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安徽省皖西中学2009-2010第一学期九年级期

安徽省皖西中学2009-2010第一学期九年级期
安徽省皖西中学2009-2010第一学期九年级期

皖西中学(2012-2013

)初三英语期末考试试卷

第一学期

制卷:沙敏时间:120分钟分值:150分

第一部分听力(1’*30)

Ⅰ关键词语选择

你将听到五个句子。请在每小题所给的A,B,C三个选项中选出你所听到的单词或短语。每个句子读两遍。

1. A. seem B. game C. same

2. A. something B. anything C. sometime

3. A. fifteen B. fifteenth C. five

4. A. fall into B. jump into C. fall in love

5. A. in front B. in front of C .in the front of

Ⅱ短对话理解

你将听到十段对话,每段对话后有一个小题。请在每小题所给的A,B,C三个选项中选出最佳选项。每段对话读两遍。

6. What does the woman want to drink?

A. B. C

7. What’s Daming’s mother?

A. B. C

8. What kind of fruit does the woman like best?

A. B. C.

9. What does the man usually do after dinner?

A. B. C.

10.Which does Tony think is the most useful?

A. B. C.

11.Where does the conversation happen?

A. In the train station.

B. In the bookstore.

C. In the airfield.

12. What time dose Tom have to get up now?

A. At 7:20.

B. At 5:40 .

C. At 4:20.

13. Who is the shortest of the three?

A. Jim.

B. Jack.

C. Tom.

14. How are they going to hospital?

A. On foot.

B. By bike.

C. In a car.

15. Where were the 28th Olympic Games held?

A. In Beijing.

B. In Greece.

C. In London.

Ⅲ长对话理解

你将听到两段对话,每段对话后有几个小题。请在每小题所给的A,B,C三个选项中选出最佳选项。每段对话读两遍。

听下面一段对话,回答第16,17两个小题。

16. What place are they going to visit?

A. A library.

B. Tian’e Lake Park.

C. A zoo.

17.When will they meet?

A. At 8:00am.

B. At 9:00pm.

C. At 7:30.

听下面一段对话,回答第18,19,20三个小题。

18. Where is Hefei Olympic Center?

A. On Station Road.

B. Near Shengquan Road.

C. Near our school.

19. What did Mary do in the Olympic Center last week?

A. She played football and basketball.

B. She played tennis and basketball.

C. She played table tennis and had a swim.

20. How will Mary and James go to the Olympic Center?

A.ON foot.

B. By underground.

C. By bike.

Ⅳ短文理解

你将听到一篇短文,短文后有五个小题。请根据短文内容,在每小题所给的A,B,C三个选项中选出最佳选项。短文读两遍。

21. How far is it from the castle to the house?

A. 20 km.

B. 13 km.

C. 100 km.

22.What is the passage?

A. An advertisement.

B. A notice.

C. An invitation.

23. Why will you not be bored if you go there?

A. Because the weather is good.

B. Because there is an international jazz festival.

C. Because there is a large castle.

24. When is the best time to come to the writer’s house?

A .July. B. August. C. September.

25. How long does the writer ask his friend to spend holiday?

A. A few weeks.

B. This summer.

C. A week.

Ⅴ信息转换

Ⅵ单项填空(1’*20)

请在每小题所给的A.B.C.D四个选项中选出可以填入空白处的最佳选项。

31. bad news it is! We can't go to Hainan for our holiday.

A. What

B. How

C. What a

D. How a

32. There're students in our grade.

A. hundreds of

B. three hundreds of

C. three hundreds

D. three hundreds'

33. -Would you like one of the mooncakes? -

A. Yes, please

B. Yes, I would

C. No, please

D. No, I don't

34. If I ______ you, I _____ go with you.

A. am will

B. was would

C. were would

D. was would

35. John come to see us tonight, but he isn't very sure yet.

A. may

B. can

C. has to

D. must

36. He is enough to carry the heavy box.

A. the stronger

B. much stronger

C. strong

D. the strongest

37. His grandma for two years.

A. was died

B. has been dead

C. was dead

D. has died

38. Mike finished the work quickly, .

A. so did Tom

B. so Tom did

C. so was Tom

D. neither did Tom

39. There is ______milk in the bottle. Let’s go to buy som e.

A. a little

B. little

C. a few

D. few

40. Suddenly Edward came in and said he had to tell the class.

A. anything important

B. important everything

C. something important

D. important something

41. You'd better when your mouth is full of food.

A. don't speak

B. not to speak

C. not speak

D. not speaking

42. She isn't so at maths as you are.

A. well

B. good .

C. better

D. best

43. To buy CDs , I ________ my money.

A. run out

B. ran out

C. ran out of

D. run out of

44-I'm sorry I my homework at home.

-That's all right. Don't forget it to school this afternoon.

A. forget ...to take

B. forget... to bring

C. left...to take

D. left... to bring

45. This book Lucy's. Look! Her name is on the book cover.

A. must be

B. may be

C. can't be

D. mustn't be

46. Don't go out. It's raining .

A. quickly

B. heavily

C. loudly

D. hardly

47 . The boy was seen ______on the sports ground.

A. to play

B. play

C. played

D. to playing

48. -Can you understand me? -Sorry, I can understand you.

A. hardly

B. almost

C. ever

D. nearly

49. Jim likes to play football and was on school team.

A. ×; the

B. ×; ×

C. the; the

D. a; a

50. If you finish reading my book, please _______to me.

A. give it again

B. give again it

C. give back it

D. give it back

Ⅶ完形填空(1.5’*20)

阅读下列短文,从每小题所给啊A.B.C.D四个选项中选出最佳选项。

A

Canada is the second largest country is the world. It is over 7,000 kilometers from the 51 coast(海岸)to the east. It 52 six time zones(时区). 53 it is 9 a. m. in Vancouver on the west coast,it is 1:30 p, m. in St John's on the east coast.

English and French 54 the two main languages in Canada. About 60 percent of 55 people speak English, and about 25 percent speak French. More 56 70 percent of its population live in cities near the US border(边境).

Ottawa is the capital. Every year millions of tourists go there to 57 museums and take part in the cultural(文化的)activities. Toronto is the largest city of the country 58 about 2. 5 million people. Montreal is 59 second biggest French-speaking city in the world.

The maple leaf(枫叶) is the national symbol(象征)of Canada. The Canadian flag has a red maple leaf on a red 60 white background.

51. A. west B. east C. south D. north

52. A. is B. had C. has D. have

53. A. Which B. What C. Where D. When

54. A. are B. is C. will be D. has been

55. A. she B. his C. its D. he

56. A. up B. over C. about D. than

57. A. sees B. visit C. look D. find

58. A. with B. for C. from D. at

59. A. a B. an C. the D.不填

60. A. or B. and C. but D. however

B

Big schoolbags have been a serious problem for students for a long time. Maybe your schoolbag is too61 to carry, and it troubles you a lot 62 you want to find a book out to read. Now an e-textbook will 63 you.

It is said that e-textbooks are going to be 64 in Chinese middle schools. An e-textbook, in fact, is a small 65 for students. It is much 66 than a usual

schoolbag and easy to carry. Though it is as small as a book, it can 67 all the materials(材料)for study. The students can read the text page by page on the 68 , take notes with the pointer(屏写笔).Or even “ 69 ”their homework to their teachers by sending e-mails. All they have to do is to press a button.

Some people say e-textbooks are good. but some say they may be 10 for the students’ eyes. What do you think of it?

61.A.light B. heavy C. useful D. comfortable

62.A.till B. after C. before D. when

63.A.trouble B. prevent C .help D. understand

https://www.wendangku.net/doc/e510108538.html,ed B. kept C. invented D. lent

https://www.wendangku.net/doc/e510108538.html, B. radio C .pen D. computer

66.A.heavier B. lighter C. cheaper D. brighter

67.A.hold B. build C. discover D. practice

68.A.blackboard B. desk C. screen D. card

69.A.find out B. hand in C. get back D. give back

70 A. helpful B. famous C. good D. bad

Ⅷ补全对话(1’*5)

根据对话内容,从方框内的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Reporter: You just won the first prize in the State Tennis Competition. __71___

Michael: Thank you.

Reporter: Michael, how old are you?

Michael: Seven.

Reporter: Seven! ___72 _

Michael: Since I was three.

Reporter: __73 _

Michael: My father. And I take private lessons, too.

Reporter: ___74 _

Michael: Yes, I’ve taken lessons here for two years.

Reporter: How many days a week do you play?

Michael: __75_ _ I want to practice every day, but my parents say three or four days is enough.

Reporter: Are you going to continue with your tennis?

Michael: Uh-huh I want to be a professional tennis player when I’m older.

Reporter: Wish you greater success!

第三部分阅读理解

Ⅸ阅读理解(2’*20)

阅读下列短文,从每小题所给的A.B.C.D四个选项中选出最佳选项。

A

An old lady in a plane had a blanket(毯子)over her head and she did not want to take it off . The air hostess spoke to her, but the old lady said, “I have never been in a plane before , and I am frightened. I am going to keep this blanket over my head until we are back on the ground again !”

Then the captain came. He said, “Madam, I am the captain of this plane. The weather is fine, there are no clouds in the sky, and everything is going very well. ”But she continued to hide.

So the captain turned and started to go back. Then the old lady looked out from under the blanket with one eye and said, “I am sorry, young man, but I don’t like planes and I am never going to fly again. But I’ll say one thing, ”She continued kindly, “You and your wife keep your plane very clean!”

76. An old lady had _________ .

A. glasses

B. a blanket over her head

C. a coat

D. a basket

77. A. She didn’t want to ________ .

A. take it off

B. turn it off

C. get on

D. talk about it

78. _________ spoke to her .

A. The air hostess

B. The man next to her

C. her husband

D. one of her friends

79. The old lady had never been _________ before .

A. abroad

B. home

C. in a plane

D. in hospital

80. The woman didn’t like planes a nd she was never going ________ .

A. to fly again

B. to travel

C. to go abroad

D. to go home

B

Three travelers, Allan, Carl and Paul were sitting on the chairs in a train station. They were waiting for a train that was very late.

To pass the time, they began talking to each other.

At first, they talked about the weather and their work. Then Paul said, "Tell me—what would you most like to do if your doctor tell you that you have only three months to live?"

The other two men thought about this for a while, then Carl spoke.

“Well,” he said, “if I have only three months to live, I’ll take all my money out of the bank and go to foreign countries for holidays with my best friend, Erik. I'd like to travel to the places in the world as many as possible. And I'll stay at the best hotels and then eat the best food. I think I'll have a wonderful time.”

“That's very interesting.” Paul said.

With these words, he turned to the other man, saying, “And what about you?”

“I'll tell you a secret,” Allan said. “I always want to be a racing driver. So if I have only three months to live, the first thing I'd like to do is to sell my house. With the money I’ll buy the fastest car in the world. Maybe I can enter all the big motor races.”

Then he laughed, "I might even end up (以……而告终) world champion.”

“Now it's your turn,” Allan went on, “If your doctor tell you the bad news, what would you most like to do?”

“Oh,” said Paul with a smile. “I’ll go and see another doctor.”

81.The three men were talking _____________.

A. in the post office

B. in the waiting room

C. on the train

D. on the chairs

82.The man called ________ answered the question first.

A. Carl

B. Allan

C. Erik

D. Paul

83.The men began to talk about the weather and the work because they __________.

A. didn't know anything new

B. wanted to pass the time quickly

C. had nothing to do

D. were very interested in each other's work

84."I might even end up world champion." Here the word "champion" means ______in Chinese.

A.名人

B.赛车手

C.大款

D.冠军

85.Which sentence is right according to the passage?

A. The train didn't arrive on time.

B. Paul wanted to buy a racing car very much.

C. Allan was the second man to answer the question.

D. Carl didn't like traveling at all.

C

Once there lived a man in a small town. He often said, ”If I have lots of gold, I shall be the happiest man in the world.” One day he was traveling in North Africa. He lost his way and he was so hungry and thirsty that he couldn ’t walk any more. There were only stones and stones and sand around. Just then he saw a bag on the sand.He took it up. But when he opened it, he saw it was full of gold. He left the bag on the sand and cried, ”What is the use of gold to a hungry man?” 86.What did the traveler love best?

A. Food

B. Drinks

C. Stones

D. Gold 87.Then he lost his ways in North Africa, __________.

A. he had nothing to eat or to drink

B. he saw stones and sand around him

C. he was happy to find a bag of gold

D. he found a bag full of drinks 88. “He lost his way” means____________________.

A. he didn’t know where he was and where to go

B. he didn’t know where he came from

C. he didn’t know how to return home

D. he lost what he had on the way” 89.When he found a bag full of gold he felt______________. A. happy B. hungry C. thirsty D. sad 90.What’s the most useful to a hungry man?______________.

A. Food

B. Gold

C. Bread

D. Stones

D

91. Sydney Tower is in Sydney, Australia. A. the busiest street B. the biggest station C. the most beautiful park D. the highest point 92. If you want to book(预订) a ticket to Sydney Tower, y ou can’t

A. email sydneytower@https://www.wendangku.net/doc/e510108538.html,

B. fax 02 9333 9203

C. search

https://www.wendangku.net/doc/e510108538.html,.au D. dial 02 9333 9222 93. Frank wants to go to Sydney Tower with his two children. He will pay _________. A. $ 60 B. $ 90 C. $ 120 D. $ 150

94. Last Saturday, Johnson went to visit Sydney Tower. He had to get

down(从…下来) the tower________. A. after 11:30 am B. before 11:30 pm C. at 10:00 pm D. by 10:30am 95. The passage above is probably_______. A .a piece of news. B. a conversation C .a story D. an

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第四部分 写

Ⅹ单词拼写(1’*5)

根据首字母及汉语提示,完成下列单词的拼写,使句意明确,语言通顺。 96. You could take a bottle of w (酒) as a present in western countries. 97. Three years ago Ann p_____(更喜欢)apples to bananas. 98. I think English is very useful. Are you________ (感兴趣) in it? 99. Yesterday we saw some f (渔夫) fishing in the river.

100. It is known to all that eating junk food does harm to our (健康)

Ⅺ书面表达(20’)

中学生学习时间长、压力大,专家建议学生每天课后应采取适当的方式放松自己。假设你是阳光中学初三(1)班的班长,最近你对班上同学课后放松方式进行了调查。请根据表格提供的调查信息和要求写一篇短文。

注意:

1. 短文包括对调查相关信息的介绍和你自己的观点;

2. 词数:不少于80。题目和开头已为你写好,不计入总词数。

The proper way(s) for students to relax

I am monitor of Class 1, Grade 3, Sunshine Middle School. Recently I have made a survey of the students in my class on ways to relax after class.

答 题 卡

请同学们注意,将所有答案填入答题卡中!祝大家取得好成绩!

第一部分 听力

26.

27. 28. 29. 30.

第二部分 英语知识运用

Ⅵ单项填空(1’*20)

Ⅷ补全对话(1’*5)

71. 72. 73. 74. 75.

第三部分 阅读理解

Ⅸ 阅读理解(2’*20)

第四部分 写

Ⅹ单词拼写(1’*5)

96. 97. 98. 99. 100. Ⅺ书面表达(20’)

The proper way(s) for students to relax

I am monitor of Class 1, Grade 3, Sunshine Middle School. Recently I have made a survey of the students in my class on ways to relax after class

皖西中学(2012-2013

)初三英语期末考试试卷

第一学期

第一部分听力(1’*30)

1-5 CABAC 6-10 CACBA 11-15 BCABB

16-20 BCBCB 21-25ACBBA

26.Job 27.February 28.3:30 29.270 30.800

第二部分英语知识运用

Ⅵ单项填空(1’*20)

31-35 AAACA 36-40 CBABC

41-45 CBCDA 46-50 BAAAD

Ⅶ完形填空(1.5’*20)

51-55 ACDAC 56-60 DBACB

61-65 BDCAD 66-70 BACBD

Ⅷ补全对话(1’*5)

71-75CEAGB

第三部分阅读理解

Ⅸ阅读理解(2’*20)

76-80 BAACA 81-85 BABDC

86-90.DAADC 91-95. DACBD

第四部分写

Ⅹ单词拼写(1’*5)

96.wine 97.preferred 98.interested 99.fishermen 100.health

Ⅺ书面表达(20’)

参考作文:

T he proper way(s) for students to relax

I am monitor of Class 1, Grade 3, Sunshine Middle School. Recently I have made a survey of the students in my class on ways to relax after class.

There are 60 students in my class------ 51 boys and 29 girls. Different students have different ways to relax. Half of the students often watch TV. 12 students like to play computer games while 8 students enjoy listening to music. 5 students think doing sports is a good way and another five are busy to relax.

In my opinion, every student should choose a proper way to relax. I think taking exercise is a proper way because it can rest our brains and eyes. Besides, it can help improve our health.

安徽省合肥一中安庆一中等六校20182019学年高一新生入学素质测试数学答案

安徽六校教育研究会2018级高一新生入学素质测试 高一数学试题参考答案 一、 选择题(本大题共10小题,每题3分,满分30分) 题号 1 2 3 4 5 6 7 8 9 10 答案 C A A B C D A B B D 二、 填空题(本大题共4小题,每题4分,满分16分) 11.(2)(21)x x ++ 12. 1:2 13. 1 2 14.0 三、 (本大题共4小题,每题5分,满分20分) 15.解:原式=12 411222-++? ? 41=+5=. (5) 分 16.解:(1)如图所示△A 1B 1C 1; ……………………1分 (2)如图所示△A 2B 2C 2; …………………… 2分 (3)如图,点(4,5)B -,点2(5,4)B ,作2B 关于x 轴对称的点3(5,4)B -,连接3BB 交x 轴于点P ,此点P 即为所求点,即此时2PB PB +最小. 设一次函数y kx b =+的图像经过点

B 和3B ,则有54,45k b k b =-+?? -=+?解之得1 1 k b =-??=?,所以经过点B 和3B 的直线对应一次函数解析式为1y x =-+,当0y =时,1x =,故点P 的坐标为(1,0). … …5分 17.解:如图,过B 作BF ⊥AD 于F , 在Rt △ABF 中,∵sin ∠BAF = BF AB ,∴BF =ABsin ∠BAF =2sin 45°≈1.414, ∴真空管上端B 到AD 的距离约为1.414米. ……………………2分 在等腰Rt △ABF 中, AF =BF≈1.414.∵BF ⊥AD ,CD ⊥AD ,又BC ∥FD ,∴四边形BFDC 是矩形,∴BF =CD ,BC =FD .在Rt △EAD 中,∵tan ∠EAD = ED AD ,∴ED =ADtan ∠EAD =1.614?tan 30°≈0.932,∴CE =CD -ED =1.414-0.932=0.482≈0.48,∴安装铁架上垂直 管 CE 的长约为0.48 米. ……………………5分 18.解:(1)在图1中,由题意,点2(3,4)A m +,点2(,6)C m ,又点A 2、C 2均在反比例函数y =k x 的图象上,所以有4(3)6m m k +==,解之得6,36m k ==. 反比例函数解析式为 36 y x = . ……………………2分 (2)在图2中,2C E ∥GH ∥JK ,设2C E 和OJ 相交于点M ,则有 ME OM MF IH OI GI ==. 因为I 为GH 中点,所以GI IH =,所以ME MF =,即点M 为EF 中点. 又点F 为2C E 中点,所以21 2 ME MF C F ==. 所以121111 2222 OMF S C F OE MF OE S ?=???=??=,

淮北一中学生名单

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A .大小和方向均不变 B .大小不变,方向改变 C .大小改变,方向不变 D .大小和方向均改变 【答案】A 【解析】 【分析】 【详解】 橡皮参与了水平向右和竖直向上的分运动,如图所示,两个方向的分运动都是匀速直线运动,v x 和v y 恒定,则v 合恒定,则橡皮运动的速度大小和方向都不变,A 项正确. 3.一阶梯如图所示,其中每级台阶的高度和宽度都是0.4m ,一小球以水平速度v 飞出,欲打在第四台阶上,则v 的取值范围是( ) A 6m/s 22m/s v << B .22m/s 3.5m/s v <≤ C 2m/s 6m/s v << D 6m/s 23m/s v << 【答案】A 【解析】 【分析】 【详解】 若小球打在第四级台阶的边缘上高度4h d =,根据2 112 h gt = ,得 1880.4s 0.32s 10 d t g ?= == 水平位移14x d = 则平抛的最大速度

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2017-2018年安徽省合肥一中高一上学期期末数学试卷与答案Word版

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安徽省铜陵市第一中学下册抛体运动达标检测卷(Word版 含解析)

一、第五章抛体运动易错题培优(难) 1.一种定点投抛游戏可简化为如图所示的模型,以水平速度v1从O点抛出小球,正好落入倾角为θ的斜面上的洞中,洞口处于斜面上的P点,OP的连线正好与斜面垂直;当以水平速度v2从O点抛出小球,小球正好与斜面在Q点垂直相碰。不计空气阻力,重力加速度为g,下列说法正确的是() A.小球落在P点的时间是1 tan v gθ B.Q点在P点的下方 C.v1>v2 D.落在P点的时间与落在Q点的时间之比是1 2 2v v 【答案】D 【解析】 【分析】 【详解】 A.以水平速度v1从O点抛出小球,正好落入倾角为θ的斜面上的洞中,此时位移垂直于斜面,由几何关系可知 111 21 1 2 tan 1 2 v t v gt gt θ== 所以 1 1 2 tan v t gθ = A错误; BC.当以水平速度v2从O点抛出小球,小球正好与斜面在Q点垂直相碰,此时速度与斜面垂直,根据几何关系可知 2 2 tan v gt θ= 即 2 2tan v t gθ = 根据速度偏角的正切值等于位移偏角的正切值的二倍,可知Q点在P点的上方,21 t t<,

水平位移 21x x >,所以21v v >,BC 错误; D .落在P 点的时间与落在Q 点的时间之比是11 22 2t v t v =,D 正确。 故选D 。 2.甲、乙两船在静水中航行的速度分别为5m/s 和3m/s ,两船从同一渡口过河,已知甲船以最短时间过河,乙船以最短航程过河,结果两船抵达对岸的地点恰好相同。则水的流速为( ) A .3m/s B .3.75m/s C .4m/s D .4.75m/s 【答案】B 【解析】 【分析】 【详解】 由题意,甲船以最短时间过河,乙船以最短航程过河,结果两船抵达对岸的地点恰好相同,可知,甲乙实际速度方向一样,如图所示 可得 tan v v θ= 水甲 cos v v θ= 乙 水 两式相乘,得 3sin =5 v v θ= 乙甲 则3 tan =4 v v θ=水 甲,解得v 水=3.75m/s ,B 正确,ACD 错误。 故选B 。 3.物体A 做平抛运动,以抛出点O 为坐标原点,以初速度v 0的方向为x 轴的正方向、竖直向下的方向为y 轴的正方向,建立平面直角坐标系。如图所示,两束光分别沿着与坐标轴平行的方向照射物体A ,在坐标轴上留下两个“影子”,则两个“影子”的位移x 、y 和速度v x 、v y 描述了物体在x 、y 两个方向上的运动。若从物体自O 点抛出时开始计时,下列图像中正确的是( )

2019—2020学年度安徽省合肥一中第一学期高一第二次段考高中化学

2019—2020学年度安徽省合肥一中第一学期高一第 二次段考高中化学 化学试卷 注意:所有答案均要写在答题卡上 可能用到的相对原子质量: H-1 C-12 O-16 Na-23 S-32 K-39 Cl-35.5 Mg-24 Mn-55 Ag-108 一、选择题〔每题只有一个正确答案,共18小题,共54分〕 1.想一想:Ba 〔OH 〕2〔固态〕、CuSO 4〔固态〕、CH 3COOH 〔液态〕这些物质什么缘故归 为一类,以下哪个物质还能够和它们归为一类 A .75%的酒精溶液 B .硝酸钠 C .Fe 〔OH 〕3胶体 D .豆浆 2.从硫元素的化合价态上判定,以下物质中的硫元素不能表现氧化性的是 A .Na 2S B .S C .SO 2 D .H 2SO 4 3.有如下反应:①2BrO 3-+Cl 2=Br 2+2ClO 3-,②ClO 3-+5Cl -+6H +==3Cl 2+3H 2O , ③2FeCl 3+2KI==2FeCl 2+2KCl+I 2,④2FeCl 2+Cl 2==2FeCl 3。以下各微粒氧化能力由强到弱的 顺序正确的选项是 A .ClO 3->BrO 3->Cl 2>Fe 3+>I 2 B .BrO 3->Cl 2>ClO 3->I 2>Fe 3+ C .BrO 3->ClO 3->Cl 2>Fe 3+>I 2 D .BrO 3->ClO 3->Fe 3+>Cl 2>I 2 4.以下表达正确的选项是 A .将5.85gNaCl 晶体溶入100mL 水中,制得0.1mol/L 的NaCl 溶液 B .将25g 无水CuSO 4溶于水制成100mL 溶液,其浓度为1mol/L C .将w g a %的NaCl 溶液蒸发掉2 w g 水〔未有晶体析出〕,得到2a %的NaCl 溶液 D .将1体积c 1mol/L 的硫酸用4体积水稀释,稀溶液的浓度为0.2c 1mol/L 5.在反应:3BrF 3+5H 2O==HBrO 3+Br 2+O 2+9HF 中〔BrF 3中Br 为+3价,F 为-1价〕,当有 2mol 水被氧化时,由水还原的BrF 3和总的被还原的BrF 3物质的量分不是 A .1mol 、3mol B .2mol 、3mol C .4/3 mol 、2mol D .3mol 、1mol 6.以下反应的离子方程式正确的选项是 A .氨气通入醋酸溶液 CH 3COOH+NH 3 == CH 3COONH 4 B .澄清的石灰水跟盐酸反应 H ++OH - == H 2O

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