七年级上册期末复习卷5
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七年级英语上册测试题(五)一、单项选择(20分)( )1. Bananas(香蕉) are _______ or _________.A. yellow, redB. yellow, greenC. orange, blackD. green, white( )2. That’s Bob White. We can call him .A.Mr.BobB. WhiteC. Mr. WhiteD. Ms Bob( )3.—Mum, _______ is my friend, Jim. –Nice to meet you.A. thatB. thisC. heD. it( )4. ________ your keys, Jim. A. Here is B. That’s C. It is D. Here are( )5.---Your room looks very nice!. --- __________.A. Thank youB. Oh, noC. No, don’t say soD. You’re welcome( )6.—Mike, like eating ice cream —Yes, very much.A. does heB. is heC. can youD. do you ( )7. —___________ —B-A-S-E-B-A-L-L.A. What’s thatB. Is this you r baseballC. How do you spell baseballD. Can you spell it( )8. ________ your balls, Jim A. Where is B. That’s C. It is D. Where are( )9.--- Their _______ are in the bookcase.A. dictionaryB. dictionariesC. dictionarysD. watchs( )10 .Dave and I _______ good friends. A. is B. are C. am D. am not( )11. He’s Mary’s ________, her mother’s brother.A. friendB. fatherC. cousinD. uncle( ) 12.—Let’s play ping-pong. —No, it’s ________. I want to watch TV.A. InterestingB. relaxingC. boringD. exciting ()13.I am good at______pictures. I‘d like________an art teacher.A draw, to beB .draw ,beingC drawing ,to beD drawing ,being()13.There is_______desk in the room._____old book is on it.A a, AB a, AnC .An,aD an,A()14.——_______your father usually come home after work——At about 6:30.A How isB How doesC When doesD When is()15.My mother usually_______at 6:00a.m in the morning. A getsup B get up C get to D gets to()16.My parents_______to go out at night. A not want B not wants C doesn’t want D don’t want()17.—— ______do you play computer games ——Once a weekA HowB How oftenC How oldD How many()18.My brother likes ________basketball but he doesn’t like_____guitar.A playing,playing theB playing,play theC to play,playingD playing the,playing()19. ____he doesn’t have breakfast,_______he feels hungry.A Because,so B/,so C /,because D So,/()20.Mr Zhang teaches ________ Chinese. We like ______ classvery much.to school. The bus usually takes about 25 minutes. How long doesit 34 her to school Do you know 35 Minutes.( )26. A a B the C an D/( )27. A she B her C hers D him( )28. A and B but C so D for( )29. A on B in C for D from( )30. A at B on C in D of( )31. A lunch B breakfast C supper D dinner( )32. A goes B go C goes to D go to( )33. A First B Then C Last D Than( )34. A take B takes C taking D is taking( )35. A twenty-five B Ten C Thirty-five D Forty-five三、完形填空(10分)Jim comes from America. Now he studies in No.5 Middle School in Beijing every morning he 36 No. 21 bus to school .He has four classes in the morning and two in the 37 .He speaks English very well .He often helps his Chinese friendslearn 38 .He doesn’t like maths. He think it’sboring. 39 favorite subject is P.E.He thinks it’s40 . His P.E 41 is very strict with him. His last class every day 42 at 4:00. He can be in all kinds of activities in the 43 .Jim wants to know more about Chinese culture. From Monday to Wednesday he often does Chinese Kung Fu. On Thursday he often play chess for 44 hour. On Friday he takes part in the activities of 45 club. He likes playing gu zheng and Er hu .Every afternoon he gets home about six’o clock. How busy his day is!( )36.A takes B has C gets D have( )37. A noon B night C afternoon D evening( )38. A Chinese B English C Japanese D American( )39. A He B His C She D Her( )40. A boring B bad C funny D relaxing( )41. A friend B mother C teacher D brother( )42. A ends B begins C works D starts( )43. A night B evening C morning D afternoon( )44. A the B an C a D/( )45. A music B painting C chess D basketball四.阅读理解(20分)H ello I am Jeff Smith. I work in a big computer company. I am busy every day. I want to rent an old house with a beautiful garden. The house must be big and clean. And it’s quiet in the neighborhood .I hole there is a beautiful park nearby. So my parents can take a walk in the morning or after supper .Our family can have fun there on weekends,there must be a school near the house .and my daughter can go to school by herself .she likes playing computer games and wants a video arcade (电子游戏中心) near the house .my wife is busy with her work .She hopes there is a big supermarket in the neighborhood .she can buy some food and drinks easily. Do you have such a house to rentPlease call me at .( ) 1.There are_____people in Mr. Smith’s family.A.3B.4C.5D.6( )2.Jeff wants to rent _____. A. a garden B. a new house C. a park D. a house with a garden( )3.Why does Jeff hope these is a big park in the neighborhoodA. His parents can take a walk in the morning or after supper.B. His family can have fun there on weekends.C. A and B.D. His father can work there.( )4._____ likes playing computer games. A. Jeff’s wife B. Jeff’s daughter C. Jeff D. Je ff and Jeff’s wife( )5.This is a(n) ______ . A. ad.(广告) B. letter C. story D. gameM any children like to watch TV . It’s very interesting. The programs on TV tell us many things about the country and a lot of news about the world, Judy watches TV on Sundays. There is an English program getting to know America. It’s her favorite program.It tells about the life of America, such as buildings,traffic, food, houses, movie stars. Why does she love the program Because she likes English. She likes English best of all the subjects. When she is watching the program, she can remember every word she sees on TV. That helps a lot, because she learns many new words, English really interests her(令她感兴趣). She likes learning English. On weekdays,she doesn’t wa tch TV, but reads English story books every night before she goes to bed. She can learn a lot from the TV program and the story books.( )1. When does Judy often watch TV A. On Sundays. B. On weekdays. C. At nigh. D. On Saturdays.( )2.Getting to know America is a(an)______program. A.American B. English C. Japanese D. Chinese( )3.Why does she love the programA. She likes English.B. She can learn a lot from it.C. It helps her a lot.D. A, B and C.( )4. The program is about_____. A. English stories B. American food C. the life of America D. American people( )5. Which one is true A. Judy learns English at school and home. B. Judy watches her favorite TV program on Sunday.C. Judy reads English books every day.D. Judy likes English a little.五.首字母填空(15)1. Everyone in my class likes Jack because he is very f______.2. Tell me about your h______.- ---Well, I like reading very much.3. The party usually starts at 8 p.m,and f_____ at 11 p.m.4. Ben always r______ a bicycle to school .5. He is a good student, and he is never l______ for school.6、My sister ___________ (play) volleyball every day.7. Let’s ___________ (go) to school.8、I want ___________ (buy) a new jacket.9. Can your cousin___________ (sing) the English song.10.This is my dictionary. That’s ___________ (Bob).11.Some milk ___________ (be) in the box.12、Jack’s___________ (nine) birthday is on March 2nd.13、Helen __________ (do not ) her homework every day.14、Their parents like (strawberry) very much.15、74.To play soccer is ____________(困难的).六、按要求改写句子 (18分)1、I have a black pencil box.(变否定句) I _________________________ a black pencil box.2、My brother likes baseball.(改写为一般疑问句) __________ your brother ____________ baseball3、I like Chinese and English best(最). (改为同义句) X |My __________________________ are Chinese and English.4、Is that your notebook (改为复数句) __________________ your notebooks5. There are twelve months in a year.(提问划线部分) ______________ months are there in a year6. It is January the third today. (提问划线部分) ________ the ______ today7、The students have art on Thursday.(对划线部分提问) ______________________ the students have art8、 How much is this sweater (变同义句) __________ the__________ of this sweater9、 He wants to go to a movie on weekends. (变为一般疑问句)______he_______ to go to a movie on weekends_____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ __________________________________________________________________________________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ ____________________________________________________________。
统编版(2024新版)七年级上册语文期末基础复习测试卷1.根据拼音写出相应的汉字。
(3分)亲爱的同学们,一个学期的语文学习,是否让你发现了生活的可爱之处?你看,有情致丰富的万物,有真zhì热忱的人们,还有那份童趣盎然和哲思之美。
这一切,都让我们感受到了生命的滚tàng 和重量。
下面,让我们继续跟随文字的脚印,去发现生活的péng 勃,人间的温暖……万物有灵诗句作者与出处深情之月,托付对友人的深切关怀。
(1),随君直到夜郎西。
李白《闻王昌龄左迁龙标遥有此寄》不羁之山,寄托个性解放的少年意气。
河流大野犹嫌束,(2)。
谭嗣同《潼关》愁苦之雨,见证羁旅中的苦涩与无奈君问归期未有期,(3)。
李商隐《夜雨寄北》坚韧之菊,不负秋阳,竞相怒放。
(4),应傍战场开。
岑参《行军九日思长安故园》凌云之鹤,承载一腔豪情,直冲云霄。
(5),(6),刘禹锡《秋词(其一)》奔流之水,提醒时光流逝,且行且珍惜。
(7),(8),《〈论语〉十二章》【热身活动:“书”里有乾坤】(12分)1.以下是小组开展的有关“书”的研讨活动,请你一试身手,补充空白内容。
(12分)小语:最早出现在甲骨文中的“书”的字样是一只手抓住一个东西(刀或者笔)在器物上刻写,可见,“书”最早的意思是(1)。
后来,人们把写的东西装订成册,“书”就引申为成册的著作,如春秋战国时期儒家学派的经典著作(2)《》,它是记录孔子及其弟子言行的一部书。
书中“(3),(4)”一句,说的是几个人一起走路,其中必定有可以做我老师的人。
小文:“书”还有其他意思呢,如诸葛亮的《诫子书》,这个“书”的意思是(5)。
不仅如此,古代诗人还常常借“书”来寄托情思,如王湾在《次北固山下》中用“(6)?(7)”传递思乡之情;李商隐在给妻子的“书”(《夜雨寄北》)中,用“(8),(9)”把眼前的凄苦兑换成未来团聚的欢乐。
小嘉:在梳理“书”的相关义项时,我感受到了中华文化的博大精深,作为中华儿女的自豪感yóu rán ér sh ēng(10)。
部编版语文七年级上册期末复习专题专题五文学文化常识与综合性学习文学文化常识一、填空题。
1. 《春》是一篇 (填体裁),作者是朱自清,现代、、。
2. 《济南的冬天》选自《》,作者是老舍,著名作家,原名,字舍予,北京人,代表作有小说《》。
3. 泰戈尔,作家、诗人,曾获1913年诺贝尔文学奖。
4. 《秋天的怀念》的作者是。
5. 《世说新语》是南朝宋组织编写的一部小说集。
6. 孔子,名丘,字仲尼,家学派的创始人。
《》是记录孔子及其弟子言行的一部书。
7. 《诫子书》选自《》,作者是诸葛亮,时蜀汉政治家、军事家。
8. 《皇帝的新装》的作者是, (填国籍)著名童话作家。
9. 《从百草园到三味书屋》的作者是,原名,我国著名的、和革命家。
10. 《狼》的作者是,字留仙,世称,代文学家。
二、选择题。
11. 下列说法不正确的一项是( )A. 《咏雪》中“与儿女讲论文义”一句中的“儿女”指的是谢太傅的儿子和女儿。
B. 《天净沙·秋思》选自《全元散曲》。
作者是元代戏曲作家、散曲家马致远。
“天净沙”是曲牌名。
C. 《论语》与《大学》《中庸》《孟子》合称为“四书”。
D. 诗人泰戈尔的散文诗《金色花》从儿童的视角为读者展示了一位既有美丽清新的外表,又注重自己内在涵养的美好的母亲形象。
12. 下列表述不正确的一项是( )A. 《聊斋志异》是清代文学家蒲松龄创作的文言长篇小说集。
B. 《世说新语》是由南朝宋临川王刘义庆组织编写的一部志人小说集,主要记载汉末至东晋士大夫的言谈、逸事。
C. 《吕氏春秋》,又称为《吕览》,先秦杂家代表著作,战国末秦相吕不韦集合门客共同编写而成。
D. 《皇帝的新装》选自《安徒生童话和故事选》,作者是安徒生,其代表作有童话《卖火柴的小女孩》《海的女儿》等。
13. 下列对课文的理解不准确的是( )A. 法国作家让·乔诺的《植树的牧羊人》讲述了牧羊人用双手把荒漠变成绿洲的故事,告诉人们:只要满怀无私的大爱,具有不懈的毅力,就可以创造奇迹。
上海市建平中学西校2022-2023 学年七年级上学期期末复习卷学校:___________姓名:___________班级:___________考号:___________一、根据句意及音标填空二、单项选择11.They told us this story happened ________ a dark night.A.in B.at C.on D.of12.It’s very kind ________ you to help me get the ticket for F1.A.for B.of C.to D.with13.________ Ben ________ Lucy is free. You have to go there alone, I’m afraid.A.Either; or B.Both; and C.Not only; but also D.Neither; nor 14.We haven’t heard from them ________ last month.A.since B.by the end of C.for D.until 15.Look, the light in the office is on. Mr Black ________ working there.A.mustn’t be B.can’t be C.must be D.need to be 16.It ________ me only five minutes to get to school.A.takes B.costs C.spends D.pays17.________ is this box? Please weigh it for me.A.How much B.How many C.How weight D.How heavy18.The trip to Shanghai was really ________.A.excite B.excited C.exciting D.excitedly 19.—Shall we go for a picnic?—________.A.Thank you B.That’s all right C.Good idea D.Yes, you can 20.This afternoon Tom ate three ________.A.packet of crisp B.packets of crisp C.packets of crisps D.packet of crisps 21.Excuse me, can you tell me ________?A.how to do B.what to do C.how about do D.what about do 22.________ fun it is to have a spring outing!A.How B.What C.What a D.How a 23.She will be back ________ two days.A.after B.before C.in D.for24.The boy is crying loud because he finds no toys ________.A.to play B.to play with C.for playing D.playing 25.—Would you like some more?—_______ I'm full.A.Yes, please.B.I'd love to.C.No, I wouldn't.D.No, thanks. 26.Which of the following underlined parts is different in pronunciation from the others?27.I’m looking for ________ useful dictionary.A.a B.an C.the D./28.The plane landed ________ and all the passengers were ________.A.safe; safely B.safely; safely C.safely; safe D.safe; safe 29.Ben watched ________ TV programs last week, so he’s decided to watch ________ TV.A.too many; less B.too many; fewer C.too little; more D.little; too much 30.The soup tastes ________. Can I have ________ bowl?A.well; any B.good; other C.good; another D.well; any other 31.If it ________ tomorrow, you ________ watch DVDs at home.A.doesn’t rain; would like B.doesn’t rain; had better toC.is rain; should D.rains; had better32.The lady ________ a teacher, but now she is an actress.A.is used to be B.used to work for C.used to work as D.is used forworking as33.Nowadays Mary makes good ________ of time to do her homework at school. You know, she ________ stay up late doing exercises.A.use; used to B.uses; used to C.use; use to D.uses; use to 34.People in China are becoming ________ to animals than before.A.much more friendlier B.much friendlierC.much friendly D.more friendlier35.Bill Gates ________ in Harvard University last week. What he ________ encouraged and inspired many young students.A.spoke; said B.spoke; talked C.talked; spoke D.said; spoke三、短文选词填空III. Complete the following passage with the words or phrases in the box. Each can only beactivities. We made a survey about these activities that people like to do in spring. Here are the results.James: I’m 12. My favourite spring activity is swimming. I started to learn swimming when I was 7 years old. I always have a good time with my friends in the river. I 37 to go there.Sandy: In spring, I often visit my uncle and I like fishing with him. I also like boating and enjoy the beach. Last spring my uncle and I went boating. The dolphins came close to us. It was so 38 .Linda: I like gardening. I’m interested in working in the garden. I grow many flowers around my house every year. I like seeing butterflies 39 around them.Nancy: I love spring. 40 each of my family members. We are used to spending a whole day in the park. It is 41 to sit on the grass.四、用所给单词的正确形式填空五、改写句子六、划线部分提问七、同义句转化八、改写句子九、同义句转化十、改写句子十一、同义句转化十二、将所给单词连成句子61.not, football, street, police, told, the, the, the, in, children, to , play (连词成句).十三、阅读单选It was my first day of study in Australia. I stood in the school library and watched through the window. It was 12:45 pm. Kids were all enjoying the tasty food and fresh air. The same scene happened two hours ago. And during the period of time, I had eaten all of my food. What should I do now?No one could help me. I thought I should buy something to eat. One of my classmates, Coco came to me. She seemed to be a little shy. “I think I’ve made a mistake,” said Coco. “I had my lunch at recess. Now, I have nothing for lunch!” we made the same mistake.In Australia, a school day has three lesson blocks, broken up by two breaks: recess and lunch. Lunch break is from 12:45 pm to 1:30 pm. Before that, there’s a 30-minute break at about 10:45 am. It’s called “recess”, a period for you to eat snacks.Next time when you visit an Australian school, please remember: Keep your lunch until the real lunch period.62.I ________ when other kids were enjoying their tasty food at 12:45 pm.A.had a hamburger B.ate a cake from Coco C.had nothingD.wasn’t hungry63.The kids were enjoying their tasty food ________.A.in the canteen B.in each classroom C.in the open area D.in the hall 64.What does “recess” mean? It means ________.A.a short break for a rest B.a 10-minute break for sleepC.a 30-minute break for lunch D.a 30-minute break to eat snacks 65.Coco went up to me because ________.A.she wanted to share her snacks with me B.she was a little shyC.I asked her to come up to me D.they made the same mistake66.Kids in Australia can eat ________ a day at schoolA.once B.many times C.twice D.three times 67.The kids have lunch at ________.A.about 12:45 pm B.two hours before recess C.about 10:45 amD.after school十四、完形填空One of the most necessary things in the world is making friends. If you have a goodworld. You don’t have to be rich but you cannot have no friends. Sometimes your friend is the only one stands 70 you.How can we make friends 71 the correct way? First, you must know the person you want to make friends with. If you find he often 72 , or he doesn’t help others in trouble, you’d better not make friends with him. A good friend will be happy when you win. Also, he will be sad if you fail. If you have some questions about your studies, he will be quite willing to teach you 73 you understand. If you want to have this kind of friend, you must try your best to be like this. If you do that, I’m sure you will have many good friends.68.A.unlucky B.pleasant C.excited D.lucky 69.A.anything else B.else everything C.nothing another D.nothing else 70.A.out of B.opposite C.next to D.in the front of71.A.with B.in C.use D.by 72.A.works hard B.tidies his room up C.goes to the library D.tells lies 73.A.before B.when C.since D.until十五、短文首字母填空在短文的空格内填入适当的词,使其内容通顺。
专项复习(五) 古诗文默写一、直接型默写1.树木丛生,百草丰茂。
秋风萧瑟,洪波涌起。
2.日月之行,若出其中;星汉灿烂,若出其里。
3.潮平两岸阔,风正一帆悬。
海日生残夜,江春入旧年。
4.枯藤老树昏鸦,小桥流水人家,古道西风瘦马。
5.河流大野犹嫌束,山入潼关不解平。
6.杨花落尽子规啼,闻道龙标过五溪。
我寄愁心与明月,随君直到夜郎西。
7.峨眉山月半轮秋,影入平羌江水流。
夜发清溪向三峡,思君不见下渝州。
8.岐王宅里寻常见,崔九堂前几度闻。
正是江南好风景,落花时节又逢君。
9.遥怜故园菊,应傍战场开。
10.回乐烽前沙似雪,受降城外月如霜。
不知何处吹芦管,一夜征人尽望乡。
11.自古逢秋悲寂寥,我言秋日胜春朝。
晴空一鹤排云上,便引诗情到碧霄。
12.君问归期未有期,巴山夜雨涨秋池。
何当共剪西窗烛,却话巴山夜雨时。
13.僵卧孤村不自哀,尚思为国戍轮台。
夜阑卧听风吹雨,铁马冰河入梦来。
二、理解型默写1.《〈论语〉十二章》中阐述学习与思考关系的句子是:学而不思则罔,思而不学则殆;表示在生活中,我们要向有长处的人学习的句子是:三人行,必有我师焉。
2.曹操的《观沧海》一诗中最能反映作者博大襟怀的诗句是:日月之行,若出其中,星汉灿烂,若出其里。
3.王湾的《次北固山下》蕴含新事物孕育于旧事物解体之时的哲理的诗句是:海日生残夜,江春入旧年。
4.李商隐的《夜雨寄北》中写诗人超越时空,想象日后重逢时的情景的诗句是:何当共剪西窗烛,却话巴山夜雨时。
5.《潼关》中谭嗣同以大气浩然之笔抒发冲决一切人生羁绊的豪迈情怀的诗句是:河流大野犹嫌束,山入潼关不解平。
6. 李白在《闻王昌龄左迁龙标遥有此寄》中把对友人的怀念之情托付给明月,见于诗句:我寄愁心与明月,随君直到夜郎西。
7.马致远的《天净沙·秋思》中表明游子漂泊在外的思乡心情(点明主旨、直接道出天涯游子之悲)的句子是:夕阳西下,断肠人在天涯。
8.李商隐的《夜雨寄北》中暗示诗人仕途失意,羁旅他乡思归不得的抑郁愁苦之情的诗句是:君问归期未有期,巴山夜雨涨秋池。
七年级英语上册期末复习试卷I.词汇:(20分)(A) 根据要求写单词。
(10分)1.photo(复数)2.here( 反义词)3.one( 序数词)4.fifth (基数词)5.these (单数)6.have (单三)7. 多大岁数(翻译)8.Have a good time (翻译)9.let us (缩写词)10.boy(复数)(B)用所给词的适当形式填空:(5分)1. Li Lei ________ (be) at school.2. There _________ (be) some books on the desk.3. Let's _________ (look) at the map on the wall.4. Miss Gao is ___________ (I) teacher.5. Where are your _____________ (box)?(C)用所给的疑问词(组)填空( 5分)what color, how, how old, where, who,1.---__________ are you?---I'm 13.2.---__________ is the boy?---He's my brother.3.---__________ is Tom? ---He's at home.4.---_____________are you? ---I'm fine.5. ---__________ is it? ---It's red.II.单项填空(共15小题,计15分)()1、This is a picture of family.A.JimB. Jim’sC. Jims()2、Her birthday is February.A.inB. onC. at()3What color your shoes?----- Blue.A.is, It’sB. is, IsC. are, They’re() 4 ---Let’s soccer ball with the boys.---- That sounds great.A.to playingB. and playingC. and play D, play()5、We need a lot of every day.A. vegetablesB. meatsC. broccolis()6、 are the pants?----They’re 50 dollars.A.HowB. How muchC. Where()7、He likes but he doesn’t like.A. ice creams, banana B. bananas, apple C.. bananas, apples()8、The baby is only ten.A.month oldB. months years oldC. months old()9、 Look! Some broccoli in the box. Some apples in the bag.A.are, areB. is, isC.. is, are()10、“f” and“u” are in the word “fun”. A. An, a B. An, an C. A, a D,the ()11.—When is Tom’s birthday?— ___________birthday is May 6th.A. MyB. YourC. HisD. Her()12.— When do you have P.E. ?—We have it___________ Monday and Friday.A. inB. onC. atD. for()13.— I like that red T-shirt. ___________ is it?—It’s fifteen dollars.A. How oldB. How manyC. How muchD. How long()14.— Where are the socks?— ___________A. They’re on the bedB. They’re $ 5.C. I’ll take them.D. I can’t find them.()15. Her birthday is February3rd. A. in B. on C. at D. for III.完形填空(10小题,共10分)This is __1__ bedroom. It’s a nice room. We can see a bed, two __2__, achair and a cat on the floor. What __3__ see on the wall? We can see some __4__ and a kite on it. We can also(还)see two windows __5__wall. Where’s __6__ computer? It’s on __7__ table.Some flowers are on this table, __8__. Where __9__ her penil-box and books?They are on the other(另一个)table. We can see a clock __10__ it. Under the chair is her cat. It’s a very nice bedroom.() 1. A. Kate B. of Kate C. Kate’s D. of Kate’s()2. A. tables B. table C. tables’ D. table’s() 3. A. we can B. can we C. can D. we() 4. A. in picture B. picture C. pictures D. of picture() 5. A. in the B. in C. on the D. on()6. A. a B. the C. some D. an()7. A. the one B. an one C. one D. a n() 8. A. yes B. two C. too D. no() 9. A. is B. are C. be D. is the()10. A. in B. under C. on D. ofI V.阅读 (共15小题,计30分)( A)根据短文内容,回答问题。
初中七年级生物(上册)期末复习题及答案考试说明:本试卷五个大题,满分100分,时间90分钟。
一、选择题(共25个小题,每题2分,共50分)1、赤潮会严重危害渔业生物和海洋生态,主要原因是某些单细胞生物()A.净化了海水中所有的生物 B.分解了海水中鱼的尸体C.在海水中大量繁殖 D.全部死亡2、我国倡导无偿献血。
献血时一般从献血者肘窝处的静脉采血,而非动脉采血,下列解释错误的是()A.静脉在皮下的分布大多较浅B.静脉管径较大、管壁薄C.静脉内血流速度较快D.静脉采血后容易止血3、下列各项物质中,既是光合作用的原料,又是呼吸作用的产物是:()A.二氧化碳和水B.有机物和氧气C.氧气和二氧化碳D.有机物和水4、某同学上肢的伤口感染,医生在其臀部注射药物治疗。
药物到达伤口经历的血液循环路线是()A.先体循环,接着肺循环,后体循环 B.只有肺循环C.先肺循环,接着体循环,后肺循环 D.只有体循环5、某人喝醉了酒,走路摇晃,站立不稳,说明酒精麻痹了脑的哪一个部位()A.大脑B.小脑C.脑干D.脑神经6、油桃是大家熟悉的水果。
油桃的可食用部分和种子分别由油桃花的哪一部分发育而来A.子房和胚珠B.胚珠和子房C.胚珠和子房壁D.子房壁和胚珠7、在制作人的口腔上皮细胞、洋葱鳞片叶表皮细胞临时装片时,在载玻片上分别滴加的液体和它们染色共用的液体依次是()A.碘液、清水、清水B.生理盐水、清水、碘液C.清水、生理盐水、碘液D.碘液、生理盐水、碘液8、夜晚卧室里不易摆放过多盆栽植物,合理的解释是植物与人一样不停地进行()A.呼吸B.生长C.繁殖D.应激性9、有“海中之花”之称的海葵,属于下列哪类动物()A.腔肠动物B.扁形动物C.线形动物D.环节动物10、肺是人体呼吸系统的主要器官。
下列叙述错误的是()A.外界气体经过呼吸道进入肺B.肺泡数量多,气体交换面积大C.肺泡与毛细血管气体交换后肺泡内氧气含量增加D.胸廓容积变小时,肺收缩,气体从肺内排出11、“野火烧不尽,春风吹又生”体现了生物的哪种特征()A.生物的生活需要营养B.能对外界刺激作出反应C.能生长和繁殖D.能进行呼吸12、血红蛋白的特性决定了红细胞的主要功能是()A.运输氧气 B.运输二氧化碳 C.运输养料 D.运输废物13、法布尔在《昆虫记》中栩栩如生地记录了昆虫的本能及习性,他研究昆虫的方法主要是()A.观察法B.实验法C.调查法D.模拟法14、下列各项中,属于特异性免疫的是()A.皮肤的屏障保护作用B.患过麻疹的人不再患麻疹C.唾液中溶菌酶的杀菌作用D.呼吸道黏膜上纤毛的清扫作用15、地球是所有生物赖以生存的唯一家园,关注生物的栖息地、关注生物圈就是关注人类自已的生存。
2020-2021学年七年级数学上册期末综合复习专题提优训练(人教版)期末检测卷05一、选择题(本题共计6小题,每题3分,共计18分)1.(2020·安徽淮南市·七年级期中)李白出生于公元701年,我们记作701+,那么秦始皇出生于公元前256年,可记作( ) A .256- B .256 C .957- D .445【答案】A2.(2020·徐州树德中学七年级月考)下列运算中,结果正确的是( )A .224347a a a +=B .222426m n mn m n +=C .13222x x x -= D .2222a a -= 【答案】C3.(2020·安徽淮南市·七年级期中)下列说法正确的是( )A .22πx 的次数是3B .32xy 的系数是3C .x 的系数是0D .1是单项式【答案】D4.(2020·重庆沙坪坝区·七年级期末)按如图所示的运算程序,若输入m 的值是2,则输出的结果是( )A .﹣1B .1C .2D .3【答案】D5.(2020·平顶山市第五十五中学七年级月考)已知关于x 的一元一次方程()320a x x a --+-=的解是13的倒数,则a的值为( )A .-2B .-1C .1D .2【答案】D6.(2020·重庆沙坪坝区·七年级期末)如图,点O 在直线AB 上,OD 平分∠AOC ,OE ⊥OC .若∠BOC :∠COD =4:3,则∠DOE 度数是( )A .30°B .36°C .40°D .54°【答案】B二、填空题(本题共计6小题,每题3分,共计18分)7.(2020·上海松江区·七年级期末)设某数为x ,用含x 的代数式表示“比某数的2倍多3的数”:______.【答案】23x +8.(2020·安徽淮南市·七年级期中)2020年国庆、中秋恰逢同一天,据文化和旅游部数据中心统计,国庆中秋8天长假期间,全国共接待国内游客6.37亿人次.其中6.37亿用科学记数法表示为______.【答案】86.3710⨯9.(2020·安徽淮南市·七年级期中)若23234x a b -与32y ab --的和为单项式,则x y +=______. 【答案】310.(2021·全国七年级)如图是一个正方体的表面沿着某些棱剪开后展成的一个平面图形,若这个正方体的每两个相对面上的数字的和都是8,则x +y ﹣z =_____.【答案】-211.(2021·辽宁抚顺市·七年级期末)将一根长为12cm 的铁丝围成一个长与宽之比为2:1的长方形,则此长方形的面积为___________2cm .【答案】812.(2020·宜春市第八中学七年级月考)己知线段AB 长为6,点C 为射线AB 上一点,若线段AB 与BC 其中一条线段是另外一条线段长的2倍,则AC =____________.【答案】3或9或18三、(本题共计5小题,每小题6分,共计30分)13.(2021·辽宁抚顺市·七年级期末)解方程(1)()532x x =+; (2)42123x x ++-=. 【答案】(1)解:去括号得:563x x =+,移项合并得:26x =,解得:3x =;(2)解:去分母得:3(4)2(2)6x x +-+=去括号得:312246x x +--=,移项合并得:2x =-.【点睛】本题考查解一元一次方程,涉及去分母、去括号、移项、合并同类项、化系数为1等步骤,是基础考点,难度较易,掌握相关知识是解题关键.14.(2021·沈阳市第一三四中学七年级期末)先化简再求值:()()22231x y xy x y xy +---,其中2x =-,1y =. 【答案】解:原式2222233353x y xy x y xy x y xy =+-++=-++当2x =-,1y =时,原式()()221521311=--⨯+⨯-⨯+=-.【点睛】本题考查的是整式的加减,化简求值,掌握以上知识是解题的关键.15.(2021·二连浩特市第二中学七年级期末)计算:(1)2314(3)13()42⨯--+---; (2)21293()12323-÷+-⨯+. 【答案】解:(1)原式=14913()642⨯-+-- =13613()642-+-- =136(13)()(64)2+-+-+- =136(77)2+-=1412-; (2)原式=123(1212)923-+⨯-⨯+ =3(68)9-+-+=3(2)9-+-+=4.【点睛】本题考查有理数的混合运算.熟记有理数的混合运算的运算顺序和每一步的运算法则是解题关键.注意运算律的应用. 16.(2021·辽宁大连市·七年级期末)有10袋小麦,每袋以90kg 为标准,超过的千克数记作正数,不足的千克数记作负数,称后的记录如下表:(1)请通过计算说明这10袋小麦总计超过多少kg 或不足多少kg ?(2)若每千克小麦2.5元,求10袋小麦一共可以卖多少元?【答案】解:(1)()()()()()11 1.51 1.2++++++-++()()()()()1.3 1.3 1.2 1.8 1.1+++-+-++++5.4=答:这10袋小麦总计超过5.4kg .(2)9010 5.4 2.5()⨯+⨯2263.5=答:10袋小麦一共可以卖2263.5元.【点睛】本题考查了正数与负数,有理数的运算在实际中的应用.理解题意,正确列出算式是解决问题的关键.17.(2020·浙江衢州市·七年级期中)阅读下面解题过程:计算: ()13153632⎛⎫-÷--⨯ ⎪⎝⎭解:原式=25(15)()66-÷-⨯(第①步) = ()251566⎛⎫-÷-⨯ ⎪⎝⎭(第②步) =(-15)÷(-25)(第③步)= 35(第④步) (1)上面解题过程中有错误的步骤是________.(填序号)(2)请写出正确的解题过程.【答案】解:(1)②乘法和除法的混合运算,要依次计算,计算步骤不能颠倒,④负数和负数相除结果为正数,因此②④错误, 故填:②④;(2)原式 =()251566⎛⎫-÷-⨯ ⎪⎝⎭= ()615625⎛⎫-⨯-⨯ ⎪⎝⎭=186 5⨯=108 5.【点睛】本题考查有理数的乘除法混合运算,熟练掌握运算法则是关键.四、(本题共计3小题,每小题8分,共计24分)18.(2021·辽宁锦州市·七年级期末)如图,已知四点A,B,C,D,请用直尺按要求完成作图.(1)作射线AD;(2)作直线BC;(3)连接BD,请在BD上确定点P,使AP CP+的值最小,并说明理由.【答案】解:(1)如图所示:射线AD为所求;(2)如图所示:直线BC为所求;(3)如图所示:连接AC 、BD 相交于点P ,点P 为所求.理由:∵两点之间,线段最短,且点P 在AC 上,∴点P 使AP +CP 的值最小.【点睛】本题考查了直线、射线与线段的作图,掌握两点之间,线段最短是解题的关键.19.(2019·陕西咸阳市·七年级期末)火车站和飞机场都为旅客提供“打包”服务,如果长、宽、高分别为a 、b 、c 米的箱子按如图所示的方式“打包”,(其中黑色粗线为“打包”带)(1)至少需要多少米的“打包”带?(用含a 、b 、c 的代数式表示)(2)若按照这样的“打包”方法,要给一个里面装满书的箱子“打包”,箱子的长为60厘米,宽为40厘米,高为35厘米,则需要多少米的“打包”带?【答案】(1)根据题意,结合图形可知,箱子上下底面的绳长为:24b c +;箱子左右面的绳长为:2a ;箱子前后面的绳长为:4a,24+24624b c a a a b c ++=++,∴打包带的长至少为624a b c ++米(2)将b =60、c =40、a =35代入上式,得:635260440490 4.9cm m ⨯+⨯+⨯==∴需要4.9米的“打包”带.【点睛】此题是关于合并同类项在实际生活中的应用,在解答此类问题时,只需用所给未知数表示出打包带的长即可;本题中直接求打包带的长度比较困难,所以要把箱子分成6个面,分别求出箱子各个面上绳子的长度,然后再求和就可以了;需要注意的是要不重不漏,合并同类时要彻底.20.(2021·日照市东港区南湖镇中心初级中学七年级期末)已知关于a 的方程2(a -2)=a +4的解也是关于x 的方程2(x ﹣3)﹣b =7的解.(1)求a 、b 的值;(2)若线段AB =a ,在直线AB 上取一点P ,恰好使AP PB =b ,点Q 为PB 的中点,请画出图形并求出线段AQ 的长.(注:AP PB=b 是指AP 的长与PB 的长的比值为b ) 【答案】解:(1)()224a a -=+244a a -=+8a =,∵两个方程的解相同,∴把8x =代入()237x b --=,得()2837b ⨯--=107b -=3b =,(2)根据(1)8AB =,3AP PB =,即3AP PB ,①如图所示:364AP AB ==,124PB AB ==, ∵Q 是BP 中点, ∴112PQ PB ==, ∴617AQ AP PQ =+=+=;②如图所示:142BP AB ==, ∵Q 是BP 中点, ∴122BQ BP ==, ∴8210AQ AB BQ =+=+=;综上:AQ 的长为7或10.【点睛】本题考查解一元一次方程和与线段有关的计算,解题的关键是掌握一元一次方程的解法和线段和差问题的计算方法,第二问需要注意分类讨论.五、(本题共计2小题,每小题9分,共计18分)21.(2021·沈阳市第一三四中学七年级期末)列一元一次方程解决下面的问题新隆嘉水果店第一次用800元从水果批发市场购进甲、乙两种不同品种的苹果,其中甲种苹果的重量比乙种苹果重量的2倍多20千克,甲、乙两种苹果的进价和售价如下表:(1)惠民水果店第一次购进的甲、乙两种苹果各多少千克?(2)惠民水果店第二次以第一次的进价又购进甲、乙两种苹果,其中甲种苹果的重量不变,乙种苹果的重量是第一次的3倍;甲种苹果按原价销售,乙种苹果打折销售.第二次甲、乙两种苹果都售完后获得的总利润为820元,求第二次乙种苹果按原价打几折销售?【答案】(1)解:设第一次购进乙种苹果x 千克,则购进甲种苹果(220x +)千克.根据题意,得()104220800x x ++=,解得:40x =,24020100⨯+=;答:第一次购进甲种苹果100千克,购进乙种苹果40千克.(2)解:第二次购进乙苹果403120⨯=千克,总进价=4100101201600⨯+⨯=元,设第二次乙种苹果按原价y 折销售,根据题意,得810015120160082010y ⨯+⨯⨯-=,解得9y =; 答:第二次乙种苹果按原价9折出售.【点睛】本题考查了一元一次方程的应用,正确理解题意、找准相等关系是解题的关键.22.(2021·辽宁大连市·七年级期末)已知,70AOB ∠=︒,OC 是AOB ∠内部的一条射线.(1)如图1,当OC 是AOB ∠的角平分线,求AOC ∠的度数;(2)如图2,当30BOC∠=︒时,AOD ∠是AOB ∠的余角,OE 是COD ∠的角平分线,请补全图形,并求AOE∠的度数; (3)若把“70AOB ∠=︒,30BOC ∠=︒”改为“AOB ∠是锐角,且AOB n ∠=︒,25BOC n ∠=︒”,(2)中的其余条件不变,请直接写出AOE ∠的度数_____________________.(用含n 的式子表示)【答案】解:(1)当70AOB ∠=︒时,OC 是AOB ∠的角平分线,11703522AOC AOB ∴∠=∠=⨯︒=︒. (2)70AOB ∠=︒,30BOC ∠=︒,∴∠AOC =∠AOB -∠BOC =40°.70AOB ∠=︒,AOD ∠是AOB ∠的余角,9020AOD AOB ∴∠=︒-∠=︒.如图,当AOD ∠在AOB ∠内部时,20COD AOC AOD ∠=∠-∠=︒,OE 是COD ∠的角平分线,11201022COE COD ∴∠=∠=⨯︒=︒. 30AOE AOC COE ∴∠=∠-∠=︒.如图,当AOD ∠在AOB ∠外部时,60COD AOC AOD ∠=∠+∠=︒,OE 是COD ∠的角平分线,11603022COE COD ∴∠=∠=⨯︒=︒. 10AOE AOC COE ∴∠=∠-∠=︒.综上,∠AOE 的度数为10°或30°(3)AOB n ∠=︒,25BOC n ∠=︒,∴∠AOC =∠AOB -∠BOC =35n ︒. AOB n ∠=︒,AOD ∠是AOB ∠的余角,(90)AOD n ∴∠=-︒.如图,当AOD ∠在AOB ∠内部时,38909055COD AOC AOD n n n ⎛⎫∠=∠-∠=-+=- ⎪⎝⎭,OE 是COD ∠的角平分线,118490452255COE COD n n ⎛⎫⎛⎫∴∠=∠=⨯-︒=-︒ ⎪ ⎪⎝⎭⎝⎭. 3414545555AOE AOC COE n n n ⎛⎫⎛⎫∴∠=∠-∠=--=-︒ ⎪ ⎪⎝⎭⎝⎭ 如图,当AOD ∠在AOB ∠外部时,()32909055COD AOC AOD n n n ⎛⎫∠=∠+∠=+-=-︒ ⎪⎝⎭, ∵OE 是COD ∠的角平分线,112190452255COE COD n n ⎛⎫⎛⎫∴∠=∠=⨯-︒=-︒ ⎪ ⎪⎝⎭⎝⎭. 3144545555AOE AOC COE n n n ⎛⎫⎛⎫∴∠=∠-∠=--=-︒ ⎪ ⎪⎝⎭⎝⎭. 或13445(45)555AOE COE AOC n n n ∴∠=∠-∠=--=-︒ 综上,∠AOE 的度数为1(45)5n -︒或4(45)5n -︒或4(45)5n -︒. 【点睛】本题考查角平分线的定义,余角的概念及角度的数量关系计算,结合图形进行分类讨论解题是关键.六、(本题共计1小题,每小题12分,共计12分)23.(2021·沈阳市第一三四中学七年级期末)如图,在数轴上点A 为表示的有理数为-8,点B 表示的有理数为12,点P 从点A 出发分别以每秒4个单位长度的速度在数轴上沿由A 到B 方向运动,当点P 到达点B 后立即返回,仍然以每秒4个单位长度的速度运动至点A 停止运动.设运动时间为t (单位:秒).(1)当1t =时,点P 表示的有理数是______;(2)当点P 与点B 重合时,t=______; (3)①在点P 由点A 到点B 的运动过程中,点P 与点A 的距离是______,点P 表示的有理数是______(用含t 的代数式表示);②在点P 由点B 到点A 的运动过程中,点P 与点A 的距离是______(用含代数式表示); (4)当t =______时,12AP =.【答案】解:(1)当1t =时,点P 移动的距离是4×1=4个单位长度,点P 表示的有理数是﹣8+4=﹣4;故答案为:﹣4;(2)当点P 与点B 重合时,点P 移动的距离是12-(﹣8)=20,20÷4=5秒,故答案为:5;(3)①在点P 由点A 到点B 的运动过程中,点P 与点A 的距离是4t ,点P 表示的有理数是84t -+;故答案为:4t ;84t -+;②由2AB 的长减去点P 移动的距离即为点P 与点A 的距离,AB =12-(﹣8)=20,在点P 由点B 到点A 的运动过程中,点P 与点A 的距离是()4045t t ->;故答案为:()4045t t ->;(4)当点P 由点A 到点B 运动时,4t =12,解得t =3;当点P 由点B 到点A 运动时,40-4t =12,解得t =7; 综上,当t =3或7时,AP =12.【点睛】本题以数轴为载体,主要考查了数轴上两点间的距离和一元一次方程的应用,属于常考题型,正确理解题意、灵活应用数形结合思想是解题的关键.。
2022-2023学年七年级语文上册期末复习模拟卷及答案班级: 姓名: 学号:说明:本卷共五大题,23 小题,全卷满分120 分。
一、语言文字运用(10分)1.下列句子中,没有错别字且加点字注音全都正确的一项是( )(2分)A.生活中总有一些人喜欢用骇(hài)人听闻的传言来炫(xiàn)耀自己“消息灵通”,甚至发展到自编摇言的不可救药的地步。
B.道旁的槐树上层层叠叠地开满了淡雅的花,花团锦簇(cù):开着的,正把花囊撑着,从远处就能嗅到香甜的味道;没开的,也沐浴着阳光,努力地酝酿(niàng)着。
C.白日的喧(xuān)嚣早已退去,临窗的长排书桌却几乎满坐,在这静谧(bì)的空间里,人们认真地读着各自的书。
D.乡村的孩童对草垛(duǒ)有着温馨美好的记忆,因为草垛场是他们对垒(lěi)的战场、捉迷藏的藏身地。
2.在下面一段文字横线上依次填人词语,全部恰当的一项是( )(2分)阅读与不阅读,能区别出两种的生活方式或人生方式。
这中间是一道、一道鸿沟,两边是完全不一样的气象。
一边,繁花似锦,一边必定是一望无际的、令人窒息的荒凉和。
A.大相径庭篱笆花枝招展寂寥B.大相径庭屏障草长莺飞喧嚣C.截然不同屏障草长莺飞寂寥D.截然不同篱笆花枝招展喧嚣3.下列句子没有语病的一项是( )(2 分)A.阅读各国的文学作品,一个很重要的意义,就是去了解不同的文化,进而理解文化背后的人。
B.欣欣同学到现在还没有来,大家断定她大概是生病了。
C.家长要让孩子接受“吃苦教育”,以提高孩子自食其力的能力和独立自主的精神。
D.一堂堂看似普通的体育课,不仅影响青少年的体育价值观,更直接关系到他们的身体健康。
4.下列填人语段横线上的语句,衔接最恰当的一项是( )(2 分)篆刻艺术对我国文人绘画的发展起到了举足轻重的推动作用,诗、书、画、印的结合成为中国画的重要特点。
,展现了中国传统文化的精致与高雅,其不只是篆刻技法的具象表现,更是文人主体思想意趣的抒发与吐露,是文人个性、内心情感的外化。
广州市70中学期末复习卷5
班级: 姓名: 学号:
一、填空题:(每小题3分,共30分)
1、|-2010|的相反数是 。
2、比较
的大小(用“>”、“=”、“<”连接起来)。
3、单项式
的系数是 ,次数是 。
4、已知
与和仍是单项式,则 . 5、若是一元一次方程,则n = 。
6、近似数-3.90精确到 位,有 个有效数字。
7、若a 、b 互为相反数,c 、d 互为倒数,m 的绝对值是最小的正整数,则 8、如图,从张村到李村有四条路, 选择第 条路最近,用数学知识,
解释为 。
9、 请你写出一个一元一次方程,使它的解是,且未知数的系数是2, 。
10、如图所示:用火柴棍拼成由三角形组成的图形,如果图形
②
④ ③ ①
张李村
中含有n个三角形,共需要根火柴棍。
二、选择题(每小题3分,共26分)
11、中国的国土面积约为9600000平方千米,用科学记数法表示为()
A、96×105
B、0.96×10
C、9.6×106D9.6×107
12、关于x的方程的解为,则a的值为()
A、5
B、-1
C、-5
D、
13、下面这个几何体的展开图形是()
n=1n=2
n
n=4
n=3
14、下列叙述正确的是()
A、单项式的系数是
B、的次数是4
C、是二次三项式
D、去括号
15、若是一元一次方程,则m的值为()
A、1
B、-1
C、
D、不能确定
16、若单项式与是同类项,则n的值是()
A、-1
B、0
C、7
D、2
17、已知a、b在数轴上的位置如图所示,则下列结论中正确
的是()
A、B、C、D、
18、一桶水连桶共重a千克,桶重2千克,将水分成3 等份,那么每份水重()千克
A、B、C、D、
19、下列计算正确的是()
A、-(-2)2=4
B、(-3)3×(-)=6
C、-24=16
D、(-0.1)2=0.12
20、若(x-2)2+|3y-1|=0,则的值是()
A、9
B、6
C、
D、
25、如图,∠是直角,∠也是直角,
若∠=,则∠等于()
A、90°+
B、90°-
C、180°+
D、180°-
三、先化简,再求值(6分)
26、4m3-(3m2+5m-2)+2(3m+m2-2m3)-1,其中m=2009.
四、解方程(6分)
29、x+=1-
五、解答题(每小题5分,共10分)
30、有一列单项式:-a,2a2,-3a3,4a4,……-19a19,20a20……
⑴系数按排列的指数按排列.
⑵根据上述规律,第100个单项式为
⑶第n个单项式为
31、阅读以下例题,解方程|2x|=1
解:①当2x≥0时,原方程可化为2x=1,它的解是x=
②当2x<0时,原方程可化为-2x=1,它的解是x=-
所以原方程的解是x=或x=-
请你模仿上面的例题的解法,解方程|2x-1|=1
七、应用题(32、33小题各7分,34小题8分,共22分)
32、甲组有31人,乙组有20人,现又调来18人,要使甲组
人数是乙组人数的2倍,则应往甲乙两组各分配多少人?
33、下图是甲商场电脑产品进货单,其中进价一栏被墨水污染,请你仔细阅读进货单,并根据它提供的信息,求出这台电脑的进价。
甲商场商品进货单
供货单位乙单位
品名与规格P4200
商品代码-63D7
商品归属电脑专柜
进价(商品的进货价
元
格)
标价(商品的预售价
6000元
格)
折扣8折
利润(实际的销售后利
250元
润)
售后服务保修终生,三年内免费,三年后收取材
料费,五日快修,周围机备用,免费投
诉、回访。
34、“五一”期间,某校由4位教师和若干学生组成的旅游团到某地旅游,甲旅行社的收费标准是:如果买4张全票,则其余人按七折优惠;乙旅行社的收费标准是:5人以上(含5人)可购团体票,旅游团体票按原价的八折优惠。
这两家旅行社的全票价均为每人300元。
⑴若有10位学生参加该旅游团,问选择哪家旅行社更省钱?
⑵参加旅游团的学生人数是多少时,两家旅行社收费一样?
参考答案
一、1、6;2、-2010;3、>;4、-,6;5、1;6、3;
7、3;8、百分位,3;9、2008;10、③,两点之间线段最短;
11、答案不唯一,只要写一个符合题意的方程坎可,如:2x=-4;12、2n+1
二、13-18:C C D A C B 19-25:B B C D
C A D
三、26、原式=-20+4+17=1
27、原式=(-+)×12+4-(-27)=6-8+9-4+27=30
四、28、原式=4m3-3m2-5m+2+6m+3m2-4m3-1=m+1
当m=2009时,原式=2009+1=2010
五、29、解:却分母得15x+5(x+2)=15-3(x-6)
去括号得15x+5x+10=15-3x+18
移项得15x+5x+3x=15+18-10
合并得23x=23 系数化为1得x=1
30、⑴-1, 2,-3, 4,-5……1, 2,3, 4,5
⑵100a100
⑶当n为奇数时,为-,当n为偶数时为
31、解:当2x-1≥0时,原方程可化为2x-1=1
它的解是x=1
当2x-1<0时,原方程可化为-(2x-1)=1
它的解是x=0
所以原方程的解是x=1或x=0
七、32、解:设应调往甲组x人,乙组(18-x)人
根据题意,得方程:31+x=2[20+(18-x)]
解方程得x=15 18-x=3
答:应调往甲组15人,乙组3人
33、设进价为x元
根据题意,得6000×0.8-x=250
解方程得x=4550
答:这台电脑的进价是4550元
七年级上册期末复习卷5
34、⑴住甲旅行社付款4×300+10×0.7×300=3300(元)
住乙旅行社付款14×0.8×300=3360(元)
从上可知应选择甲旅行社更省钱。
⑵设参加旅游团的学生有x人时,两家旅行社收费一样
由题意,得方程4×300+0.7x×300=0.8(x+4)×300
解方程得x=8
答:当参加旅游团的学生有8人时,两家旅行社收费一样。
11 / 11。