新人教版九年级第十四单元精选练习题附答案

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人教版九年级全一册物理 第十四章 内能的利用 单元测试(含答案)

人教版九年级全一册物理 第十四章 内能的利用 单元测试(含答案)

第十四章内能的利用单元测试一.选择题1.下列说法正确的是()A.冠状病毒的传播是扩散现象B.即使煤炭没有完全燃烧,其热值也不会改变C.一个物体的内能增加了,一定是它吸收了热量D.因为沙石的比热容比水小,所以吸收相同的热量,沙石比水升温快2.2020年6月23日,我国用长征三号乙运载火箭成功发射第55颗北斗导航卫星!收官之星,组网圆梦。

长征系列火箭使用液态氢作燃料,主要是由于该燃料()A.比热容大B.热值大C.所含热量多D.内能大3.下列对能量转化的描述不正确的是()A.蓄电池充电:电能﹣﹣化学能B.萤火虫发光:生物质能﹣﹣光能C.发电机工作:电能﹣﹣机械能D.内燃机工作:化学能﹣﹣内能﹣﹣机械能4.汽车已经成为现代生活中不可缺少的一部分,现代汽车多数采用四缸汽油发动机,每个气缸都进行四冲程循环。

如图所示是汽油机工作的四个冲程示意图,其中表示做功冲程的是()A.B.C.D.5.一台内燃机运行时各种能量损耗大致为:汽缸散热损失占25%,废气带走的能量占35%、摩擦等机械损耗占10%,则它的热机效率为()A.70% B.30% C.60% D.40%6.汽车发动机一般是汽油机,汽油的热值为4.6×107J/kg,阅读了某汽车发动机的说明书后,将内燃机的能量流向制成如图所示,下列回答错误的是()A.发动机压缩冲程把燃料燃烧产生的内能转化为机械能B.1kg的汽油完全燃烧能够释放4.6×107J 的能量C.为确保发动机正常工作,需用水对其冷却D.该内燃机的效率为30%7.甲、乙两台热机,甲的效率比乙的低,其含义是()A.甲热机消耗的燃料多B.甲热机比乙热机做功少C.做相同的有用功,甲损失的能量比乙损失的多D.甲热机的功率比乙热机的小8.一辆小轿车以某一速度在平直路面上匀速行驶100km,消耗汽油10L,若这些汽油完全燃烧放出的热量有30%用来驱动汽车做有用功,所用汽油的热值为4.6×107J/kg,密度为0.7×103kg/m3,则以下说法正确的是()①小轿车是将机械能转化为内能的机器②这些汽油完全燃烧放出的热量为3.22×108J③汽车消耗的有用热量即有用功为9.66×107J④这辆轿车以该速度匀速行驶时受到的阻力为966NA.①②③④均正确B.只有①②③正确C.只有②③④正确D.只有②④正确9.某个单缸四冲程汽油机的转速是3000转/分,那么每秒钟内燃气对活塞做功次数和活塞冲程数分别是(()A.25次,25个冲程B.100次,100个冲程C.25次,100个冲程D.100次,200个冲程10.能正确描述图中各物理量之间关系的是()A.B.C.D.二.填空题11.如图所示是汽油机的冲程,若汽油机的转速为3000r/min,则ls内汽油机对外做功次。

(人教版)初中英语九年级 Unit 14单元测试卷含答案

(人教版)初中英语九年级 Unit 14单元测试卷含答案

Unit 14I remember meeting all of you in Grade 7.单元测试01第一卷听力部分(15分)Ⅰ.听句子,选择与所听句子相符合的图片(5分)A. B. C.D. E.1.________2.________3.________4.________5.________Ⅱ.听两段较长对话,选择最佳答案(5分)听第一段对话,回答第6~7小题。

6.Where has Jim gone for his holiday?A.To Shanghai.B.To Beijing.C.To Paris.7.Who did David go to Paris with?A. His brother.B.His parents.C.His sister.听第二段对话,回答第8~10小题。

8.How long did Vince skate today?A.About 4 hours.B.About 6 hours.C.About 5 hours.9.When did Vince begin skating?A.At the age of 5.B.At the age of6.C.At the age of 7.10.Who gave Vince the first pair of skates?A.His father.B.His uncle.C.His grandmother.Ⅲ.听长对话和对话后面的问题,选择最佳答案(5分)11.A.He lost his Chinese book. B.He failed the test. C.His teacher can’t help him.12.A.It’s easy. B.It’s difficult. C.It’s interesting.13.A.Math. B. Chinese. C. Science.14.A.Thursday afternoons. B.Saturday afternoons. C.Sunday afternoons.15.A.At school. B.At Ann’s home. C.At Peter’s home.第二卷笔试部分(85分)Ⅳ.单项选择(10分)16.Many students write to Language Doctor to ________ advice about learning English.A.look throughB.ask forC.give upD.worry about17.If you want to change the world, you have to ________ yourself first.A. enjoyB. ask forC. give upD.change18.Who taught you to ________ in music class?A.play the keyboardB.play keyboardC.play on the keyboardD.play on keyboard19.Read the ________ carefully before you take the medicine.A.instructionsB.descriptionsC.collectionsD.expressions20.Who are supposed to be responsible ________ the traffic accident?A.forB.toC.inD.about21.Lily is afraid to speak in public.We should try to help her ________ shyness.A.developB.improveC.overcomeD.reduce22.We have a lot of things to do.But ________ we must get some sleep.A.at onceB. at firstC.first ofallD.all in all23.Many kids ________ volunteers to help others since the terrible earthquake.A.have become;happenedB.have been;happenedC.became;have happenedD.became;happened24.Congratulations ________ all the winners ________ your excellent grades!A.to;onB.to;forC.on;onD.on;for25.I think young people should be ________ knowledge.A.good atB.friendly withC. ready toD. thirsty forV.完形填空(10分)Dear Jenny,How’s it going?Are you busy with your study these days?I’ve been back at school 26 nearly four weeks.I’m very glad to tell you that great 27 have takenplace in our school this term.First of all, we’re asked to"clear our plates" when having our meals and say 28 to wasting.Some of us used to order more than what we could eat.That was a big waste of food.Now we need to 29 the food we order.We should also stop wasting in some other ways.For example, we should turn off the lights when we 30 the classroom.And our school has opened up some fields for us to learn how to grow vegetables.Each class is given a small garden and our class has decided to grow some tomatoes and beans(豆类)in our 31 time.I think that’ll be very interesting.Maybe I’ll be able to 32 you some beans we’ve grown by ourselves next time! What’s more, we have only two classes in the afternoon 33 we have more time for after-school activities.I’m one of the traffic safety volunteers in our school. After school, we take turns to go to the streets near our school and ask people to 34 the traffic rules.Ithink we are having a different school life now!Please write back soon and tell 35 more about your school.Yours,Wang Wei26.A.in B.for C.on D.at27.A.changes B.things C.interests D.lessons28.A.yes B. hello C. no D.thanks30.A.leave B.reach C.open D.build31.A.busy B.free C.happy D.sad32.A.plant B.buy C.post D.lend33.A.because B.when C.before D.so34.A.follow B.make C.break D.thinkⅥ.阅读理解(30分)AWe spend hours, days and years of our lives in our school.Imagine(想象)you could design(设计)your dream school, what would it be like?What would you be doing?We wanted to find out what teenagers around the world thought.Here is what they said:Richard from the USA:My dream school would have a big swimming pool and two soccer fields.It would also have a cinema, a gym and a shopping centre.My school has none of these, and I think there should be more pleasant things for students to do while they are studying.Sonic from Italy:I’d like a room where we can relax and play computer games.I’d also like to have a music room.I think there should be a place for everyone to go and relax after class.Wu from Beijing:I think it would be great to have another day off(休息日)every week besides the weekend.If that day was a Friday or a Monday, we would have a long weekend every week.What fun! I also think school should start later, at about 10 o’clock, and finish earlier.Hannah from Australia:In my dream school, I think the teachers should give us more freedom(自由)and choice about how we study and what we study.I also think it’s not necessary for us to wear school uniforms every day.I really don’t like wearing it.36.There would be ________ in Richard’s dream school.A.a big swimming pool and a music roomB.a room to relax and play computer gamesC.a big swimming pool and a shopping centre37.How many days off does Wu want to have in a week?A.2B.3C.438.Which country is not mentioned(提到)in the passage?A. Italy.B. Japan.C. Australia.39.From the passage we know that ________.A.Sonic from Italy would like a room where she can relax and play computer gamesB.Richard from the USA thinks his dream school should start at 10 o’clockC.Hannah from Australia likes wearing a school uniform every day40.Which is the best title(标题)for the passage?A.Schools in the pastB.Schools todayC.Dream schoolsBMrs Thompson, a school teacher, told the children on the first day that she loved them all the same.But that was a lie.There in the front row was a little boy named Teddy Stoddard.He didn’t get along well with the other children and he always needed a bath. She did not like him.Then Mrs Thompson got to know that Teddy was a very good boy before the death of his mother. Mrs Thompson was ashamed of herself. She felt even worse when, like all her other students, Teddy bought her a present, too. It was his mother’s perfume(香水)。

人教版九年级英语全册 Unit14 单元测试题(含答案)

人教版九年级英语全册 Unit14 单元测试题(含答案)

人教版九年级英语全册 Unit14 单元测试题(含答案)本试题分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。

第Ⅰ卷共5页,满分为75分;第II卷共2页,满分为45分。

本试题共6页,满分120分,考试时间为90分钟。

第I卷(选择题共75分)()1. ― What movie will be shown ______ TV tonight?― Shaolin Temple.A. inB. atC. fromD. on()2. When you travel to a city, you’d better buy a to get more information about it.A. newspaperB. suitcaseC. guidebookD. camera()3. Maybe I have heard of this girl before, but I can ______ remember her name.A. hardlyB. reallyC. mostlyD. easily()4. _______ trees were cut off. And many birds lost their home.A. Thousand ofB. Thousands ofC. Two thousandsD. Two-thousand()5. ― Are you full now?― No. I want ______ apple pies.A. more oneB. one moreC. more twoD. two more( ) 6. You ________ ever saw computers years ago, but now they are everywhere. A. sometimes B. usually C. hardly D. almost( ) 7. This is a very big company. It has______ workers. Do you want to work here?A. five thousandB. five thousandsC. five thousands ofD. five thousand of( ) 8. My job is feeding the cat. Now it’s your turn______ the dog.A. feedingB. to feedC. to have fedD. being fed( ) 9. My friend, Darren, is coming to visit us. I’m looking forward _______ him.A. meetB. meetingC. to meetD. to meeting( ) 10. —The radio is too noisy and there is nothing interesting on it. Why don’t you______ ?—All right. I’ll do that.A. turn it onB. turn it offC. turn it backD. turn it up()11. ― Have you ever________ to a zoo?― Yes, but only once. I visited Beijing Zoo last year.A. goneB. beenC. visitedD. seen()12. ― What are you ______ your suitcase for?― I’m ready for a trip.A. makingB. shuttingC. packingD. putting()13. — How long ______ the movie Aftershock ______?— For just several minutes.A. did; beginB. has; begunC. has; been onD. will; on()14. ― When did you start your math homework?― One hour ago, but I________ it yet.A. didn’t finishB. finishedC. have finishedD. haven’t finished()15. ― What a cool day! How about climbing Mount Tai?― ________. Let’s ask Yang Liu to go with us.A. Never mindB. Not at allC. Sounds greatD. Good luck()16. Please go to the station to _______ when the train to Beijing starts to leave.A. find forB. look forC. find outD. find()17. Mr. Green is rich. He ______ his dog ______ meat.A. feed, onB. feeds, onC. give, toD. feeds, for()18. ________ have you been in China?A. How longB. How oftenC. How soonD. How far()19. He does business in Shanghai. He ______ Shanghai the day after tomorrow.A. leaves forB. is leaving forC. left toD. is leaving to( ) 20. He _______ carefully but he could not ________ his teacher clearly.A. heard, listenB. listen, hearC. listened, hearD. heard, listened ( ) 21. He kissed his wife and then ______ goodbye ______ her when he left home.A. say, toB. said, toC. spoke, toD. said, with( ) 22. We need friends to ________, or we will feel ________.A. chat, aloneB. chat with, lonelyC. speak, lonelyD. talk with, alone ( ) 23. Mike is _______ honest man. I __________ him.A. an, believe onB. a , believe inC. an, believe inD. the, believe ( ) 24. This story ______ tells us how Bill Gates becomes successful.A. mostlyB. mainlyC. mostD. Both A and B( ) 25. ― Thank you very much for your nice present.― ___________.A. I’m very glad you like it.B.No, thanks.C. Oh, it’s nothing.D.No, it’s very cheap()26.---Have you ever______ to Hawaii before?---Yes, it’s beautiful. It is better than any_____ in AustraliaA. gone; beachB. been; beachC. gone; beachesD. been; beaches()27. When we got to the bus stop, the bus ______ for about half an hour.A. has leftB. leftC. has been awayD. had been away()28.---How long have you been a league member?--- ________ .A. A long time agoB. Since two yearsC. For about a yearD. In 2006()29.The parents encouraged their daughter______ her EnglishA. improvingB. improvesC. improvedD. to improve()30.The meeting has already started for about ten minutes but Henry______ yet.He must have something important to do.A. hasn’t led us to itB. has turned pointC. hasn’t appearedD. miss itⅡ. 完形填空(15分)阅读下列短文,选择可以填入空白处的最佳选项。

最新人教版九年级英语全册Unit14单元同步练习及答案(精品试卷)

最新人教版九年级英语全册Unit14单元同步练习及答案(精品试卷)

Unit14 I remember meeting all of you in Grade 7一、单项选择(共20小题;共20分)1. Hurry up, kids! The school bus is coming. Wehave time left.A. fewB. a fewC. littleD. a little2. My cousin had an accident a cold wintermorning.A. inB. atC. onD. for3. The box was too heavy for me to carry, Ipulled it into my room.A. soB. andC. butD. or4. --- will your headmaster come back fromAustralia?--- In a few days.A. How oftenB. How soonC. How fastD. How much5. --- Kevin, is your twin brother the same as you?--- No, I'm than him.A. a little thinB. very thinnerC. much thinerD. a little thinner6. This is just between you and me. You tellanyone about this.A. mustn'tB. canC. shouldD. have not to7. My grandparents in that city since 2008.A. will liveB. liveC. have livedD. were living8. I from Beijing University in 2010 and now Iam working in Mianyang.A. graduateB. graduatedC. was graduatingD. has graduated9. --- What do you remember about Grade 7?--- I remember a prize.A. to winB. winningC. winD. wining10. We'll plant trees tomorrow, and I don'tknow Tom will come and join us.A. ifB. whichC. whatD. where11. --- Peter, is there anything else you want to knowabout China?--- Yes, I am still wondering .A. how is Chinese paper cut madeB. how was the Great Wall built in ancient timesC. why the Chinese people like to play the dragon danceD. why do the Chinese people eat rice dumplings at Dragon Boat Festival12. Robert is just one young overseasChinese has come to visit his ancestor's homeland.A. whoB. whereC. whenD. which13. As a teacher, I love being with my students. You can'timagine how much they knowledge!A. are thirsty forB. are famous forC. are good for14. I you. Please do it by yourself.A. believeB. believe inC. believe withD. believe to15. --- I'm looking forward to my parentssoon. What about you ?--- Me too.A. seeingB. seeC. saw16. --- How many students like this song?--- of us likes it. It sounds terrible.A. NoneB. NobodyC. Every oneD. All17. We can be thankful every day, notjust Thanksgiving Day.A. inB. onC. toD. by18. Tony Frank likes the CD. Theythink the music is too noisy.A. Neither; norB. Either; orC. Both; andD. Not only; but also19. --- will your father be back?--- In two months.A. How longB. How soonC. How oftenD. How many20. The box was than I had expected. I was outof breath when I got home.A. more heavierB. much heavierC. little heavierD. very heavier二、单词拼写(单句首字母填空)(共20小题;共20分)21. Her works were bad and below the required s .22. Read the i carefully before you take the medicine.23. After the earthquake, many families were s .24. I feel a little t , give me a bottle of water, please.25. You should s the situation before doing that.26. How can you o the difficulties?27. I want to be a computer programmer after Ig from the college.28. The m gave the workers two days off yesterday.29. A s room with double beds costs¥160.30. You'd better follow these i (命令,指示) given by your teacher.31. They set up a s country of their own.32. She was very t . She wanted to drink something.33. This s looks into the general health problems the students have in their life.34. Scientists are trying their best to o the disease.35. What will you do when you g from the university?36. The m of the famous company(公司) is only 22 years old.37. I want to book a s room with two single beds.38. You should read the i before you take the medicine.39. We s all of garbage into paper, plastic and metal.40. I'm very t . Let's go and have some water.三、单词拼写(根据中文提示拼写单词)(共20小题;共20分)41. Helen felt quite (渴) after she walked such a long way.42. I (庆祝) myself on my narrow escape.43. What will you do after your (毕业)?44. Ladies and (先生们), we'll have a party next Friday.45. Even if many difficulties remain, we can (克服) them.46. This is a (双的) desk. You two can use it together.47. --- How much does a (标准的) room cost in your hotel?--- 198 yuan a day.48. --- How many students go to school by bike in our class?--- I don't know. Let's (调查) about it.49. I'm (口渴的). Could you please bring me a bottle of water?50. His friends all came to (祝贺) him on his success.51. I'm sure I will get good grades in the (毕业) exam.52. Ladies and (先生), let's help the people in Yushu County together!53. You should learn to (克服) difficulties yourselves. You will feel proud of it.54. Ten is the (两倍) of five.55. The boss likes her very much because the (水准;标准) of her work is high.56. Please tell me the results of that (调查).57. Give me a bottle of water, please. I'm (渴的).58. Let us (祝贺) you on your new success.59. Li Lei wants to be a reporter after his (毕业).60. I am not sure whether the watches are those (绅士).四、翻译(根据中文提示完成句子)(共10小题;共20分)61. She likes singers (很清楚地唱出歌词的).(词数不限)62. Could you tell me (在加拿大是否讲英语)? (speak)63. 你爸爸读过今天的报纸了吗?your father today's newspaper?64. 我确信露西不会生气。

人教版九年级全册单元练习题及答案Unit14同步练习

人教版九年级全册单元练习题及答案Unit14同步练习

⼈教版九年级全册单元练习题及答案Unit14同步练习单元巩固训练(Unit 14)Section AⅠ.根据句意及⾸字母提⽰,填写单词。

1. My uncle is a farmer. He works on a f________.2. Look! The new furniture is made of w_________.3. Wash your hands and wipe them with the t________.4. You should w_______ these flowers every day.5. I will help Grandma l________ the fire.Ⅱ.根据句意,⽤括号内所给单词的适当形式填空。

1. She bought a ________(bath) suit last Sunday.2. I like doing some ________(shop) at weekends.3. She hasn’t ________(feed) the cat yet.4. There are about ten ________(well) in that village.5. Has the camera been_________(pack) yet?Ⅲ.根据句意和汉语提⽰,填写恰当的短语完成下列句⼦。

1. They’ll return ___________(马上).2. Could you please ___________(打扫⼲净) the room?3. Would you like to ___________(与……聊天) others when you travel by train?4. I’m sorry I couldn’t ___________(过会与……通话) you sooner.5. You are supposed to _________(关掉) your mobile phones when having meetings. Ⅳ. 选择可以填⼊空⽩处的最佳答案。

人教版九年级物理全一册《第十四章内能的利用》章节练习题-带有答案

人教版九年级物理全一册《第十四章内能的利用》章节练习题-带有答案

人教版九年级物理全一册《第十四章内能的利用》章节练习题-带有答案学校:___________班级:___________姓名:___________考号:___________一、单选题1.下列关于内能及其利用的说法中,正确的是()A.物体的温度越高,所含有的热量就越多B.热量总是从内能多的物体向内能少的物体转移C.精心保养的汽车发动机可以真正实现“零排放”,它的效率可以达到100%D.四冲程内燃机的做功冲程是将内能转化为机械能2.如图所示为汽油机四冲程工作示意图,下列说法正确的是()A.甲图是吸气冲程,吸入的成分只有空气B.乙图是做功冲程,当飞轮转速是1800r/min时,汽油机1秒对外做功15次C.丙图是排气冲程,将机械能转化为内能的过程D.丁图是压缩冲程,将内能转化为机械能的过程3.如图是四冲程汽油机中的一个冲程,汽油燃烧产生高温高压的气体推动活塞向下运动。

该冲程是()A.吸气冲程B.压缩冲程C.做功冲程D.排气冲程4.2022年9月29日,商飞C919取得了中国民航管理局颁发的适航证,不久的将来,我们就可以坐上国产的大飞机。

下列说法正确的是()A.C919的燃油燃烧得越充分,其热值就越大B.燃油在C919的发动机内燃烧时,化学能转化为内能C.由于采用先进的制造技术,C919发动机的效率可以达到100%D.C919客舱灯光为LED光源,LED的主要材料是超导体5.下图是汽油机一个工作循环的四个冲程,顺序排列正确的是()A.甲乙丙丁B.乙丙甲丁C.丁丙乙甲D.丁甲丙乙6.如图所示是四冲程汽油机的工作原理示意图,下列说法正确的是()A.乙图所示冲程是通过做功的方式使燃料混合物的内能增加的B.甲图是吸气冲程,吸入汽缸的物质是汽油C.丙图所示冲程中,燃气的内能增加,温度升高D.甲、丙、丁图所示三个冲程是靠飞轮的惯性完成的7.2023年5月30日,长征二号F遥十六运载火箭搭载神舟十六号载人飞船成功发射(如图)。

人教新目标九年级英语全册 Unit14 单元测试题(含答案)

人教新目标九年级英语全册 Unit14 单元测试题(含答案)

人教新目标九年级英语全册 Unit14 单元测试题(含答案)一、单项选择。

1.—Will you fix up the machine according to the ________, David?—No problem.A. instructionsB. inventionsC. invitationsD. interviews2.I'm busy now. I ________ to you after school this afternoon.A. talkB. talkedC. will talkD. have talked3.The teacher his students.A. is pride inB. is proud inC. takes pride inD. takes proud of4.—Do you remember ________ me in Kunming?—Yes, of course. Two years ago.A. to seeB. seeC. seeingD. saw5.—I'll have a tennis game tomorrow. I'm a little bit nervous.—Believe in ________. You're the best in our club.A. herselfB. myselfC. yourselfD. himself6.Sally used to be ________, but now she enjoys meeting and talking to new friends.A. activeB. shyC. honestD. outgoing7.Please remember the following things when you are in the museum.________ don't touch the things. Second, don't make much noise.A. First of allB. By the wayC. In factD. So far8.—You look very nice in your new dress today.—Oh, really? I ________ it when it was on sale.A. buyB. boughtC. have boughtD. will buy9.He used to ________ problems getting along with his classmates.A. haveB. hasC. havingD. had10.—Mum, I've got the first prize in the photo competition.—________!A. Good luckB. Not at allC. Good ideaD. Congratulations二、完形填空。

人教版九年级物理全一册《第十四章内能的利用》单元测试卷(附参考答案)

人教版九年级物理全一册《第十四章内能的利用》单元测试卷(附参考答案)

人教版九年级物理全一册《第十四章内能的利用》单元测试卷(附参考答案)学校:___________班级:___________姓名:___________考号:___________一、单选题1.2023年5月30日9时31分,随着一声“点火”令下,我国的长征二号F遥十六运载火箭向下喷出高温燃气,顺利发射升空,将神舟十六号载人飞船送到太空预定轨道。

关于火箭,下列说法错误的是()A.燃气对火箭的推力改变了火箭的运动状态B.升空时,燃气对火箭向上的推力大于火箭对燃气向下的推力C.火箭燃料燃烧时,化学能转化为内能D.火箭发动机是利用内能做功的机械2.在国家取消燃放烟花禁令后,许多节日、婚庆等场合,小朋友玩起一种叫“二踢脚”的鞭炮。

传统意义上,二踢脚指的是一种双响爆竹,它是一种传统的民俗用品,二踢脚的工作原理是利用底部火药爆炸时的冲击力,通过反作用力使爆竹升空。

它由两部分组成:底部的后门被堵塞不严,使得下层火药爆炸时产生的气流能够冲开这个出口,向上喷射,从而产生向前的推力;同时,导火线引燃上层的密闭火药,使其迅速燃烧并再次爆炸,完成升空的过程。

因此,二踢脚因其两次爆炸的声音而得名。

下列说法中错误的是()A.火药燃烧,不断的喷出,相当于内燃机的排气冲程B.爆竹升空时,将火药燃烧产生的内能转化为爆竹机械能C.爆竹升空是因为力的作用是相互的D.火药燃尽后,由于惯性鞭炮还能向上飞行一段距离3.可燃冰是一种藏在深海海底的新型能源,1m3可燃冰可转化为164m3的天然气和0.8m3的水,下列关于可燃冰说法错误的是()A.可燃冰是不可再生能源B.1m3可燃冰比0.8m3的水质量小C.可燃冰形成在压强较大的环境中D.相同体积的可燃冰和天然气完全燃烧后,可燃冰释放的热量多4.如图所示,是用易拉罐做成的一个热风车,下边放一只点燃的蜡烛,风车就会转起来。

四冲程内燃机中与此能量转化相同的冲程是()A.吸气冲程B.压缩冲程C.做功冲程D.排气冲程5.小王周末和家人乘车去游玩,某一时刻她看到汽车转速表显示的转速为1800r/min,她向爸爸了解到汽车发动机为四缸四冲程发动机,则此时汽车在1s内完成了()A.240个冲程,做了60次功B.60个冲程,做了15次功C.120个冲程,做了30次功D.240个冲程,做了30次功6.将一瓶酒精用去一半,则剩余酒精的密度、比热容和热值()A.都不变B.都变为原来的一半C.热值不变,密度、比热容变为原来的一半D.热值变为原来的一半,密度、比热容不变7.如图所示是四冲程汽油机的其中一个冲程的剖面图,下列说法不正确的是()A.该冲程是做功冲程B.该冲程实现了内能向机械能的转化C.该冲程活塞向下运动,两个气门均关闭D.若此汽油机飞轮1min转过1800转,则1s对外做功30次8.八宝盖碗茶是我们甘肃群众男女老幼普遍饮用的一种茶。

最新部编人教版九年级物理全册第十四章单元测试题及答案

最新部编人教版九年级物理全册第十四章单元测试题及答案

九年级物理单元测试题第十四章内能的利用学校:___________姓名:___________班级:___________座号:___________分数:___________一、单项选择题(每小题3分,共21分)1.如图中的四个冲程不是按照热机正常工作的顺序排列的,你认为让汽车获得动力的冲程是()2.如图所示实验,试管口木塞冲出过程()A.试管口出现的白雾是水蒸气B.试管口出现白雾说明水蒸气内能增加C.能量转化情况与内燃机压缩冲程相同D.水蒸气对木塞做功,水蒸气的内能减少3.关于四冲程汽油机,下面说法中正确的是()A.在做功冲程,内能转化为机械能B.汽油机是利用机械能转化成内能的机器C.在压缩冲程,内能转化为机械能D.四个冲程依次为吸气、做功、压缩、排气4.汽车油箱的汽油用掉一半后,剩下的汽油中,不变的物理量有()A.质量密度热值B. 质量密度比热容C. 密度热值比热容D. 质量热值比热容5.关于热机,下列说法正确的是()A.汽油机顶部有喷油嘴,柴油机顶部有火花塞B.柴油机在吸气冲程中,将柴油和空气的混合气吸入气缸C.汽油机和柴油机除了做功冲程外,其他三个冲程都是依靠飞轮的惯性完成的D.改进技术后,热机的效率可以达到100%6.甲乙两台柴油机,甲的效率低于乙的效率,意义是()A.甲的功率大于乙的功率B.甲消耗的燃料多于乙消耗的燃料C.乙将燃料燃烧放出的热量变成有用功的那部分能量的比例比甲大D.工作相同时间甲消耗的燃料一定比乙少7.下列对能量转化描述不正确的是()A、子弹打入墙壁过程中机械能转化为内能B、电动自行车前进,机械能转化为电能C、坠落的流星,机械能转化为内能D、内燃机工作,化学能转化为内能,又转化为机械能二、填空题(每空1分,共21分)8.如图所示,一配有活塞的厚壁玻璃筒里放一小团蘸了乙醚的棉花,当迅速压下活塞时,可看见桶内棉花燃烧起来。

这是通过的方式使玻璃筒内的空气增加、温度升高的。

人教版九年级物理上册第十四章达标测试卷含答案

人教版九年级物理上册第十四章达标测试卷含答案

人教版九年级物理上册第十四章达标测试卷一、选择题(每题3分,共30分)题序 1 2 3 4 5 6 7 8 9 10答案1. 日常生活中没有利用热机的交通工具是()A. 蒸汽机车B. 喷气式飞机C. 山地自行车D. 越野摩托车2. 近年来,我国科技高速发展,航天事业成果辉煌。

未来,国人畅游月球将可能成为现实。

未来的你将驾驶自己设计的月球车在月球上畅游,但月球上没有大气,你设计的月球车作动力装置的设备应为()A. 柴油机B. 汽油机C. 空气喷气发动机D. 火箭喷气发动机3. 如图显示了热机的共同特点,其中虚线框处应该填()(第3题)A. 内能B. 电能C. 动能D. 势能4. 下列关于热值的说法正确的是()A. 2 kg煤的热值大于1 kg煤的热值B. 燃料热值越大,燃烧放出的热量越多C. 燃烧不完全时,燃料热值变小D. 不同种类的燃料热值一般不同5. 下列关于汽油机和柴油机的说法正确的是()A. 在做功冲程中,都是把内能转化为机械能B. 柴油机的点火方式是点燃式,汽油机的点火方式是压燃式C. 构造上,汽油机汽缸顶部有喷油嘴,柴油机汽缸顶部有火花塞D. 吸气冲程中,柴油机吸入汽缸的是柴油和空气的混合物,汽油机吸入汽缸的是空气6. 如图所示,试管中装有水,用带玻璃管的胶塞塞住,在玻璃管口处放一个纸做的小叶轮,用酒精燃料加热试管使水沸腾,观察到玻璃管口冒“白气”,小叶轮转动。

下列说法正确的是()(第6题)A. 小叶轮转动是热传递的结果B. 水蒸气驱动叶轮转动,与内燃机排气冲程原理相同C. 小叶轮获得的能量小于水蒸气的内能D. 酒精燃烧过程中,剩余酒精的热值不断减小7. 北京时间2023年10月26日,搭载神舟十七号载人飞船的长征二号F遥十七运载火箭在酒泉卫星发射中心成功发射。

下列说法正确的是()A. 火箭穿越大气层时外壳的内能增大,主要是通过热传递的方式改变内能B. 若太空温度很低,神舟十七号载人飞船的内能可能为零C. 火箭用液态氢作燃料,氢燃烧将化学能转化为内能D. 长征二号F遥十七运载火箭热机的效率高,所以做功快8. 汽车是现代生活中最常见的一种交通工具,如图甲、乙分别是某汽油机的某冲程示意图及能量流向图。

新人教版九年级物理全册第十四章测试题【含答案】

新人教版九年级物理全册第十四章测试题【含答案】

新人教版九年级物理全册第十四章测试题(时间:90分钟满分:100分)一、选择题(本题共10小题,每小题3分,共30分)1.发射卫星的火箭常使用液态氢作为燃料,主要是因为液态氢具有(B)A.较低的沸点 B.较大的热值C.较大的比热容 D.较小的密度2.(2019·绥化)如图是汽油机一个工作循环的四个冲程,不是靠飞轮惯性完成的冲程是(B)3.如图所示是四冲程汽油机某时刻工作状态的示意图。

在活塞向下运动的过程中,汽缸内气体的(A)A.内能减少B.温度升高C.密度增大D.分子热运动加快4.《流浪地球》被誉为开启了中国科幻电影元年。

这部电影讲述了多年以后太阳急速衰老膨胀,无法再给地球提供能量,人类为了拯救地球而点燃木星周围的可燃气体,逃离太阳系的故事。

其中“点燃木星”将地球推开相当于内燃机的(C)A.吸气冲程 B.压缩冲程 C.做功冲程 D.排气冲程5.(2019·泸州)西昌卫星发射中心用“长征三号”运载火箭,于2019年4月20日将第四十四颗北斗导航卫星成功送上太空。

下列说法中正确的是(C)A.火箭使用液氢燃料,主要是利用了液氢的比热容大B.火箭升空过程中,燃料燃烧将机械能转化为化学能C.北斗导航卫星加速升空过程中,其动能和重力势能均增大D.北斗导航卫星加速升空过程中,其惯性增大6.关于柴油机与汽油机的区别,下面叙述错误的是(B)A.构造上,柴油机汽缸顶部有一个喷油嘴而没有火花塞B.工作过程中,柴油机与汽油机只有一个冲程不同C.柴油机的效率比汽油机高D.柴油机比汽油机经济,但是比较笨重7.为了节约能源,需要提高热机的效率,下列措施不能提高热机效率的是(D)A.让燃料与空气混合充分,使燃料燃烧得更加彻底B.在设计与制造热机时要不断改进与创新,以减少能量的损耗C.尽量减少热机内部各部件间的摩擦,经常保养D.尽量增加热机的工作时间8.在进行如图所示的实验或有关装置工作时,能量转化情况相同的是(C)A.丙和丁 B.乙和丁 C.甲和乙 D.甲和丙9.如图所示是某科技馆的一台“永动机”,由5根轻杆和转轴构成,轻杆的末端装有形状记忆合金制成的叶片,进入热水后因叶片伸展“划水”而转动,离开热水后形状记忆合金迅速复原。

Unit 14单元课时必刷题2022-2023学年人教版英语九年级全册(含答案)

Unit 14单元课时必刷题2022-2023学年人教版英语九年级全册(含答案)

人教版九年级英语单元课时考点突破必刷题(全册)Unit 14 I remember meeting all of you in Grade 7.课时1 Section A (1a-2d)▲Someone was advised to take a break from running by a teacher.考点1 联想串记:advise/advice1.-You'd better advise him________ anything out of the window while driving.-I will. He has to know it's dangerous.A. not throwingB. no throwingC. not to throwD. don't throw2.-Excuse me, Mr. Smith. Could you please give us________ on how to study English well?-No problem.A. some adviseB. any adviceC. some adviceD. any advise▲He gave really clear instructions during P. E. class.考点2 联想辨异:instruction/direction3.-Wow, an iPhone 12, what a big surprise! Thanks, darling.-It's your birthday present. But please read the________ carefully before you use it.A. informationB. instructionsC. invitationD. instrument4.He had a poor sense of________ and soon got lost.A. directionB. medicineC. organizationD. instruction▲She helped you to work out the answers yourself no matter how difficult they were.考点3 联想串记:work out/solve5.Xiong'an New Area will help________ big problems in Beijing, such as traffic jams.A. set outB. check outC. work outD. give out6.Do you know how to work out the difficult math________ problem?(同义替换)A. bring outB. carry onC. solveD. do with▲Shall we get each of them a card and gift to say thank you?考点4 活学活用:Shall I/we....?7.-Shall we go camping to celebrate our graduation?-________ Let's make a plan first.A. No wayB. Good ideaC. It's nothingD. I don't think so答案:1.C点拨:用固定搭配法。

(完整word版)新人教版九年级第十四单元精选练习题附答案

(完整word版)新人教版九年级第十四单元精选练习题附答案

新人教版九年级第十四单元精选练习题附答案Unit 14 I remember all of you in Grade 7.第一课时Section A(1a~2d)01基础过关Ⅰ. 根据句意及汉语提示填写单词。

1. We are doing a ________(调查) about the most popular sport among the students.2. ________(将要) we meet at the school gate tomorrow?3. Our students achieve very high ________(水平) of musical ability.4. Our teacher is showing us a new ________(方法) of writing.5. Jane's husband is ill and she has to do ________(两倍的) work.Ⅱ.用方框中所给单词的适当形式填空。

see,finish,row,instruct,clear6. I sit in ________ Three. Just behind Nancy.7. Read these ________ carefully before you use the machine.8. We should guide the students ________ the survey report.9. The teacher speaks loudly so that the students can hear her ________.10. Didn't you remember ________ me here last year?Ⅲ. 单项选择。

(选出与句子画线部分意义最相近的一项)( ) 11. (泸州中考)Please remember ________ your notebook here tomorrow.A. bringsB. broughtC. bringingD. to bring( ) 12. (武汉中考)—Will you fix up the machine according to the ________,David?—No problem.A. instructionsB. inventionsC. invitationsD. interviews( ) 13. Miss Wang is always patient ________ me.A. toB. aboutC. withD. in( ) 14. I wonder how they are going to explain for losing three games ________?A. in generalB. all of a suddenC. to our surpriseD. in a row( ) 15. Luke told me to take a break from running.A. have a breakB. take a restC. have a restD. all the aboveⅣ. 根据汉语意思完成句子,每空一词。

【精选】人教版九年级全册第十四单元Unit14测试卷(含答案)

【精选】人教版九年级全册第十四单元Unit14测试卷(含答案)

【精选】人教版九年级全册第十四单元Unit14测试卷(含答案)(限时:60分钟满分:100分)一、单项选择(每小题1.5 分,共15 分)1. His parents are ________ him because his scores ________ in the final exam.A. proud of; doubledB. pride of; doublingC. proud of; doublingD. pride of; doubled2. Boris was so hard-working that he came first four times ________ in the Chineseexam.A. in silenceB. in a rowC. in surpriseD. in person3. [2023 黄石改编]—Could you tell me the ______ of making such tasty dumplings?— Well, I just follow the steps on the guidebook.A. costB. methodC. timeD. menu4. [2023 十堰] — How did you fix up the machine, Dad?—It’s easy. I just followed the ________.A. instructionsB. inventionsC. interviewsD. influences5. —________ the past three years, which teacher will you miss most?— Miss Lin. She helped me a lot.A. Looking back atB. Looking forC. Looking likeD. Looking after6. Miss Wang is patient ________ me and always encourages me ________ hard.A. to; studyB. with; to studyC. with; studyD. in; studying7. [2023 本溪、葫芦岛] We should be ________ our parents. They have done a lotfor us.A. thirsty forB. thankful toC. angry withD. similar to8. You should ________ the preparation of this party. Don’t ________.A. be thirsty for; set outB. be responsible for; make a messC. separate from; be in a rowD. be thankful to; make a mess9. I ________ what you said, but I don’t ________ you.A. believe; believe inB. believe in; believeC. believe; believeD. believe in; believe in10. [2023 石家庄期末] —Dad, I’ve won first place in the singing competition.—________A. Good luck!B. Not at all.C. Good idea!D. Congratulations!二、完形填空(每小题1 分,共15 分)Lots of junior high school students enjoy sports. My classmates and I had a lot of 11 at our school’s yearly sports meeting last week.It was pretty 12 for me because I took part in the 800-meter race for the first time. 13 I practiced running hard every day, I was still nervous on the day of the meeting.My arms were shaking and my heart was beating 14 when I stood at the starting line. 15 the endless runway (跑道) , I felt like a boat fighting against the wind and rain. I 16 myself that simply joining in was a victory (胜利) itself. I started to calm down (冷静).Just then, the starting gun 17 and all the runners rushed out like tigers running down a hill. By the time I finished the first lap (圈), I had used up almost all my 18 . But I had to keep running for the last 100 meters. I 19 I couldn’t breathe. Looking at the runners in front of me, as they got closer to the finishing line, I really wanted to 20 running and sit down. But I encouraged myself that it must be a victory to keep going and it filled me 21 strength (力量) again. With my remaining strength, I desperately (拼命地) 22 to the end of the finishing line.I 23 in seventh place. This might have been a 24 achievement to other people,。

【最新】人教版英语九年级Unit14单元练习(含答案)

【最新】人教版英语九年级Unit14单元练习(含答案)

【最新】⼈教版英语九年级Unit14单元练习(含答案)最新教学资料·⼈教版英语Unit14 I remember meeting all of you in Grade 7.单元练习⼀、听⼒(听⼒)(共20⼩题;共20分)第⼀节听下⾯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选项。

每段对话读⼀遍。

1. Why wouldn't Mary go to see the doctor?A. Because she doesn't feel ill.B. Because she has to get ready for a test.C. Because she has taken some medicine.2. What's the woman's address?A. 59 Greenfield.B. 59 Road of Greenfield.C. 59 Greyfield Road.3. How did John feel about his holiday?A. Interesting.B. Not very good.C. Very lucky.4. How did Mary come here?A. By car.B. By plane.C. By train.5. What's the time now?A. 6:30.B. 6:50.C. 7:00.第⼆节听下⾯4段对话,每段对话后有⼏个⼩题,从题中所给的A、B、C三个选项中选出最佳选项。

每段对话读两遍。

听第1段对话,回答第6-7⼩题。

6. What events do they have at Dale's school?A. A school trip.B. An Art Festival.C. An English speech contest.7. When is it?A. In April.B. In December.C. In August.听第2段对话,回答第8-10⼩题。

人教版九年级英语 Unit 14单元测试题3套含答案

人教版九年级英语 Unit 14单元测试题3套含答案

Unit14I remember meeting all of you in Grade7.单元测试01第一卷听力部分(15分)Ⅰ.听句子,选择与所听句子相符合的图片(5分)A. B. C.D. E.1.________2.________3.________4.________5.________Ⅱ.听两段较长对话,选择最佳答案(5分)听第一段对话,回答第6~7小题。

6.Where has Jim gone for his holiday?A.To Shanghai.B.To Beijing.C.To Paris.7.Who did David go to Paris with?A.His brother.B.His parents.C.His sister.听第二段对话,回答第8~10小题。

8.How long did Vince skate today?A.About4hours.B.About6hours.C.About5hours.9.When did Vince begin skating?A.At the age of5.B.At the age of6.C.At the age of7.10.Who gave Vince the first pair of skates?A.His father.B.His uncle.C.His grandmother.Ⅲ.听长对话和对话后面的问题,选择最佳答案(5分)11.A.He lost his Chinese book. B.He failed the test. C.His teacher can’t help him.12.A.It’s easy. B.It’s difficult. C.It’s interesting.13.A.Math. B.Chinese. C.Science.14.A.Thursday afternoons. B.Saturday afternoons. C.Sunday afternoons.15.A.At school. B.At Ann’s home. C.At Peter’s home.第二卷笔试部分(85分)Ⅳ.单项选择(10分)16.Many students write to Language Doctor to________advice about learning English.A.look throughB.ask forC.give upD.worry about17.If you want to change the world,you have to________yourself first.A.enjoyB.ask forC.give upD.change18.Who taught you to________in music class?A.play the keyboardB.play keyboardC.play on the keyboardD.play on keyboard19.Read the________carefully before you take the medicine.A.instructionsB.descriptionsC.collectionsD.expressions20.Who are supposed to be responsible________the traffic accident?A.forB.toC.inD.about21.Lily is afraid to speak in public.We should try to help her________shyness.A.developB.improveC.overcomeD.reduce22.We have a lot of things to do.But________we must get some sleep.A.at onceB.at firstC.first ofallD.all in all23.Many kids________volunteers to help others since the terrible earthquake.A.have become;happenedB.have been;happenedC.became;have happenedD.became;happened24.Congratulations________all the winners________your excellent grades!A.to;onB.to;forC.on;onD.on;for25.I think young people should be________knowledge.A.good atB.friendly withC.ready toD.thirsty for V.完形填空(10分)Dear Jenny,How’s it going?Are you busy with your study these days?I’ve been back at school26nearly four weeks.I’m very glad to tell you that great27have takenplace in our school this term.First of all,we’re asked to"clear our plates"when having our meals and say28to wasting.Some of us used to order more than what we could eat.That was a big waste of food.Now we need to29 the food we order.We should also stop wasting in some other ways.For example,we should turn off the lights when we30the classroom.And our school has opened up some fields for us to learn how to grow vegetables.Each class is given a small garden and our class has decided to grow some tomatoes and beans(豆类)in our31time.I think that’ll be very interesting.Maybe I’ll be able to32you some beans we’ve grown by ourselves next time! What’s more,we have only two classes in the afternoon33we have more time for after-school activities.I’m one of the traffic safety volunteers in our school.After school,we take turns to go to the streets near our school and ask people to34the traffic rules.Ithink we are having a different school life now!Please write back soon and tell35more about your school.Yours,Wang Wei26.A.in B.for C.on D.at27.A.changes B.things C.interests D.lessons28.A.yes B.hello C.no D.thanks30.A.leave B.reach C.open D.build31.A.busy B.free C.happy D.sad32.A.plant B.buy C.post D.lend33.A.because B.when C.before D.so34.A.follow B.make C.break D.thinkⅥ.阅读理解(30分)AWe spend hours,days and years of our lives in our school.Imagine(想象)you could design(设计)your dream school,what would it be like?What would you be doing?We wanted to find out what teenagers around the world thought.Here is what they said:Richard from the USA:My dream school would have a big swimming pool and two soccer fields.It would also have a cinema,a gym and a shopping centre.My school has none of these,and I think there should be more pleasant things for students to do while they are studying.Sonic from Italy:I’d like a room where we can relax and play computer games.I’d also like to have a music room.I think there should be a place for everyone to go and relax after class.Wu from Beijing:I think it would be great to have another day off(休息日)every week besides the weekend.If that day was a Friday or a Monday,we would have a long weekend every week.What fun!I also think school should start later,at about10o’clock,and finish earlier.Hannah from Australia:In my dream school,I think the teachers should give us more freedom(自由)and choice about how we study and what we study.I also think it’s not necessary for us to wear school uniforms every day.I really don’t like wearing it.36.There would be________in Richard’s dream school.A.a big swimming pool and a music roomB.a room to relax and play computer gamesC.a big swimming pool and a shopping centre37.How many days off does Wu want to have in a week?A.2B.3C.438.Which country is not mentioned(提到)in the passage?A.Italy.B.Japan.C.Australia.39.From the passage we know that________.A.Sonic from Italy would like a room where she can relax and play computer gamesB.Richard from the USA thinks his dream school should start at10o’clockC.Hannah from Australia likes wearing a school uniform every day40.Which is the best title(标题)for the passage?A.Schools in the pastB.Schools todayC.Dream schoolsBMrs Thompson,a school teacher,told the children on the first day that she loved them all the same.But that was a lie.There in the front row was a little boy named Teddy Stoddard.He didn’t get along well with the other children and he always needed a bath.She did not like him.Then Mrs Thompson got to know that Teddy was a very good boy before the death of his mother.Mrs Thompson was ashamed of herself.She felt even worse when,like all her other students,Teddy bought her a present,too.It was his mother’s perfume(香水)。

人教版九年级英语 Unit 14单元测试题及答案

人教版九年级英语 Unit 14单元测试题及答案

Unit14I remember meeting all of you in Grade7.单元测试02一、听力理解(20小题,每小题1分,共20分)第一节听下面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。

每段对话读两遍。

1.What does the man remember?A.Learning to play the keyboard.B.Learning to play the violin.C.Learning to play the guitar.2.What’s the man’s plan?A.He will join more clubs.B.He will learn to play basketball.C.He will be more hard-working.3.What’s Mr.Wang’s job?A.A Chinese teacher.B.A math teacher.C.A P.E.teacher.4.Who made the speech?A.Linda.B.Peter.C.Henry.15.How has the man changed?A.He doesn’t hate English now.B.He doesn’t like English now.C.He won’t learn English any more.第二节听下面几段对话或独白。

每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳答案。

每段对话或独白读两遍。

听下面一段对话,回答第6至第7两个小题。

6.What does Helen want to be in the future?A.She wants to be a singer.B.She wants to be a reporter.C.She wants to be a dancer.7.What does Andy’s father want him to be?A.An engineer.B.A doctor.C.A manager.听下面一段对话,回答第8至第10三个小题。

人教版九年级物理全一册《第十四章内能的利用》单元练习题-附答案

人教版九年级物理全一册《第十四章内能的利用》单元练习题-附答案

人教版九年级物理全一册《第十四章内能的利用》单元练习题-附答案学校:___________班级:___________姓名:___________考号:___________一、单选题1.瓦特根据水蒸气顶起壶盖的现象,改良了蒸汽机,以下与顶起壶盖过程能量转化方式相同的是()A.B.C.D.2.将一瓶酒精用去三分之一,则剩余酒精的密度、比热容和热值()A.都不变B.都变为原来的三分之二C.热值不变,密度、比热容变为原来的三分之二D.热值变为原来的三分之二,密度、比热容不变3.关于热机,下列说法正确的是()A.热机效率越高,表明热机做的有用功越多B.四冲程汽油机在工作过程中,进气门和排气门同时关闭的冲程是做功冲程和压缩冲程C.柴油机上安装一个笨重的飞轮,是为了提高它的效率D.柴油机的效率比汽油机的高,这是因为柴油的热值比汽油的大4.如图甲为航母上简化的蒸汽弹射装置,能带动舰载机在两秒钟内达到起飞速度,如图乙为汽油机的工作冲程。

下列判断不正确的是()A.舰载机获得的牵引力是因为汽缸内的蒸气体积膨胀,从而推动活塞B.汽缸内的蒸汽推动活塞后,内能增加C.从能量转化角度讲,蒸汽弹射装置工作时与图乙中C所示的原理相似D.从能量转化角度讲,图乙中B冲程是把机械能转化为内能5.端午节有煮粽子的习俗。

对下列煮粽子出现的现象解释正确的是()A.锅盖上方的白雾是水蒸气B.燃料燃烧是内能转化为机械能C.加热粽子是利用做功增加内能D.粽子的香味溢出属于扩散现象6.下面关于热现象的四个图认识正确的是A.甲图烧杯中的水沸时继续吸热,温度保持不变,内能不变B.乙图是两个压紧的铅块能吊起一个重物,两铅块未被拉开是因为铅块分子间只存在引力C.丙图中由于砂石的比热容比海水的比热容小,导致沙漠地区昼夜温差比沿海地区大D.丁图是内燃机的压缩冲程,将机械能转化为内能7.关于内能,有以下四个观点,你认为正确的是()A.汽油机在做功冲程中将机械能转化为内能B.物体温度越低,内能越小,所以0℃的物体没有内能C.沿海地区昼夜温差较小,主要原因是水的比热容较大D.两物体相互接触时,热量总是从内能大的物体转移到内能小的物体8.近年来,我国民用汽油发动机技术取得了长足进步,接近国际先进汽油发动机的水平。

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新人教版九年级第十四单元精选练习题附答案Unit 14 I remember all of you in Grade 7.第一课时Section A(1a~2d)01基础过关Ⅰ. 根据句意及汉语提示填写单词。

1. We are doing a ________(调查) about the most popular sport among the students.2. ________(将要) we meet at the school gate tomorrow?3. Our students achieve very high ________(水平) of musical ability.4. Our teacher is showing us a new ________(方法) of writing.5. Jane's husband is ill and she has to do ________(两倍的) work.Ⅱ.用方框中所给单词的适当形式填空。

see,finish,row,instruct,clear6. I sit in ________ Three. Just behind Nancy.7. Read these ________ carefully before you use the machine.8. We should guide the students ________ the survey report.9. The teacher speaks loudly so that the students can hear her ________.10. Didn't you remember ________ me here last year?Ⅲ. 单项选择。

(选出与句子画线部分意义最相近的一项)( ) 11. (泸州中考)Please remember ________ your notebook here tomorrow.A. bringsB. broughtC. bringingD. to bring( ) 12. (武汉中考)—Will you fix up the machine according to the ________,David?—No problem.A. instructionsB. inventionsC. invitationsD. interviews( ) 13. Miss Wang is always patient ________ me.A. toB. aboutC. withD. in( ) 14. I wonder how they are going to explain for losing three games ________?A. in generalB. all of a suddenC. to our surpriseD. in a row( ) 15. Luke told me to take a break from running.A. have a breakB. take a restC. have a restD. all the aboveⅣ. 根据汉语意思完成句子,每空一词。

16. 他只不过是个孩子,你应该对他耐心点。

He is just a child,so you should ________ ________ ________ him.17. 他们失败之后决定更拼搏,并且投入更多的努力。

They decided to work harder and ________ ________ ________ ________ after their failure.18. 去年她连续四次获胜。

She won four times ________ ________ ________ last year.19. 因为你,我们没有按时完成这项任务。

We didn't finish the task on time ________ ________ you.20. 在日常生活中,我的老师经常帮助我解决困难。

My teacher often helps me ________ ________ difficulties in daily life.02能力提升Ⅴ. 补全对话。

根据对话内容,从方框中选择合适的选项补全对话。

(其中有两项多余)A: Are you going to leave school at the end of the term?B: 21A: What are you going to do?B: I want to find a job. Many jobs are offered in the newspapers.A: 22B: A tour guide. I want to travel around the world.A: That sounds interesting!B: I think so. 23A: I'm going to be a teacher. 24B: I hope your dream will come true.第二课时Section A(3a~3c)01基础过关Ⅰ. 根据句意及汉语或首字母提示填写单词。

1. You have to ________(克服) your shortcomings.2. What a ________(混乱) your room is! Please clean it up.3. Her son g________ from Harvard last year.4. No matter what happens,do remember to keep your c________.5. I'll try to be a loving and c________ person in my life.Ⅱ.用方框中所给单词的适当形式填空。

excite,we,love,care,graduate6. Their school is very beautiful,________ is even more beautiful.7. Helen is a ________ woman and she is always considering others more than herself.8. Luke worked as a manager after ________ from university.9. I'll never forget the ________ of the school art festival.10. Jessica is a ________ girl with two big eyes.Ⅲ. 根据汉语意思完成句子,每空一词。

11. 当我们面对困难时,我们应该沉住气。

We should ________ ________ ________ when we face difficulties.12. 当我回想起那些日子,我禁不住笑了。

When I ________ ________ ________ those days,I couldn't help laughing. 13. 迈克在他妈妈出去的时候把卧室搞得一团糟。

Mike ________ ________ ________ in the bedroom when his mother went out.14. 彼得来自异国他乡。

Peter is ________ ________ ________ ________.15. 我们在准备期末测试。

We're ________ ________ the final exam.02能力提升Ⅳ. 完形填空。

When he was 12 years old,the boy did something he only later realized probably hurt his teacher. He was,after all,a(n) 16 at that time. When he was older and wiser,he wanted to 17 this teacher and say sorry. 18 the teacher seemed to have disappeared.In the past thirteen years,the boy,Larry Israelson,19 turned to the Internet,typing the teacher's name into search boxes. He found 20 .But he never stopped searching. Last month—by now nearly 42 years after the event happened— 21 succeeded.Excited,he started reading a news report I had written in a magazine about a program that helps kids. He studied a photo and found his teacher,who was a volunteer. He then emailed me and asked me to introduce him to the teacher,James Atteberry.I got in touch 22 Atteberry. He agreed to talk to his student. Soon,I received a letter. I immediately sent it to Atteberry.As Atteberry read the 23 ,he was brought back to 1973,when he was a history teacher. In the letter,Larry said,“I am truly 24 for leaving your Seventh Grade class during the 1972—1973 school year. I don't have many memories from school,but at the top of my exercise book you wrote ‘You will go far in life.’25 my school life,I was proud to be your student.”When it comes to apologies,no one gets a pass. Everyone needs to receive one,and everyone needs to give one.( ) 16. A. kid B. teacher C. old man D. famous person( ) 17. A. refuse B. believe C. find D. leave( ) 18. A. Since B. But C. Because D. So( ) 19. A. never B. hardly C. seldom D. often( ) 20. A. everything B. something C. nothing D. anything( ) 21. A. you B. they C. she D. he( ) 22. A. for B. with C. about D. to( ) 23. A. report B. story C. book D. letter( ) 24. A. sorry B. happy C. proud D. excited( ) 25. A. Looking forward to B. Looking back atC. Talking back toD. Catching up with第三课时Section A(4a~4b)01基础过关Ⅰ. 根据句意及首字母或汉语提示填写单词。

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