a time. I had to be clear about my _53____. It was no good crying for something that I knew at the start was __54___ out of reach because that only invited bitterness of failure. I would fail something anyway, __55___ on the average I made progress.
1.A. sky B. cloud C. sunshine D. mist
2.A. helpful B. wonderful C. hopeful D. successful
3.A. disaster B. environment C. incident D. wonder
4.A. manage B. try C. want D. prefer
5.A. lost B. left C. used D. cared
6.A. purpose B. potential C. pressure D. preparation
7.A. energy B. happiness C. luck D. blindness
8.A. hardest B. dullest C. simplest D. easiest
9.A. self-respect B. self-control C. self-confidence D. self-defence
10.A. think B. consider C. guess D. mean
11.A. imperfect B. perfect C. unfair D. fair
12.A. Later B. Soon C. Once D. Then
13.A. worried B. encouraged C. shocked D. hurt
14.A. stuck B. impressed C. occupied D. held
15.A. see B. hear C. notice D. observe
16.A. important B. unimportant C. possible D. impossible
17.A. invented B. discovered C. instructed D. directed
18.A. experience B. advantages C. knowledge D. limitation
19.A. hardly B. wildly C. highly D. deeply
20.A. so B. for C. but D. and
高二英语完型填空困难题查看答案及解析
From that day on, when eight-year-old Charlie with gray eyes began riding my school bus, he was a trial. If a fight ______ out, it must have been Charlie. If a girl was crying, ______ were that Charlie had pulled her hair. I practiced every bit of patience, but all ______. However, I spoke to him ______ but firmly, he would stare at me with those big gray eyes without a word.
A little girl sent me a small tin ______. She had written, “To the Best Bus Driver Polly.” One day, I was ______ because of a talk with the headmaster. When I got on the bus, I ______ that the tin heart was gone.“Charlie was the first one on the bus. Check his ______, ”insisted the girl who had given me the heart.
I asked him to come forward, and ______ into his pocket. Then I felt it—the ______ small tin heart. Charlie stared at me for a long time. There were no ______ in those big gray eyes and no plea(恳求) for ______ He seemed to be waiting for what would happen. I was about to pull the tin heart out of Charlie’s pocket when I ______ myself. “Let him keep it,” a ______ seemed to whisper.
Many years later, I was in a department store ______ someone said, “Polly?” I turned to see the big ______ eyes. There was no doubt. It was Charlie. To my ______, he hugged me and pulled ______ from his pocket—the little tin heart that ______, “To the Best Bus Driver Polly.”
“You were the only one who kept ______,” he explained.
1.A. held B. broke C. gave D. got
2.A. challenges B. changes C. choices D. chances
3.A. in secret B. in shape C. in vain D. in sight
4.A. weakly B. gently C. coldly D. rudely
5.A. heart B. bus C. animal D. girl
6.A. blamed B. charged C. teased D. delayed
7.A. doubted B. admitted C. realized D. wondered
8.A. pockets B. books C. seats D. schoolbags
9.A. stretched B. raised C. reached D. pulled
10.A. familiar B. new C. ordinary D. earlier
11.A. pride B. pleasure C. smiles D. tears
12.A. encouragement B. mercy C. recognition D. escape
13.A. stopped B. enjoyed C. devoted D. prepared
14.A. child B. voice C. tone D. noise
15.A. until B. before C. because D. when
16.A. black B. blue C. gray D. red
17.A. surprise B. relief C. amusement D. delight
18.A. nothing B. anything C. something D. everything
19.A. sang B. read C. showed D. appeared
20.A. asking B. practicing C. persuading D. trying
高二英语完形填空中等难度题查看答案及解析
When I was three years old, my parents discovered I was totally deaf. But instead of sending me to a school for the deaf, they decided to “mainstream” me. All of my peers and teachers world have normal hearing.
I was the only deaf child at Blue Creel Elementary School. From almost the first day there, the other kids made fun of me mainly because of my hearing aid and the way I talked. And I also had difficulty with most of my school work.
When the other kids made fun of me, I was sure that I was a bad person. I saw myself as a boy who wasn’t smart enough to keep up with the class.
Mrs. Jordan, my 5th grade teacher, changed all of that with a simple three-word phrase.
One morning, she asked the class a question. I read her lips from my front-row seat and immediately raised my hand because I was sure I had the right answer. But when she called on me, I was afraid. Here was an opportunity to impress the powerful teacher and show her I was worthy of her love. Maybe even impress my classmates a little. I didn’t want to blow it. despite my fears, I took a deep breath and answered Mrs. Jordan’s question.
I will never forget what happened next. Mrs. Jordan enthusiastically slammed (跺动)her right foot on the floor and turned her tight hand around in full circle until it pointed directly at me. With sparking eyes and a wide smile she cried, “THAT’S RIGHT STEPHEN!”
For the first time in my young life, I was a star. I sat a little taller in my chair.
From that day forward, my grades and speech improved greatly. My popularity among my peers increased. It was all because Mrs. Jordan believed in me and wasn’t afraid to express it. “THAT’S RIGHT STEPHEN!”
1.What does the underlined word “mainstream”(in Para 1) mean?
A.Encourage a disabled child to live a normal life. |
B.Include a disabled child in an ordinary class. |
C.Treat a disabled child with respect. |
D.Teach a disabled child at home. |
2.It can be inferred that when entering Blue Creek Elementary School, the writer________.
A.was not clever | B.could not focus on his study |
C.lacked confidence | D.got along well with other kids |
3.When the writer answered Mrs. Jordan’s question, he________.
A.trembled with fear | B.stayed calm |
C.was nervous | D.was excited |
4.From his experience, the writer may conclude that________.
A.the right words could change someone’s life |
B.each of us has the courage to be great |
C.all great heroes made mistakes |
D.each day is a lucky day |
高二英语阅读理解中等难度题查看答案及解析