单元练习3
初中英语 人教版七年级下册Unit3 单元练习(有答案)
Unit3 How do you get to school?一．短语翻译1.乘火车2.乘公交车3.乘地铁4.骑自行车5.步行6.地铁站7.认为，想起8.害怕9.实现10.在...和...之间11.一个11岁的男孩二．情景交际。
1.你想知道Jack是否走路去上学，你会怎么问他的老师？?2.你想告诉王老师你要花大约20分钟到家，你会说：3.老师想知道你家到俱乐部有多远，她会这样问：to the club?4.你想知道Mary家离学校是不是很远，你可以这样问她：?5.你想知道Lily读完Harry Potter 花了多长时间，你会这样问：To finish reading Harry Potter ? 三．连词成句1.long,take,it,him,to,from,home,how,get,school,does,his,to2.students,afraid,every,rope way,not,go,a,to,school,to,on,are,school,and,day3.to,him,for,don’t,his,number,forget,ask,phoneually,it,do,me,hour,to,takes,two,homeworkte,don’t.time,have,to,if,I,get,breakfast,have,up四．单选选择1.-- does it take her to get to school?-It takes her about minutesA. How far; twenty-fiveB. How long; twenty-fiveC. How long; twenty five2. He often goes to school his bikeA.onB. withC. by3. It takes one hour my homework every day.A. I: doB. me; to doC. me; doing4.How can you get from Xia men to Beijing?---A. With planesB. By planeC. On plane5.She often goes to school on her bike, but sometimes sheA. WalkB. walkingC. walks6.Is the bus station far your home?A. fromB. toC. of7.--- do you get to school, Emma?---I take a train.A. WhatB. WhenC. How8.How far is it from your home to school?---Sorry ，A. about 10 kilometersB. I’m not sureC. about 20 minutes9.Mr.Han has a son and he is clever .A. 3 years oldB.3-year-oldC.3-years-old10.--What do you the transportation in your town ?---Not bad .A.l ikeB.thinkC.think of五．完型填空。
四语上《练习与测试》单元练习三参考答案
一、看拼音,写词语。 xuǎn zé yuán gù cāo chǎng
选择 缘故 操场
qiáo jiàn
瞧见
xué fèi zhù zhǐ kòng xì bǐ jiào
学 费 住址 空 隙 比较
单元练习（三） 四语上《练习与测试》参考答案
二、读句子，写同音字。
单元练习（三） 四语上《练习与测试》参考答案
3.读一读文中画横线的句子，想一想:加点的词 语能不能去掉?为什么?
不能去掉。“也许”表示猜测，这里 仅是猜测，没有科学依据，体现了作者表 述的严谨和准确。
单元练习（三） 四语上《练习与测试》参考答案
4.作者对绿色蝈蝈连续观察了一段时间，介绍了
绿色蝈蝈 外形 和 吃食习性 两个方面的特 点。当它吃鲜肉时,作者称之为“ 蝉的屠夫” ;
2.俗话说“ 二八月，乱穿衣”,大街上爱美的
女士还穿着裙子，而老人们则套上了厚厚的外衣。
3.几场秋雨过后，天气逐渐变冷，正如俗语“一 场秋雨一场寒，十场秋雨要穿棉。 ”所说
的一样。
单元练习（三） 四语上《练习与测试》参考答案
六、阅读天地。
绿色蝈蝈(节选) [法国]法布尔
清晨，我在……我(跑√ 啄)了过去,那是一只 蝈蝈正在(跑 啄√ ）着处于绝境的蝉的肚子。
我明白了……有时我甚至还看到蝈蝈非常勇
敢地纵身(逃窜 追√捕)蝉，而蝉则惊慌失措地飞
起(逃√窜 追捕),就像鹰在天空中追捕云雀一样。
1.用“√”选择文中括号里合适的字词。
2.从文中找出表示下列意思的词语,写在后面的
括号里。
(1)吃得特别有兴趣。
( 津津有味 )
(2)惊慌、害怕得不知如何是好。( 惊慌失措 )
2022年秋期五上数学单元练习题(三)
五上数学（二） 第 2 页 共4 页二、判断题。
（每题1分，共5分;正确的打√，错误的打×）（ ）11.两个小数相除，商一定小于1。
（ ）12. 3.626262是循环小数 （ ）13.循环小数一定是无限小数，无限小数不一定是循环小数。
（ ）14. 2567÷2.5=25.67÷250 （ ）15.把4.3•6•保留两位小数的近似值是4.37。
三、选择题（每题1分，将正确的答案填在括号内，共5分）。
16.与120.4÷0.43商相等的算式是（ ）。
A. 1204÷43B. 12.04 ÷4.3C.12040÷4317. 7.995保留两位小数是（ ）。
A. 8.00B. 7.99C.7.90 18.小数25.416164164…的循环节是（ ）。
A. 416 B.16 C.16419.这个除法竖式中“6”表示的是（ ）。
A.6个一B.6个十分之一C.6个百分之20.要使1.05÷a ＞1.05，那么a 应该是（ ）。
A.大于1的数 B.等于1的数 C.小于1的数四、计算题（共33分）。
21．直接写出得数(8分)0.48÷0.6= 3.5÷0.05= 12.5×0.8＝ 1.5÷30= 0÷0.4= 6.24÷3= 0.72×0.3= 2.18＋0.2=五上数学（二） 第 3 页 共4 页22．计算(25分)（1）竖式计算（带※的要验算，验算每题4分，其余每题2分共16分）。
※7.14÷3.5= ※ 0.864÷0.32= 10.5÷0.75=16÷11= 1.2÷3.5≈ 1.8÷72≈（得数保留一位小数） （得数保留两位小数）（2）脱式计算9分85.4÷8÷3.5 47÷0.4÷25 40×1.45×0.5五、操作题（每题6分，共12分）。
人教英语八年级上Unit3单元练习含答案
Unit3 I’m more outgoing than my sister.单元练习一、听力(听力)（共30小题；共30分）听句子，选出与之相符的图片。
句子读一遍。
1. A. B. C.2. A. B. C.3. A. B. C.4. A. B. C.5. A. B. C.听句子，选择适当的答语。
句子读一遍。
6. A. A friend must be helpful.B. I have some friends.C. Yes, I think so.7. A. Ruth should do. B. No, she shouldn't. C. Yes, she should.8. A. Thank you. B. Yes, I should. C. Yes, I am.9. A. Tom has. B. Tom does. C. Tom is.10. A. He is very tall. B. He is outgoing. C. He is very thin. 听对话，选择正确答案。
A) 你将听到五段对话及五个问题。
每段对话及问题读一遍。
11. A. He's shorter than his brother.B. He's taller than his brother.C. He is fatter than his brother.12. A. Chinese. B. English. C. Math.13. A. He is funnier than Tom.B. He is smarter than Tom.C. He is more outgoing.14. A. A girl. B. A boy. C. A photo.15. A. Thin. B. Tall. C. Short.B) 你将听到一段对话及五个问题。
对话及问题读两遍。
16. A. They are brothers. B. They are friends. C. They are classmates.17. A. Sam. B. Tom. C. Jim.18. A. Reading books. B. Listening to music. C. Playing sports.19. A. He is outgoing. B. He is quiet. C. He is athletic.20. A. Meet Tom. B. Meet Sam. C. Meet Tom and Sam. 听短文，选择正确答案。
人教版八年级上册Unit3单元练习(有答案)
Unit3. I’m more outgoing than my sister.单元练习一、根据中文写单词。
1.2.3.4.5.6.7.8.mouth.9.10.二、用所给单词的适当形式填空。
1.10.Jimmy is the (young) of the twin brothers.三、单项选择题1.If there are _____ cars in the future, there will be _____ air pollution.A.less; lessB.fewer; lessC.fewer; fewer2.—Is Jane _____ than Jenny?—Yes, she is.A.outgoingB.more outgoingC.the most outgoing3.—_____ teachers will you miss the most after junior high school, Lisa?—Ms. Lee and Mr. Hunt.A.WhoseB.WhichC.What4.This book is as _____ as that one.A.goodB.wellC.better5."Both of the T-shirts are in style this year.""But I think this one is _____."A.popularB.much popularC.more popular6.— It's so cold today.— Yes. But it _____ yesterday.A.was more colderB.was much coldC.was much colder7.We should lead a low-carbon (碳) lifestyle to produce _____ pollution.A.lessB.fewerC.fewest8.I practice speaking English every day, but Tom doesn't. He is _____ than me.A.much hard-workingB.more hard-workingC.less hard-working9.I think listening is just as _____ as speaking in language learning.A.importantB.more importantC.more difficult10.I'm _____ outgoing than my sister.A.veryB.more muchC.much more四、语法填空The _____ (cold) and most difficult place in the world in which to live is Antarctica (南极洲). Antarctica is the land (陆地) of _____ and ice near the South Pole (南极). Most people do not think there _____ much life in the icy (结冰的) waters around it. They are wrong.Antarctica's seas are _____ of life. There are many kinds of fishes, water _____ (bird), seals and whales (鲸). They eat the thick plant life in the sea and the _____ (small) water animals. Some whales, _____ example, eat more _____ a ton (吨) of food every day.The _____ famous animal of Antarctica is the penguin (企鹅). It _____ (walk) around the icy beaches like a movie star.五、翻译下列句子1.Sam 的头发比Tom的长。
人教新目标九年级英语Unit3单元练习题（有答案）
人教新目标九年级英语Unit3单元练习题（有答案）人教新目标九年级英语Unit 3单元练习题（有答案）一、单项选择1. --- Could you tell me ?--- Of course.A. where's there a good place to eatB. where there's a good place to eatC. where is a good place to eatD. where a good place is to eat2. --- Sam, can you tell me ?--- Try Music. World on Huangyuan Street.A. why to buy a CDB. where to get a CDC. how to choose a CDD. when to record a CD3. He suggested shopping.A. goingB. wentC. goesD. go4. On my way home, I pass a fruit shop every day.A. to, byB. to, pastC.\, byD. of, for5. — Do you know______？—Yes, I do. He went by skateboarding!A．whether Paul will go or not B．when will Paul go to the partyC．how Paul went to the party D．how did Paul go to the party6. Long, long ago people didn’t know that the earth _______ around the sun.A. movesB. movedC. was movingD. move7. I really don't know if she it when she .A. will find, arrivesB. will find, will arriveC. finds, arrivesD. finds, will arrive8. be late, children got up early.A. ForB. In order toC. In order to notD. In order not to9. — What did you say just now?— I asked her .A. where is the hotelB. where the hotel isC. where was the hotelD. where the hotel was10．–Excuse me . Could you please tell me _____ my car?-- Sure . Park it right here. I’ll help youA．how to stop B．where to park C．where to stop D．when to park11．__________it rains tomorrow, we won't change our plan.A．Even if B．As C．If D．When12．–Excuse me . Could you please tell me _____ my car?-- Sure . Park it right here. I’ll help youA．how to stop B．where to park C．where to stop D．when to park 13．We need to know___________ polite requests in different situations.A．how to make B．how make C．what to make D．what make14．My parents request me__________ hard.A．study B．to study C．studying D．studies15．The math problem is so hard. I really don't know .A．how to do it B．how to do C．what to do it D．what to do二、用方框里所给词汇的适当形式填空close lead correct get rush1．He wonders if it will rain tomorrow. If it rains, the shop______________.2. Now he gets up early in the morning and never to school.3. I _______________ all my mistakes, so I think I can get good grades in the exam.4. I am looking forward to _______________ scarf for my mum.5. Everyone advised him ______________ into a request first.三、单词拼写(根据中文提示拼写单词)1. John sits (在旁边) David in class.2. I live near the supermarket, so it's very (方便的) to go shopping.3..Some (地址)on the the paper are some mistakes.4.I often go _____________ (经过)a mall when I go to work.5. When they went into the forest, the small animals ran in all (方向).6. With the help of WIFI, people can send (邮件) on theirsmart phones.7．I’m puzzled! Can you give me a _____________ (直接的) answer?8．The expressions such as “Could you please tell me…” sound much more ________ (礼貌的).9．—Can I ask you some questions？—________________（请再说一遍）？10.The ________________(建议) you give help to complete the job in time.四、六选五Many people don’t have interest in rainforests.1. ．Secondly, they seem dark and dangerous. There are snakes and dangerous plants everywhere. However, Jeff Corwin is different from most people. He has been interested in rainforests since he was a child.Rainforests produce much of the air we breathe every day. 2．_______ Since then, he has had one goal to tell people the importance of rainforests. Besides, he is most interested in the special animals living there.3．__________ Many of the animals there cannot live anywhere else. The rainforests are important to these animals, and these animals are important to the rainforests, too. They are good for the forests, as each one plays a role in keeping the rainforests healthy.Rainforests are disappearing very quickly. 4．__________ The plants and animals that used to live in these forests either die or must find a new forest as their home. The good news is that there are a lot of people who want to save rainforests. The bad news is that saving rainforests is not going to be easy. It will take the efforts of many people working together.5．_________ He has started clubs for young people. The clubs teach ways to help protect rainforests. Jeff believes education is the best way to protect rainforests. When people learn more about rainforests, they will try to help save them.A．Jeff learned this fact when he was in primary school.B．First of all, they seem so far away from us.C．People are cutting down rainforests for the following reasons.D．Jeff wants to help people understand the valuable information.E. Every year a large area of rainforests is cut down and destroyed.F. Rainforests are home to half of the animal groups in the world.五、任务型阅读The Boston Marathon is one of the world's oldest and most famous races. The first Boston Marathon began in 1897.In 1966,a woman named Gibb took part in the Boston Marathon and finished ahead of most of the men.Gibb first saw and got to know the Boston Marathon in 1964. And she wanted to run the race herself. For nearly two years, Gibb trained hard to prepare for the race.But when she sent in an application（申请）for the 1966 race, she____________(refused).At the time, the longest official races for women were only 1.5 miles. Many people didn't think women were able to run longer than that. But the 23-year-old Gibb didn't give up her dream. She came up with a plan to run the race anyway.On April 19, she showed up at the marathon. She wore herbrother's shorts and a sweatshirt to disguise that she was a woman.Gibb hid near the starting line. When the race began, she jumped into the crowd. Shortly into the race, Gibb took off her sweatshirt. To her ____________(surprised）, the crowd cheered when they realized she was a woman. Gibb finished the race in 3 hours and 21 minutes-faster than two thirds of the men.In the years that followed, she and other women ran in the Boston Marathon, even though the rules still stopped women from running in the race. Finally, in 1972,the marathon was officially opened to women.1．从文中找出与“show up”意思相反的动词。
单元练习三
A. to work
B. working
C. work
4，The majority of these team challenges ______ anywhere.
选择一项：
A. can deliver
B. are delivered
C. can be delivered
,5，I like to think ______. I am always the one finding new ways to a situation or challenge.
解析：think outside of the box为固定搭配，暗喻“跳出固有思维模式;跳脱框架思考”，相同的表达还有thinking out of the box or thinking beyond the box，所以答案是C。
3，译文：在高中，我既能作为团队一员舒心地工作，也能一个人自在地独立工作。
解析：句中的be comfortable，后接名词或动名词，所以答案是B。
4，译文：这些团队性的挑战绝大多数都是无处不在的。
解析：情态动词can表示推测，be +过去分词为被动语态。根据句意，所以答案是C。
5，译文：我喜欢跳出固有的思维模式，常常是打破现状、应对挑战发现新出路的那个人。
选择一项：
A. inside of the box
B. of the box
C. outห้องสมุดไป่ตู้ide of the box
解析
1，解析：本题考核“征求允许”的交际用语。常用的答语一般有Sure/Of course/No problem等表示同意。根据第一说话人传递的信息，这是征求允许，所以答案是B。
新人教版七年级英语上册《Unit3 Is this your pencil》单元练习(附答案)
Unit3 Is this your pencil?单元练习一、听力(听力)（共15小题；共15分）I. 听句子，选出适合每个句子的最佳答语。
1. A. Yes, I am. B. Yes, she is. C. No, he isn't.2. A. Yes, these are. B. Yes, he is. C. No, they aren't.3. A. Yes, he's my cousin. B. No, he isn't. C. Yes, she is.4. A. Green. B. Bob. C. Bob Green.5. A. An orange. B. Red. C. A red pen.II. 听对话，选出适合每个句子的答语。
6. Anna is Lily's .A. sisterB. friendC. cousin7. is Alice's sister?A. AnnaB. LindaC. Kelsey8. Sally is Frank's .A. cousinB. daughterC. aunt9. Nick is Jenny's .A. brotherB. fatherC. uncle10. Is the jacket Bob's?A. Yes, it is.B. No, it's Frank's.C. No, it's Jack's.III. 听短文，选出能回答每个问题的正确答案。
11. What's Alan's last name?A. Green.B. White.C. Black.12. What color is Alan's schoolbag?A. Green.B. Black.C. White.13. Who is Jenny?A. She's Alan's friend.B. She is a teacher.C. She's Alan's sister.14. Are the keys Alan's?A. Yes, they are.B. No, they aren't.C. I don't know..15. What's Alan's phone number?A. 687-5926.B. 123-5926.C. 687-6636.二、单项选择（共8小题；共8分）16. --- Is this your watch the Lost and Found, Jack?--- Yes, .A. at, it'sB. in, it isC. in, this isD. for, it is17. --- the notebooks in the box?--- Yes, .A. Are; they areB. Is; it isC. Are; those areD. Is; that is18. --- Are these his pencils?--- . They are my pencils.A. Yes, they areB. No, they aren'tC. Yes, these areD. No, these aren't19. --- Are these your grandparents?--- .A. Yes, these areB. Yes, they'reC. Yes, they areD. Those are20. You have more pencils than . But are nicer than .A. I; mine; yoursB. I; my; yoursC. I; mine; youD. me; mine; your21. The comic books aren't . They are .A. his; hersB. her; hisC. hers; heD. our; his22. This is chair, is over there.A. my; yoursB. mine; yoursC. mine; yourD. yours; mine23. Her opinion is different from , but I really agree with .A. his; herB. hers; hersC. his; hersD. him; hers三、单词拼写(单句首字母填空)（共8小题；共8分）24. --- What's this in English?--- It's an e .25. Miss. Zhang teaches us math. She is our favorite t .26. She says she will h me with my English next year.27. Everyone can play the c games in my class.28. In our school, students often read books in the school l .29. There are thirty students in the c . They are having a class meeting.30. Let's go and f them.31. --- Thank you for your advice, Jenny.--- You're w .四、单词拼写(根据中文提示拼写单词)（共8小题；共8分）32. Where did you get that new (字典)?33. Is this your (电脑) game?34. Where are the (图书馆)?35. Every day the little boy (询问) his parents many questions.36. May I have your (橡皮)?37. Kate's father likes playing (棒球).38. Is this your (手表)?39. We often play (游戏) in the park.五、完形填空（共5小题；共7分）Dictionaries are very useful books. People use dictionaries to 40 out the meaning of words. If you are learning English, you would use an English dictionary. Some students have dictionaries. Their dictionaries contain(包含) Chinese and English words. They are useful, but it is usually 41 to use a dictionary written completely 42 English. This will help you to begin to think in English. A good English dictionary will show you the correct spelling of a word and its 43 . Many dictionaries also show 44 a word is used in sentences.40. A. take B. find C. hand D. send41. A. good B. well C. nice D. better42. A. in B. about C. with D. for43. A. spelt B. spell C. pronounce D. pronunciation44. A. what B. why C. how D. when六、阅读理解（共15小题；共30分）AMost things can not be enjoyed without friends, but reading can. While sitting alone in our house we can travel around the whole world, and we can understand the reason for thousands of things. Living today, we can talk with those who lived thousands of years ago. We can become the friends of clever men. Only books give us this happiness. Those who can't enjoy them are poor men. Those who enjoy them most get the most happiness from them.45. If he has no friends together, one can .A. have a sleepB. have a wonderful timeC. read some booksD. play football well46. After we read some books, we canA. know a lot of things in the worldB. do a lot of things for the people in the worldC. write some good articles very well ,tooD. travel over the world47. What can make us know the history of the past when we sit in our house?A. SittingB. ReadingC. ThinkingD. Writing48. The more books we read, .A. the more careless we willB. the stranger we lookC. the more foolish we getD. the clever we become49. Which of the following is correct?A. Reading makes one sleepyB. One who reads lots of books is a poor manC. Reading is a great happinessD. One who reads a lot of books is a great manBSome children wish to be writers some day. They want to write stories or books for people to read. That's good! It's good to write something for people to read! But they should know that they need to be good readers first before they are really good writers. They should read a lot of books, instead(代替) of watching TV and spending a lot of time playing games when they are free.There is more fun in reading, you want to look for more books to read.Before you decide(决定) to be a good writer, you'd better say to yourself, "I must read more and more!"50. This article mainly tells us that .A. some children wish to be writers some dayB. it is good to write something for people to readC. reading can be helpful for us to become a good writerD. writers like to read more books for fun51. Some children want to be writers .A. because they want to be good readersB. to write stories or books for people to readC. to find good work some dayD. to get more money to keep a family52. It's good for children .A. to do a lot of readingB. to watch TV in the eveningC. to have wishes onlyD. to be good writers right now53. Reading can .A. help you to be a good playerB. help you write wellC. make you work betterD. make you watch more TV at home54. From the passage we know that .A. all children like to be writersB. people like to read for childrenC. all writers are childrenD. children need to read more and more booksCIn this summer holidays, some students in England will go to schools for two-week lessons. The names of these schools are "brain training camps". They want to help 65,000 children from poor families to study better when they start secondary school in September. This is because the government says thatstudents from poor families often don't do well at school, so they need a few extra lessons. The school summer camps will have English, math, art, music and sports lessons.An officer(官员) said, "Students can learn many things in these two weeks in the summer holidays."55. The lessons in the "brain training camps" are for about .A. two daysB. two yearsC. two weeksD. two months56. The students who will go to the "brain training camps".A. are from poor familiesB. don't study wellC. are from rich familiesD. are not clever57. In England, secondary school starts in .A. JulyB. AugustC. SeptemberD. October58. From the passage, we know that the students from poor families usually .A. study wellB. don't study wellC. have good lifeD. have poor food59. There is no lesson in the school.A. EnglishB. mathC. musicD. computer七、阅读与表达(判断式)（共5小题；共10分）Snapper feels it isn't fair. He has too many rules in his house. He has to get up at five o'clock every morning. He can't meet his friends after school because he has to stay at home and look after his little sister. He can't watch TV on school nights. And he has to be in bed by nine thirty in the evening.On weekends, he has to help his mum with housework. He has to make his bed and clean their house. Sometimes he has to wash the dishes. He says he never has any fun.根据短文内容，判断正误，正确的为T，错误的为F。
人教版英语九年级Unit3单元练习(含答案)
Unit3 Could you please tell me where the restrooms are?单元练习一、听力(听力)（共20小题；共20分）（一）录音中有五个句子，每个句子听一遍，然后从每小题A、B、C中选出能对每个句子做出适当反应的答语。
1. A. It's yellow. B. It's round. C. It's sunny.2. A. Yes, please. B. Sure. C. You, too.3. A. Good night. B. Never mind. C. It's a pleasure.4. A. That's lovely.B. Just a little, please.C. I have a cough.5. A. B. C.（二）录音中有五组对话，听对话两遍后，从每小题A、B、C中选出能回答所给问题的正确答案。
6. Where did the woman stay recently?A. Beijing.B. Kunming.C. Shanghai.7. Where is the man going?A. The supermarket.B. His new house.C. We don't know.8. Who likes reading alone?A. Jim.B. Mary.C. Sarah.9. Whose birthday is it?A. Bob's.B. Julia's.C. John's.10. Why is snow bad news for the man?A. He can't go home.B. He lost his hat and gloves.C. He does not have his hat and gloves with him.（三）录音中有一段话，听对话两遍后，从每小题A、B、C中选出能回答所给问题的正确答案。
人教版】七年级英语上册：Unit3单元练习(含答案)
人教版】七年级英语上册：Unit3单元练习(含答案)Unit 3 Is This Your Pencil。
- Practice ExercisesI。
Multiple Choice (15 ns。
15 points)1."Is this your jacket?"Yes。
it is."2."Are the XXX?"No。
they aren't。
They are my pencils."3."Are these his pencils?"No。
they aren't."4."XXX?"Yes。
they are."5.These are our XXX.6."Is that colourful pencil-box Bob's?"No。
it isn't hers。
It's his."Note: No paragraphs XXX.)7.You have more pencils than she does。
But hers are XXX.8.XXX't good。
They are bad.9.--- Are these oranges?No。
they are apples.10.--- Is that your pencil case?No。
it's his pencil case.11.--- Are these your grandparents?Yes。
they are.12.--- Are those your books?Yes。
they are XXX.13.XXX.14.--- Is this Tom's book?No。
it isn't his。
It's mine.D。
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一．判断题（下列各题，正确的请在前面的括号内打√；错误的打╳）
（√）
（1）栈是运算受限制的线性表。
（2）（√）（2）在栈空的情况下，不能作出栈操作，否则产生下溢出。
（3）（ㄨ）（3）栈一定是顺序存储的线性结构。
（4）（√）（4）栈的特点是“后进先出”。
（5）（ㄨ）（5）空栈就是所有元素都为0的栈。
（6）（ㄨ）（6）在C或C++语言中设顺序栈的长度为MAXLEN，则top=MAXLEN时表示队满。
（7）（√）（7）链栈与顺序栈相比，其特点之一是通常不会出现栈满的情况。
（8）（ㄨ）（8）一个栈的输入序列为：A，B，C，D，可以得到输出序列：C，A，B，D。
（9）（ㄨ）（9）递归定义就是循环定义。
（10）（√）（10）将十进制数转换为二进制数是栈的典型应用之一。
二．填空题
（1）在栈结构中，允许插入、删除的一端称为栈顶。
（2）在顺序栈中，当栈顶指针top=-1时，表示栈空。
（3）在有n个元素的栈中，进栈操作的时间复杂度为 O（1）。
（4）在栈中，出栈操作的时间复杂度为： O(1) 。
（5）已知表达式，求它的后缀表达式是栈的典型应用。
（6）在一个链栈中，若栈顶指针等于NULL，则表示栈空。
（7）向一个栈顶指针为top的链栈插入一个新结点*p时，应执行 p->next=top；和top=p；操作。
（8）顺序栈S存储在数组 S->data[0..MAXLEN-1]中，进栈操作时要执行的语句有：
S->top ++ 。
（或= S->top+1）
（9）链栈LS，指向栈顶元素的指针是 LS->next 。
（10）从一个栈删除元素时，首先取出栈顶元素，然后再移动栈顶指针。
（11）由于链栈的操作只在链表的头部进行，所以没有必要设置头结点。
（12）已知顺序栈S，在对S进行进栈操作之前首先要判断栈是否满。
（13）已知顺序栈S，在对S进行出栈操作之前首先要判断栈是否空。
（14）若内存空间充足，链栈可以不定义栈满运算。
（15）链栈LS是空的条件是 LS->next=NULL 。
（16）链栈LS的栈顶元素是链表的首元素。
（17）同一栈的各元素的类型相同。
（18）若进栈的次序是A、B、C、D、E，执行三次出栈操作以后，栈顶元素为 B 。
（19）A+B/C-D*E的后缀表达式是： ABC/+DE*- 。
（20）四个元素按A、B、C、D顺序进S栈，执行两次Pop（S，x）运算后，x的值是 C 。
三．选择题
（1）插入和删除只能在一端进行的线性表，称为( C )。
A．队列 B．循环队列 C．栈 D．循环栈（2）设有编号为1，2，3，4的四辆列车，顺序进入一个栈结构的站台，下列不可能的出站顺序为 ( D )
A．1234 B．1243 C．1324 D．1423 （3）如果以链表作为栈的存储结构，则出栈操作时（ B ） A．必须判别栈是否满 B．必须判别栈是否空 C．必须判别栈元素类型 D．队栈可不做任何判别（4）元素A,B,C,D依次进栈以后，栈顶元素是（ D ） A．A B．B C．C D．D （5）顺序栈存储空间的实现使用（ B ）
A．链表 B．数组 C．循环链表 D．变量（6）在C或C++语言中，一个顺序栈一旦被声明，其占用空间的大小（ A ）。
A．已固定 B．不固定 C．可以改变 D．动态变化
（7）带头结点的链栈LS的示意图如下，栈顶元素是（ A ） LS
H A B C D Λ
A．A B．B C．C D．D （8）链栈与顺序栈相比，有一个比较明显的优点是（ B ）。
A．插入操作更加方便 B．通常不会出现栈满的情况。
C．不会出现栈空的情况 D．删除操作根加方便（9）从一个栈顶指针为top的链栈中删除一个结点时，用x保存被删除的结点，应执行下列 ( D )命令。
A．x=top;top=top->next; B．top=top->next;x=top->data; C．x=top->data; D．x =top->data;top=top->next;
B．（10）在一个栈顶指针为HS的链栈中，将一个S指针所指的结点入栈，应执行下列 ( B )命
令。
A．HS->next=S; B．S->next=HS->next;HS->next=S; C．S->next=HS->next;HS= S; D．S->next=HS;HS=HS->next;
C．（11）四个元素按A、B、C、D顺序进S栈，执行两次Pop（S，x）运算后，栈顶元素的值是（ B ）。
D． A．A B．B C．C D．D （12）元素A,B,C,D依次进栈以后，栈底元素是（ A ）。
A．A B．B C．C D．D （13）经过下列栈的运算后，再执行ReadTop(s)的值是（ A ）。
InitStack(s) （初始化栈）;Push(s,a);Push(s,b); Pop(s)
E．A．a B．b C．1 D．0 （14）经过下列栈的运算后，x的值是（ B ）。
F． InitStack(s) （初始化栈）;Push(s,a);Push(s,b); ReadTop(s);Pop(s,x);
G．A．a B．b C．1 D．0 （15）经过下列栈的运算后，x的值是（ B ）。
InitStack(s) （初始化栈）;Push(s,a);Pop(s,x);Push(s,b);Pop(s,x);
H．A．a B．b C．1 D．0 （16）经过下列栈的运算后，SEmpty(s)的值是（ C ）。
InitStack(s) （初始化栈）; Push(s,a); Push(s,b);Pop(s,x); Pop(s,x);
I．A．a B．b C．1 D．0 （17）向顺序栈中压入元素时，（ B ）。
J．A．先存入元素，后移动栈顶指针 B．先移动栈顶指针，后存入元素
K．C．谁先谁后无关紧要 D．同时进行（18）初始化一个空间大小为5的顺序栈S后，S->top的值是（ B ）。
L． A．0 B．-1 C．不再改变 D．动态变化
M．（19）一个栈的入栈次序ABCDE，则栈的不可能的输出序列是 ( C )。
N． A．EDCBA B．DECBA C．DCEAB D．ABCDE （20）设有一个顺序栈S，元素A,B,C,D,E,F,依次进栈，如果六个元素出栈的顺序是B，D，C，F，E，A，则栈的容量至少应是 ( A )。
O． A．3 B．4 C．5 D． 6
P．四．设有一个栈，元素进栈的次序为：A，B，C，D，E，用I表示进栈操作，O表示出栈操作，写出下列出栈的操作序列。
（1）C，B，A，D，E （2）A，C，B，E，D 解：（1）IIIOOOIOIO （2）IOIIOOIIOO。