unit8培优专项训练

第一篇：unit8培优专项训练

培优专项训练八

Unit 8 主题阅读

阅读理解

A

Zhao Hua is a student from a university. He has led a group of university student volunteers since last year. They help children at a primary school with their studies and daily lives.

“ When I was a small child,” Zhao said, “ I knew March 5th was a day for people to learn from Lei Feng and help others, but I didn‟t know the real meaning of the spirit of Lei Feng. Now when I see the smiling faces of the kids I have helped, I deeply understand Lei Feng. Helping others makes me happy.”Lei Feng(1940—1962)is one of the best-known soldiers in Chinese history. He lost his parents when he was very young. His neighbors brought him up. He died in an accident at the age of 22. He did manymoney to the parents of another soldier, and bought a ticket for a woman he didn‟t know without telling her his name.

On March 5th,1963, Chairman Mao called on people to “ Learn from Lei Feng” and made the day“Lei Feng Day”.

Today almost 50 years has passed since Lei Feng‟s death. Some people say that the spirit of Lei Feng is out. There have been many reports about the coldness (冷漠) of people towards strangers. This has made many Chinese people think deeply about themselves.

Many people think we need to promote (提倡) that spirit again. The important thing is that we must be ready to help others and make it a habit. 1. Which day is “Lei Feng Day”?

A. May 3 rd.B. May 5 th.C. March 3 rd.D. March 5 th. 2. Who brought Lei Feng up?

A. His parents.B. Chairman Mao.C. His neighbors.D. Soldiers.

3. The underlined phrase “good deeds” means _________ in Chinese.

A.好人B.好事C. 好梦D. 好主意

4. Which of the following is NOT TRUE according to the passage?

A. Lei Feng gave his money to another soldier‟s

parents.

B. Lei Feng bought a ticket for a woman and he

told his name to her.

C. Lei Feng always helped others. D. We should learn from Lei Feng.

5. What‟s the best title (标题) of this passage ?A. Lei Feng‟s SpiritB. Lei Feng‟s death

C. Lei Feng‟s good neighborsD. University Student Volunteers

B

Like many people, I have no clear idea about heroes. At some point, we all wonder if we need a hero and what a hero really is.

Although there are a lot of differences in cultures, heroes around the world generally share a number of characteristics (特点) which give us courage and make us want to learn from them.

A hero does something worth talking about. A hero has a special story to tell and people think highly of it. But a hero is not just the person with great fame (声誉) .

A hero has powers (力量) larger than himself. Some people want to live like a hero, and they have to experience life with a new and further meaning. A sure test for would-be heroes is what or whom they serve. What do they want to live and die for? If the answer suggests they serve only their own fame, they may be famous persons but not heroes.

the power to move people. He creates new possibilities. Without Gandhi, India might still be part of Britain. Without Martin Luther King, Jr., Americans might take different buses, eat in different restaurants, go for walks in different parks, and shop in different stores because of the different colours of their skin.There might be changes in society without a hero, but the speed of change would be rather slow. Thanks to heroes in history, they make the society develop so rapidly.

1. According to this passage, a hero is a person who always ________.

A. gives us courage

B. thinks highly of othersC. shares great fame

D. stands on the mountaintop

2. If you want to live like a hero, you should _______. A. experience a new and meaningful lifeB. listen to something worth talking aboutC. serve your own fame and try to be famous D. know where and how you want to live and die 3. The underlined word “vision” in the passage means “__________”.

A. 风景B. 想象C. 远见D. 形象

4. Black people in America used to __________ before Martin Luther King, Jr..

A. shop at the white‟s storesB. drive buses with the whiteC. take walks in the white‟s parksD. eat in restaurants without the white5. What can we learn from the passage?

A. We don‟t need heroes anymore at some point now.

B. Heroes are all the same though different in cultures.

C. People get powers from heroes to move to a new place.

D. Our society has developed faster because of heroes in history.

综合提升训练

(八)

I. 单项选择

1. This is ________interesting story and it is also ________ useful one. A. an; anB. an; theC. an; aD. a; a 2. I don‟t like this one. Please show me ________ one. A. otherC. anotherA. Germen

B. the othersD. the other oneB. Germany

D. Germans

3. There are five ________over there. C. Germanys

4. I think you can do the work ________.

A. yourselfB. myselfC. himselfD. your 5. The ________of the planes made us feel sick. A. voiceB. noiseC. soundD. smell 6. ________ good health you have!

A. How aB. What aC. HowD. What

7. This plane is made ________ paper and it was made ________ my mother last night. A. of; byB. from; byC.with; forD. in ; with

8. They all looked ________at the teacher and felt very ________. A. happy; happyC. happy; happily A. many

B. happily; happilyD. happily; happy C. littleD. a lot of

9. It was a dry year. We‟ve had ________ rain.

B. a few

10. Could you tell me when the meeting ________? A. beginB. beginsC. will beginD. beginning

11. I don‟t know the school, but it‟s ________ to be quite a good one.

A. told B. spokenC. talkedD. said A. is finished

B. was finished

12. When your homework ________, you may go home.

C. will be finishedD. has finished

13. When I looked into the room, I found Philip himself ________ in bed.

A. lies

B. lyingC. lay

D. lie

14. The Wangs ________here for ten years.

A. is livingB. have livedC. has livedD. lives

15. They ________the station ________the train started.

A. won‟t leave; until

B. not leave; untilD. left; until

C. didn‟t leave; until II.完形填空

Ever since I was little, my favourite season was winter. I loved to play in the snow and enjoyed the hot chocolate.

winter never gave me the special gift of snow on my birthday. I would ask my it didn‟t snow on my birthday. She would laugh and tell me I asked too many questions. one day, she promised that she would make it snow on my next

birthday.

That year, my birthday, my grandmother died. I was sad but angry because she had promised to make it snow. The day of my sixth birthday, I woke up and ran to the window, hoping to see just one snowflake(雪花). But there was no . I felt mad at my grandmother. She had broken a promise.

By my sixteenth birthday, I , even though I still wished for it.During my party, I stayed with my friends and family and was truly Then I saw the white snow down all around. I was so excited that I ran around screaming and laughing. My friends all laughed me, but I didn‟t care.

When I home, my grandpa said he had a gift for me. I was given me a gift. It was a small white box, which looked old. I opened it. There was a crystal snowflake(冰晶雪花)with a card that , “Happy Birthday.”

How could this be? My grandpa said it was my grandmother‟s final on my “sweet I was that my smiling grandmother angel was and had been watching over me.

B. Unluckily

sixteenth”. I cried. 16. A. Certainly

C. ImportantlyD. Luckily

17. A. whenB. howC. whetherD. why 18. A. ButB. OrC. Then19. A. onB. afterC. before21. A. had gotC. had found

D. So D. in

20. A. seasonB. snowC. breakfastD. winter

B. had madeD. had lost

D. feared

22. A. happyB. sadC. angryD. sorry 23. A. hadB. wasC. played24. A. fell

C. disappearingD. falling25. A. withB. atC. from

D. off

D. flew

26. A. arrived atB. reached atC. got

B. standing

27. A. excitedB. surprisedC. pleasedD. sad 28. A. wroteB. saidC. explainedD. appeared 29. A. orderB. mistakeC. wishD. decision 30. A. sureB. angryC. sadD. confident III.阅读理解

Mrs. Blanches‟ husband went off on a business trip to America. He planned to leave New York for Washington. He wanted to catch the 4:00 pm plane to Washington. It was seven o‟clock in the afternoon. Mrs. Blanches received a telephone call from her husband. He told her that he was still at the New York airport. Mrs. Blanches was so surprised and asked him what happened.

“What happened, honey?” asked Mrs. Blanches. “Well,” said Mr. Blanches.

“I really don‟t know what happened, honey. Everything was going fine. At half past three, I got my air ticket, checked my luggage and waited in line at the gate. I walked across the runaway(飞机跑道) to the airport and on my way I saw one of my old friends. Have you

remembered him? His name is Jack Smith. Now Jack Smith is an engineer who works at the airport. I was excited that I shouted to him. I came up and wanted to shake hands with Jack. But a policeman ran to me quickly and caught me.”

“Why did he catch you?” Mrs. Blanches asked.

“I don‟t know,” said Mr. Blanches. All I said was“Hi,Jack!”

“Yeah, that is why they wouldn‟t let you go,” said Mrs. Blanches. “They thought you were going to do harm to the whole plane. Only terrorists want to take control of a plane, and that is called „

31.What was Mrs. Blanches‟ husband‟s destination(目的地)? A. Washington, America.B. South America. C. New York.D. The New York airport. 32. Where was Mr. Blanches when he called his wife? A. He was on the airport to Washington.B. He was still at the New York Airport. C. He was in Washington. D. He was on the railway station. 33. Who was Jack Smith?

A. Mr. Blanches‟ new customer.B. Mr. Blanches‟ old customer. C. Mr. Blanches‟ brother.D. Mr. Blanches‟ friend.

34.What does the underlined word mean in Chinese?

A.恐怖B.逮捕C.劫机 D. 别动

35. Why did the policeman catch Mrs. Blanches‟ husband?

A. Because they thought he was going to do harm to the plane. B. Because they wanted to get his help in catching terrorists. C. Because they knew that he was a terrorist. D. Because Mrs. Blanches asked them to do so.

IV.词汇运用

36. Please help _______(你自己) to some fish, Tom. Don‟t be so shy. 37. Man can‟t live ________(没有) water, so we must make good use of it. 38. Please listen to the speaker _________(仔细地) when he speaks. 39. She is such a pleasant and _________(有帮助的)girl that we all like her.

40. The foreign teachers in our school are from Germany. They are ________(德国人). V. 句型转换

对画线部分 提问)

_________ _________ does a football match last?

42. The old lady was so tired that she couldn‟t go any further.(改为简单句)

The old lady was _________ _________ to go any further. 43.Their new house is twice as big as the old one.(改为同义句)

Their new house is twice _______ ________of the old one.

44. I wonder how I can get to the nearest underground station. (改为同义句)I wonder ________ _______get to the nearest underground station. 45.If you do exercise a lot, you will be healthy.(改为同义句)

The ______ exercise you do, the _______ you will be.

第二篇：九年级化学培优辅导训练

(一)

————化学用语简单介绍

化学用语是化学学习的专门语言，它包括了元素符号、化学式和化学方程式。

一、元素符号：用来表示元素的符号。国际上规定是用这种元素的拉丁文名称的第一个大写字母表示。如果几种元素拉丁文名称的第一个字母相同，则在后面加上一个小写字母来区别。

练习：写出下列元素的符号：

钴：铜：钙：氯：锰：镁：金：银：氖：钠：

二、化学式：用元素符号和数字的组合表示物质组成的式子，叫做化学式。 注意：

①、只有纯净物才有化学式，混合物没有;

②、一种纯净物只有一个化学式。

1、化学式的读法：

2、化学式的写法：

(1)单质的化学式的写法：

练习：写出下列单质的化学式：

氧气：氮气：氯气：氢气：铜：铁：水银： 金刚石：硫：红磷：硅：氖气：氦气：

(2)化合物的化学式写法：

按照化合物的组成和性质可以分为：氧化物、酸、碱、盐四类。

氧化物：由两种元素组成，其中一种元素是氧元素的化合物。(某元素+氧元素) 酸：由H+和酸根离子组成的化合物。(H++酸根)

碱：由金属离子和氢氧根离子组成的化合物。(金属离子+OH-) 盐：由金属离子和酸根离子组成的化合物。

练习：写出下列物质的化学式：

二氧化碳：二氧化硫：一氧化碳：五氧化二磷

水：四氧化三铁：氧化汞：氧化镁：二氧化氮： 硫酸：硝酸：碳酸：磷酸：盐酸(氢氯酸)氢氧化钠：氢氧化钙：氢氧化铜：氢氧化铁：氢氧化亚铁：氢氧化镁：氢氧化钾：

氯化钠：氯化镁：氯化铜：氯化铁：氯化亚铁： 硫酸铜：硫酸钠：硝酸钾：碳酸钙：碳酸钠：

第三篇：培优班材料,平行四边形专题训练

特殊四边形专题三：特殊四边形中的探究问题

有关特殊四边形中的探究问题是涉及特殊四边形的几何动态问题，要求学生自主探索、发现问题、总结规律，因此要求同学们对一些特殊四边形的性质要掌握到位。解决此类问题的方法是先明确在变化过程中什么“不变”，特殊位置在什么地方，再从特殊到一般进行探究，这种方法在以后的数学学习中会经常用到。

【例1】已知：正方形ABCD中，∠MAN=45°，∠MAN绕点A顺时针旋转，它的两边分别交CB，DC(或它们的延长线)于点M，N，当∠MAN绕点A旋转到BM=DN时(如图1)，易证MB+DN=MN。

(1)当∠MAN绕点A旋转到BM≠DN时(如图2)，线段BM，DN和MN之间有怎样的数量关系?写出猜想，并加以证明;

(2)当∠MAN绕点A旋转到如图3所示的位置时，线段BM，DN和MN之间又有怎样的数量关系?写出你的猜想，并说明理由。

【例2】(1)操作发现：如图1，在矩形ABCD中，E是BC的中点，将ABE沿AE折叠后得到AFE，点F在矩形ABCD内部，延长AF交CD于点G，猜想线段GF与GC有数量关系，并证明你的结论。

(2)类比探究，如图2，将(1)中 的矩形ABCD改为平行四边形，其他条件不变，(1)中的结论是否仍然成立?并说明理由。

【例3】如图，正方形ABCD的角线AC，BD相交于点O。

(1)若E为AC上一点，过A作AGEB于G，AG，BD交于F，求证：OE=OF;

(2)若点E在AC的延长线上(如图2)，AGEB交EB的延长线于G，AG的延长线交直线BD于点F，其他条件不变，OE=OF还成立吗?若成立，请给予证明;若不成立，请说明理由。

第四篇：11月15日离子鉴别培优训练

五题全对,….大爷给你跪了

• 1.下列各组物质，只用组内溶液相互混合的方法就能鉴别的是() •A、KOH、Na2SO

4、CuSO

4、MgCl2

•B、K2CO

3、BaCl

2、Na2CO

3、HCl

•C、Na2SO

4、BaCl

2、KNO

3、NaCl

• D、NaNO

3、AgNO

3、KNO

3、NaCl

•

•

•

• 2.下列各组物质的溶液，不另加试剂就能一一鉴别的是

• A.NaOHHClCuSO4MgSO4

• B.KNO3H2SO4NaOHBaCl2

• C.MgSO4NaClFeCl3NaOH

• D.Na2CO3K2SO4BaCl2HCl

•

•

•

• 3. 下列四组溶液，只提供无色酚酞试液不能鉴别的是()。 • A. Na2CO

3、Na2SO

4、H2SO

4、NaOH

• B. NaOH、Ca(OH)

2、HCl、Na2CO3

• C. HCl、H2SO

4、Na2CO

3、KNO3

• D. Na2SO

4、Ba(OH)

2、H2SO

4、HCl

•

•

•

• 4.下列各组物质的溶液，不另加任何试剂就能一一区别开的是(• A.NaOHCuCl2HCl

•B.Na2CO3HClCaCl2

• C.KNO3MgCl2KOH

• D.NaClKClAgNO3

•

•

•

•

• 5.下列四组溶液，不用其他试剂和试纸就能区别开来的一组是(• A、HCl、Na2CO

3、BaCl

2、Na2SO4

•B、H2SO

4、Na2CO

3、Na2SO

4、H2O

• C、NaCl、HCl、NaOH、Na2SO4

• D、HCl、NaOH、NaCl、H2O))

第五篇：2018年中考数学精品资料《平行四边形》培优训练

1、如图，□ABCD的周长为20，BE⊥AD，BF⊥CD，BE=2，BF=3。则□ABCD的面积为 。

BAD C

FBACEDE

1题图 2题图

2、如图，在□ABCD中，已知AD=8，AB=6，DE平分∠ADC交BC边于点E，则BE等于( ) A、2 B、4 C、6 D、8

3、如图，在周长为20的□ABCD中，ABAD，AC、BD相交于点O，OE⊥BD交AD于E，则△ABE的周长为( )

A、4 B、6 C、8 D、10 EAD绿EA紫 D红GH黄 橙蓝OB BCFC 3题图 4题图

4、某广场上有一个形状是平行四边形的花坛(如图)，分别有红、黄、蓝、绿、橙、紫6种颜色的花。如果有AB∥EF∥DC，BC∥GH∥AD，那么下列说法中错误的是( ) A、红花、绿花种植面积一定相等 B、紫花、橙花种植面积一定相等 C、红花、蓝花种植面积一定相等 D、蓝花、黄花种植面积一定相等

5、如图，l1∥l2，BE∥CF，BA⊥l1，DC⊥l2，下面的四个结论中：①AB=DC;②BE=CF;③SABESDCF;④S□ABCD=S□BCFE。其中正确的有( )

A、4个 B、3个 C、2个 D、1个

EAEFCD l1D

P

l2AB BCF 5题图 6题图

6、如图，在四边形ABCD中，P是对角线BD的中点，E、F分别是AB、CD的中点，AD=BC，∠PEF=18，则∠PFE的度数为 。

7、四边形中，有两条边相等，另两条边也相等，则这个四边形( ) A、一定是平行四边形 B、一定不是平行四边形 C、可能是平行四边形 D、以上答案都不对

8、如图，□ABCD中，E是BC边上的一点，且AB=AE。 (1)求证：△ABC≌△EAD;

(2)若AE平分∠DAB，∠EAC=25，求∠AED的度数。

BECAD00

9、如图，□ABCD内一点E满足ED⊥AD于D，且∠EBC=∠EDC，∠ECB=45。找出图中条与EB相等的线段，并加以证明。

10、如图，在△ABC中，AB=AC，延长BC至D，使CD=BC。点E在边AC上，以CD、CE为邻边作□CDFE。边点C作CG∥AB交EF于点G，连接BG、DE。 (1)∠ACB与∠DCG有怎样的数量关系?请说明理由; (2)求证：△BCG≌△DCE。

11、如图，在□ABCD中，∠BAD=32，分别以BC、CD为边向外作△BCE和△DCF，使BE=BC，DF=DC，∠EBC=∠CDF，延长AB交边EC于点H，点H在E、C两点之间，连接AE、AF。 (1)求证：△ABE≌△FDA; (2)当AE⊥AF时，求∠EBH。

BCAFD0

0AEBDCAEGFBCD

EH

12、如图，□ABCD中，BF⊥CD，BE⊥AD，∠EBF=60，AE=3，DF=2。求EC、EF的长。

13、如图1，在四边形ABCD中，AB=CD，E、F分别是BC、AD的中点，连接EF并延长，分别与BA、CD的延长线交于点M、N，则∠BME=∠CNE(不需证明)。

(温馨提示：在图1中，连接BD，取BD的中点H，连接HE、HF，根据三角形中位线定理，证明HE=HF，从而∠1=∠2，再利用平行线性质，可证得∠BME=∠CNE。) 问题一：如图2，在四边形ADBC中，AB与CD相交于点O，AB=CD，E、F分别是BC、AD的中点，连接EF，分别交DC、AB于点M、N，判断△OMN的形状，请直接写出结论。

问题二：如图3，右△ABC中，ACAB，D点在AC上，AB=CD，E、F分别是BC、AD的中点，连接EF并延长，与BA的延长线交于点G，若∠EFC=60，连接GD，判断△

0

0

BCFAED

AGD的形状并证明。

B H2MANF1ADCFCOMNEBEDGAFDE 图① 图②

BC 图③