九年级练习一
初中英语九年级全册-第一单元练习题
第1页 共3页优质资料---欢迎下载九年级英语单元练习（一）一、单项选择1. —What did your father say? —He asked us__________.A. how to fix up the bicyclesB. why we fix up the bicyclesC. that we fixed up the bicyclesD. where did we fix up the bicycles 2. I’m __________in the__________ story.A. interested; interestedB. interesting; interestingC. interesting; interestedD. interested; interesting 3. —__________ do you have a sports meeting? —Twice a year.A. How soonB. How oftenC. How longD. How far 4. —What do you think of Mr. Green?—I find_________ difficult to work with him.A. thisB. themC. itD. that 5. If you practice_________ more often, you will do better.A. swimmingB. to swimC. swimD. swimming 6. —Shall we go for a picnic tomorrow? —Well, it all_______the weather.A. belongs toB. happens toC. depends onD. concentrates on 7. Please remember______ your note book here tomorrow.A. bringsB. broughtC. bringingD. to bring 8. —Peter has changed a lot,hasn’t he?—Yes ,He used to________the guitar, but now he is more_______in playing soccer. A. plays;interested B. play;interested C. play;interesting D. playing;interest 9. _______ good suggestion ! I haven’t heard of _______ wonderful advice for a long time.A. What a; such aB. How; suchC. What a; suchD. How; such a 10. —________do you learn English ？ —By________vocabulary lists.A. How ；makeB. What ；makesC. How ；makingD. What ；making11. Linda’s father hates waiting in long lines.I think he’s just not very________.A. patientB. talentedC. popularD. powerful 12. —Susan ，what are the advantages of MP5 players ？—Mom ，they are smaller and lighter________they can be carried very easily.A. unlessB. ifC. untilD. so that 13. Dear students ，please read every sentence carefully.________you are ，________mistakes you’ll make. A. The more carefully ；the fewer B. The more careful ；the less C. The more carefully ；the less D. The more careful ；the fewer 14. —I don’t have a partner to practice English________.—Why not join an English language club to practice________？A. ／；speakingB. with ；to speakC. ／；to speakD. with ；speaking 15.Chen Keyu, a ________ boy, from Jiangsu, became the winner of CCTV’s 2014 Dictation Assembly of Chinese Characters(汉字听写大会) on Oct. 3.—Loving reading and having his own way of memorizing make him successful.A. 13 years oldB. 13-year-oldC. 13 years’ old 16. I’m not good at ______English, but I know Australia is an ______country.A. spoken; English-spokenB. speaking; English-speakingC. spoken; English-speakingD. speaking; English-spoken 17. — What do you think of Beijing?— Wonderful. It ________ changed a lot in the last few years.A. haveB. hasC. isD. was 18. The scientists many secrets of the universe.A. foundB. inventedC. discoveredD. looked for 19. He didn’t pay attention to the news.A. listen toB. listeningC. listenD. listening to 20. —How about ________ in the river with us?—Sorry ，I can’t. My parents often tell me ________ that.A. swim ； don’t doB. swim ； to doC. swimming ； not doD. swimming ； not to do二、完形填空(1)I like English very much.I think English is very important and 1 .Here are my opinions of 2 English well. I think there are many ways 3 learn English. For example, asking the teacher 4 help is very helpful. One of my good 5 said he had trouble 6 English.His7 English is very poor.So he reads aloud every morning.Now he can speak English very well.Watching English showson TV can also be helpful.You can learn many words 8 them.Remember,“Where there is a 9 ,there is a way.”Believe you can do it 10 .21. A. usefulB. useC. usedD. to use 22. A. learnB. learnsC. learningD. learnt23. A. to B. for C. of D. in24. A. to B. for C. of D. by25. A. friend B. a friend C. friends D. friendly26. A. learn B. learning C. to learn D. will learn27. A. speak B. spoken C. speaking D. speaks28. A. by B. on C. from D. to29. A. shall B. can C. will D. could30. A. well B. good C. bad D. worse(2)How can you think in English? I think the best way is to practice as what a football player does every day. During the 1 the football player will pass the ball to his teammates over and over again. So he won’t have to 2 passing the ball in the game; he will just do it. You can train yourself to 3 in English this way. The first step is to think of the words that you use daily, simple everyday words 4 book or shoe or tree. For example, 5 you see a “book” you should think of it in English instead of in your mother language.After you have learned to think of several words in English, then move on to the next step-thinking in 6 . Listening and repeating is a very useful 7 to learn a language. Listen first and don’t care too much about 8 you fully understand what you’re hearing. Try to repeat what you hear. The more you listen, the 9 you learn. After you reach a higher level, 10 having conversations with yourself in English. This will lead you to think in English.31. A. practice B. break C. game D. day32. A. wait for B. think about C. look at D. give up33. A. speak B. say C. tell D. think34. A. in B. about C. like D. from35. A. whatever B. whichever C. whenever D. however36. A. sentences B. passages C. lessons D. classes37. A. idea B. step C. way D. plan38. A. which B. if C. how D. unless39. A. harder B. less C. later D. more40. A. remember B. stop C. start D. finish三、阅读理解（1）Students learn their lessons in class. They sit in the classroom listening to their teachers. This is a way of learning. Is this the only way for students to learn? Of course not. There is another way to learn. Students can teach themselves. For example, if you cannot remember something when you are doing your homework, what will you do? You can look at your book to find the answer.How to teach yourself? The first thing you do is reading. Read something you are interested in, or you have to read. The second is that you must ask yourself questions. A clever student is usually good at asking questions. The third is to answer the questions yourself by working hard, by reading books, and sometimes by asking other people. These are the ways of teaching yourself. If you keep doing like these for a long time,you are sure to have great progress in your study.41. Students usually sit in the classroom their teachers.A.listening toB.looking atC.talking to42. If you can’t remember something when you are doing your homework, you can look at to find the answer.A.your bookB.your magazineC.your newspaper43. From the passage, we know a clever student is usually good at .A.telling storiesB.asking questionsC.playing volleyball 44. If you want to teach yourself, you must learn to first.A.writeB.speakC.read45. How many ways of teaching yourself are mentioned(提到) in the passage?A.Two.B.Three.C.Fou（2）It is true that people with better education are usually able to get better paying jobs. In other words, they have more chances to choose a good job while people with little or no education don’t. It seems that the purpose of education is to make people get jobs. But this isn’t accepted by all people.Some people may think that a person should spend the best years of his life getting education only for a way of living. This was probably one of the earliest reasons of education. In fact, if education is just a way of making a living, people don’t need t o spend so much time in school. People can get education for a living in a short time. Subjects like history and geography need not be taught to everyone. Even languages and mathematics need not be taught in detail (详细地), either. Here it is clear that education is much more than teaching a man to get a way of living.Education is well-rounded and it is mainly for improving a man. It is not only to teach him to speak, read and write, but also to develop his creative thinking and other abilities. After that, it is to make him a wise man and thankfully enjoy the achievements of human. Education is to make a man lead a better life. Educated people are expected to be able to listen to good music, read good books, watch plays and most of all take an interest in the world.I would agree that making a good living is an important reason for education, but certainly not the most important or the main reason.46. People with little education usually .A.spend a long time in schoolB.have a good chance to get a jobC.spend the best years to choose jobsD.have fewer chances to get a good job47. The earliest reason of education was probably to .A.make a man lead a better lifeB.teach a man to write and thinkC.make people get a way of livingD.teach people to read good books48. The underlined word “well-rounded” in the passage means“”in Chinese.A.圆满的B.崭新的C.公平的D.全面的49. It is expected that educated people will be able to .A.accept education as a way of livingB.take an interest in the whole worldC.develop their abilities to make playsD.learn subjects like languages and math50. The passage mainly tells us that .cation should make a man improveB.people can get education in a short timeC.people should be able to get better paying jobsD.all subjects are so important for a way of living(3)Reading is the key to school success and, like any other skill, it takes practice. A child learns to walk by practicing until he no longer has to think about how to put one foot in front of the other. An excellent sportsman practices until he can play quickly, correctly and without thinking. Educators call it “automaticity(自动性)”.A child learns to read by sounding the letters and finding the meaning of the words. With practice, he stumbles第2页共3页less and less, reading by the phrase(短语). With automaticity, he doesn’t have to think about the m eaning of words, so he can give all his attention to the meaning of the text.It can begin as early as the first grade. In a recent study of children in Illinois schools, Alan Rossman of Northwestern University found that automatic readers in the first grade not only read almost three times as fast as the others, but also got better results in exams.According to Rossman, the key to automaticity is the amount(数量) of time a child spends reading, not his IQ. Any child who spends at least 3.5 to 4 hours a week reading books, magazines or newspapers will probably reach automaticity. It can happen if a child turns off TV just one night for reading at home.You can test yourself by reading something new that is suitable (适合)for your level. If you read aloud with expression,with a sense of the meaning of the sentences, you probably are an automatic reader. If you read brokenly, one word at a time, without expression or meaning, you need more practice.51. “Reading is the key to school success” means that reading .A.helps school develop fasterB.is a key to a successful schoolC.helps students go to a key schoolD.can improve students’ learning results52. Children with “automaticity” can read faster because they.A.know how to read the wordsB.do not have to think while readingC.read by themselves without any helpD.pay attention to the meaning of the text53. Rossman tells that any child who will possibly be an automatic reader.A.seldom turns off TVB.reads books by the word quicklyC.spends about an hour reading every dayD.gets the same grades as others in exams54. The underlined word “stumbles” in the passage means “”in Chinese.A.结结巴巴地读B.全神贯注地读C.心不在焉地读D.声情并茂地读55. The best title for the passage is“”.A.IQ Is the Key to the Automaticity Is Bad for Children’s ReadingC.Automaticity Depends on PracticeD.Automatic Readers Will Be Successful四、翻译句子根据汉语和英文提示完成英语句子。
沪教版九年级英语完成句子专项练习一
沪教版九年级英语完成句子练习题一、完成句子，每空一词。
1.为什么这种生物灭绝了?Why did such kind of living things ?2.让我们去公园散步吧!Let's in the park!3.我爸爸过去常常在河边钓鱼。
My father by the river.4.父母不期望我们做家务Parents don't the housework.5.这本书很无聊，我对它没有兴趣。
This book is so boring, I in the park!6.我爸爸过去常常在河边钓鱼。
My father it.7.年轻人依靠父母是不对的。
It's wrong of young people to their parents.8.与那件蓝色的毛衣相比，我喜欢那件黄色的毛衣。
the blue sweater, I like the yellow one.9.除伦敦外，我还喜欢巴黎和悉尼。
London, I like Paris and Sydney.10.我得对我妈妈有耐心。
I will have to be my mother.11.从2012年我一直和艾丽斯保持联系。
I have Alice since 2012.12.在世界上有--些喜欢在白天睡觉的动物。
There are some animals that like sleeping in the world.13.父母不让他们的孩子接近动物园里危险的动物。
Parents their children the dangerous animals in the zoo.14.新时尚很快就会过时，不是吗？New fashion soon ,don’t they?15.你介意把音乐关小点吗?Do you mind the music?16.我们应该对他人友好。
We should others.17.我已经学会如何使用电脑了。
新译林版英语九年级上册语法专项练习一有答案
9A 期末复习语法专项练习一Ⅰ. 根据句子意思，用括号中所给动词的适当形式填空。
1. Please show me the way if you (know) it.2. He will lose marks in the exam unless he(improve) his handwriting.3. We (go) hiking this Sunday if we(have) time.4. I (park) my car in the car park unless it (be) full.5. They will do the job better if someone ______ (give) them some advice about it.2. — Why was Jenny late yesterday morning?—she didn’t catch the 7:00 bus.’t trouble him.4. You will have a toothache you brush your teeth every day.5. We’ll have a barbecue (烧烤) the weather is fine tomorrow.6. I will just buy a birthday cake for my mother I can think of a better idea.7. You will pass the exams you work harder.8. — Shall I wake you up tomorrow morning?you wake me up.9. Air has weight, it is very light.11. The woman spoke fast I couldn’t follow her.12. Sally is wearing a nice hat she looks very beautiful.13. This is good a book all of us like it very much.14. These were difficult questions none of us could answer them.15. There are many stars in the sky I can’t count them.16. It was hot weather they all went swimming.he can pass the coming exams.I have ever read.19. He’s the boy won the photography competition last year.20. The room in he lives is very nice.21. We talked about things and people we remembered.22. This is the magazine we talked about just now.Ⅲ. 同义句转换，每空一词。
九年级课外文言文阅读练习一(含答案)
（一）戴胄犯颜①执法上②以兵部郎中戴胄忠清公直，擢③为大理少卿。
上以选人多诈冒资荫④，赦令自首，不肯者死。
未几，有诈冒事觉者，上欲杀之。
胄奏：“据法应流⑤。
”上怒曰：“卿欲守法而使朕失信乎?”对曰：“敕者出于一时之喜怒，法者国家所以布⑥大信于天下也。
陛下忿选人之多诈，故欲杀之，而既知其不可，复断之以法，此乃忍小忿而存大信也。
”上曰：“卿能执法，朕复何忧!”胄前后犯颜执法，言如涌泉，上皆从之，天下无冤狱。
【注释】①犯颜：冒犯君主的威严。
②上：指唐太宗。
③擢：提升。
④资荫：资即资格;荫指封建时代子孙因祖先的官爵而受到封赏。
⑤流：把犯人放逐到边远的地方服劳役。
⑥布：昭示。
1、解释句中加点的词：①末几，有诈冒事觉．者觉：②陛下忿．选人之多诈忿：③故．欲杀之故④天下无冤狱．狱．2、翻译下列句子。
①上以选人多诈冒资荫④，赦令自首，不肯者死。
②卿欲守法而使眹失信乎？3、结合文意简要分析戴胄的品质。
（二）鲁人曹沫①曹沫者，鲁人也，以勇力事鲁庄公。
庄公好力②。
曹沫为鲁将，与齐战，三败北。
鲁庄公惧，乃献遂邑③之地以和，犹复以为将。
齐桓公许与鲁会于柯④而盟。
桓公与庄公既盟于坛上，曹沫执匕首劫齐桓公，桓公左右莫敢动，而问曰：“子将何欲?”曹沫曰：“齐强鲁弱，而大国侵鲁亦甚矣。
今鲁城坏即压齐境，君其图之!”桓公乃许尽归鲁之侵地。
既已言，曹沫投其匕首，下坛，北面就群臣之位，颜色不变，辞令如故，桓公怒，欲倍其约。
管仲曰：“不可。
夫贪小利以自快⑤，弃信于诸侯，失天下之援，不如与之。
”于是桓公乃遂割鲁侵地，曹沫三战所亡地，尽复予鲁。
【注释】①这里所选的是《史记》中《刺客列传》的第一部分。
②好力：喜欢勇士。
力，有力之士。
③遂邑：今山东宁阳县。
④柯：齐邑，今山东阳谷县阿城镇。
⑤快：快意。
1、解释下列句中加点词语：①乃献遂邑之地以和．和．＿＿＿②桓公与庄公既．盟于坛上既＿＿＿③北面就．群臣之位就＿＿＿④曹沫三战所亡．地亡＿＿＿⑤欲倍．其约倍＿＿＿2、翻译下列句子。
通用～学年度第一学期九年级语文阶段练习(一)含答案
2019～2019学年度第一学期九年级语文阶段练习（一）班级姓名1.名著阅读：选出对下列名著有关内容的表述错误的两项。
（3分）------------------------- 【▲】【▲】A.格列佛生于洛丁加姆州，从十四岁开始在英国与荷兰的大学中念书，后来以外科医生的身份到船上工作，经过数次航行后在伦敦定居。
B.格列佛最后航行到一个慧骃国的地方，那里的人外形好像马，缺乏智慧、自制力和礼节，就像生存在幻境中似的，对人类十分排斥。
C.《朝花夕拾》中《琐记》、《藤野先生》、《无常》三篇作品，记述鲁迅离开家乡到南京、日本求学和回国后的一段经历，留下青年鲁迅在追求真理的人生道路上沉重的脚印。
D.《五猖会》记述儿时盼望观看迎神赛会的急切、兴奋的心情，和被父亲强迫背诵《鉴略》的扫兴而痛苦的感受。
指出强制的封建教育对儿童天性的压制和摧残。
E.祥子没有轻易忘记自己的车被抢的事。
一想起这事，他心中就觉得发怵。
他恨不得马上就能买上一辆新车。
为此，他更加拼命地挣钱，甚至不惜去抢别人的生意。
2.任选一幅哲理漫画为其配上蕴含生活道理的文字。
（2分）我选图，配文：3.请写出王昌龄《听流人水调子》里写到的几个典型场景。
（3分）孤舟微月对枫林，分付鸣筝与客心。
岭色千重万重雨，断弦收与泪痕深。
注释：①流人：离开家乡，流浪外地的人。
②水调子：指水调歌这首乐曲，曲调哀切。
③这首诗大约写于王昌龄晚年赴龙标（今湖南黔阳）所贬途中。
4.研读下面材料探究《舌尖上的中国3》遭吐槽的原因。
（4分）材料一：第二集中煎饼馃子摊的下岗再就业大妈，第四集里关于中药自制口红的片段，观众感觉放在美食纪录片有点奇怪。
第三集里，有将近1/4的时长在讲武术家如何收徒、传承武术。
第一集解说词中“集万物于一山（的野生蜂蜜），使得蜂蜜饱含清甜”。
事实上蜜源植物繁杂的蜂蜜不会清甜，反而会带有药味；云南石锅并不起源于云南，而是四川。
有人分析，“舌尖”第一、二季的成功与“人肉餐饮地图”陈晓卿密不可分，他的团队都没有参与第三季拍摄。
九年级科学上册 基础练习(一) 试题
轧东卡州北占业市传业学校九年级上科学根底练习〔一〕班级一、选择题〔每题2分，共80分〕( )1.以下著名诗句中隐含着化学变化的是A.白玉做床,金做马B.千里冰封,万里雪飘C.野火烧不尽,春分吹又生D.夜来风雨声,花落知多少( )2.一些食物的近似PH如下,葡萄-,苹果-,牛奶-,鸡蛋清-8.0,当某人胃酸过多时,适合食用的食物是A 鸡蛋清B 牛奶C 苹果D 葡萄( )3.为了鉴别一桶实验室用的蒸馏水是否被某酸污染,不可取．．．的方法是A 取样品用PH试纸测定样品的PH B取样品滴入石蕊试液C取样品滴入酚酞试液 D测试样品参加铁粉( )4.以下化学实验根本操作中,正确的选项是A 将用剩下的药品放回原试剂瓶中B 给试管中的液体加热,液体体积不超过试管容积的2/3C 用酒精灯的外焰局部给物质加热D 稀释浓硫酸时,把水迅速地倒入浓硫酸中( )5.以下物质能长期放置在敞口的容器中,质量变少的是A.氢氧化钠固体B.石C.浓硫酸D.浓盐酸( )6.用一种试剂鉴别稀盐酸、氯化钠溶液和氢氧化钠溶液，应选用的试剂是A.氯化钡溶液B.紫色石蕊试液C.硫酸银溶液D.无色酚酞试液( )7.以下物质呈碱性的有A.胃酸B.蒸馏水C.氢氧化钙溶液D.食醋( )8.在氢氧化钠溶液中参加1-2滴的酚酞试液,然后逐滴滴入稀硫酸,直至反响完成.在这个过程中溶液颜色的变化为A.红色→无色→无色B. 无色→蓝色→红色C.无色→红色→无色D. 红色→无色→红色( )9.盛有石灰水的试剂瓶时间久了,内壁常附有一层白膜,要洗去这层白膜最好的方法A.用水洗B.用氢氧化钠溶液洗C.用盐酸洗D.先用盐酸洗再用水洗( )10.以下气体可以用氢氧化钠来枯燥的是A.氢气B.二氧化碳C.二氧化硫D.三氧化硫( )11.体操运发动在上器械前常用“镁粉〞搓手，“镁粉〞的主要成分是MgCO3，它属于A. 氧化物B.酸C. 碱D.盐( )12.鱼胆弄破后会使粘上难溶于水的胆汁酸〔一种酸〕而变苦，要减少这种苦味，用来洗涤的最正确物质是A.水B.纯碱C.食盐D.食醋( )13. 以下反响中，属于复分解反响的是A、S+O2点燃SO2B、2H2O通电2H2↑+O2↑C、C+2CuO高温2Cu+CO2↑D、2HCl+CuO=CuCl2+H2O( )14.尿素CO(NH2) 2是一种高效化肥，它属于A.氮肥B.磷肥C.钾肥D.复料( )15.某金属放入稀硫酸中不产生气泡，该金属可能是A.MgB.AlC.ZnD.Ag( )16.以下习惯不利于生健康成长的是A.只喝优质蒸馏水B.均衡摄入糖，蛋白质，维生素，水等营养素C.教室多开窗，以吸入新鲜的空气D.不吸烟，以防止摄入有害物质( )17.小芳收集了一些衣料的纤维，各取一局部做燃烧实验。
人教版 九年级数学(上)二次函数 专项练习1 【含答案】
人教版 九年级数学（上）二次函数 专项练习1一、选择题（本大题共10道小题）1. 抛物线2321y x x =-+-的图象与坐标轴交点的个数是（）Ａ．没有交点Ｂ．只有一个交点Ｃ．有且只有两个交点Ｄ．有且只有三个交点2. 关于抛物线y ＝x 2﹣（a+1）x+a﹣2，下列说法错误的是（ ）A ．开口向上B ．当a ＝2时，经过坐标原点OC ．不论a 为何值，都过定点（1，﹣2）D ．a ＞0时，对称轴在y 轴的左侧3. 二次函数y ＝x 2－2x ＋4化为y ＝a(x －h)2＋k 的形式，下列正确的是( )A. y ＝(x －1)2＋2B. y ＝(x －1)2＋3C. y ＝(x －2)2＋2D. y ＝(x －2)2＋44. 对称轴是直线的抛物线是（ ）2-=x A. B. C. D. 22+-=x y 22+=x y 2)2(21+=x y 2)2(3-=x y 5.二次函数y ＝ax 2＋bx ＋c(a≠0)的图象如图所示，下列结论：①b<0；②c>0；③a＋c<b ；④b 2－4ac>0，其中正确的个数是( )A. 1 B. 2 C. 3 D. 46.函数2y ax bx c =++的图象如图所示，那么关于x 的一元二次方程230ax bx c ++-=的根的情况是（）Ａ．有两个不相等的实数根Ｂ．有两个异号的实数根Ｃ．有两个相等的实数根Ｄ．没有实数根7. 若二次函数y ＝ax 2－2ax ＋c 的图象经过点(－1，0)，则方程ax 2－2ax ＋c ＝0的解为( )A. x 1＝－3，x 2＝－1B. x 1＝1，x 2＝3C. x 1＝－1，x 2＝3D. x 1＝－3，x 2＝18.已知二次函数y ＝ax 2﹣2ax+3（a ＞0），当0≤x≤m时，3﹣a≤y≤3，则m 的取值范围为（ ）A ．0≤m≤1B ．0≤m≤2C ．1≤m≤2D ．m≥29.已知二次函数y ＝(x －h)2＋1(h 为常数)，在自变量x 的值满足1≤x≤3的情况下，与其对应的函数值y 的最小值为5，则h 的值为( )A ．1或－5B ．－1或5C ．1或－3D ．1或310. 如图，正方形ABCD 中，AB ＝8cm ，对角线AC ，BD 相交于点O ，点E ，F 分别从B ，C 两点同时出发，以1cm/s 的速度沿BC ，CD 运动，到点C ，D 时停止运动，设运动时间为t(s)，△OEF的面积S(cm 2)，则S(cm 2)与t(s)的函数关系可用图象表示为( )二、填空题（本大题共10道小题）11. 二次函数的图象关于原点O （0,322--=x x y 0）对称的图象的解析式是_________________。
上海牛津版九年级上英语9AU1练习卷一和参考答案
上海牛津版九年级上英语9AU1练习卷一和参考答案1.If you look at the painting carefully。
you can see that it represents a human figure.2.Peter is good at English。
but sometimes he still has a few problems.3.XXX.4.You must put on the thick coat。
or you'll XXX.5.XXX heard the cry for help。
he rushed out of the room.6.Could you tell me where I can put my bicycle?7."Hello。
Is that Mr。
Jiang?" "No。
he went to Guiyang。
He will be back in more than three weeks."8.My father has been to Beijing five times。
and he said he would go there again.9.The manager has XXX.10.China has been a member of the WTO。
It is important to note that English is also an important language in nal trade and XXX.11.- "My grandmother is in the hospital。
I'm ready to visit her." - "I'm sorry to hear that."12.Jenny is not in the classroom。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
九年级练习一（98初赛）１０．当盛油的厚壁钢瓶内压强很大，相当于大气压的１万到２万倍时，虽然瓶壁无裂痕，瓶内的油依然能从里面渗出，这时因为；( )Ａ．金属原子间有空隙；Ｂ．油分子被压小了；Ｃ．油分子不停地做无规则运动； D.金属原子不停地做无规则运动。
（上海16初赛）7．实验室测量油膜分子的大小：取待测油1mL，滴入容量瓶中，再向容量瓶中倒入某有机溶剂直至总体积达到500mL．用滴定管取去1/25mL滴入水槽中．由于该有机溶剂与水的结合力远大于油，故水面最终留下了一层油膜，测出其面积约500cm2，则该油膜分子的直径约为( )A．1.6×10-9m B．1.6×10-10m C．3.2×10-9m D．3.2×10-10m（10年学而思杯初二）18、（4分）某同学想知道分子直径大约有多少，由于分子直径很小，直接用显微镜无法看到，也没有如此小的测量工具．小明分析：如果将很少的油，滴在足够大的水面上，油就能平铺成单分子层请你帮助小明一起完成测油分子直径的实验．①用滴管和量筒测出100滴油的体积，记为V；②将少量痱子粉均匀撒在脸盆的水面上，用滴管滴入一滴油，油面散开；③找一块玻璃板画上边长为L的正方形作标格，盖在脸盆上，视线垂直，描出轮廓，如图，记下格数，算出面积为＿＿＿＿＿．④计算油分子直径为＿＿＿＿＿＿＿．（05大连初三预赛）15.利用扫描隧道显微镜（STM）可以得到物质表面原子排列情况，从而可以研究物质的构成规律。
如图8所示照片是一些晶体材料表面的STM图像，通过观察比较，可以看到这些材料都是由原子在空间排列而构成的，具有一定的结构特征，则构成这些材料的原子在物质表面排列的共同特点是：（1）_______________________________________；（2）_____________________________________。
（94复赛）1．夏天，在天平左盘中放一敞口玻璃杯，杯中有一冰块，右盘中放有一定质量的砝码，这时天平是平衡的，过了几分钟后，天平失去了平衡，天平向______倾斜了，原因是__________________________________。
（92初赛）4．为了比较准确地测出一堆相同规格的小橡胶垫圈的数量（估计为1000个），最好采用下列哪种方法？( )A．将这些垫圈叠在一起，用刻度尺量出总厚度L，再量出一个垫圈的厚度L1，即为垫圈总数，即为垫圈总数B．将这些垫圈叠在一起，用刻度尺量出总厚度L，再量10个垫圈的厚度L1C．用天平测出这些垫圈的总质量M，再测出一个垫圈的质量M1，即为垫圈总数D．用天平测出这些垫圈的总质量M，再测出10个垫圈的质量M10,即为垫圈总数（95初赛）10．某同学用托盘天平测一物体的质量，测量完毕后才发现错误地将物体放在了右盘，而将砝码放在了左盘。
因无法重测，只能根据测量数据来定值。
他记得当时用了50g、20g 和10g三个砝码，游码位置如图所示，则该物体的质量为( )A ．81.4g 。
B ．78.6g 。
C ．78.2g 。
D ．81.8g 。
（97复赛）1．某初中生的体重是下面数据中的一个，则应该是： ( )A ．4牛顿B ．40牛顿C ．400牛顿D ．4000牛顿20、甲、乙、丙三同学先后用一个不等臂天平来称量某散装物品。
甲先取一部分物品放在右盘，当左盘放人7克砝码时，天平正好平衡；接着，甲又取另外一部分物品放在左盘，当右盘放人14克砝码时，天平正好平衡，甲将前后两次称量的物品混合在一起交给了老师。
乙、丙均采用了相同的方法，只不过乙前后两次在左、右盘内放置的砝码分别为10克、10克；丙前后两次在左、右盘内放置的砝码分别为9克、12克。
老师把三位同学交来的物品用标准天平来称量，发现上述三位同学称出的物品中，有一位同学称量的正好是20克，那么该同学一定是( )(A)甲 (B)乙 (C)丙 (D)甲、乙、丙均有可能1下列估测中最接近生活实际的是 （ ）A 、一只梨重约0.15牛B 、人步行的速度约5米/秒C 、教室里空气的质量约0.5吨D 、一支新中华2B 铅笔的长度约40厘米02年广西初二初）6．一架托盘天平游码标尺上的最小刻度是0.2g ，标尺上的最大示数是5g ．把天平放在水平台上调好后，城天平的左盘放入被测物体，右盘放人一个5g 的砝码，横梁指针指在分度盘中线的右边；从右盘取出5g 砝码后，放入两个2g 的砝码，指针指在分度盘中线的左边，要测出测物体的质量，应 ( )．A ．将平衡螺母旋出B ．以5g 和4g 的平均值4.5g 作为被测物体质量C ．将平衡螺母旋进D ．移动游码，使指针指在分度盘中线（99复赛）4．有一空心球，将它放入水中静止时，露出水面的部分占整个球体体积的1/3；若把球的空心部分充满水，则它可悬浮于水中的任一位置．此球空心部分的体积与整个球体体积之比是 ．（浙江10届初赛）5．如图所示，悬吊的实心金属球缓慢浸没于盛满水的大烧杯水中，沉到底部，则从大烧杯溢出流入小烧杯中的水和此金属球的关系是（ ）A ．两者体积和质量都不相等B ．两者体积相等，小烧杯中水的质量较大C ．两者体积相等，小烧杯中水的质量较小D ．两者质量相等，小烧杯中的水体积较大 （10年学而思杯初二）10、（2分）现有质量均为m 的甲、乙两种金属，密度分别为12ρρ、（12ρρ＞），按一定比例混合后，平均密度为122ρρ+，求混合后的最大质量为 （不考虑混合后的体积变化）（94复赛）8．冻豆腐里面有小孔的成因是： ( )A ．豆腐自身冻缩而成B ．豆腐自身膨胀而成C ．外界的冰雪扎进豆腐里而成D ．豆腐里面的水受冻先结冰，再熔化成水后而成 （上海15初赛）5 两个完全相同的容器分别装有两种不同的液体，如图所示，已知甲图中的液重大于乙图中的液重，因此可以肯定（）（A ）甲图中的液体密度小于乙图中的液体密度，（B ）甲图中的液体密度大于乙图中的液体密度，（C ）甲图中的液体密度等于乙图中的液体密度，（D ）上述三种答案都可能出现。
02年广西初二初）4．测得一铜铝合金球的密度为ρ=6×103kg ／m 3，设其中所含铜和铝的体积分别为V 铜、V 铝，为了比较V 铜和V 铝的大小，又由查表得知铜和铝的密度分别为ρ铜=8.9×103kgm 3、ρ铝= 2.7×103kg ／m 3．于是可以断定( )．A ．V 铜> V 铝B ．V 铜=V 铝C ．V 铜< V 铝D ．以上三种情况都有可能（10年学而思杯初二）12、（2分）粗测一高度为L 的酒瓶的容积，办法是先测出瓶的直径D ，再倒入部分的水（大半瓶水，正立时近弯处），如图所示，测出水面高度1L，然后堵住瓶口，将瓶倒置，测出水面高度2L，则瓶的容积为＿＿＿＿＿．（92初赛）不同品种，不同产地的小麦，即使麦粒都很饱满，其中各种成分的比例及麦粒的坚实度也不一样，因此麦粒的密度也略有不同。
请你利用实验课上用过的仪器，设计一个测定饱满麦粒密度的实验方案，要求：1．写明所需器材、测量步骤及操作中为减小误差而需要注意的事项；2．用字母代表物理量，写出计算麦粒密度的公式。
（93初赛）7．量筒做得细而高（图3所示），不做成粗而矮的形状，这主要是因为( ) A．实验中，细高的量筒便于操作。
B．细高的量筒可以做出相对较大的底座，增加稳度。
C．细高的量筒与粗矮的相比，相应的刻度间隔较大，便于准确地读数。
D．粗矮量筒中的液体较多，筒壁所受压强较大，需用较厚的玻璃，因而不便读数。
（95初赛）1．某工厂生产酒精，要求含水量（按质量计算）不超过10％，他们用抽测密度的方法对产品进行检查，则合格酒精的密度应在______千克／米3至______千克／米3范围内。
（不考虑酒精与水混合后的体积变化）（97初赛）4．为制作高度为2米的英雄塑像，先用同样材料精制一个小样，高度为20厘米，质量为3千克，那末这个塑像的质量将是______吨。
（22 届上海大同杯）27、积雪会造成简易厂房和集贸市场屋顶坍塌事故，新下的积雪密度约为0.1克/厘米3 ，一夜积雪厚度为10厘米，则家用轿车车顶雪的质量约为A、4千克。
B、40千克。
C、400千克。
D、4000千克。
（上海14届上科杯）3．鸡尾洒是由几种不同颜色的酒调配而成的．经调配后不同颜色的酒界面分明，这是由于不同颜色的酒有（）Ａ．不同质量 Ｂ．不同体积 Ｃ．不同温度 Ｄ．不同密度（上海15初赛）6把一块金属放入盛满酒精（ρ酒精＝0.8⨯103千克/ 米3）的杯中时，从杯中溢出8⨯10－3千克酒精，若将该金属块放入盛满水的的杯中时，从杯中溢出水的质量（）（A）大于8⨯10－3千克，（B）等于8⨯10－3千克，（C）小于8⨯10－3千克，（D）大于10⨯10－3千克。
（97复赛）11．已知砖的密度为1.5×103千克/米3，用长25厘米、宽12厘米、厚6厘米的砖块砌房子的墙，若房子内外墙的总面积为720平方米，墙的厚度为25厘米，则修建此房约需砖_______块，如果汽车一次能装载4吨，则最少要拉______次才能将这些砖拉来。
（97复赛）15．有一块金、铜合金块，总质量为185.5克，合金块的体积为15厘米3，已知ρ金=19.3×103千克/米3，ρ铜=8.9×103千克/米3，则可知此合金含金_______克。
（98初赛）９．已知某种食用油的密度为0.9×１０3千克／米3，在准备了８个容量为１．２５升的饮料瓶去商店采购食油，最多可装_____千克食油。
（94初赛）2．一个质量为50千克的人，他整个身体的体积大约是( )A．0.005米3。
B．0.01米3。
C．0.05米3。
D．0.l米3。
12．密度是物质的属性之一，至今人们知道具有最大密度和最小密度的物质分别是：( ) A．黑洞、星际物质B．中子星、慧星C．巨星、氢气D．白矮星、氢气（03初赛）15．(8分)在不同地区，车用燃油的价格会有不同，不同日期的油价也可能不一样，但都不会相差很大．赵明生活在沿海地区，暑假到新疆探亲，在新疆乘坐汽车时却发现了下面的奇怪现象．车辆在甲加油站时，他看到加油机上的示数如右表所示；走过一段路之后，在乙加油站的小黑板上又看到一个如下的价目表．赵明最初非常吃惊：为什么在相距不远的两地，油价相差这么多!但仔细思考之后他恍然大悟，原来两站的计量方式不同．(1)通过计算说明，两个加油站的计量方式有什么不同．(2)为什么在新疆会有两种不同的燃油计量方式，而在沿海地区一般只用一种方式计量?（上海15初赛）7有三个质量相等、球外半径也相等的空心铜球、铁球和铝球，已知ρ铜＞ρ铁＞ρ铝，如果在三个球的空心部分灌满水，则灌满水后，三个球所受重力G铜、G铁和G铝的关系应是（）（A）G铜＞G铁＞G铝，（B）G铜＜G铁＜G铝，（C）G铜＝G铁＝G铝，（D）G铁＜G铜＜G铝。