新人教版九年级第十二单元精选练习题附答案
Unit 12 Life is full of the unexpected.
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. The ________(背包) is too big for me. Please show me another one.
2. The bell is ________(响).Let's begin our class.
3. I have ________(完成) my homework. Let's play football now.
4. Mike ________(睡过头) this morning and went to school late.
5. Jane often helps her mother ________(洗) clothes on weekends.
Ⅱ. 用括号内所给单词的适当形式填空。
6. Everyone thinks the new TV play's ending is ________(expected).
7. The boy kept ________(watch) TV the whole afternoon.
8. We were late for the film Roman Holiday，but ________(luck) we didn't miss much.
9. Linda，there is only a little time left. We have to walk ________(quick).
10. Tom always ________(brush) his teeth once a day.
Ⅲ. 单项选择。
( ) 11. I must get up early tomorrow morning. Please wake me ________.
A. out
B. off
C. down
D. up
( ) 12. My aunt drove by and gave me a ________ on the way home.
A. walk
B. lift
C. way
D. idea
( ) 13. —Why were you late for school this morning?
—Because my alarm clock didn't go off and I ________.
A. overslept
B. completed
C. changed
D. missed
( ) 14. —What's wrong with you?
—By the time I got to school，I realized I had ________ my English book at home.
A. left
B. forgotten
C. took
D. brought
( ) 15. She said when she got to the cinema，the film ________ for 5 minutes.
A. has begun
B. had begun
C. has been on
D. had been on
Ⅳ.根据汉语意思完成句子，每空一词。
16. 当地震发生的时候，一些人仓促地跑出了大楼。
Some people ________ ________ ________ the building when the earthquake
happened.
17. 我开车送你去车站吧。
Let me ________ ________ ________ ________ to the station.
18. 当他走进教室时，他才意识到他没带书包。
When he came into the classroom，he ________ that he ________ ________ his backpack.
19. 我到车站时，火车已经开走了。
________ ________ ________ I got to the station，the train ________ ________.
20. 我起床晚了，因为我的闹钟没有响。
I got up late because my alarm clock ________ ________ ________.
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: Hi, John. 21
B: It was terrible. One of my friends invited me to a costume party.
A: 22 Why do you say it was terrible?
B: By the time I got to the party, I realized I had been fooled, because I was the only one that was wearing a costume.
A: Oh, I see. That was really terrible.
B: 23
A: I was tired on April Fool's Day.
B: 24
A: My friends told me that we were going to have a math test the next day. I studied the whole night and was exhausted(精疲力竭的).
B: 25
A: Then the next day I found they had fooled me. We didn't have a test.
21.________22.________23.________24.________25.________
第二课时Section A(3a～3c)
01基础过关
Ⅰ. 根据句意及首字母提示填写单词。
1. As we know, paper b________ easily.
2. The moon was a________ the trees in the east.
3. People do not know the value of health t________ they lose it.
4. The sun rises in the east and sets in the w________.
5. If you travel by air，you must arrive at the a________ very early.
Ⅱ. 用括号内所给单词的适当形式填空。
6. These ________(work) are building a new bridge in the city.
7. We can see the ________(burn) building through the window.
8. The wounded fish is swimming in the river. It is still ________(live).
9. Walk about two ________(block) and you can see the bookstore on your left.
10. Don't ________(stare) at her like that!
Ⅲ. 根据汉语意思完成句子，每空一词。
11. 当电话铃响的时候，我准备去睡觉。
I ________ ________ ________ go to bed when the phone rang.
12. 你没有与其他人排在一排。
You are not ________ ________ ________ the others.
13. 有时候坏事能够变成好事。
Sometimes a bad thing can ________ ________ ________ a good one.
14. 他以怀疑的眼光上下打量我。
He looked me up and down ________ ________.
15. 这架飞机10分钟后起飞。
The plane will ________ ________ in ten minutes.
02能力提升
Ⅳ. 完形填空。
Yesterday was my friend Sally's birthday. She had 16 me to her birthday party. And another friend Eric had offered to take me to the party by car.
17 I was getting dressed，Eric rang and said he was ill and couldn't go to Sally's party. I decided to go there alone by train. Unluckily，while I was talking 18 the phone，the cat walked over my clean shirt，so I had to spend a few minutes 19 another one.
As I was walking to the train station it started to snow and I felt very cold. I just 20 a train so I had to wait for another one. When the train finally arrived, I was frozen! I was so cold and tired that I 21 on the train and missed my station.
I got off at the next stop and decided to walk 22 to Sally's house. I walked for half an hour and then I realized I was 23 .Luckily，I found a public phone and telephoned for a taxi. When I finally arrived at Sally's house，it was 24 midnight and people were going home. What a(n) 25 day!
( ) 16. A. let B. showed C. suggested D. invited
( ) 17. A. Then B. When C. Though D. Since
( ) 18. A. on B. at C. to D. about
( ) 19. A. look B. looking C. finding D. to find
( ) 20. A. got off B. caught C. got on D. missed
( ) 21. A. enjoyed myself B. fell asleep C. played cards D. looked out ( ) 22. A. up B. forward C. back D. along
( ) 23. A. tired B. hungry C. sad D. lost
( ) 24. A. even B. nearly C. still D. hardly
( ) 25. A. lovely B. exciting C. terrible D. interesting
第三课时Section A(4a～4c)
01基础过关
Ⅰ.根据句意及首字母或汉语提示填写单词。
1. I will go to the m________ to buy some food with my mother this afternoon.
2. Do you have to wear uniforms on w________？
3. We need four apples to make apple ________(果馅饼).
4. I prefer bread with ________(奶油)in it.
5. Cocoa ________(豆)is used to make some kinds of drink.
Ⅱ. 单项选择。
( ) 6. We waited for Mrs. Li for nearly two hours until she ________ in the end.
A. gave up
B. put up
C. showed up
D. looked up
( ) 7. Tom found that the train ________ when he ________ at the station.
A. left; had arrived
B. left; arrived
C. had left; had arrived
D. had left; arrived
( ) 8. —Mom，I am hungry.
—Here is a ________ for you. Why not help yourself to it?
A. spoon
B. pie
C. bowl
D. lesson
( ) 9. (山西中考)How I wish I could sleep longer! However，I had to get up as soon as the alarm clock ________.
A. ran off
B. went off
C. took off
D. set off
( ) 10. We had finished all the new lessons ________ last month.
A. after
B. by the time
C. by the end of
D. as soon as
02能力提升
Ⅲ. 按要求完成句子，每空一词。
11. By the time you arrived，they had finished the project.(对画线部分提问)
________ ________ they done by the time you arrived?
12. I was going to leave when the phone rang.(改为同义句)
I ________ ________ ________ leave when the phone rang.
13. Mike had learned five Chinese songs by the end of the term.(改为否定句)
Mike ________ ________ learned five Chinese songs by the end of the term.
14. He had lived in the town for six years before I moved here.(对画线部分提问)
________ ________ ________ he lived in the town before you moved here?
15. The plane took off. I reached the airport.(用when合并为一句)
The plane ________ ________ ________ when I ________ the airport.
Ⅳ. 任务型阅读。
Molly had a bad day today. This morning，when she got out of bed，she stepped on her favorite doll and broke its head off. When she went to brush her teeth，she dropped her toothbrush(牙刷).
At breakfast，Molly dropped her breakfast plate on the floor. One of her pancakes even flew up to the ceiling and didn't fall back down!
After breakfast，Molly looked at her watch and found she was already late. She usually takes the school bus to school，but today she missed it and had to take a taxi to school.
When Molly arrived at school，she found she had forgotten to bring her math homework. And in the P.E.class，she tripped(绊倒) and her knee(膝盖) was hurt badly.
“I had a bad day，”Molly cried，throwing herself on her bed after she came home.
“What's the matter，Molly？”her mom asked. Then Molly told her mom about what had happened in the day.
“I know what will make you happy. Come with me，”her mom said. They walked down the street to the park. Mom pushed Molly on the swings.
“It's fun，”Molly laughed. Swinging is always her favorite thing.
“This is for you，”her mom said and handed Molly a pretty red flower.“Do you feel better now？”
根据短文内容，回答下列问题。
16. What happened to Molly's favorite doll?
________________________________________________________________________ 17. What did Molly have for breakfast?
______________________________________________________________________ 18. How does Molly usually go to school?
_______________________________________________________________________ 19. What did Molly hurt in the P.E. class?
________________________________________________________________________ 20. What did Molly's mother do to make her fell better?
______________________________________________________________________
第四课时Section B(1a～1e)
01基础过关
Ⅰ.用方框中所给单词的适当形式填空。
invite，embarrassed，fool，costume，happen
1. I felt like a ________ when I realized my mistake.
2. Mary wears a beautiful ________ at the party.
3. Last Sunday my friend ________ me to her birthday party.
4. Let's go and see what is ________ over there.
5. I was very ________ at the party because I wore the wrong clothes.
Ⅱ. 用括号内所给动词的适当形式填空。
6. We had ________(paint) the house before we ________(move) in.
7. Tom said he ________(read) the book twice.
8. Most of my good friends ________(leave) when I ________(arrive) at the party.
9. By the time I ________(walk) into the store，someone ________(buy) the jeans I wanted.
10. My mother ________(come) back from the market when I ________(get) up.
Ⅲ. 根据汉语提示完成句子，每空一词。
11. I left for the train station when my alarm clock ________ ________(发出响声).
12. Don't ________ ________(熬夜) too late. Or you will feel tired in class.
13. Mike didn't ________ ________(露面) until 2:00 in the afternoon.
14. The ________ ________(化妆舞会) was exciting. Everyone had a lot of fun.
15. After Jack ________ ________(穿好衣服)，he went out with a camera.
Ⅳ. 单项选择。
( ) 16. I have refused such a good job. I'm really a(n) ________.
A. artist
B. farmer
C. fool
D. actor
( ) 17. Molly didn't wake up even though her alarm clock ________.
A. ran off
B. went off C .took off D. turned off
( ) 18. Cindy invited me ________ to her house for dinner this weekend.
A. to going
B. went
C. to go
D. go
( ) 19. It was such an ________ joke that everyone felt really ________.
A. embarrassing; embarrassed
B. embarrassed; embarrassing
C. embarrassed; embarrassed
D. embarrassing; embarrassing
( ) 20. —Did you see Tom at the airport?
—No. His plane______ by the time I ______ there.
A. has taken off；got
B. took off；had got
C. took off；got
D. had taken off；got
02能力提升
Ⅴ. 补全对话。
根据对话情景，在每个空白处填上一个恰当的句子，使对话完整、连贯。
A: Hi，Lisa！Have you ever been late for school?
B: Yes，I have. But only once last term.
A: 21 ？
B: I stayed up watching the football match the evening before，so I overslept the next morning.
A: 22 ？
B: I rushed to the bus stop without breakfast. But unfortunately，by the time I got there，the school bus had already left.
A: Poor guy！23 ？
B: I started walking. Luckily，my uncle drove by and gave me a ride，but I was still late. A: 24 ？
B: He said I shouldn't stay up so late at night.
A: Yes. He is right. 25 .
B: That's true. I'll go to bed before ten from now on.
21. _______________________________________________________________________
22. ________________________________________________________________________
23. ________________________________________________________________________
24.________________________________________________________________________
25.________________________________________________________________________
第五课时Section B(2a～2e)
01基础过关
Ⅰ.根据句意及首字母提示填写单词。
1. They have c________ the sports meet because of the storm.
2. The young l________ bought a red handbag in the shop just now.
3. Pu Cunxin，a famous actor，acted an o________ in the army.
4. Finally these animals d________ because people cut down lots of trees.
5. Although it was a h________，many people，especially young people，treated it seriously.Ⅱ. 用方框中所给单词的适当形式填空。
believe，discover，embarrassed，end，announce
6. Sarah had an ________ experience last weekend.
7. The TV play has a perfect ________.
8. Few people realized the ________ was important.
9. Mr. Zhang ________ to his class that there would be no school tomorrow.
10. Bob is kind and friendly to everyone. He is ________.
Ⅲ.单项选择。
( ) 11. —Will you take part in the football game on Sunday afternoon?
—Yes，but it has been ________because of the rain.
A . refused B. controlled C. cancelled D. served
( ) 12. Emily's new books are very popular. They were ________in an hour.
A. sold out
B. showed up
C. put off
D. took out
( ) 13. (雅安中考)He ________ for ten years.
A. has been married
B. married
C. got married
D. had married
( ) 14. —Why didn't you give the wallet to the man at once?
—Because he ________before I realized it was his.
A. had been disappeared
B. has disappeared
C. had disappeared
D. has been disappeared
( ) 15. I decided to play a joke ________my sister ________April Fool's Day.
A. at；at
B. on；on
C. at；on
D. on；at
Ⅳ. 根据汉语意思完成句子，每空一词。
16. 在这些书卖完之前，你应该买一本。
You should buy one of the books before they are ________ ________.
17. 我们打算出去，但是最终在家看英语录像片。
We were going out，but ________ ________ watching English－language videos at home.
18. 你的叔叔是什么时候结婚的？
When did your uncle ________ ________？
19. 我不相信这种药能帮助我们减肥。
I don't believe this kind of medicine can help us ________ ________.
20. 去年我的故乡发生了很大的变化。
Great changes ________ ________ in my hometown last year.
02能力提升
Ⅴ. 短文填词。
用方框中所给单词的适当形式填空，使短文意思完整、通顺。
burn，above，pie，stare，enjoy，same，actually，disappear，classmate，before Charlotte Kelly shares how she celebrated Father's Day with her father，astronaut Scott Kelly:
I am on the summer break from school right now.21.________ school ended，my dad set up a video conference(视频会议) with my class. All of the kids really 22.________ seeing him and asking him questions about space. I couldn't help laughing when I saw him eat a piece of floating(漂浮的) strawberry 23.________.Two days ago，my mom and I went to a party with my 24.________ Holly and her family. Just around 9:10 pm，we were all able to 25.________ at the night sky and see the International Space Station(国际空间站) fly over. It looked like a 26.________ star just moving across the sky. Then it 27.________ after four minutes.
Today is Father's Day. My sister and I were able to do a video conference with our dad at the 28.________ time. She was in Houston，I was in Virginia Beach and my dad was flying over us! Really! He was 29.________ flying over us. He put his video monitor(视频监视
器)in his window and took a picture of Virginia Beach from 30.________.How wonderful!
Self Check
Ⅰ. 单项选择。
( ) 1. Something special happened ________ Mary ________ the first day of school.
A. at；on
B. to；on
C. with；in
D. about；in
( ) 2. Mr. Black ________his keys in the office，so he had to wait until his wife ________ home.
A. has left；comes
B. left；had come
C. had left；came
D. had left；would come
( ) 3. —Lily told me I failed the math exam.
—Oh，don't believe her. It must be a(n) ________.We all know you do well in math.
A. accident
B. hoax
C. panic
D. result
( ) 4. The dentist didn't ________until it was nine o'clock in the evening.
A. show up
B. show off
C. show around
D. show to
( ) 5. (莱芜中考)If you read a lot，your life will be full ________ pleasure.
A. by
B. of
C. for
D. with
( ) 6. All the tickets ________ by the time I got to the cinema.
A. sell out
B. sold out
C. have been sold out
D. had been sold out
( ) 7. (襄阳中考)—Show me your homework，Dave.
—Sorry，Mrs. Brown. I've ________ it at home.
A. missed
B. forgotten
C. lost
D. left
( ) 8. —You ________，didn't you?
—Yes, I did. When I woke up，it was already 11 o'clock.
A. overslept
B. failed
C. won
D. refused
( ) 9. Don't ________ him. After all，he is a child.
A. lift
B. fool
C. know
D. burn
( ) 10. There is a big ________in the town. We can buy different kinds of things in it.
A. market
B. teammate
C. discovery
D. speech
Ⅱ. 完形填空。
I love working in the music business. The first thing I do every day is to check my e－
mail messages. My fans write e-mails to me. I like 11 what they write to me and replying to them. After that I leave my house and go to a French restaurant for breakfast. London is a very busy city and I enjoy 12 with a cup of coffee. I usually have only one pizza with my coffee because I never feel 13 in the morning.
At about eleven，the car for me 14 and takes me to the studio(工作室).I meet the other 15 of our band and then we talk about the ideas we have for that day. We never start working in the studio 16 about noon. At about 3:00 pm，we stop for lunch but we
17 continue recording if we have some good ideas.
Because I am the singer of the band，I must be 18 with my voice. I never sing if I feel tired. And I drink a lot of water during the day. For the last 19 ，I don't sing but help the rest of the band with the music. I go back home by 20 too and arrive home at about 6:30.
( ) 11. A. sharing B. remembering C. reading D. forgetting
( ) 12. A. playing B. relaxing C. working D. staying
( ) 13. A. hungry B. bored C. tired D. sad
( ) 14. A. remains B. shines C. disappears D. arrives
( ) 15. A. courses B. guards C. members D. songs
( ) 16. A. beside B. at C. until D. after
( ) 17. A. never B. sometimes C. always D. hardly
( ) 18. A. careful B. familiar C. busy D. angry
( ) 19. A. roads B. classes C. parts D. hours
( ) 20. A. train B. bus C. car D. bike
单元写作小专题&Section B(3a～3b)
【单元写作目标】
能用过去完成时态叙述过去发生的事情。
1.能用过去完成时“had done sth.”叙述某一时刻为止已经完成的活动；
2.能正确应用“by，before，when”等引导的过去时间状语；
3.能正确使用“when，later，then，after that，finally”等连词叙述事情发生的过程；
4.写作微技能:按时间顺序叙述事件发生的过程。
一、语言积累
(一)根据下列表格中所给的单词，写出相应的动词原形或过去分词。
例: Tom fell asleep.
Tom's father came back home.
By the time/When Tom's father came back home，Tom had fallen asleep.
1. My parents left home to work.
I woke up.
________________________________________________________________________ 2. The library was closed.
Mary got to the city library.
________________________________________________________________________ 3. His friends waited for him for a long time.
Mr. Lin arrived at the park.
________________________________________________________________________
4. I realized that I didn't write my name on it.
I handed in my paper.
________________________________________________________________________ 5. The movie was on for 20 minutes.
The boy reached the cinema.
________________________________________________________________________ 6. Peter received many gifts.
His birthday came.
________________________________________________________________________
(三) 根据汉语意思完成句子，每空一词。
1. 生活中充满了意外。
Life ________ ________ ________ the unexpected.
2. 刚才我正要去买东西，他给我打电话来了。
I ________ ________ ________ do some shopping when he telephoned me just now.
3. 我们疑惑地盯着从燃烧的大楼里升出来的烟。
We ________ ________ ________ ________ the black smoke rising ________ the
burning building.
4. 我从床上跳起来并直奔机场。
I ________ ________ ________ the bed and ________ ________ to the airport.
5. 早上当我去学校的时候，我发现我忘记穿校服了。
________ ________ ________ I ________ ________ school in the morning，I found I had forgotten to put on my school uniform.
6. 然而，全世界最有名的恶作剧，是发生在十月而不是四月。
One of the world's ________ ________ tricks，however，happened in October ________ ________ in April.
7. 韦尔斯让它听起来如此逼真，以至于成百上千的人都相信了这个故事。因此，全国
上下一片恐慌。
Welles made it sound ________ real ________ hundreds of people believed the story，and fear ________ across the whole country.
二、篇章训练
同学们，还记得曾经令你觉得尴尬、倒霉、沮丧的一天吗？请你以“What a(n)
________ Day”为题，写一篇120词左右的短文，叙述这段经历及当时的感受。
提示:
1. When did it happen?
2. What happened first?
3. What happened next?
4. How did the day end?
5. How did you feel about this day?
第一课时Section A(1a～2d)
Ⅰ.1.backpack 2.ringing 3.finished 4.overslept 5.wash
Ⅱ.6.unexpected7.watching8.luckily9.quickly10.brushes
Ⅲ.11-15DBAAD
Ⅳ.16.rushed out of17.give you a lift18.realized；had forgotten 19．By the time；had left20.didn't go off
Ⅴ.21-25GCFAD
第二课时Section A(3a～3c)
Ⅰ.1.burns 2.bove 3.till 4.west 5.airport
Ⅱ.6.workers7.burning8.alive9.blocks10.stare
Ⅲ.11.was about to12.in line with13.be turned into14.in disbelief 15．take off
Ⅳ.16-20DBACD21-25BCDBC
第三课时Section A(4a～4c)
Ⅰ.1.market 2.workdays 3.pies 4.cream 5.bean
Ⅱ.6-10CDBBC
Ⅲ.11.What had12.was about to13.had not14.How long had
15．had taken off; reached
Ⅳ.16.It got broken.17.Pancakes.18.By school bus.19.Her knee.20.She pushed her on the swings and gave her a pretty red flower.
第四课时Section B(1a～1e)
Ⅰ. 1.fool 2.costume 3.invited 4.happening 5. embarrassed
Ⅱ. 6.painted；moved7. had read8.had left; arrived9. walked; had bought
10. had come; got
Ⅲ. 11.went off12.stay up13.show up14.costume party15. got dressed
Ⅳ. 16－20CBCAD
Ⅴ. 21.Why were you late22.What did you do after you get up
23. How did you go to school then24.What did your teacher say
25. You should go to bed early at night
第五课时Section B(2a～2e)
Ⅰ.1.canceled https://www.doczj.com/doc/1e3908060.html,dy 3.officer 4.disappeared 5.hoax
Ⅱ.6.embarrassing7.ending8.discovery9.announced 10.believable
Ⅲ.11-15CAACB
Ⅳ.16.sold out17.ended up18.get married19.lose weight
20. took place
Ⅴ.21.Before22.enjoyed23.pie24.classmate25.stare
26.burning27.disappeared28.same29.actually30.above
Self Check
Ⅰ.1-5BCBAB6-10DDABA
Ⅱ.11-15CBADC16-20CBADC
单元写作小专题&Section B(3a～3b)
一、语言积累
(一) run；lost；got；told；wake；stopped；rushed；made；sell；
found；left；shown；stayed；take；go；ring；put；hit；fallen；
written；come
(二) 1.By the time/When I woke up，my parents had left home to work.
2．By the time/When Mary got to the city library，it had been closed.
3．By the time/When Mr. Lin arrived at the park，his friends had waited for him for a long time.
4．By the time/When I handed in my paper, I realized that I hadn't written my name on it.
5．By the time/When the boy reached the cinema，the movie had been on for 20 minutes.
6．Before Peter's birthday came，he had received many gifts.
(三)1.is full of 2.was about to 3.stared in disbelief at；above
4．jumped out of；went straight 5.By the time；left for
6．most famous；rather than7.so；that；spread
二、篇章训练
One possible version：
What an Unforgettable Day
Last summer vacation I decided to visit my grandparents because
I haven't seen them for many years.
That day when I was about to leave for the bus station, I found I had left my ID card and mobile phone on the bed. After I got to the bus station, I found I had arrived the station two hours later. While I was waiting in the waiting room, a woman came and asked me if I could help her look after her two boys for a while. I agreed and we played games until the woman came back. After they left, I found my wallet had been stolen. I called the police right away. They told me that the woman had cheated me. That made me really disappointed and worried. Finally, I got to my grandparents' home with the help of the police.
It's a lesson to me. But I think we still should keep a kind heart, although the society isn't good enough.
第九单元测试题 一、我会选 1.溶液一定是（） A.单质 B.化合物 C.纯净物 D.混合物 2.生活中常见的下列物质，不属于溶液的是（） A.糖水 B.蒸馏水 C.碘酒 D.汽水 3.一瓶NaCl溶液里各部分的性质（） A.上面跟下面不相同 B.完全不相同 C.有的相同，有的不相同 D.完全相同 4.下列关于溶液的说法正确的是（） A.溶液都是无色的 B.溶液一定是混合物 C.稀溶液一定是不饱和溶液 D.均一、稳定的液体一定是溶液 5.在一瓶NaCl饱和溶液中，当温度不变时，加入少量NaCl晶体，则（） A.溶液的质量增大 B.晶体的质量不变 C.晶体的质量增大 D.晶体溶解一部分 6.对于多数固体溶质的不饱和溶液，要使之成为饱和溶液，可采用的方法有（） ①降低温度；②升高温度；③加同种溶质；④加溶剂；⑤恒温蒸发溶剂 A.①③⑤ B.②③④ C.①②③ D.②③⑤ 7.实验室现有足量的20%的NaOH溶液和蒸馏水，欲配制10%的NaOH溶液100 g，需要20%的NaOH溶液（） A.95 g B.10 g C.50 g D.100 g 8.日晒海水可以得到食盐固体，其原因是（） A.受热时食盐的溶解度降低 B.受热时食盐的溶解度显著增大 C.受热时海水中的水分蒸发 D.受热时海水发生分解 9.配制一定溶质质量分数的氯化钠溶液的一些操作步骤见下图，正确的操作顺序是（） A.④⑤①②③ B.①②③④⑤ C.③④①②⑤ D.②①④③⑤ 10.一杯10 ℃的硝酸钾溶液，能证明它是饱和溶液的方法是（） A.蒸发5 g水有固体溶质析出 B.加入少许硝酸钾晶体不溶 C.把溶液降温至0 ℃有固体溶质析出 D.上述三种方法都行 11.把100 mL 10%的氯化钠溶液稀释50倍，稀释后溶液中的溶质质量（） A.减少50倍 B.增加50倍 C.不变 D.减少5倍 12.20 ℃时，向100 g质量分数为 26.5%的饱和氯化钠溶液中加入 3.5 g氯化钠，此时溶液中溶质的质量分数为（） A.26.5% B.30% C.25% D. 13.在粗盐提纯的实验中，若过滤后滤液浑浊，下列可能的原因中不正确的是（） A.滤纸破了 B.漏斗下端没有紧靠烧杯内壁 C.液面高于滤纸边缘 D.承接滤液的烧杯没洗干净 14.将m g硫酸钾的不饱和溶液恒温蒸发水分至有晶体析出，在此变化过程中溶液里溶质质量分数p%与时间t的关系正确的是（） A B C D
部编九上第二单元知识总结 一、字音字形 第六课《敬业与乐业》 禅师[chán shī] 解剖（jiě pōu）流露[liú lù] 亵渎[ xiè dú ] 旁骛[ páng wù ] 佝偻[ gōu lóu ] 承蜩[ chéng tiáo ] 骈进[ pián jìn ] 强聒不舍[ qiǎng guō bù shě ] 教诲[ jiào huì ] 蛀（zhù）赦（ shè） 精微[ jīng wēi ] 秘诀[ mì jué ] 羡慕[ xiàn mù ] 浪荡[ làng dàng ] 妄想[ wàng xiǎng ] 杜绝[ dù jué ] 调和[ tiáo hé ] 断章取义[ duàn zhāng qǔ yì ] 不二法门[ bùèr fǎ mén ] 言不及义[ yán bù jí yì ] 第七课《就英法联军远征中国致巴特勒上尉的信》 赃物[ zāng wù ] 眼花缭乱[ yǎn huā liáo luàn ] 惊骇[ jīng hài ] 箱箧[ xiāng qiè ] 绸缎[ chóu duàn ] 制裁[ zhì cái ] 瞥见[ piē jiàn ] 谴责[ qiǎn zé ] 晨曦[ chén xī ] 琉璃[ liú li ] 恍若[ huǎng ruò ] 珐琅[ fà láng ] 洗劫[ xǐ jié ] 予以[ yǔ yǐ ] 剪影[ jiǎn yǐng ] 荡然无存[ dàng rán wú cún ] 富丽堂皇[ fù lì táng huáng ] 丰功伟绩[ fēng gōng wěi jì ] 赞誉[ zàn yù ] 典范[ diǎn fàn ] 缀满[ zhuì mǎn ] 朱鹭[ zhū lù ] [ dàng rán wú cún ] 不可名状[ bù kě míng zhuàng ] 第八课《论教养》 贸然[ mào rán ] 疲惫不堪[ pí bèi bù kān ] 彬彬有礼[ bīn bīn yǒu lǐ ] 大发雷霆[ dà fā léi tíng ] 漠不关心[ mò bù guān xīn ] 随心所欲[ suí xīn suǒ yù ] 一意孤行[ yī yì gū xíng ] 涵养[ hán yǎng ] 自吹自擂[ zì chuī zì léi ] 恪守[ kè shǒu ] 自持[ zì chí ] 遵循[ zūn xún ] 汲取[ jí qǔ ] 矫揉造作[ jiǎo róu zào zuò ] 附庸风雅[ fù yōng fēng yǎ ] 扭捏作态[ niǔ niē zuò tài ] 箴言[zhēn yán] 尴尬[ gān gà ] 允诺[ yǔn nuò ] 妨碍[ fáng ài ] 愚蠢[ yú chǔn ] 絮絮叨叨[ xù xù dāo dāo ] 积淀[ jī diàn ] 谚语[ yàn yǔ ]
部编版九年级下册第二单元检测题 一、积累与运用（30分） 1. 下列词语中加点字的读音全都正确的一项是（） A．咸亨．（hēng）羼．水（chàn）颓．唐（túi）蓬蒿．（hāo） B．舀．出（yǎo）拭擦．（shì）蘸．酒（zhàn）戏谑．（xuè） C．哄．笑（hǒng）蒲．包（pú）笔砚．（yàn）剜．肉（wǎn） D．不屑．（xiè）阔绰．（chuò）门槛．（kǎi）荣膺．（yīng） 2.下列字形完全正确的一项是( ) A. 低眉顺眼自言自语引人注目挈而不舍 B. 微不足道自命不凡家喻户晓全身贯注 C. 大庭广众锐不可当锋芒毕露迥乎不同 D. 若有所失人声顶沸洁然不同空前绝后 3.下列词语解释有误的一项是（） A．如坐针毡：形容心神不宁。腻歪：厌恶，厌烦。 B．望眼欲穿：一眼就能看到底。荣膺：光荣地获得。膺，胸。 C．妙手回春：称赞医生医术高明，一下子就能把垂危的病人治好。窝汗：指汗蒸发不出来。 D．影影绰绰：模模糊糊，不真切。戏谑：用有趣的、引人发笑的话开玩笑。 4.下列句子中没有语病的一项是（） A.投资环境的好坏，服务质量的优劣，市民文明素质的高低，都是铜仁经济能否健康发展的重要保证。 B.文艺界的同志对这一节目表示了极大的关心和浓厚的兴趣。 C.威海海防纪念馆分序厅、抗倭、抗英、抗法、抗日、尾厅等六部分组成，充分显示了中华儿女自强不息的民族精神。 D.通过社会实践活动，让我们接触了社会，开阔了视野。 5. 下列句子中成语使用正确的一项是（） A. 近年来，我国各地纷纷成立了野生动物救助中心，一些遭到伤害的野生动物又栩栩如生了。 B. 如果能掌握科学的学习方法，就会受到事倍功半的效果。 C. 目前，水资源紧缺的状况正以锐不可当之势影响着我们的生活，理应引起高度重视。 D. 任何个人的成绩和人民群众的伟大创造比起来，都不过是沧海一粟。
九年级英语单元检测（Unit 2) 一、选择与划线部分意思相同或相近的选项。（5分） （ A ）1. In the end，he got the full mark in the math exam. A. At last B. At the end C. At first （ B ）2. He made a decision to leave his family. A. decide B. decided C. decides （ A ）3. We are proud of our strong country. A. take pride in B. take pride C. are pride of （ C ）4. She used to be afraid of the dark.. A. be afraid to B. be terrified C. be terrified of （ B ）5. Wang ping is no longer a child. A. not…any more B. not…any longer C. not more 二、选择填空，从各题的三个选项中选出一个最佳答案。（共25分，每小题1分） （ B ）6. They enjoyed _____ piano. A. play B. playing the C. playing （ A ）7. _____ you _____ to go to the park when they were children? A. Did, use B. Did, used C. Do, use （ B ）8. Mary _____ six dollars for the pen. A. spent B. paid C. cost （ B ）9. I’m _____ in the _____ fil m. A. interested, interested B. interested, interesting C. interesting, interested （ A ）10. --- _______________________? --- She is medium height. A. What’s she like? B. How is she? C. What does she like? （ B ）11. He _____ has time for concerts, does he? A. hard B. hardly C. already （ C ）12. My life _____ a lot in the last few years. A. change B. changed C. has changed （ A ）13. I will eat ice, meat _____ noodles.
人教版九年级化学下册第九单元溶液知识点总结 课题一溶液的形成 知识点一溶液 定义：一种或几种物质分散到另一种物质里,形成均一的、稳定的混合物,叫做溶液。 基本特征：均一性——指溶液中各部分的浓度和性质都相同。 稳定性——外界条件不变（温度、压强不改变,溶剂不蒸发）时, 溶质、溶剂不分层,也不会析出固体。 溶液的命名：[溶质]的[溶剂]溶液。如果没有指明溶剂,我们就认为水是溶剂。 【拓展延伸】1.判断某物质是否是溶液,一般看以下两点: (1)是否是均一、稳定的混合物;(2)一种物质是否溶解于另一种物质中。 2.有些物质(如蔗糖等)在溶液中是以分子的形式存在,还有些物质(如氯化钠 等)在溶液中是以离子的形式存在。 【易错警示】 1.溶液一般是澄清、透明的,但不一定是无色的。如CuSO4溶液为蓝色,氯化亚铁溶 液为浅绿色,高锰酸钾溶液为紫红色。 2.溶液是混合物,因此均一、稳定的液体不一定是溶液,如水是均一、稳定的液体,但 不是溶液。 知识点二溶液的组成 溶液由两部分组成——溶剂和溶质。 溶剂的定义：能溶解其他物质的物质叫做溶剂。常见的溶剂有水、酒精、汽油。 溶质的定义：被溶解的物质叫做溶质。 注意区分溶剂和溶质： ①固体（或气体）与液体混合——固体（或气体）是溶质,液体是溶剂。 ②液体和液体混合——一般把量多的看作溶剂,量少的看作溶质。 如果其中一种液体是水,那么水是溶剂。 【拓展延伸】1.在溶液中,溶质可以是一种,也可以是两种或两种以上,但溶剂只能是一种。溶质和溶剂可以是固体、液体或气体。 2.对于发生化学反应后所得溶液中溶质的判断,应以反应后生成的物质和反 应物的量来确定。如锌与稀硫酸恰好完全反应后所得溶液中溶质应该为反应生成的ZnSO4 【易错警示】 1.溶液的质量等于溶液中所含溶质的质量和溶剂的质量之和, 但溶液的体积不等于溶质体积与溶剂体积之和。 2.在计算溶液质量时,溶质质量是指已被溶解的那部分的物质的质量,而未溶解的部分不 能计算在内。 【实验9-2】实验现象:碘几乎不溶于水,却可以溶于汽油形成紫色溶液; 高锰酸钾几乎不溶于汽油,却可以溶于水形成紫红色溶液。 实验结论:物质的溶解能力与溶质、溶剂本身的性质有关,同种物质在不同溶剂 里的溶解能力不同,不同物质在同一溶剂里的溶解能力不同。 知识点三乳浊液和乳化现象
人教版九年级英语上册第二单元 学习目标 1.掌握描写人物的技巧和词汇。 2.掌握下列知识点： ■重点词汇：sure, used，airplane, terrify on ■重点短语：①used to②wait a minute③play the piano④be interested in⑤on the swim team ①be terrified of②go to sleep③be alone④be afraid of ■重点句型： ①Mario，you used to be sh ort, didn’t you? ②Don't you remember me? ③I go to sleep with my bedroom 1ight on. ■语法：used to句式的用法 预习导学 Ⅰ.英汉短语互译。 1.过去经常 2.on the swim team 3.弹钢琴 4.wait a minute 5.对……感兴趣 Ⅱ.预习Section A（1a-2c）部分，完成下列句子。 6.I（过去）be short，but now I am tall. 7.My sister used to（害怕）the dark. 8.He used to be quiet，（是吗）? 合作研讨 一、重点单词与短语 1.sure adv.的确 【拓展】（1）be sure一定要；务必 （2）make sure弄清楚；确保 【跟踪训练】 （1）人的确在变化。 People change. 2.play the piano弹钢琴 【精解】play与乐器类名词连用时，名词前要加定冠词the,而与球类名词连用时，名词前不要加定冠词the。 例如：play the violin拉小提琴；play soccer踢足球 【跟踪训练】 (2)她在四岁时学习弹钢琴。 She learned to at the age of four. 3.be interested in对……感兴趣，后跟名词、代词、动名词或从句。 【拓展】其同义短语为take an interest in 【跟踪训练】 （3）我对他说的话感兴趣。 I what he said. 4.terrify .使害怕；使恐惧 例如：Don't terrify the lame boy with ghost stories.不要用鬼故事吓唬这个小孩。【拓展】be terrified of意为“非常害怕的；极度恐惧的”，后跟名词、代词或动名词。其同义短语为be afraid of。
定语从句 I prefer music that has great lyrics. I love music that I can sing along with. I like music that I can dance to. . Role-play 1. Hmm, depends which movie. 1) 本句省略了depends前的主语it和which movie后的从句部分we’ll watch，这是典型的口语表达形式。在口语和非正式场合，为保持语言简洁明了，交流者往往会省略彼此所知或逻辑上可明确推断的内容。 例如：Anything I can do for you? 我能为您做些什么吗？（省略句首部分Is there） Please hand me one of those books; I don’t care which. 请把那些书递给我一本，不管哪本都行。（省略句尾部分you hand me） 2) It depends (on) who/ what/ how/ whether…是一个常见句型。当depend后接疑问词及含有疑问词的短语和从句时，口语中会省略depend后的介词on，以求话语简练。 例如： It depends what day you catch me, and at what time of day. 这取决于你哪天见我，以及见我的时间。 Well, as for this matter, I can’t decide for now. Depends whether or not your dad will say yes. 嗯，这件事我现在决定不了，取决于你老爸是否会同意。 2. I just want to laugh and not think too much. 这句话中的to laugh和not think too much均为动词不定式，但后者在not和think之间省略了to。英语语句中当多个不定式结构并列使用时，to出现在第一个结构中，后面的往往会省略。再如： She likes to sing, dance and hang out with her friends. 她喜欢唱歌、跳舞、与朋友们外出消遣。 3. I prefer music that has great lyrics. 句中的prefer意为“更喜爱；更喜欢”，后可接名词、v.-ing形式或动词不定式。 如：I prefer the white bag. 我更喜欢那个白色的包。 Tony prefers staying / to stay at home on weekends. 托尼更喜欢周末待在家。 此外，prefer还可用于句型“prefer ... to ...”中，意为“喜欢……而不喜欢(胜过)……”。如：Linda prefers apples to pears. 琳达喜欢苹果而不喜欢梨。 I prefer reading books to watching TV. 我喜欢阅读而不喜欢看电视。 4. I suppose I’ll just listen to this new CD I bought. 仔细观察下面例句中suppose的用法和意义，然后补全结论部分所缺的内容。 a. We are supposed to get there on time. b. I suppose she will be back next year. c. —Do you suppose he will agree? —Yes, I suppose so. / No, I suppose not. a. We are supposed to get there on time. （1）观察例句a可知，“被期望/要求做某事”或“该做某事”可用 __________________ 结构表示，含有必须、应该做某事之意，相当于should。 b. I suppose she will be back next year. c. —Do you suppose he will agree? —Yes, I suppose so. / No, I suppose not. （2）例句b中“suppose +that从句”意为“猜测/假定……”，that可以省略，若为否定句，
人教版九年级语文下册第二单元测试卷 时间：100分钟满分：120分 一、积累与运用(31分) 1.下列词语中加点字的注音完全正确的一项是()(3分) A.蘸．水(zhàn)阔绰．(chuò)颓．唐(tuí)磕．一下(kē) B.拖．欠(tuō) 名讳．(huì) 笔砚．(yàn) 契诃．夫(kē) C.蓦．地(mù) 惋．惜(wǎn) 夹．袄(jiá) 茴．香豆(hún) D.魁．梧(kuí) 盘桓．(huái) 附和．(hè) 乱蓬蓬．(péng) 2.下列词语中没有错别字的一项是()(3分) A.哄笑羼水千钧之力无缘无故 B.荤菜荒唐望眼欲穿无精打彩 C.惦记门槛提心掉胆如坐针毡 D.坎肩洋溢不屑置辨一想天开 3.下列句子中加点词语运用不正确的一项是()(3分) A.既然人称大学问，那就要打扮得斯文模样儿，于是穿起了长衫，说话也歇斯 ．． 底里 ．．。 B.近年来，贪官携巨额赃款外逃事件频发，面对巨款流失境外的现实，我国的 诉讼制度目前还束手无策 ．．．．。 C.一个伟大的企业，对待成就永远都要战战兢兢 ．．．．，如履薄冰。 D.命运对他实在太苛刻了。然而，尽管奄奄一息 ．．．．，他还是不情愿死。 4.下列句子没有语病一项是()(3分) A.5月14日，“一带一路”国际合作高峰论坛在北京举行，国内外1500多名 嘉宾出席了这次会议。其中29个国家领导人和联合国、世界银行、国际货币基金组织的负责人出席了圆桌峰会。 B.柔山秀水间，初夏的雁栖湖畔绿意盎然、鲜花盛开。以古代丝绸之路兴盛时 期的中国汉唐特色为灵感设计的雁栖湖国际会议中心，如同一只展开双翅的鸿雁。 C.为了提高传统优秀文化特色，学校举办了“寻找家乡名人名画”活动。 D.中国家庭自行车健康营活动旨在以活动加赛事的形式，普及并宣传自行车绿
新人教版九年级第九单元测试题附答案 Unit 9 I like music that I can dance to. (时间:100分钟，满分:100分) Ⅰ. 单项选择。(每小题1分，共15分) ( ) 1. Mike's father bought ________ electronic watch for him as his birthday. ________ electronic watch looks very beautiful. A. a; The B. the; The C. an; The D. an; An ( ) 2. My English is poor. Can you ________ time to help me with it，Mike? A .share B. spare C. agree D. save ( ) 3. I ________ the man was about forty according to his looks. A. believed B. knew C. supposed D. accepted ( ) 4. I still remember the college and the teachers ________ I visited in London years ago. A. what B. who C. that D. which ( ) 5. There are ________ books in our school library. A. a lots of B. a great deal of C. plenty of D. the number of ( ) 6. He was born in a poor family，but his parents managed to buy books for him _______. A. in this way B. in a while C. once in a while D. for a while ( ) 7. I like the cartoon ________ has a happy ending and makes me ________. A. which; to laugh B. that; to laugh C. whose; laughing D. which; laugh ( ) 8. I enjoy the music ________ makes me ________. A. that; happily B. that; happy C. which; happily D. who; happy ( ) 9. You can ________ a note on his door if he is not in. A. give B. share C. stick D. put ( ) 10. I like that music, but the lyrics ________ good enough. A. aren't B. are C. isn't D. is ( ) 11. The first thing ________ my brother is going to do this afternoon is to write a letter. A. which B. that C. why D. who ( ) 12. —Which do you prefer，math ________ music? —I prefer music ________ math. A. or; to B. to; to C. or; or D. to; or ( ) 13. Did you enjoy the days ________ you spent in Beijing during the Spring Festival? A. where B. when C. that D. what ( ) 14. I prefer ________ rather than ________ to net bar. A. to stay at home; go out B. going out; stay at home C. staying at home; going out D. going out; to stay at home ( ) 15. — ________？ —It's wonderful. A. How much is the MP5 B. Do you like the MP5
九年级教案 第七讲 U2T1SA 1 The flowers and grass have gone. 花儿和草都消失啦。 go 在此处为不及物动词，意为“不复存在，不见了，丢失，失窃”。e.g. My new bike has gone. I can’t find it. 我的新自行车不见了，我找不到它了。 2 Look , there are several chemical factories pouring waste water into the stream. 看，有几个化学工厂正把废水排入河流中呢。 a. There be + sth. /s b. doing sth.为固定句型，意为“有某人或某物正在做某事”。 e.g. Look! There is a little girl crying in the street． 瞧！有个小女孩正在街上哭。 b. pour ... into把……倒入。 e.g. Please pour the sugar into a cup.请把糖倒入杯里。c. waste adj. 废弃的，无用的，丢弃的。 n. 浪费，废弃物 e.g. a waste of time 浪费时间。 v. 浪费e.g. waste one’s words 白费口舌。 U2T1SB 1 breathe v.意为“呼吸”，名词是breath，注意不同词性时单词的拼写。 e.g. We breathe fresh air．我们呼吸新鲜的空气。You can see your breath on a very cold day.
你可以在寒冷的天看到你的呼吸。 breathe in吸入，breathe out呼出，hold one’s breath屏住呼吸，take a (deep) breath (深深地)吸一口气。 2 produce v.在此意为“产生，造成，引起”, 表示结果。注意：produce一般侧重工业生产，农业产品，也包括创造脑力劳动产品，而make含义很广,没有具体限制生产何种产品。 e.g. The writer produces a new novel every year.、这位作家每年写一本新小说。 A hen produces eggs.母鸡产蛋。 Tom's mother is making a cake for him. 汤姆的妈妈在为他做蛋糕。 3 in a bad mood 意为“心情差”； in a good mood 意为“心情好”。 e.g. He is in a bad mood today. 他今天心情差 4 can’t bear sth./doing sth.意为“不能容忍某事/做某事。” e.g. I can’t bear the pain. 我受不了这疼痛。 I can’t bear staying up so late. 这么晚不睡觉我受不了。 5 hope v.希望。hope +从句e.g.I hope(that) you can come, because you are important to me. 我希望你能来，因为你对我来说很重要。 hope to do sth. 希望做某事。
研课标说教材说课稿 各位评委、老师： 大家好！ 我今天说课的内容是人教版九年级语文下册第二单元，整个说课我将分四部分进行讲述，即研课标、说教材、教学建议和中考分析。 一、研课标 （一）课标如是说 新课程标准下，“对话”已经成为语文教学的重要理念之一，它对阅读教学是这样表述的：“阅读教学是学生、教师、教科书编者、文本之间对话的过程”，而小说作为阅读教学的重要板块，这一理念的渗透尤为关键。 同时，《语文课程标准》要求学生能“欣赏文学作品，能设身处地地体验和理解作品”，“品味作品中富有表现力的语言”。这里值得注意的是“体验”、“领悟”和“品味”，它们不仅是第四学段目标中的关键词，也包容了以前各学段目标中的要求，其揭示的是依靠原有的知识和经验，把阅读材料加以“内化”，实现文本理解的主客观相统一。同时，课程标准也把阅读作为对话和交流的本质具体化了，引导学生在“体验”、“领悟”和“品味”的过程中，与文本作者进行心灵的交流和对话。 （二）课标下的单元目标 1、初中阶段要求能累计认识常用汉字3500个，其中3000个会写。本单元生字词较多，也较重要，应让学生积累文中重点字词。 2、在了解小说内容的基础上，体会小说的主题；在把握情节的前提下，着重欣赏人物形象，把握人物的性格；进一步了解小说多样化的表现手法和艺术风格。 3、重新设计人物命运；为小说编写故事；穿越时空的对话；发挥想象力和创造力，学习虚构故事，尝试进行小创作。 4、能用普通话复述小说情节；介绍小说人物；叙述自己的读书经历和感受。 5、能自主组织文学活动，在讲故事、竞猜小说人物、编手抄报等活动过程中，体验合作与成功的喜悦。 二、说教材 第二单元在九年级下册中处于极为重要的地位，是唯一的小说单元。它围绕着“人物画廊”这一中心选择了四篇中外小说，它们虽然题材不同，风格各异，但都是写人的名篇，在人物刻画方面各具特色。涉及的生活范围既有科举时代下层知识分子悲酸的命运，也有20世纪30年代中国农民的独特风貌；既有沙皇统治时期趋炎附势的小官僚形象，也有对美国西部淘金者硬汉形象的逼真刻画。其中人物的悲欢离合，喜怒哀乐和兴衰荣辱，折射出时代和社会的世态人情与精神风貌.对增长学生的见识，丰富他们的精神生活，是大有裨益的。 （一）编者意图 《语文课程标准》指出“语文是实践性很强的课程，应着重培养学生的语文
一、选择与划线部分意思相同或相近的选项。（5分） （）1. In the end，he got the full mark in the math exam. A. At last B. At the end C. At first （）2. He made a decision to leave his family. A. decide B. decided C. decides （）3. We are proud of our strong country. A. take pride in B. take pride C. are pride of （）4. She used to be afraid of the dark.. A. be afraid to B. be terrified C. be terrified of （）5. Wang ping is no longer a child. A. not…any more B. not…any longer C. not more 二、选择填空，从各题的三个选项中选出一个最佳答案。（共25分）（）6. They enjoyed _____ piano. A. play B. playing the C. playing （）7. _____ you _____ to go to the park when they were children? A. Did, use B. Did, used C. Do, use （）8. Mary _____ six dollars for the pen. A. spent B. paid C. cost （）9. I’m _____ in the _____ film. A. interested, interested B. interested, interesting C. interesting, interested （）10. --- _______________________? --- She is medium height. A. What’s she like? B. How is she? C. What does she like? （）11. He _____ has time for concerts, does he? A. hard B. hardly C. already （）12. My life _____ a lot in the last few years. A. change B. changed C. has changed （）13. I will eat ice, meat _____ noodles. A. instead of B. stead of C. instead for （）14. There used to be a tall tree in front of our classroom. _____? A. used there B. didn’t there C. wasn’t there （）15. That _____ like a good idea.
九年级数学上册第二单元练习题 1、在一次手工制作中，小明准备了一根长8米的铁丝，现在要制成一个矩形方框，并且要使面积尽可能大，你能帮小明制成方框吗？若能，请给出方法，并求出最大面积；若不能，请说明理由。 2、 已知方程2240x x k -+=。 （1） 当k ________时，方程有两个不相等的实数根。 （2） 当k ________时，方程有两个相等的实数根。 （3） 当k ________时，方程无实数根。 3、 设1x 、2x 是方程22430x x +-=的两个根，利用根与系数的关系，求下列各式的值： （1）12(2)(2)x x ++；（2） 2112x x x x + 4、 关于x 的方程2(6)860a x x --+=有实数根，则整数a 的最大值是________。 5、 关于x 的方程2(2)20ax a x -++=有两个相同的实数解，则a 的值是_________。 6、 关于x 的方程2610x x k -++=的两个实数根是1x 、2x ，且221224x x +=，则k 的值是_______。 7、 当m _________时，关于x 的方程21402x x m -+- =有两个不相等的实数根。 8、 关于x 的方程2(3)0x k x k +++=的一个根是2-，则另一个根是________。 9、 有一个两位数等于其各位数字之积的3倍，其十位数字比个位数字小2，求这个两位数。
10、 有100米的装修材料，在一大厅中想围成一个矩形的面积不小于600平方米的健身 房，其中大厅有一面墙是50米，用这些材料怎样设计才能建成健身房？ 11、 若2350p p --=，2350q q --=，且p q ≠，试求2211p q +的值。 12、 已知方程260x kx --=的两个根都是整数，则k 的值可以是( ) A 、1- B 、1 C 、5± D 、以上四个值中的任何一个 13、若一元二次方程22(4)60x kx x --+=无实数根，则k 的最小整数值是_________。 14、求证：不论k 取什么实数，方程2(6)4(3)0x k x k -++-=一定有两个不相等的实数根。 15、某商店将每件进货价为8元的商品按每件10元出售，每天可以销售200件，现在采用提高商品售价减少销量的办法增加利润，如果这种商品每件的销售价每提高0.5元，其销量就减少10件，问应将每件售价定为多少元时，才能使每天利润为640元？
一、课文内容梳理 《孔乙己》描写了孔乙己在封建腐朽思想和科举制度毒害下，精神上迂腐不堪，麻木不仁，生活上四体不勤，穷困潦倒，在人们的嘲笑戏谑中混度时日，最后被封建地主阶级所吞噬 的悲惨形象。篇幅不长，但是深刻揭露了当时科举制度对知 识分子精神的毒害和封建制度“吃人”的本质。具有强烈的 反封建意义。 《变色龙》作于1884年，俄国民意党人刺杀亚历山大二世之后，亚历山大三世一上台，在竭力强化警察统治的同时，也 搞了一些掩人耳目的法令，给残暴的专制主义蒙上了一层面纱。1880年成立的治安最高委员会头目洛雷斯?麦里可夫后 来当上了内务大臣，这是一个典型的两面派，人民称他为“狼 嘴狐尾”，这时的警察打着遵守法令的官腔，干着献媚邀功 的勾当。契诃夫刻画的警官奥楚蔑洛夫正是沙皇专制警察统 治的化身。因此，这篇作品讽刺、揭露的不仅仅是一个普通 的孤立的警察，也是那个崇拜官爵的俄国社会及沙皇专制统治。这篇小说通过对见风使舵、媚上欺下的奥楚蔑洛夫这个 沙皇专制统治的忠实走狗的刻画，巧妙地揭露了俄国警察制 度的反动和虚伪，讽刺了腐朽黑暗的沙皇专制统治，批判了 其反人民的本质。
《溜索》选自《遍地风流》，略有改动。云南怒江大峡谷,被称为“东方大峡谷”。峡谷的东面是被称为“万瀑千湖之山”的碧罗雪山,西面是中缅边境千里边防的高黎贡山, 谷底是奔腾咆哮的怒江。怒江没有船,惊涛怒浪上小船无法横渡, 两岸居民过江, 从前主要靠“溜索”桥。小说以其独特的视角，用传神凝练的语言，舒徐有致的节奏，层层烘托，表现了滇西马帮的生活。既突出了怒江峡谷的孤悬、高峻、险恶，又表现了马帮汉子沉着、冷静、从容的姿态，写出了作者对马帮汉子粗犷豪迈、勇敢无畏的精神的钦敬和赞颂，突出表现了人在自然面前接受挑战，战胜艰险的气定神闲的姿态。 《蒲柳人家》通过塑造何满子、一丈青大娘和何大学问的形象，将20世纪30年代京东北运河一带农村的风景习俗、世态人情展现在读者面前，为我们勾勒出了当时生活在京东北运河边的农民的性格和命运，热情地歌颂了那些淳厚朴实的农民。 二、单元字词汇总 傍午（bàn g）踱进（duó） 咸亨（xián）侍候（s hì） 荐头（jiàn）绰号（ch uò）
Unit 2 I think that mooncakes are delicious! 词句精讲精练 词汇精讲 1. put on put on在本课中意为“增加（体重）；发胖”。例如： I can eat what I want but I never put on weight. 我想吃什么就吃什么，但是从来不发胖。 【拓展】put on的其他用法： (1) 意为“穿上；戴上”。例如： It’s much too cold outside. You should put on your coat. 外面太冷了，你应该穿上外套。 She put on her coat and went out. 她穿上大衣出去了。 (2) 意为“上演；举办”。例如： The band is hoping to put on a UK show before the end of the year. 那个乐队希望年底之前在英国举办一场演出。 2. wish/hope (1)相同点：表示“想；希望”，宾语可为to do,不能用doing。例如： I hope/wish to visit Guilin. 我希望去桂林观光。 (2) 不同点：wish后可以跟复合宾语，即wish sb. to do sth.，而hope不能。例如： I wish you to go. (正) 我希望你去。 I hope you to go. (误) 我希望你去。 (3) 两者都可接that从句，但是“hope + that从句”表示希望，“wish + that从句”表示愿望，且从句的谓语 动词要用虚拟语气。例如： I hope you’ll be better soon. 我希望你很快好起来。 I wish I were really wealthy. 但愿我真的富有。 (4) wish后可接双宾语。例如： We wish you a happy New Year! 我们祝你新年快乐！ 3. miss miss为动词，意为“想念，思念”。例如： I’ll miss you when you go to Canada. 你到了加拿大以后，我一定会想你。 【拓展】 (1) miss作动词还有“未击中，未抓住”的意思。例如： I tried to hit the ball but I missed. 我努力地想击中球，但却未成功。 (2) miss还可意为“未赶上，错过”，是动词。例如： I missed the football match on TV last night. 我错过了昨天晚上电视中的足球赛。 (3) miss与like; mind; finish; enjoy; practice; be busy; stop; can’t help; give up等词一样后接动词的-ing形式。例如： I don’t want to miss seeing that film on tel evision tonight. 我不想错过今晚在电视上看那部影片的机会。 4. however however是副词，意为“不过；然而”，有转折的含义，相当于but，可位于句首、句中和句末。位于句首时，其后用逗号隔开；位于句中时，其前用分号或逗号，其后用逗号隔开；位于句末时，其前用逗号隔开。但but只能置于句首或句中。例如： She’s very intelligent. However, she’s quite lazy. 她非常聪明，但是她很懒惰。 【拓展】however与but