完形填空(共20小题, 每小题1分,满分20分)
Soon Tommy's parents, who had recently separated (分居), would arrive for a meeting on his failing schoolwork and 16behavior. Neither parent knew that I had called up 17 .
Tommy, an only child, had 18been happy, cooperative, and an excellent student. How could I make his father and mother 19that his recent failing grades 20a brokenhearted child's reaction to his respected parents' separation and possible 21 ?
Tommy's mother came in and 22one of the chairs I had placed near my desk. Then the father 23and was obviously surprised to see his wife. They pointedly(显然) ignored each other.
As I gave a detailed 24 of Tommy's behavior and schoolwork, I prayed for the 25words to bring these two together to help them see what they were doing to their son. 26somehow the words wouldn't come.
I found a crumpled (弄皱的), tear-stained 27stuffed (塞) in the back of Tommy's desk. Writing covered both sides, a single 28scribbled (乱写) over and over.
Silently I smoothed(弄平) it out and gave it to Tommy's mother. She read it and then without a word handed it to her husband. He 29. Then his face softened. He studied the scribbled words for 30seemed a future life.
At last he folded the paper carefully and 31 his wife's outstretched(伸出的) hand. She wiped the tears from her 32and smiled up at him. I also couldn't keep back tears, but 33seemed to notice.
In this way I used the words to 34that family. On the sheet of yellow copy paper 35with the painful outpouring of a small boy's troubled heart, it said.
"Dear Mother ... Dear Daddy ... I love you ... I love you ... I love you."
1. A.satisfying B.exciting C.disappointing D.surprising
2. A.the others B.the other C.another one D.each other
3. A.never B.rarely C.always D.usually
4. A.hope B.believe C.promise D.trust
5. A.stood for B.looked for C.cared for D.made for
6. A.happiness B.cruelty C.selfishness D.divorce
7. A.got B.took C.possessed D.seated
8. A.reached B.sat C.arrived D.went
9. A.account B.record C.comment D.paper
10. A.common B.exciting C.mistaken D.right
11. A.So B.And C.But D.Then
12. A.letter B.sheet C.message D.schoolwork
13. A.word B.article C.phrase D.sentence
14. A.cried B.laughed C.frowned D.smiled
15. A.which B.as if C.what D.when
16. A.reached for B.hunted for C.kept off D.searched for
17. A.faces B.eyes C.head D.nose
18. A.both B.neither C.either D.none
19. A.reunite B.unite C.satisfy D.help
20. A.lined B.formed C.written D.covered
高二英语完型填空中等难度题
完形填空(共20小题, 每小题1分,满分20分)
Soon Tommy's parents, who had recently separated (分居), would arrive for a meeting on his failing schoolwork and 16behavior. Neither parent knew that I had called up 17 .
Tommy, an only child, had 18been happy, cooperative, and an excellent student. How could I make his father and mother 19that his recent failing grades 20a brokenhearted child's reaction to his respected parents' separation and possible 21 ?
Tommy's mother came in and 22one of the chairs I had placed near my desk. Then the father 23and was obviously surprised to see his wife. They pointedly(显然) ignored each other.
As I gave a detailed 24 of Tommy's behavior and schoolwork, I prayed for the 25words to bring these two together to help them see what they were doing to their son. 26somehow the words wouldn't come.
I found a crumpled (弄皱的), tear-stained 27stuffed (塞) in the back of Tommy's desk. Writing covered both sides, a single 28scribbled (乱写) over and over.
Silently I smoothed(弄平) it out and gave it to Tommy's mother. She read it and then without a word handed it to her husband. He 29. Then his face softened. He studied the scribbled words for 30seemed a future life.
At last he folded the paper carefully and 31 his wife's outstretched(伸出的) hand. She wiped the tears from her 32and smiled up at him. I also couldn't keep back tears, but 33seemed to notice.
In this way I used the words to 34that family. On the sheet of yellow copy paper 35with the painful outpouring of a small boy's troubled heart, it said.
"Dear Mother ... Dear Daddy ... I love you ... I love you ... I love you."
1. A.satisfying B.exciting C.disappointing D.surprising
2. A.the others B.the other C.another one D.each other
3. A.never B.rarely C.always D.usually
4. A.hope B.believe C.promise D.trust
5. A.stood for B.looked for C.cared for D.made for
6. A.happiness B.cruelty C.selfishness D.divorce
7. A.got B.took C.possessed D.seated
8. A.reached B.sat C.arrived D.went
9. A.account B.record C.comment D.paper
10. A.common B.exciting C.mistaken D.right
11. A.So B.And C.But D.Then
12. A.letter B.sheet C.message D.schoolwork
13. A.word B.article C.phrase D.sentence
14. A.cried B.laughed C.frowned D.smiled
15. A.which B.as if C.what D.when
16. A.reached for B.hunted for C.kept off D.searched for
17. A.faces B.eyes C.head D.nose
18. A.both B.neither C.either D.none
19. A.reunite B.unite C.satisfy D.help
20. A.lined B.formed C.written D.covered
高二英语完型填空中等难度题查看答案及解析
Soon Tommy’s parents, who had recently separated, would arrive for a conference on his failing schoolwork and bad behavior. Neither parent knew that I had called the other.
Tommy, an only child, had always been happy, cooperative and an excellent student. How could I convince his father and mother that his recent failing grades represented a broken-hearted child’s reaction to his parents’ separation and pending (即将发生的) divorce?
Tommy’s mother entered and took one of the chairs. Soon the father arrived. Good! At least they were concerned enough to be here in time. They ignored each other.
As I gave a detailed account of Tommy’s behavior and schoolwork, I prayed for the right words to bring these two together to help them see what they were doing to their son. But somehow the words wouldn’t come. Perhaps if they saw one of his dirty, carelessly done papers?
I found a sheet in the back of his desk. Writing covered both sides: not the assignment, but a single sentence scribbled (潦草地写) over and over.
Silently I gave it to Tommy’s mother. She read it and then handed it to her husband. Then his face softened.
At last he folded the paper carefully, placed it in his pocket, and reached for his wife’s hand. She wiped the tears from her eyes and smiled up at him. He helped her with her coat and they left together.
In his own way God had given me the words to reunite that family. He had guided me to the sheet of yellow copy paper covered with the pain out pouring of a small boy’s troubled heart.
The words are “Dear Mom…Dear Daddy… I love you…”
1.The author called Tommy’s parents in order to ________.
A. solve the couple’s problem
B. scold them for their divorce
C. help them realize their influence on Tommy
D. blame Tommy for his failing grades
2.This passage is most probably written by _________.
A. a teacher B. a journalist C. a lawyer D. a doctor
3.How did Tommy’s parents feel after seeing the words?
A. Satisfied. B. Troubled. C. Depressed D. Moved
4. We can learn from the passage that _______.
A. the author knew Tommy often wrote to his parents
B. the author said a lot to make Tommy’s parents reunite
C. Tommy hated his parents divorcing
D. Tommy was greatly influenced by his parents
5. What would be the best title for this passage?
A. A separate family B. Tommy’s essay
C. Never divorce D. A good teacher
高二英语阅读理解简单题查看答案及解析
After a while, Tommy’s parents, who had recently separated, would arrive for a meeting on his failing schoolwork and bad behavior. Neither parent knew that I had called the other.
Tommy, an only child, had always been a happy, cooperative and top student. How could I make his father and mother believe that his recent failing grades meant a broken-hearted child’s reaction to his parents’ separation and divorce (离婚)?
Tommy’s mother entered and took one of the chairs. Soon the father arrived. Good! At least they were enough to be here in time. They ignored each other.
As I gave a detailed introduction of Tommy’s behavior and schoolwork, I waited for the right words to bring these two together to help them see what they were doing to their son. But somehow the words wouldn’t come. Perhaps if they saw one of his dirty, carelessly done papers?
I found a sheet in the back of his desk. Writing covered both sides: not the exercises, but a single sentence scribbled (胡写乱画) over and over.
Silently I gave it to Tommy’s mother. She read it and then handed it to her husband. Then his face softened.
At last he folded (折叠) the paper carefully, placed it in his pocket, and reached for his wife’s hand. She wiped the tears from her eyes and smiled up at him. He helped with her coat and they left together.
In his own way God had given me the words to reunite that family. He had guided me to the sheet of yellow copy paper covered with the pain outpouring of a small boy’s troubled heart.
The words are “Dear Mom… Dear Daddy… I love…”
1.How did Tommy’s parents feel after seeing the words?
A. Glad. B. Worried.
C. Moved. D. Happy.
2.The author called Tommy’s parents in order to _______.
A. blame Tommy for his failing grades
B. ask them the reason for their divorce
C. help them realize their influence on Tommy
D. solve the couple’s problem of separation
3.Why did Tommy fail his recent grades?
A. Because he was greatly influenced by his parents.
B. Because he was punished by his teacher.
C. Because he wrote to his parents very often.
D. Because he did one of his dirty, careless papers.
4.This passage is most probably written by _______.
A. a reporter B. a teacher
C. a lawyer D. a doctor
高二英语阅读理解中等难度题查看答案及解析
完形填空
I recently heard a story about a famous scientist who had made several very important medical breakthroughs (突破). He was being interviewed by a reporter who asked him 1 he thought he was able to be so much more 2 than the average person.
He responded that it all came from a(n) 3 with his mother that happened when he was about two. He had been trying to 4 milk from the fridge when he 5 the slippery (光滑的) bottle, its contents running all over the kitchen floor.
When his mother came in, 6 shouting at him or giving him a lecture, she said, "Robert, what a great and wonderful 7 you have made! I have 8 seen such a huge pool of milk. Well, the damage has already been 9 . Would you like to get down and 10 in the milk for a few minutes before we clean it up?"
His mother said, "You know, what we have here is a 11 experiment in how to carry a big milk bottle with two 12 hands. Let’s fill the bottle with water and see if you can 13 it." The little boy learned that if he 14 the bottle at the top near the lip with both hands, he could carry it without dropping it. What a wonderful 15 !
This scientist then said that it was at that moment that he knew he didn’t need to be 16 to make mistakes. Instead, he learned that mistakes were just 17 for learning something new, which is, 18 , what scientific experiments are all about. Even if the experiment "doesn’t 19 ", we usually learn something 20 from it.
1. A. why B. what C. when D. how
2.A. active B. absent C. creative D. honest
3. A. idea B. experience C. accident D. defeat
4. A. carry B. replace C. remove D. protect
5. A. fell B. lost C. escaped D. dropped
6. A. in honor of B. instead of C. in spite of D. in place of
7. A. picture B. mass C. map D. mess
8. A. rarely B. happily C. frequently D. angrily
9.A. got B. suffered C. done D. received
10. A. jump B. play C. enjoy D. handle
11.A. failed B. successful C. fantastic D. painful
12. A. strong B. tiny C. thin D. expert
13.A. get B. put C. try D. make
14. A. controlled B. analyzed C. broke D. held
15.A. cure B. teaching C. lesson D. instruction
16.A. concerned B. nervous C. athletic D. afraid
17.A. situations B. chances C. times D. turns
18. A. after all B. above all C. first of all D. in all
19. A. do B. finish C. go D. work
20.A. lovable B. severe C. valuable D. interesting
高二英语完形填空中等难度题查看答案及解析
A gray sweater hung limply on Tommy’s empty desk, a reminder of the depressed boy who had just followed his classmates from our third-grade room. Soon Tommy’s parents, who had recently separated, would arrive for a conference on his failing schoolwork and disruptive behavior. Neither parent knew that I had invited the other.
Tommy, an only child, had always been happy, cooperative and an excellent student. How could I convince his father and mother that his recent failing grades represented a broken-hearted child's reaction to his loved parent’s separation and divorce?
Tommy's mother entered and took one of the chairs I had placed near my desk. Soon the father arrived. Good! At least they were concerned enough to be on time. A look of surprise and anger passed between them, and then they pointedly ignored each other.
As I gave a detailed account of Tommy's behavior and schoolwork, I prayed for the right words to bring these two together, to help them see what they were doing to their son. But somehow the words wouldn't come. Perhaps if they saw one of his spotted, carelessly done papers.
I found a crumpled(压皱的)tear-stained sheet stuffed in the back of his desk, an English paper. Writing covered both sides—not the assignment, but a single sentence scribbled(潦草地写) over and over.
Silently I smoothed it out and gave it to Tommy's mother. She read it and then without a word handed it to her husband. He frowned. Then his face softened. He studied the scribbled words for a long time.
At last he folded the paper carefully, placed it in his pocket, and reached for his wife's outstretched hand. She wiped the tears from her eyes and smiled up at him. My own eyes were brimming(湿润的), but neither seemed to notice. He helped her with her coat and they left together.
In his own way God had given me the words to reunite that family. He had guided me to the sheet of yellow copy paper covered with the anguished outpouring(流露) of a small boy's troubled heart.
The words, "Dear Mother ... Dear Daddy ... I love you ... I love you ... I love you."
1. Which of the following word has the closest meaning to the word “disruptive”(Line3,Para.1) mean?
A. terrible B. careless C. cheerful D. good
2. What caused Tommy’s failing behavior and schoolwork fundamentally?
A. His parents’ ignorance of his education.
B. His parents’ separation and divorce.
C. His parents’ lacking love to him.
D. His parents’ firm administration to him.
3. What helped Tommy’s parents see their influence on their son?
A.A single sentence on a sheet of paper in his desk.
B.Tear stains on Tommy’s papers.
C.Tommy’s disruptive behavior.
D.A gray sweater.
4. You can infer from the passage that_________.
A. The teacher found suitable words to persuade Tommy’s parents reunite.
B. Tommy’s love to his parents saved their marriage and the whole family.
C. Tommy’s parents scheduled their time to come to school together.
D. A broken family might cause a child’s bad behavior and his shortage of love for others.
高二英语阅读理解简单题查看答案及解析
A gray sweater hung limply on Tommy’s empty desk, a reminder of the sad boy who had just followed his classmates out of our third-grade room. Soon Tommy’s parents, who had recently_______, would arrive for a conference on his _______schoolwork and bad behavior. _______parent knew that I had sent for the other.
Tommy, an (a) ______ child, had always been a happy, cooperative and excellent student. How could I ______ his father and mother that his recent failing grades represented a ______ child’s reaction to his loved parents’ separation and coming divorce?
Tommy’s mother entered and took one of the chairs I had placed near my desk.. Soon the father arrived. Good! At least they were ______ enough to be present at the meeting. A look of surprise and anger passed between them, and then they pointedly(purposely) ______ each other.
As I gave a detailed account of Tommy’s behavior and schoolwork, I prayed for the ______ words to bring these two together, to help them see what they were doing to their son. ______ somehow the words wouldn’t come. Perhaps if they saw one of his unclear ______ done papers.
I found a crumpled (褶皱的)tear-stained sheet stuffed in the back of his desk, an English paper. ______ covered both sides-not the assignment, but a single sentence scribbled(潦草的写) over and over.
______ I smoothed it out and gave it to Tommy’s mother. She read it and then without a word handed it to her husband. He frowned. Then his face ______. He studied the scrawled words for ______ seemed so long a time.
At last he folded the paper carefully, placed it in his pocket, and ______ his wife’s outstretched hand. She wiped the tears from her eyes and ______ at him. My own eyes were filled with tears, but neither seemed to notice. He helped her with her coat and they left together.
In his own way God had given me the words to ______ that family. He had guided me to the sheet of yellow copy paper covered with the ______showing(流露)of a small boy’s ______ heart.
The words, “Dear Mom ... Dear Daddy ... I love you ... I love you ... I love you.”
1.A. remarried B. separated C. left D. divided
2.A. puzzling B. encouraging C. failing D. disappointed
3.A. Neither B. Each C. Every D. Either
4.A. alone B. stupid C. fearful D. only
5.A. convince B. allow C. suggest D. promise
6.A. cold-hearted B. broken-hearted C. warm-hearted D. exited-hearted
7.A. liked B. sad C. inspired D. concerned
8.A. missed B. looked C. ignored D. fought
9.A. necessary B. grateful C. right D. helpless
10.A. Or B. But C. And D. So
11.A. carefully B. seriously C. patiently D. carelessly
12.A. Writing B. Phrases C. Tears D. Notes
13.A. Eagerly B. Secretly C. Silently D. Quickly
14.A. puzzled B. softened C. discouraged D. surprised
15.A. it B. that C. which D. what
16.A. took up B. got to C. held up D. reached for
17.A. smiled B. glanced C. laughed D. glared
18.A. help B. reunite C. support D. change
19.A. upset B. happy C. sad D. regretful
20.A. troubled B. beating C. disappointing D. moved
高二英语完形填空困难题查看答案及解析
A recent study on parents who beat their children indicated that physical punishment still occurs far more frequently than previously thought but that physical punishment was ineffective. Given that 73 percent of the children who were hit waited less than 10 minutes before acting out again.
So, what is?
Many parents deal with their children’s mistakes by taking away toys and separating them from their playmates. But for strong-willed kids like I was, none of these methods were effective.
Like many kids, I wasn’t bad; I was bored. Fortunately, my father realized this fairly early on and developed a new form of “discipline” that produced immediate results and long-term positive effects.
Looking back as an adult, my father’s method of making me read the encyclopedia (百科全书)whenever I did something wrong was the best thing he could have done.
He would tell me a topic and say, “Learn about the aardvark and I’m going to quiz you shortly after.” It was punishment in the sense that I was forced to stop whatever I was doing, but it also had a purpose in that it kept my mind occupied and presented the type of mental challenge I clearly lacked.
Although unwillingly, I went to learn absolutely everything there was to know about aardvarks because I was going to figure out every question he could throw at me. If it weren’t for my driving need to prove him wrong, it may not have worked as well as it did.
So that’s just it: It was effective. It helped me change my behavior in that moment and it conditioned me to seek out books when I was bored. Obviously, that happened frequently and apparently and it worked. I grew up to become a successful lawyer and a famous writer as well.
To this day, Dad’s the only one who can beat me.
1.What is the probable main idea of Paragraph 1?
A. It reports the result of a recent study about the encyclopedia.
B. Physical punishment is useless to deal with children.
C. Physical punishment only occurred previously.
D. 73 percent of the children love physical punishment.
2.Why do many kids frequently do what they’re not allowed to do according to
the author?
A. Because they produce immediate results and long-term positive effects.
B. Because they prefer to break the “discipline” set by their parents.
C. Because they are always regarded as bad kids both at home.
D. Because they often find it’s dull in their everyday life.
3.What was the author’s father method of punishing him for his mistakes?
A. His father angrily took away his favourite toys.
B. His father separated him from his playmates.
C. His father forced him to do some reading and tested him later.
D. His father ordered him to learn about the aardvark and quizzed him shortly after.
4.What can be inferred from this passage?
A. Children who are mentally challenged are more likely to be successful.
B. Parents ought to develop a new form of discipline to educate their kids.
C. It’s absolutely necessary to punish strong-willed kids physically.
D. The stricter parents are, the few mistakes children will make.
高二英语阅读理解中等难度题查看答案及解析
Most recently, it's very common in students who need a parent present for job interviews. Naturally, it's easy to blame the students in these situations, but the bigger problem is us. We—as parents—are so eager to shelter our kids that we fail to realize that this in itself is harming them.As the mother of two young sons, I have to remind myself constantly that the biggest responsibility I have as a parent is to help them develop the skills needed to live in, to live without me.So, I'll let them fail.
I'll let them fail because as long as they are safe and warm inside their comfort zones, they will never grow.And failure with loss, heartbreak, disappointment, etc —will be part of growth for them.Call me the anti-tiger mom, but leaving them alone is my way of helping them become equipped to fit in this world as we know it today.From terrorism and seemingly endless natural disasters, to our national debt and beyond, if we expect the next generation to stand up to the very real problems of our time, we need to stop feeding them and start teaching them how to fish.
It's a small price to help them learn a skill they'll use for the rest of their lives, including when I don't accompany them on job interviews.
1.Why do parents accompany their kids on job interviews?
A.Because they want to protect their kids from difficulties.
B.Because they think they can help them on the questions.
C.Because their kids are too shy to attend interviews.
D.Because their kids strongly request them to do so.
2.According to the author, what is beneficial to kids' development?
A.Sheltering them.
B.Keeping them safe.
C.Leaving them alone.
D.Blaming them.
3.Why does the author stress(强调) failure in kids' life?
A.To make them stronger than other kids.
B.To help them grow in this tough world.
C.To help them develop all social skills.
D.To make them learn to compromise.
4.Which of the following might be the best title for the text?
A.Never Shelter Your Kids
B.Let Your Kids Fail
C.Be Eager to Grow Up
D.Live Without Parents
高二英语阅读理解中等难度题查看答案及解析
I recently had dinner with someone who told me that one of his best friends had been killed in a private plane crash, and something happened at the memorial service that he'll never forget. He shared the story with me.
At the memorial service, his friend's wife walked to the platform to speak to the gathering. She said a friend had asked her the best memory she had of their life together. At the moment, she had been too sad to answer, but she had thought about it since and wanted to answer the question.
They were in their late forties when he died, and she began talking about a time in their life almost twenty years earlier. She had quit her job to obtain her master's degree, and her husband never hesitated in his support.
He held down his own job and also did the cooking, cleaning, and other housework while she studied for her degree.
One time they both stayed up all night. She was finishing her paper, and he was preparing for an important business meeting. That morning, she walked out of her study, leaned against the door by the stairs, looked at her husband downstairs and just thought about how much she loved him. She knew how important this meeting was to his future, and she was feeling guilty that she didn't even have time to make his breakfast. He took his briefcase and hurried out. She heard the garage door open and close, but much to her surprise, she heard it open again about thirty seconds later. From above, she watched her husband dash into the house and walk over to the forgotten coffee table. Marking the surface of it with his finger through the dust with the words "I love you", then he raced back to his car.
The new widow then looked out at her audience and said, "John and I had a wonderful life together. We have been around the world several times. We've had everything money can buy. . . but nothing comes close to that moment."
Hearing this, I was deeply moved. "Love makes life worthwhile. "
1.The service was held to _________.
A. listen to the woman's story B. express sorrow at the man's death
C. meet some old friends D. share the woman's sadness
2.Why did the woman quit her job?
A. She had to support her husband.
B. She had too much housework to do.
C. She wanted to travel around the world.
D. She needed to concentrate on her studies.
3."He held down his own job…" in Paragraph 4 means that _________.
A. he managed to keep his job B. he needed help in his work
C. he cancelled his job D. he delayed his work
4.The woman mentioned an incident 20 years ago to show _________.
A. how busy their life was B. how her husband loved her
C. how they improved their life D. how hard her husband worked
高二英语阅读理解中等难度题查看答案及解析
I teach at a university and recently had an interesting interaction with a student who approached my desk with an assignment. I watched as he _______ it from his pocket and held the crumpled (皱的) sheet out to me.
“What’s that?” I asked. His _______ : “My work.”
I was shocked. All I could do was staring at it long enough to _______ my voice.
Then I told him to redo the _______ and hand it back to me as a clean, _______ and spotless copy. As the student _______ , I picked up the merest anger.
In this case, if I have some _______ as a teacher, then this is it: quality. In the long _______ of my teaching career, I have given my students great creative freedom and _______ many extensions of deadlines. But my ________ of quality remains anchored in concrete. I have always felt that should I ________ on this one essential issue, then all is lost.
So what became of my ________ with the crumpled paper? He gave me the paper like a soldier presenting something to a king respectfully ________ a cat casually, which is why I ________ him. I called him back. We sat down together, and I ________ his draft, which was disorganized. I explained, ________ and clearly, that one’s first effort is exactly that: a start. And we took it from there, moving a paragraph, deleting the ________ words or sentences, and ________ grammar.
Once those basic things were ________ , my student asked, “Are we done?” “Not yet,” I smiled. “One last step.” I told him to read his work out loud and listen to his words. After he ________, he lowered the paper and looked at me, with his expression filled with hope.
1.A.ruined B.pulled C.blocked D.harvested
2.A.belief B.solution C.notice D.response
3.A.repair B.recover C.raise D.recognize
4.A.arrangement B.preparation C.adaptation D.assignment
5.A.obvious B.flat C.long D.sharp
6.A.panicked B.registered C.left D.remained
7.A.complaint B.celebration C.appreciation D.attraction
8.A.lesson B.distance C.course D.silence
9.A.excused B.prohibited C.required D.allowed
10.A.expectation B.assumption C.comprehension D.judgment
11.A.burst out B.cut down C.give in D.keep up
12.A.career B.teacher C.draft D.student
13.A.rather than B.or rather C.other than D.as well as
14.A.forgave B.scolded C.troubled D.influenced
15.A.torn B.introduced C.examined D.selected
16.A.hopefully B.specially C.strangely D.quietly
17.A.difficult B.unnecessary C.valuable D.unconditional
18.A.copying B.stressing C.correcting D.reviewing
19.A.handled B.listed C.enjoyed D.tested
20.A.demanded B.finished C.recorded D.settled
高二英语完形填空中等难度题查看答案及解析