新人教版2016-2017学年度第二学期七年级英语下册期中测试及答案七年级数学下册期中测试卷
2016至2017学年下学期七年级期中学业水平考试七年级英语下册期中试卷人教版试题下载
2016至2017学年下学期七年级期中学业水平考试试题预览2016至2017学年下学期七年级期中学业水平考试听力略( )16. A. football B. comput games C. basketball( )17. A. Aunt B. Uncle C. Father( )18. A.watching TV B. reading newspaper C. doing the dishes( )19. A.Friend B. Brother C. Classmate( )20. A. nurse B. teacher C. student第二部分英语知识应用（共三节，满分25分）第一节、词语释义。
（共10小题，每小题1分，满分5分）( )21 .--- Thank you very much.--- You are welcomeA. That’s all rightB. OKC. You’re rightD. No, thanks.( ) 22. Jake is from the CanadaA. come fromB. comes fromC. is come fromD. Does come from( )23. The EXPO Garden is a good place to have fun.A playB take a walkC go shoppingD have a good time( ) 24 .English is too hard for the most students.A funB easyC difficultD boring( )25 .My mother always goes shopping on Sundays.A goes to schoolB goes to workC buys thingsD goes to the park第二节、单项选择。
人教版七年级英语下册期中试卷及答案
七年级英语下册期中模拟试卷附参考答案Ⅰ．听力部分（共25分）一．听句选图。
请听句子，选出相应的图画。
（5分）二.请听句子，选答语（5分）6.（）A. At school. B. In the school C. Yes, I can7.（）A. No, I’m not B. walking C. May 1st8.（）A. Friday B. English C. Comedy9.（）A. In Tokyo B. The music club C. July10.（）A. Yes, I do B. At 6:00 C. Because it’s interesting三．对话理解。
请听对话及问题，选出最佳答语。
(5分)11.( ) A. It' s raining. B. It' s windy. C. It' s snowing.12.( ) A. A reporter. B. An actor. C. A waiter.13.( ) A. In a police station. B. In a restaurant. C. In a mall.14.( ) A. Yes, Tony does. B. Yes, they do. C. No, they don’t15.( ) A. All over the world. B. In China. C. In other countries all over四．短文理解。
请听短文，选择正确答案。
（5分）( ) 16.Today is .A. Sunday morningB. Saturday morningC. Sunday afternoon( ) 17.How' s the weather there?A. It's windy.B. It' s cloudy.C. It’s s sunny.( ) 18.There are many people from .A. England and CanadaB. America and JapanC. Canada and Australia（）19．The driver is .A. an AmericanB. a ChineseC. a man（）20.People in the bus.A.are reading newspaperB. want to play basketballC. are listening to a man五.听短文，完成下列表格。
2016-2017学年下期期中七年级英语试题(含答案)
2016-2017学年下期期中学业水平测试七年级英语试题卷注意：本试卷分试题卷和答题卡两部分，试题卷共十页，七道大题，答题卡共两页。
考试时间90分钟，满分120分。
考生应首先阅读答题卡上的文字信息，然后在答题卡上作答，在试题卷上作答无效。
交卷时只交答题卡。
一、听力理解（20小题，每小题1分，共20分）第一节听选答语，根据你听到的问句，从题中所给的A、B、C三个选项中选出最佳答案，并在答题卡上将该项涂黑。
每个句子读两遍。
1. A. I’m reading. B. I climbed hills. C. I usually fly kites.2. A. I can play soccer. B. The bridge is on your right.C. The phone is on the teacher’s desk.3. A. It’s about five kilometers. B. It takes about two days.C. Change to the No. 3 bus at Gorge Bridge.4. A. Thanks a lot. B. Sorry, I won’t. C. It’s my pleasure.5. A. Because it’s boring. B. Because it’s difficult. C. Because it’s interesting.第二节听下面5段对话,每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳答案,并在答题卡上将该项涂黑。
每段对话读两遍。
6. Who will teach the girl to swim?A. Her aunt.B. Her sister.C. Her mother.7. How far is the gym from here?A. It’s next to the park.B. It’s half a kilometer.C. It’s one and a half kilometers.8. Which is the girl’s favorite room?A. The bedroom.B. The bathroom.C. The living room.9. What is the girl doing now?A. She is watching TV.B. She is doing her homework.C. She is playing computer games.10. What time does Mary get up on Sundays? A. At 6:30.B. At 7:00.C. At 7:30.第三节听下面一段对话和一段独白。
七年级2016-2017学年度第二学期期中检测(英语)
七年级2016-2017学年度第二学期期中检测(英语)I、单选题(本大题共10小题，共10.0分)21.Tom likes playing _____football, but his sister likes playing_____piano.A.the; /B./; theC./; /D.the; the22.— __________English every morning?—Yes, but now I ___________ Chinese.A.Are you reading; readB.Do you read; readC.Do you read; am readingD.Are you reading; am reading23.—I am sorry I can’t help you ________ your maths.—Thank you all the same. I can ask Millie ___________ help.A.with; forB.for; withC.about; forD.with; to24.—I am good at singing, and I am going to be a singer.—That _________a good idea.A.seems likeB.looks likeC.sounds likeD.smells like25.Our English teacher is strict us and she is strict her work.A.in;withB.at;withC.with;inD.for;at26.Either you or he ________ a shower first.A.takeB.takesC.to takeD.taking27.Dogs are________ .They are people's________ .A.friend; friendlyB.friends; friendlyC.friendly; friendD.friendly; friends28.The sign means “______”.A.ParkingB.DangerC.Turn leftD.Crosswalk29.—Isn’t it cute?—_______. I like it very much.A.Yes，it isn’tB.Yes，it isC.No, it isn’t.D.No,it is30.— Don’t run in the hallways.—______, I won’t do it again.A.SorryB.Excuse meC.Thank youD.It doesn’t matterIII、完形填空(本大题共10小题，共15.0分)Mr. Brown is 75 years old. He lives with his daughter’s family. Every morning he goes to31 in the park. And at twelve thirty he32 home for lunch. But today a33 car stopsat his house at twelve. Two policemen help him get out. One of34 says to Mr. Brown’sdaughter, “The old man can’t find his35 in the park. He calls us to take him to36 in ourcar.” The daughter37 the policemen and the policemen leaves. Then she asks her38 ,“You go to that park to walk every day and you39 lose your way. But today, you can’t findthe way. What’s wrong with you?” “I can find my way. I just don’t40 to walk home today,”the old man says and smiles like a child.31.A.walk B.sing C.dance D.read32.A.cleans es C.thinks D.crosses33.A.police B.school C.hospital D.restaurant B.you C.them D.theirs35.A.way B.car C.bike D.wallet36.A.hospital B.restaurant C.bus stop D.his home37.A.asks B.helps C.teaches D.thanks38.A.mother B.father C.son D.daughter39.A.always B.sometimes C.often D.never40.A.know B.show C.want D.talkIV、阅读理解(本大题共20小题，共40.0分)AAThere is a new park near Andy's home. It's fine today. Andy and his family are in the parknow. On their left, there is a café(咖啡馆). On their right, there is a big lake. There are manyflowers and trees around the lake. There's a small hill behind the lake. Near the lake, thereare two signs. One says, "Don't swim in the lake!" The other says, "No fishing!" But you cango boating in the lake. There is a beautiful garden in the middle of the park. There is greengrass and beautiful flowers in it. There are some small shops between the lake and thegarden. The park is so nice. Andy and his family like it very much.41.The park near Andy's home is old but clean.A.TB.F42.The small hill is behind the lake.A.TB.F43.People can swim in the lake.A.TB.F44.The shops in the park are not small.A.TB.F45.Andy and his family are boating in the park.A.TB.FBBDo you know that man? He is my uncle. His name is David Smith. He is forty-eight this year. He is a worker. He works in a Car Factory. His factory is not near his home. So he getsup early in the morning and takes a bus to work. At about seven thirty, he gets to his factory. He makes the parts (零件) of the car. He makes many every day. He works very hard. Everyone likes him and says he is a good worker. He has his lunch in the factory. He often plays basketball after work. In the evening, he learns Chinese at home. His Chinese is good, too. Sometimes he helps me with my Chinese. I like my uncle very much.46.That man is ________________.A.a teacherB.a bus driverC.a worker47.He ______________________________.A.works in a Car FactoryB.learns Chinese in the factoryC.helps me with my Chinese every day48.He goes to work __________________.A.by busB.on footC.by taxi49.He _________________ in the factory.A.has dinnerB.plays basketballC.eats lunch50.Which is not right?A.Everyone likes my uncleB.My uncle can speak ChineseC.My uncle is very lazy in the factoryCCA French woman goes to London to see her son. She knows a little English, but can not speak it very well. One day she goes to a shop. She wants to buy a hen(母鸡) for supper. But she can not remember the English word for “hen”. Just then the shop waiter asks her: “Can I help you?” “I want the egg’s mother ”the woman answered. The shop waiter does not understand her and says: “Sorry, we have not any bigger eggs.” Suddenly(突然) the woman remembers the word “cock(公鸡)”.She says: “I want the cock’s wife!” This time the shop waiter laughs.51.The woman goes to London_______.A.to learn EnglishB.to have supperC.to see her son52.The woman________.A.only knows a little EnglishB.knows much EnglishC.doesn’t know English53.The shop waiter think the egg’s mother must be”_______”.A.bigger eggsB.the cock’s wifeC.hens54.The shop waiter laughs because he ________.A.understand the woman at lastB.think it is interestingC.does not understand the woman55.Is the woman clever?A.Yes, he isB.No,she isn’tC.Yes, she is.DDA.3:30 p.m.B.4:00 p.m.C.5:00 p.m.D.7:00 p.m.57.We can only ______ on Sunday.A.watch the soccer gameB.watch the stamp showC.watch the moviesD.go to the evening party58.The evening party can last(持续) ______ hours.A.fourB.sevenC.eightD.thirteen59.We can ______ at 6:00 p.m. on Saturday.A.see the movie “My Aunt”B.watch the stamp showC.go to the partyD.see the movie “Panda Jingjing”60.Which is WRONG?A.The soccer game is between Class Two and Class Three.B.At 10:00 a.m. on Sunday we can watch the stamp show.C.We can dance and sing at the evening party.D.We can watch the stamp show on the school playground.V、补充句子(本大题共5小题，共10.0分)61.玛丽经常帮我学英语。
2016_2017学年七年级英语下学期期中质量检测试题
2016-2017学年七年级英语下学期期中质量检测试题注意事项：注意事项：1．全卷共10页，满分150分，由卷I （100分），卷II II（（50分）组成，答题时间为120分钟。
分钟。
2．请将卷I 的答案填到答题栏内相应的位置，卷II 的答案直接写在试卷上。
的答案直接写在试卷上。
卷Ⅰ（共四部分，满分100分）分）第一部分第一部分 听力（共四节，满分听力（共四节，满分20分）分）第一节第一节 听句子（共听句子（共5小题，每小题1分，共5分）分）根据所听的内容，选择符合题意的图画，并将最佳选项的番号填入卷I 答题栏内相应的位置。
每小题念两遍。
每小题念两遍。
( )1． A ． B ． C ．( )2． A ． B ． C ．( )3． A ． B ． C ．( )4． A ． B ． C ．( )5． A ． B ． C ．第二节第二节 听小对话听小对话听小对话,,选答案（共5小题，每小题1分，共5分）分）听下面对话，回答每段对话后面的问题，在各题所给的三个选项中选出一个最佳答案，并将其番号填入卷I 答题栏内相应的位置。
每段对话念两遍。
答题栏内相应的位置。
每段对话念两遍。
( ) 6．Whose book is it?A ．Lisa`s.B ．Mark`s.C ．Alice`s.( ) 7．What does the man want to visit in London?A ．Parks.B ．Museum.C ．Cinema.( ) 8．How long will it take the woman to get to the bank?A ．About 5 minutes.B ．About 15 minutes.C ．About 25 minutes.( ) 9．What is the boy good at?A ．Swimming.B ．Football.C ．Basketball.( ) 10．What`s the weather like tomorrow?A ．Rainy.B ．Windy.C ．Snowy.第三节第三节 听长对话听长对话听长对话,,选答案（共5小题，每小题1分，共5分）分）听下面对话，回答每段对话后面的问题，在各题所给的三个选项中选出一个最佳答案，并将其番号填入卷I 答题栏内相应的位置。
2017春人教版七年级英语下期中试卷含答案
2016~2017学年第二学期七年级英语期中测试(时间：100分钟，满分：100分)Ⅰ.单项选择。
(每小题1分，共15分)1. I have ________ pet cat. It is so cute.A．a B．an C．the D．/2.—What time do you usually get up ________Sunday morning?—________eight o'clock.A．on；At B．at；In C．at；On D．in；For3.—What do you think of your math teacher?—She is ________with us. We all like her very much.A．boring B．scary C．strict D．lazy4.—Can I listen to music here?—________，but you can listen in the music classroom.A．Yes，you can B．Of course C．No problem D．No，you can't 5.—You like to play chess.________ don't you join the chess club?—That sounds great.A．Who B．Why C．When D．Where6.—Do you like lions?—No. I think they are ________scary.A．any B．many C．kind o f D．kinds of7. Be quiet！The baby ________.A．sleeps B．slept C．are sleeping D．is sleeping8.Eat more vegetables. They are good ________you.A．for B．at C．to D．with9.—________run in the hallways.—________, Ms. White.A．Don't；No B．Don't；Excuse me C．Don't；Sorry D．Do；Thank you 10.—Jack, do you like singing ________ dancing?—I like singing.A．and B．or C．but D．so11.—Don't forget ________your history and Chinese books tomorrow morning. —Thanks. I won't.A．bring B．brings C．bringing D．to bring12.—Susan，would you like to go shopping with us this afternoon?—I'd love to，but I ________study for a test.A．may B．have to C．can D．has to13.—The ice cream ________ very nice.—Yeah！But you can't eat too much.A．tastes B．feels C．sounds D．listens14.—Is Rick good with his brother?—Yes，they ________ fight.A．usually B．sometimes C．always D．never15.—I'm going to Ann's birthday party. Bye, mom.—________，Jack!A．Have fun B．No problem C．Best wishes D．Take careⅡ.完形填空。
人教版七年级英语下期中测试卷(含参考答案)
人教版七年级英语下期中测试卷(含参考答案)一、根据所述内容，选出正确答案，每个问题读两遍（每小题1分，共10分）。
1.What is Sandy's name?A。
My name is Sandy.B。
It is an eraser.C。
Yes。
I can.D。
It XXX.E。
I XXX.2.What is it?A。
My name is Sandy.B。
It is an eraser.C。
Yes。
I can.D。
It XXX.E。
I XXX.3.Can you swim?A。
My name is Sandy. B。
It is an eraser.C。
Yes。
I can.D。
It XXX.E。
I XXX.4.How much is it?A。
My name is Sandy. B。
It is an eraser.C。
Yes。
I can.D。
It XXX.E。
I XXX.5.What do you like? A。
My name is Sandy. B。
It is an eraser.C。
Yes。
I can.D。
It XXX.E。
I XXX.6.How do you do?A。
How do you do?B。
10:45C。
On footD。
Having XXXE。
7:307.What time is it?A。
How do you do?B。
10:45C。
On footD。
Having XXXE。
7:308.How do you go to school? A。
How do you do?B。
10:45C。
On footD。
Having XXXE。
7:309.What are you doing?A。
How do you do?B。
10:45C。
On footD。
Having XXXE。
7:3010.What club do you want to join?A。
How do you do?B。
2016-2017学年度第二学期七年级英语下期中试卷
2016-2017学年度第二学期七年级英语下期中试卷推荐文章秋季学期七年级英语期中试卷热度：七年级上学期英语期中考试试卷热度：七年级秋季学期英语期中试卷题热度：初一年级英语上学期期中试卷热度：七年级英语上册期中试卷带答案热度：良好的心态对待七年级英语期中考试，相信自己是最棒的，也是不可征服的。
下面由店铺为你整理的2016-2017学年度第二学期七年级英语下期中试卷，希望对大家有帮助!2016-2017学年度第二学期七年级英语下期中试题一.听力(每小题1分，共20分)第一部分听对话回答问题。
本部分共有10道小题，每小题你将听到一段对话，每段对话读两遍。
听每段对话或短文前，你将有时间阅读相关小题，每小题5秒钟;听完后，每小题你仍有5秒钟的时间选择你认为最合适的备选答案。
1. How does her father go to work?A. B. C.2. Where is the man’s pen friend fro m?A. B. C.3. What does Walter do after work?A. B. C.4. What is Jack going to be when he grows up?A. B. C.5. When will the film begin?A. At 6:30.B. At 7:00.C. At 7:30.6. What will the boy do tomorrow?A. Do his homework.B. Go to work.C. Do his housework.7. Where does the boy have lunch?A. In the restaurant.B. At home.C. At school.8. What does the man want to do?A. Climb hills.B. Go fishing.C. Go shopping.9. What will the girl do this afternoon?A. Have a party.B. Visit the old people.C. Go shopping.10.When is the man's birthday?A. On April 30th .B. On May 1st .C. On May 2nd .第二部分听对话和短文答题。
2016-2017年度第二学期七年级英语期中试卷
2016-2017学年第二学期七年级英语期中试卷听力部分一、听句子，根据所听内容选择对应的信息。
句子读两遍。
(每小题1分，共5分)1. A. tigers B. pandas C. elephants2. A. late B. smart C. strict3. A. think B. forget C. remember4. A. shy B. scary C. friendly5. A. cut down B. get lost C. come from二、听对话，根据所听内容选择正确的答案。
对话读两遍。
(每小题1分，共5分)6. What animals does Kate want to see?A. Lions.B. Koalas.C. Giraffes.7. Whose(谁的) cat is it?A. Anna‟s.B. Anna‟s sister‟s.C. Paul‟s sister‟s.8. What does Eric think ofthe dog?A. It‟s very cute.B. It‟s kind oflazy.C. It‟s kind of shy.9. Why does the girllike Molly?A. Because she‟s beautiful.B. Because she‟s smart.C. Because she‟s friendly.10. Where do the animals come from?A. Australia.B. Thailand.C. South Africa.三、听对话，根据所听内容选择正确的答案。
对话读两遍。
(每小题1分，共5分)听第一段对话，回答第11－12小题。
11. Where are Mary and Jack?A. In a school.B. In a library.C. In a zoo.12. What does Mary think ofkoalas?A. They are cute.B. They are scary.C. They are-smart.听第二段对话，回答第13－15小题。
2016—2017学年度第二学期期中七年级英语试卷(含答案)
2016—2017学年度第二学期期中试卷七年级 英语本试卷含听力，满分为120分，考试时间为120分钟听力部分Ⅰ.听力（分六小节，共30小题；每小题1分，满分30分） 第一节．听句子，选出句子中所包含的信息。
(读两遍) ( ) 1. A. cheese B. chance C. chess ( ) 2. A. problem B. product C. project ( ) 3. A. fire B. free C. fine ( ) 4. A. grade B. guitar C. guide ( ) 5. A. sell B. sale C. still 第二节．听句子，选出该句的最佳答语。
(读两遍)( ) 6. A. Have a good trip. B. When will you come back? C. Who will go with you?( ) 7. A. It ’s about a week. B.I missed you very much. C. It was great. ( ) 8. A. I don ’t need. B. Three. C. I want to buy them on the train. ( ) 9. A. Thank you. B. How much is it? C. I don’t want it. ( ) 10. A. It doesn ’t matter B. Sorry, I won ’t. C. I don ’t think so. 第三节．听对话和问题，选择正确的图片。
(读两遍) ( ) 11.A. B. C.( ) 12.A. B. C.( ) 13.A. B. C.( ) 14.A. B. C.( ) 15.A. B. C.第四节．听短文，选择正确的答案。
(读两遍) ( ) 16. Anna is from ________.A. CanadaB. AmericaC. France ( ) 17. Anna wants to go to China for ________.A ．a month B. a year C. a week ( ) 18. On Sunday, she arrives in ________ and shop there.A. BeijingB. ShanghaiC. Chengdu ( ) 19. On _________, she goes to Tian’anmen Square.A ．Monday B. Tuesday C. Thursday ( ) 20. On Thursday and Friday, she goes shopping with her ________.A. auntB. fatherC. uncle第五节．听两段较长对话，回答第21－25小题。
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段家集九年制学校2013---2014学年度第二学期七年级数学期中试题班级：姓名：学号：得分：
一、选择题：（每小题3分，共33分）
1、下列说法正确的是( )
A．0.25是0.5的一个平方根
B．72的平方根是7
C．正数有两个平方根，且这两个平方根之和等于0
D．负数有一个平方根
2、在平面直角坐标系中，下列哪个点在第四象限 ( )
A、（1，2）
B、（1，－2）
C、（－1，2）
D、（―1，―2）
3、下面四个图形中，∠1与∠2是邻补角的是（）
1
22
121
2
1 A B C D
4、下列说法正确的是（）
A、小于平角的角是直角
B、相等的角是对顶角
C、同位角相等
D、互为邻补角的两角和等于180°
5、已知△ABC中，∠A=20°，∠B=∠C，那么△ABC是( )
A、锐角三角形
B、直角三角形
C、钝角三角形
D、正三角形
6、下列方程中是二元一次方程的是（）
A、
9
=
xy
B、
19
2
3=
+y
x
C、
z
y
x=
-2
D、
y
x
x
y
=
+
2
7、中国2010年上海世博会吉祥物的名字叫“海宝”，意即“四海之宝”。
通过平移图中
的吉祥物“海宝”得到的图形是（）
（海宝） A B C D
8、如右图，AB∥CD，那么∠A+∠C+∠AEC＝（
A、360°
B、270°
C、200°
D、180°
9、从车站向东走400m，再向北走500m到小红家；从车站向北走500m，再向西走200m
到小强家，若以车站为原点，以正东、正北方向为正方向建立平面直角坐标系，则小红
家、小强家的坐标分别为（）
A、（400,500）；（500,200）
B、（400,500）；（200,500）
C、（400,500）；（-200,500）
D、（500,400）；（500，-200）
10. 若方程组
4314
(1)6
x y
kx k y
+=
⎧
⎨
+-=
⎩的解中x与y的值相等，则k为（）
Ａ．4 Ｂ．3 Ｃ．2 Ｄ．1
11. 已知方程组
53
54
x y
ax y
+=
⎧
⎨
+=
⎩和
25
51
x y
x by
-=
⎧
⎨
+=
⎩有相同的解，则a，b的值为（）
Ａ．
1
2
a
b
=
⎧
⎨
=
⎩Ｂ．
4
6
a
b
=-
⎧
⎨
=-
⎩Ｃ．
6
2
a
b
=-
⎧
⎨
=
⎩Ｄ．
14
2
a
b
=
⎧
⎨
=
⎩
二、填空题：（每空3分，共30分）
12、若5
21
3
3=
--
-n
m y
x是二元一次方程，则m=____________，n=____________。
13、方程4320
x y
+=的所有非负整数解为：。
2
1D
C
B
A
14、将点D （2，3）先向右平移6个单位，再向上平移3个单位，得到点D ’，则点D ’的坐标为 。
15、在△ABC 中，∠A=52°,∠B=102° ，则∠C=_______。
16、若
2(5212)3260
x y x y +-++-=，则24____x y +=．
17、如果⎩⎨
⎧-==13y x 是方程3x －ay ＝8的一个解，那么a ＝_________。
18．若8是m 的一个平方根，则m 的另一个平方根为_____。
19．如果点p （m +3，m 一2）在x 轴上，那么点P 的坐标为______________________。
20．一27的立方根与16的平方根之和是______________________。
三、解答题：（87分） 21、（1）化简
π
---+-32123（6分）
（2）已知0178=-+-y x 求y x +的算术平方根（6分）
22、按要求解下列方程组：（每小题8分，共16分）
（1）⎩⎨⎧+==+x y y x 53123 （用代入法解） （2）⎩
⎨⎧=+=27459
4-7y x y x （用加减法解）
23、甲、乙两人同解方程组()()5151422ax y x by +=⎧⎪⎨=-⎪⎩时，甲看错了方程()1中的a ，解得2
1x y =⎧⎨=⎩，乙
看错()2中的b ，解得54x y =⎧⎨=⎩试求2002
2006
10b a ⎛⎫+- ⎪⎝⎭的值．（12分)
24、（8分） 如图：已知BC 平分∠ACD ，且∠1=∠2，试证明：A B ∥CD
25、（7分）一条船顺流航行，每小时行20千米；逆流航行，每小时行16千米。
求船在静水中的速度与水流的速度。
26、（7分）我国古代数学著作《孙子算经》中有“鸡兔同笼”问题：“今有鸡兔同笼，
上有三十五头，下有九十四足，问鸡兔各几何？”
27、（7分）某中学七年级学生外出进行社会实践活动，如果每辆车坐45人，那么有15个学生没车坐；如果每辆车坐60人，那么可以空出一辆车。
问共有几辆车，几个学生？
28、（本题9分）已知方程组5354x y ax y +=⎧⎨+=⎩和25
51x y x by -=⎧⎨+=⎩有相同的解，则a ，b 的值为
29、已知方程组23352x y n
x y n +=⎧⎨
+=+⎩的解x 、y 的和为12，求n 的值．（9分）。