甘肃省平凉市崆峒区2016届九年级上学期期末质量检测英语试题(附答案)$669208

甘肃省平凉市崆峒区2016届九年级上学期期末质量检测英语试题(附答案)$669208
甘肃省平凉市崆峒区2016届九年级上学期期末质量检测英语试题(附答案)$669208

2015-2016学年度第一学期期末质量检测题(卷)

九年级英语

(总分150分,答题时间120分钟)

考生注意:本试卷含听力,所有试题均在答题卡上作答,否则无效。

A卷(100分)

Ⅰ. 听力理解(共四节,共20小题,满分20分)

第一节:听句子,从所给图中选出与所听到句子情景相同(相近)的图画.每个句子读两遍.

A B C D E

第二节:情景反应.听句子,根据所听内容选择相应的答语,每个句子读两遍.

6. A. OK B.Yes,do it please. C.Here you are.

7.A. Yes,he is. B.No,he isn't. C. He's a teacher.

8. A. It's April. B.It's spring C.Sunday.

9. A.All right B. I’m fine C.Are you OK?

10.A. You decide. B.No,I don't think so.C.Never mind.

第三节:听下面5段小对话,每段对话后有一个小题,从题中_所给的三个选项中选出一个最佳选项,每段对话读两遍.

11.A. English.B.Chinese. C. Maths.

12. A.30.B.20.C.50.

13.A.A lion. B.A panda.C.A tiger.

14.A. She's going to see a film. B. She's going to have an exam.

C. She's going to do her lessons.

15.A.In a shop.B.In a schoo1. C. In a library.

第四节:听短文,根据短文内容及所给问题选择最佳答案,短文读两遗.

16. Why did Victor drive his car to the town?

A.To buy some food.B.To visit his friend. C. To send the boys to school

17. Where were the boys and the dog when Victor was in the shop?

A. In the shop.B.In the car. C. At school.

18. What did Victor do at once when he was told that his car was driven off?

A.He called the police.B.He bought a new car.C.He ran after the car.19. What did the dog and the boys do while the thief was driving the car away?

A.They jumped off the car bravely.B.They sat there quietly.

C. The dog barked and the boys shouted at the thief.

20. What happened at the end of the story?

A. The thief sent the car, the boys and the dog home.

B.The family lost the car, the boys and the dog.

C. The police caught the thief.

Ⅱ. 词汇(每题1分, 共10分)

A) 根据汉语或首字母提示写出所缺单词。

21. Anyone who breaks the laws will be _________ (惩罚)

22. If you are interested in something, your brain is more ________(活跃的).

23. Could you please tell me the way to the post office? I want to buy s________.

24. I don’t know how to p this word.

25. When will the ___________(国际的) meeting be held ?

B) 用括号中所给词的适当形式填空。

26. If you want to buy medicine, go to the ________ (two) floor.

27. I can’t understand the (speak) English. Can you help me?

28. The hen ______(lay ) an egg every day.

29. The boy ________ (call) Jackie is over there.

30. (look) after the patients is a nurse’s job.

Ⅲ. 单项选择(每题1分,共20分)

31 . ____ old man behind Tom is _____ university teacher.

A. An; an

B. A; the

C. The; a

D. The; an

32. When he was a child, he used to __________ strawberries.

A. liking

B. like

C. liked

D. likes

33. --- What music do you like?

--- I like music that I can sing along ______ or dance ______.

A. to ; with

B. with; with

C. to; to

D. with; to

34. I spent half an hour ___________ my homework.

A. finishing to do

B. to finish doing

C. finishing doing

D. finished

35. Lucy thinks that ____ English movies isn’t a good way.

A. watch

B. watched

C. watching

D. to watch

36. Tom preferred _______TV at home to _______ to the party.

A. to watch; go

B. watching; going

C. watching; go

D. to watch; going

37. Can you tell me the best way ________ the problem?

A. to solve

B. solving

C. solve

D. solved

38. His _______ made us so sad that we couldn’t do anything.

A. dead

B. die

C. dying

D. death

39. Carmen likes musicians who _______ different kinds of music.

A. plays

B. play

C. is playing

D. was playing

40. The old man lives ________, but he doesn’t feel

A. lonely; alone

B. lonely; lonely

C. alone; lonely

D. alone; alone

41. I like English. Tome likes it_______.

A. either

B. also

C. as well as

D. as well

42. The words are too difficult. I must ______.

A. look up them

B. look them up

C. look up they

D. look they up

43. My parents are patient _________ me.

A. in

B. with

C. to

D. on

44. The baby is always crying. He _______ be hungry.

A. can’t

B. must

C. should

D. would

45. --- Can you tell me why you learn English so well?

--- It’s very simple. ______ you study, _______ grades you will get.

A. The harder; the best

B. The hard; the better

C. Harder; better

D. The harder; the better

46. ---The book is on Lily’s desk. _______it is hers. --- No, it _______ Lucy.

A. Maybe; is

B. Could; is

C. Maybe; belongs to

D. Might; belongs to

47. Wow! _______ beautiful Ping Liang is!

A. How a

B. What a

C. How

D. What

48. Can you find out the differences ____ the first picture____ the second picture?

A. among; /

B. between; at

C. between; and

D. among; an

49. Could you tell us ______?

A. where were they

B. when they will come back

C. which you choose on

D. What are the boys doing

50.---I will have a math test tomorrow. --- _____________!

A. Thank you

B. Well done

C. The same to you

D. Good luck Ⅳ. 用动词正确形式填空。(每空1分,共10分)

51. Please give this pencil to _______(she).

52. The little baby has two _______ (tooth) now. She is very lovely.

53. September 10th is _______ (teacher) Day every year in China.

54. China is a________ (develop) country.

55. I’m looking forward to ________ (hear) from you.

56. Wei Fen found it difficult _________ (learn) English.

57. If it ________(not rain ) tomorrow, we will go fishing .

58. The teacher often tells us ______ __ (not be) late for school.

59. His father has been ________ (die) for two years.

60. The heavy rain makes me ________ (feel) glad.

Ⅴ. 选择恰当的短语,并用其正确形式填空。(每空1分,共10分)

61. The picture ______ me ______ my school days.

62. On weekends I usually get _____ homework to do.

63.___________, no one passed the math exam in our class.

64. We should go to bed early, we shouldn’t.

65. I _ my great country.

66. He ____________ his students when he becomes a teacher.

67. She always with her friends on weekends last year.

68. We had a terrible vacation, it rained .

69. We shouldn’t smoke __________. It’s rude.

70. Don’t eat too much, or you will _________ weight.

Ⅵ. 句型转换(每空1分,共10分)

71. I study for a test by listening to tapes.(提问)

_____ do you _____ for a test?

72. They lock the door when they go out. (改为被动语态)

The door _______ _______ when they go out.

73. There is little water in the bottle, ______ _______ ? (反意疑问句)

74. You should shake hands when you meet someone. (同义句)

You ______ ________ to shake hands when you meet someone.

75. Is he a doctor? I wonder. (改为含宾语从句的复合句)

Iwonder ______ he ______ a doctor.

Ⅶ. 阅读理解(每题2分,共20分)

A

阅读下面这篇短文,读完后判断正(T) 误(F)。

Michael Jordan is the best basketball player in the world. He was born in New York, 1963. There are 5 children in his family. He is the fourth one. When he was a child, he was small but quick. So he played basketball very well.

When he was a high school student, he was the star of each game and he could score 40 points in a game. In 1984, he played in the US men’s Olympic Basketball Team. And later he played for the Chicago Bulls.

( ) 76. Michael Jordan is a football player.

( ) 77. Michael Jordan comes from America.

( ) 78. Michael Jordan can play basketball very well when he was a child.

( ) 79. Michael Jordan was strong when he was a child.

( )80. Michael Jordan played for the Chicago Bulls first, then for the US men’s Olympic Basketball Team.

B

A good memory is a great help in learning a language. Everybody learns his own language by remembering what he hears when he is a small child, and some children—like boys and girls who live abroad(国外)with their parents—seem to learn two languages almost as easily as one. In school it is not easy to learn a second language because the pupils have so little time for it, and they are busy with other subjects, too.

Our mind is rather like a camera, but it takes photos not only of what we see but of what we feel, hear, smell and taste. When we take a real photo with a camera, there is much to do before the photo is finished and ready to show to our friends. In the same way, there is much work to be done before we can keep a picture forever in our mind. Memory is the diary that we all carry about with us.

( ) 81. We usually begin to learn our own language by_______ it.

A. speaking

B. hearing

C. saying

D. teaching

( )82. If you have a good_______, you’ll have less difficulty in learning somet hing.

A. teacher

B. camera

C. memory

D. family

( ) 83. The children who live abroad with their parents can learn two languages more easily, because_______.

A. they are very clever

B. they have good teachers

C. they have more chances to use these languages.

D. they have a better life

( ) 84. ____ can take photos of what can be seen, felt, heard, smelt and tasted.

A camera B. Memory C.A diary D. A man's mind

( ) 85. Memory is______ that we keep in our mind and carry about.

A. the best diary

B. the best camera

C. a great help

D. a beautiful picture

B卷(50分)

Ⅷ. 完形填空(每题1分,共10分)

Franco is a waiter in New York City. He has one week __86__for summer holiday every year.

Last summer he__87__to take a trip to California. He didn’t want to go__88__plane. So he decided to take the train from New York to California.

The train __89__Penn Station in New York City on Monday at 10:00 p.m. Franco tried to sleep that night, __90__he couldn’t. He was too excited because he knew this trip was a wonderful idea. For five days, Franco didn’t __91__the train. He often had a __92__through the train and talked with the other passengers. Sometimes he walked between the cars(车厢)to get __93__fresh air. He had all his meals in the dining car.

Finally, at 2:45 p.m. on Friday, the train stopped in San Francisco. Franco was happy to leave the train. On Sunday, Franco took a flight back to New York. He __94__ out of the window of the airplane and imagined(想象) the desert, mountains, farms, and cities below. After a while, he closed his eyes and started to make plans for his __95__summer holiday.

86. A. in B. on C. off D. over

87. A. has decided B. decided C. decides D. deciding

88. A. by B. on C. in D. for

89. A. got B. left C. started D. arrived

90. A. but B. and C. then D. so

91. A. get down B. got out C get off D. get in

92. A. seat B. walk C. bed D. table

93. A. any B. every C. each D. some

94. A. saw B. looked C. noticed D. showed

95. A. first B. the last C. next D. the next

Ⅸ.阅读理解(每题2分,共20分)

(A)阅读短文,选出最佳答案

1970 was World Conservation(保护)Year. The United Nations wanted everyone to know that the world was in danger. They hoped something could be done.

Here is one example of the problem. At one time there were 1,300 kinds of plants, trees and flowers in Holland(荷兰),but now only 866 are left. The others have been destroyed(毁灭)by modern people and their science. We are polluting earth, air, water and everything around us. We can’t live without these things. If things go on like this, we shall destroy ourselves.

What will happen in the future? Perhaps it’s more important to ask “What must we do?” More and

more young people have known this. Many of them are helping to save our earth. For example, they plant trees. In a small town in the United States, a large group of girls cleaned the banks of 11 kilometers of their river. Young people may hear about conversation through a song called “No one’s going to change our world”. It was made by Cliff Gichard and other singers. The money from it will help to conserve tigers, elephants and pandas on the earth.

96. The United Nations hoped something could be done .

A. to conserve the world

B. to change the world

C. to develop the world

D. to destroy the world

97. Why aren’t there so many plants, trees and flowers in Holland now? Because .

A. people there didn’t need so many plants, trees and flowers.

B. people there want to destroy themselves

C. little conservation has been done there

D. people need more land to live on

98. How many kinds of plants, trees and flowers have been destroyed in Holland?

A. 1300

B.988

C.3166

D.434

99. We shall destroy ourselves if we go on .

A. Planting trees and flowers

B. polluting earth, air and water around us

C. saving the world

D. helping to conserve tigers, elephants and pandas

100. What must we do now according to the passage?

A. Save the world

B. Clean the banks of river

C. Sing songs

D. Get money

(B)任务型阅读

Failure is what often happens. It is everywhere in our life. Students may fail in exams, scientists may fail in their research work, and players may fail in competitions. (1)Although failure happens to everyone, different people’s attitudes towards(对于)failure are different..Some people don't think their failure is a very important thing at all. So they pay no attention to it. As a result, they will have the ______ failure later. Some people think themselves are fools and lose their hearts in everything after they get a failure. Then they their time and energy on useless things. At last, they may really be fools as they have thought.

Other people are quite different from these two kinds of people mentioned above. Instead of being hopeless and lost, they draw a lesson from every failure and become more experienced. After hard work, they will be successful in the end.

So we should draw a lesson from every failure and become more experienced.

101. 在横线上填入适当的单词________ ________(每空一词)

102. There are ________ attitudes towards failure according to the passage?

103. 将文中(1) 处译成汉语:

104. 从文中找出下列句子的同义句:At last, they will have success after they work hard. 105. 找出文中的中心句。

Ⅹ. 补全对话,每空一词(5分)

A: Why don’t you look happy, Rose?

B: 106 .I can hardly pass the exam ever y time. I don’t know what to do.

A: Don’t worry.107

B: No, I only read English before the exam.

A: 108 If you want to study English well, you must practice reading every day. May I know what you are going to do from now on?

B: I’d like to take you r advice and try to practice reading English every day. 109

A: All right, I’d like to. But in fact I also have some trouble with my English. Let’s help ea ch other.

B: OK! 110

Ⅺ. 书面表达(见答题卡,直接在答题卡上作答)(15分)

2015-2016学年度第一学期期末质量英语检测试卷答题卡

A卷(100分)

Ⅰ. 听力(每小题1分,共20分)

1-5. ___ ___ ___ ___ ___ 6-10.___ ___ ___ ___ ___

2020年甘肃省平凉市中考数学试卷-普通用卷

2020年甘肃省平凉市中考数学试卷 一、选择题(本大题共10小题,共30.0分) 1.下列实数是无理数的是() C. √9 D. √11 A. ?2 B. 1 6 2.若α=70°,则α的补角的度数是() A. 130° B. 110° C. 30° D. 20° 3.若一个正方形的面积是12,则它的边长是() A. 2√3 B. 3 C. 3√2 D. 4 4.下列几何体中,其俯视图与主视图完全相同的是() A. B. C. D. 5.下列各式中计算结果为x6的是() A. x2+x4 B. x8?x2 C. x2?x4 D. x12÷x2 6.生活中到处可见黄金分割的美.如图,在设计人体雕像时,使 雕像的腰部以下a与全身b的高度比值接近0.618,可以增加 视觉美感.若图中b为2米,则a约为() A. 1.24米 B. 1.38米 C. 1.42米 D. 1.62米 7.已知x=1是一元二次方程(m?2)x2+4x?m2=0的一个根,则m的值为() A. 1 B. ?1或2 C. ?1 D. 0 8.如图所示的木制活动衣帽架是由三个全等的菱形构成,根据实际需要可以调节AE 间的距离.若AE间的距离调节到60cm,菱形的边长AB=20cm,则∠DAB的度数是()

A. 90° B. 100° C. 120° D. 150° 9.如图,A是⊙O上一点,BC是直径,AC=2,AB=4, 点D在⊙O上且平分BC?,则DC的长为() A. 2√2 B. √5 C. 2√5 D. √10 10.如图①,正方形ABCD中,AC,BD相交于点O,E是OD的中点.动点P从点E 出发,沿着E→O→B→A的路径以每秒1个单位长度的速度运动到点A,在此过程中线段AP的长度y随着运动时间x的函数关系如图②所示,则AB的长为() A. 4√2 B. 4 C. 3√3 D. 2√2 二、填空题(本大题共8小题,共24.0分) 11.如果盈利100元记作+100元,那么亏损50元记作______元. 12.分解因式:a2+a=______. 13.暑假期间,亮视眼镜店开展学生配镜优惠活动.某款式眼镜的广告如下,请你为广 告牌填上原价. 原价:______ 元 暑假八折优惠,现价:160元 14.要使分式x+2 有意义,则x应满足条件______. x?1 15.在一个不透明的袋中装有若干个材质、大小完全相同的红球,小明在袋中放入3个 黑球(每个黑球除颜色外其余都与红球相同),摇匀后每次随机从袋中摸出一个球,

2018-2019学年(上)厦门市九年级数学质检卷

2018-2019学年(上)厦门市九年级质量检测 数 学 (测试时间:120分钟 满分:150分) 一.选择题(共10小题,每题4分,共40分) 1.计算-5+6,结果正确的是 A. 1 B. -1 C. 11 D.-11 2.如图1,在△ABC 中,∠C=90°,则下列结论正确的是 A. AB=AC+BC B.AB=AC ·BC C.AB 2=AC 2+BC 2 D.AC 2=AB 2+BC 2 3.抛物线6)1(22--=x y 的对称轴是 A. x=-6 B. x=-1 C. x=0.5 D.x=1 4.要使分式1 1-x 有意义,x 的取值范围是 A.x ≠0 B.x ≠1 C. x >-1 D. x >-1 5.下列事件是随机事件的是 A.画一个三角形,其内角和是360° B.投掷一枚正六面体骰子,朝上一面的点数小于7 C.射击运动员射击一次,命中靶心 D.在只装了红球的不透明袋子里,摸出黑球 6.图2,图3分别是某厂机床十月份第一天和第二天生产零件的 统计图,与第一天相比,第二天六台机床生产零件平均数与方差 的变化情况是 A.平均数变大,方差不变 B.平均数变小,方差不变 C.平均数不变,方差不小 D.平均数不变,方差变大 7.地面上一个小球被推开后笔直前行,滑行距离s 与时间t 的函数关系 如图中部分抛物线所示(p 点为抛物线的顶点),则下列说法正确的是 A.小球滑行6秒停止 B.小球滑行12秒停止 C.小球滑行6秒滑到起点 D.小球滑行12秒滑到起点 8.在平面直角坐标系xOy 中,已知A (2,0),B (1,-1),将线段OA 绕O 点逆时针旋转,旋转角为α(0°<α<135°),记点A 的对应点为A1,若点A1与B 的距离为6,则α为 A. 30° B.45° C. 60° D.90°

人教版九年级英语期中考试题(含答案)

一、单项选择(15分) ( )1.---How do you study _______a test? ----I study _______reading the textbook. A. for ; for B. for ; by C. by ; for D .by ; by ( )2. I don't know _______.Can you tell me________? A. how swim; what to do B. how to swim ; what to do it C. how to swim; what to do D. what to swim; how to do ( )3. Liu Xiang is one of ______ runners in the world. A. famous B. more famous C. the most famous ( )4. My brother spends too much time ______computer games. A. to play B. play C. plays D.playing ( ) 5. If I ____ ten million dollars, I ____travel around the world. A. have; will B. had; will C. had; will D .had; would ( )6.The young trees should ______well as often as possible A.be water B. watered C. watering D. be watered ( )7.He pretended ________me when he walked by. A. not see B. not to see C. don't see D. to not see ( )8._________that river ________very clean? A. Did ;use to B. Did ;use to be C. Does ;used to D. Does ;use to be ( )9.You__________to school so early. It opens at 7. A. needn't come B. don't need come C. needn't coming D. needn't to come ( )10.----How many people will come to Beijing next year? ----It's hard to say. _________people , I think. A. Million of B. Millions of C. Three millions D. Three millions of ( )11.-----Whose guitar is this? -----Susan plays the guitar. It must _______. A. belong to her B. belong her C. belong to hers D. belong hers ( )12.Do you like music ____makes you excited? A. that B. what C. who D. it ( )13.We prefer ________at the party rather than______. A. to sing; dance B. to sing; dancing C. sing; to dance D. sing ;dance ( )14.------Where would you like to visit? ------ I'd like to visit____ A. warm somewhere B. warm anywhere

平凉历史文化

平凉历史文化 一、平凉历史 平凉市位于陇山东麓,泾河上游,是关中西去北上的古道要冲;又依六盘三关之险,历来是兵家必争之地。历史悠久,建制变革较大。 公元前二七二年,秦昭王灭义渠戎,置陇西、北地、上郡,平凉入秦的版图,属北地郡。 汉武帝元鼎三年(公元前一一四年)分北地郡置安定郡(治所在高平,今宁夏回族自治区固原县境),平凉全境改属安定郡;东汉并泾阳入朝那,平凉属凉州刺史部安定郡的朝那、乌氏二县。 三国时曹魏于郡上设州,此地属雍州安定郡,恢复了泾阳县。西晋又废泾阳县,新置都卢县,平凉市境东部属朝那县,西部属都卢县。 十六国南北朝是最乱的时期,平凉全境先后为前赵、后赵、前秦、后秦、夏、北魏、西魏、北周所领有,建制变化很大。前秦永兴二年(公元三五八年)苻坚欲进攻前凉,置平凉郡(初治高平镇,后治鹑阴),取平定凉国之意,平凉之名始见于史册。以后,前秦苻坚曾以平凉为根本,向后秦反攻:夏赫连定曾即皇帝位于平凉。北周武帝建德元年(公元五七二年)于今市境的西北部治平凉县,属长城郡。是平凉市建制的开始,距现在一千四百一十年。 隋代,开皇三年(公元五八四年)废郡置州,平凉市属原州。大业初又废州置郡,平凉市属平凉郡。

唐武德元年(公元六一八年)复置原州,治平高。天宝元年(公元七四二年)再改平凉郡,旋复为原州,平凉市属原州。贞元七年(公元七九一年)泾原节度使刘昌筑平凉城扼弹筝峡口,奠定今平凉市城址,距现在一千一百九十一年。宪宗元和四年(公元八零九年)移行渭州于平凉,平凉市废。广明初复陷吐蕃,中和四年收复为渭州治。 唐末,李茂贞据凤翔称岐王,渭州属于岐,历后梁。后唐明宗天成元年(公元九二六年)灭岐,渭州属后唐。后唐清太二年(公元九三五年)以原平凉市的安国、耀武二镇复置平凉市,属泾州;后晋天福五年(公元九四零年)改属渭州。宋代,仍为渭州治所,属泾原路,为泾原路经略安抚使驻地,与西夏接壤,是当时的军事重镇;至大观二年,共领泾州、原州、渭州、西安州、会州、德顺军、镇戎军、怀德军等五州三军,遂代泾州、原州成为这一地区的政治军事中心。徽宗政和七年(公元一一一七年)置平凉军,设节度使。金代开六盘道,大定二十七年(公元一一八七年)始置平凉府,辖五县,属凤翔路。平凉市为府治所。 元代仍以平凉为府,辖三县,属巩昌总帅府,并潘原县入平凉市,平凉市仍为府治所。自此,平凉市的辖境再未有大的变动。明代的平凉府辖三州七县,属陕西布政使司关内道;平凉市仍为府治所。 清初沿明制,属陕西布政使司。康熙八年(公元一六六九年)改属甘肃布政使司,平凉仍为府,府上设道:初为平庆泾固化道,同治末改为平庆泾固化盐法兵备道,平凉县为道、府治所。

2018-2019学年(上)福建厦门市九年级质量检测化学试题及答案(word版)-精选.pdf

2018-2019学年(上)厦门市九年级质量检测 化学 (试卷满分:100分考试时间:60分钟) 可能要用到的相对原子质量:H 1 C 12 N 14 0 16 F 19 Cl 35.5 K 39 Mn 55 第Ⅰ卷选择题 第Ⅰ卷共l0题。每题3分,共30分。在每题给出的四个选项中,只有一个选项符合题目要求。 1.下列古代文明或工艺一定包含化学变化的是 A.用粮食酿酒 B.用石块建长城 C.用石刀刻甲骨文 D.用指南针引航 2.“绿水青山就是金山银山”。不违背该理念,可直接排放的物质是 A.氮气 B.二氧化硫 C.固体粉尘 D.工业废水 3.下列实验操作不规范的是 A.滴加液体 B.取用固体粉末 C.点燃酒精灯 D.闻气味 4.每年5月12日是我国的“防灾减灾日”。下列火灾现场处理方法错误的是 A.身上着火不可乱跑,要就地打滚使火熄灭 B.逃生路线被火封住,应退回室内,打开所有门窗通风 C.处理燃气罐着火:先用浸湿的被褥盖灭,迅速关闭阀门,再转移到安全地方 D.用湿毛巾捂住口鼻,低姿行走到安全通道 5.锌锵黄(ZnCrO4)常用于制防锈涂料。锌铬黄中铬(Cr)元素的化合价为 A.+6 B.+5 C.+2 D.+1 6.西达本胺是一种抗癌物质.其化学式为C22H19FN4O2.下列说法正确的是 A.西达本胺属于混合物 B.西达本胺由48种元素组成 C.一个西达本胺分子中含有一个氧分子 D.西达本胺中碳元素的质量分数最大 7.下列操作能达到实验El的的魁 实验目的实验操作 A 除去CO2中少量的CO 点燃 B 除去氧化铜粉末中的炭粉隔绝空气,充分灼烧 C 比较人体吸入空气和呼出气体中氧气的含量分别用集气瓶收集两种气体,将带有火星的木条伸入其中 D 鉴别生石灰和石灰石粉末分别取样于试管中,加少量水,用手触摸管壁 8.在宏观、微观和符号之间建立联系是化学学科的特点。高温下,甲和乙反应生成丙和丁,结合表中信息判断下列说法正确的是 A.甲的化学式为CO2B.保持丙化学性质的最小粒子为碳原子和氧原子 C.反应物和生成物中都有化合物D.反应生成丙与丁的分子个数比为2:1 9.用下图所示装置测定空气中氧气的含量。在玻璃管中放入过量铜粉,管中的空气体积为50 mL,将活塞拉至30 mL刻度处的注射器和瘪的气球接在玻璃管的两端,点燃酒精灯,反复推拉注射器和挤压气球,待充分反应后,冷却至室温,将气球中的气体全部挤入玻璃管,此时注射器的活塞停在14mL刻度处。

人教版九年级英语试题

Unit 6 When was it invented? 一、单词默写。 1.样式,款式n.__________________ 2. 项目,工程n.__________________ 3.高兴,愉快n. __________________ 4. 每日的,日常的adj. _____________ 5.提到,说到v. ___________________ 6.列表,清单v./n.__________________ 7. 几乎,差不多adv._______________ 8. 煮沸,烧开v. _________________ 9.保持不变,剩余v._______________ 10. 气味n. 闻起来v.______________ 11. 国家的,民族的adj.____________ 12. 贸易,交易v./n.______________ 13.疑惑,疑问n./v. ________________ 14. 冰箱n.__________________ 15. 低的,矮的adj._________________ 16. 某人,重要人物pron./n. __________ 17.翻译v._______________________ 18. 锁上,锁住v._________________ 19. 地震n._____________________ 20.突然地adj.____________________ 21.钟,铃n.____________________ 22.音乐的,有音乐天赋的adj.___________ 23. 器械,工具n._______________ 24.加拿大人的,加拿大人adj./n._________ 25.分开,分散v.________________ 26. 篮,筐n.__________________ 27.英雄,男主角n._______________ 二、短语默写。 1.这是我的荣幸(thank you的回答)_________________ 很乐意________________ 2.如此伟大的发明________________ 3.在日常生活中___________________ 4.有道理____________________ 5.它提到…_______________________ 6.被广泛使用____________________ 7.在那时_______________________ 8.变得受欢迎____________________ 9. 据说_________________________ 10.偶然的__________________ 11.人们相信_____________________ 12. 第一个做某事的人______________ 13. 掉入_______________________ 14.一种很好的味道____________________ 闻起来很好__________________ 15.最…之一____________________ 16.被用来做…______________________ 17. 直到…才…_________________18.发生(无被动)____________________ 19. 毫无疑问_____________________20.少于/多于______________________ 21. 5000年前_____________________ 22. 成千上万________________________

甘肃 - 平凉目前已开通的手机号段

甘肃 - 平凉目前已开通的手机号段 130联通号段 (共5个) 计算得出平凉联通130号段共有超过5万个手机号(计算方式:号段数*万门 5*10000=50000) ? 1303417 ? 1303418 ? 1304299 ? 1308599 ? 1309933 131联通号段 (共6个) 计算得出平凉联通131号段共有超过6万个手机号(计算方式:号段数*万门 6*10000=60000) ? 1311933 ? 1311947 ? 1313933 ? 1315018 ? 1319587 ? 1319589 132联通号段 (共4个) 计算得出平凉联通132号段共有超过4万个手机号(计算方式:号段数*万门 4*10000=40000) ? 1320933 ? 1322042 ? 1323933 ? 1326984 133电信CDMA手机号码 (共5个) 计算得出平凉电信133号段共有超过5万个手机号(计算方式:号段数*万门 5*10000=50000) ? 1330933 ? 1332130 ? 1335933

门 0*10000=00000) 135移动电话号码号段 (共2个) 计算得出平凉移动135号段共有超过2万个手机号(计算方式:号段数*万门 2*10000=20000) ? 1351903 ? 1351933 136移动号段 (共6个) 计算得出平凉移动136号段共有超过6万个手机号(计算方式:号段数*万门 6*10000=60000) ? 1362933 ? 1364933 ? 1367933 ? 1368933 ? 1368946 ? 1368947 137移动手机号码号段 (共1个) 计算得出平凉移动137号段共有超过1万个手机号(计算方式:号段数*万门 1*10000=10000) ? 1373933 138移动号段 (共11个) 计算得出平凉移动138号段共有超过11万个手机号(计算方式:号段数*万门 11*10000=110000) ? 1380933 ? 1383030 ? 1383031 ? 1383032 ? 1383033 ? 1383034 ? 1383035 ? 1383036 ? 1383037

甘肃省平凉市崆峒区2018~2019学年七年级上学期期末语文试题

甘肃省平凉市崆峒区2018-2019学年七年级上学期期末语文 试题 学校:___________姓名:___________班级:___________考号:___________ 一、字词书写 1.根据拼音写汉字 成长是一件最fēnɡ ráo(________)的事情.因为成长,今天的禾苗是鲜嫩的,明天就会变成金黄;因为成长,今天的玫瑰是含苞的,明天就会jiāo yàn(______)绽放;因为成长,今天的小鸟是稚嫩的,明天就会áo xiáng(________)蓝天。 2.请你写出四个含“狼”的成语。 二、选择题 3.请选出下列词语书写完全正确的一项() A.急燥热忱人迹罕至浑为一谈 B.眩耀禁固神采弈弈畏罪浅逃 C.诀别憔悴咄咄逼人花团锦簇 D.分岐莅临各得其所神通光大 4.下列句中加点词语运用正确的一项是() A.又找到一条通向山顶的捷径了,真是绝处逢生 ....啊! B.颁奖典礼上,女士们打扮得花枝招展 ....的,成了一道亮丽的风景线。 C.王伟是五(4)班的班长,在班里德高望重 ....,同学们都很喜欢他。 D.他奋不顾身抢救落水儿童的事迹真是骇人听闻 ....。 5.下列句子中标点符号使用有误的一项是() A.“满招损,谦受益”这句格言,流传到今天至少有两千年了。 B.语言,人们用来抒情达意;文字,人们用来记言记事。 C.每一朵盛开的花就像是一个小小的张满了的帆,帆下带着尖底的舱,船舱鼓鼓的;又像一个忍俊不禁的笑容,就要绽开似的。 D.他看上去才十七、八岁,一副有气无力的样子。 6.请选出下列句子没有语病的一项() A.秋天的北京是美丽的季节。 B.通过开展校园防火消防演练,让同学们的安全意识更强了。 C.会不会用心观察,能不能重视积累,是提高写作水平的基础。

2017—2018学年(上)厦门市九年级质量检测数学试题及参考答案

2017—2018学年(上)厦门市九年级质量检测 数 学 (试卷满分:150分考试时间:120分钟) 班级 姓名 座位号 一、选择题(本大题有10小题,每小题4分,共40分.每小题都有四个选项,其中有且只有一个选项正确) 1.下列算式中,计算结果是负数的是( ) A .(2)7-+ B .|1|- C .3(2)?- D .2(1)- 2.对于一元二次方程2210x x -+=,根的判别式24b ac -中的b 表示的数是( ) A .2- B .2 C .1- D .1 3.如图1,四边形ABCD 的对角线AC ,BD 交于点O , E 是BC 边上的一点, 连接AE ,OE ,则下列角中是△AEO 的外角的是( ) A .∠AEB B .∠AOD C .∠OEC D .∠EOC 4.已知⊙O 的半径是3,A ,B ,C 三点在⊙O 上,∠ACB = 60°,则) AB 的长是( ) A .2π B .π C .32π D .12 π 5.某区25位学生参加魔方速拧比赛,比赛成绩如图2所示, 则这25个成绩的中位数是( ) A .11 B .10.5 C .10 D .6 6.随着生产技术的进步,某厂生产一件产品的成本从两年前的100元下降到现在的64元,求年平均下降率.设年平均下降率为x ,通过解方程得到一个根为1.8,则正确的解释是( ) A .年平均下降率为80% ,符合题意 B .年平均下降率为18% ,符合题意 C .年平均下降率为1.8% ,不符合题意 D .年平均下降率为180% ,不符合题意 7.已知某二次函数,当1x <时,y 随x 的增大而减小;当1x >时,y 随x 的增大而增大,则该二次函数的解析式可以是( ) A .22(1)y x =+ B .22(1)y x =- C .22(1)y x =-+ D .22(1)y x =-- 8.如图3,已知A ,B ,C ,D 是圆上的点,)) AD BC =,AC ,BD 交于点E , 则下列结论正确的是( ) A .AB = AD B .BE = CD C .AC = BD D .BE = AD 9.我国古代数学家祖冲之和他的儿子发展了刘徽的“割圆术”(即圆的内接正多边形边数不断增 加,它的周长就越接近圆周长),他们从圆内接正六边形算起,一直算到内接正24576边形,将圆周率精确到小数点后七位,使中国对圆周率的计算在世界上领先一千多年.依据“割圆术”,由圆内接正六边形算得的圆周率的近似值是( ) A .2.9 B .3 C .3.1 D .3.14 10.点(,)M n n -在第二象限,过点M 的直线y kx b =+(01)k <<分别交x 轴,y 轴于点A ,B .过 点M 作MN ⊥x 轴于点N ,则下列点在线段AN 上的是 A .((1),0)k n - B .3((),0)2k n + C .(2)(,0)k n k + D .((1),0)k n + E O D C B A 图 1 图2 学生数 正确速 拧个数 A B D C E 图3

人教版九年级英语试题及答案

灵璧县杨疃中学九年级英语摸底考试试卷 Ⅰ..单项填空(共20小题;每小题1分,满分20分) 1. --What is Miss Gao's favorite________? --She is always in pink. Don't you know? A. colour B. book C. song D. movie 2. You __ drive your car so fast. It's very dangerous. A. wouldn't B. shouldn't C. couldn't D. mightn't 3. -- Would you like some milk? --________. A. Yes, please B. The same to you C. Help yourself D. My pleasure 4. -- ________ can you finish this English examination? -- In about one and a half hours. A. How far B. How often C. How soon D. How long 5. Smile to the world, ________ the world will smile back to you. A. nor B. but C. or D. and 6. -- I can't find David. Where is he? -- He ________ for tomorrow's competition at home. A. prepares B. is preparing C. has prepared D. prepared 7. Mrs. King put a coat ________ the sleeping girl to keep her warm. A. over B. with C. behind D. beside 8. --I am a little hungry, Mom. --There are some cakes on the plate. You can take ________. A. it B. one C. that D. this 9. I will meet Jane at the station. Please ________ what time she will arrive. A. count B. choose C. check D. catch 10. -- Tony, ________ are you in such a hurry? -- The meeting will start soon. I don't want to be late. A. where B.how C. when D. why 11. -- What was Jim wearing at the party? -- Nothing ________. He was in his usual shirt and jeans. A. special B. simple C. important D. interesting 12. -- It will be my turn. I feel a little nervous. --________ You can make it! A. Congratulations! B. Take it easy. C. kook out! D. Have a good time. 13. It is helpful to ________ a good habit of reading in language learning. A. take B. show C. develop D. match 14. The rivers will become dirtier and dirtier ______ we take action to protect them. A. since B. if C. until D. unless 15. -- Our school bus will leave at 8 o'clock tomorrow. Don't be late. -- OK. I will be there ten minutes________. A. sooner B. slower C. faster D. earlier 16. Thanks to the Internet, different kinds of information ________ in a short time. A. can be learned B. has been learned C. can learn D. has learned 17. I'm surprised to hear from her. ________, we last met ten years ago. A. On one hand B. That is to say C. Believe it or not D. In other words 18. The people in Ya'an have met lots of difficulties, but they haven't ________ hope. A. picked up B. given up C. looked for D. waited for 19. I still remember the college and the teachers ________ I visited in London years ago. A. what B. who C. that D. which 20. --TV says there will be a storm tomorrow. -- ________I planned to go climbing with my classmates. A. I hope so B. I'm afraid so C. Sounds good D. Bad luck Ⅱ.完形填空(共20小题;每小题分,满分30分) A Mr. and Mrs. Green were very worried about their son, Leo. He seemed to be dumb (哑的) 21 he was normal in every other way. Mr. and Mrs. Green tried everything to get him to 22 , but with no success. When Leo was six years old, the best doctors in the town 23 him carefully, but could find nothing wrong. And he seemed to be smart. It was just that he 24 spoke. "There might be something wrong with his 25 , and he doesn't know he's able to speak," one doctor said. "But he can read and write," said Mr. Green. "We've written him notes, telling him that he can speak." "It's certainly very 26 ," another doctor said. "Perhaps he'll be able to speak some day." 27 passed. Leo went to university. But he did not speak a 28 word. Then one day, Leo was having a meal with his parents. Without any warning, he looked up from his 29 and said, "Pass me the salt, please." Mr. and Mrs. Green were excited. "You spoke! You spoke!" they cried, "Why have you 30 so long to speak?" "I didn't have anything to say," he said. "Until now everything was perfect. But you forgot to put salt in these potatoes." 21. A. because B. when C. though D. before 22. A. speak B. walk C. play D. laugh 23. A. taught B. found C. examined D. asked 24. A. never B. often C. usually D. always 25. A. back B. hair C. face D. mind 26. A. unfair B. strange C. noisy D. quiet

甘肃省平凉市三年级上册数学期末测试卷

甘肃省平凉市三年级上册数学期末测试卷 姓名:________ 班级:________ 成绩:________ 亲爱的同学,经过一段时间的学习,你们一定学到不少知识,今天就让我们大显身手吧! 一、基础知识 (共19题;共23分) 1. (3分)(2018·浙江模拟) 请估一估,这份毕业试卷的正面面积大约是13________(填单位名称)。 2. (1分)填空 3500kg=________t1000m=________km 3时45分=________时 6.80 =________ 2000mL=________L 3.5公顷=________ 3. (3分) (2020三上·隆昌期末) 如图阴影部分占整个图形的________,再涂上________块,涂色部分就占. 4. (1分) 7000米=________千米 3吨=________千克 1米﹣6分米=________分米 1吨﹣200千克=________千克 3时=________分 4分=________秒 180秒=________分. 5. (1分)有12个桃子,平均放在6个盘子里面,每个盘子里面放________个桃子,每个盘子里的桃子占桃子总数的________。 6. (1分) (2017三上·罗湖期末) 晚上11时是________时; 13时45分是下午________。

7. (1分) (2019三上·京山期中) 小华每天放学的时间是4:50,在路上用了15分,他回到家的时间是________。 8. (1分) 1米的是________米,写成小数是________米;131克是________千克,写成小数是________千克。 9. (1分) (2019二上·江干期末) 妈妈准备从左面3种不同的物品中买两种送给我,一共有________种不同的送法。 10. (1分)有一个长方形的周长与一个正方形的周长相等,长方形长8分米,宽6分米.求正方形的边长.________ 11. (1分)三(1)班在运动会上,报名参加赛跑的有33人,报名参加跳远的有16人,报名参加两项运动项目的有10人,没有人一项体育运动都不参加,那么三(1)班有________人,只参加赛跑的有________人。 12. (1分) (1)根据信息把下面的线段图补充完整。 (2)爸爸今年多少岁? (3)再过多少年,儿子的年龄就和爸爸现在一样大? 13. (1分)要使2□9×4的积是四位数,□里最小填()。 A . 3 B . 4 C . 5

平凉市情概况

平凉市情概况 平凉市地处陕、甘、宁三省(区)交汇处,东邻陕西咸阳,西连甘肃定西、白银,南接陕西宝鸡、甘肃天水,北倚宁夏固原、甘肃庆阳,是甘肃东部重要的区域性中心城市和承接中东部省区产业转移与开放开发的“东大门”。全市辖泾川、灵台、崇信、华亭、庄浪、静宁6县和崆峒区,总面积1.1万平方公里,总人口224万人,以回族为主的少数民族占总人口的7.3%。 区位优势明显。平凉位于西安、兰州、银川三大省会城市几何中心,是古“丝绸之路”北线东端之重镇,素有“陇上旱码头”之称。平凉不仅是西北地区重要的公路枢纽,也是欧亚大陆桥第二通道的重要中转站,312国道横穿全境,宝中铁路纵贯南北,初步形成了以国道、省道为主干,县乡道路为支线的公路网络。随着平定高速、银武高速、西平铁路、天平铁路的陆续建设,平凉将成为贯通西兰银三条高速、三条铁路的重要交通枢纽,区位优势将得到进一步发挥。 文化底蕴深厚。这里是先民们在黄河中上游繁衍生息、走向文明的摇篮,是中华民族重要的发祥地之一。早在20—30万年前,人类的祖先就活动在这片土地上,3000多年前,周人的先祖就在泾河流域创造了先进的农耕文化,开启了农业文明的曙光。公元358年,前秦王苻坚在这里厉兵秣

马欲平定前凉,始以平凉之名置郡。境内有仰韶、齐家、商周等各个时期的文化遗址465处,全国重点文物保护单位5个,省级重点文物保护单位59个,馆藏文物3万多件,其中国家一级文物196件。出土于泾川县大云寺的佛祖舍利金银棺、灵台县的西周青铜器和南宋货币银合子等文物被誉为“中华文物之最”。在众多的历史文化遗迹中,尤以中华道教第一山——崆峒山、人文开元第一祖伏羲氏诞生地——古成纪、天下王母第一宫——回中宫、神州祭灵第一台——古灵台等闻名于世。在漫长的历史长河中,这里吸引了众多彪炳史册的著名人物,发生了许多影响深远的重大事件,人文初祖轩辕黄帝亲诣崆峒山,向广成子请教修身治国之道;周穆王“八骏日行三万里”,与西王母相会于回中;秦始皇、汉武帝先后西巡,登崆峒而揽胜;秦王李世民泾州大捷,展雄才而凯旋;李白、杜甫情系崆峒,佳作传世;成吉思汗驻跸陇山,建有寝宫;明代韩王就藩平凉,传十一世;名道张三丰访道修炼,历时五年。近代以来,左宗棠、林则徐、谭嗣同、冯玉祥、张学良、于右任等爱国人士纷至沓来,留下了历史的印迹,特别是毛泽东率领的中国工农红军经过平凉大地,播撒了革命的火种。地灵人杰的平凉还孕育了世界文化名人、中华针灸学鼻祖皇甫谧,唐代著名政治家、文学家牛僧孺,南宋抗金名将吴玠、吴璘、刘锜,明代“嘉靖八才子”之一赵时春,清初名臣慕天颜等一大批文韬武略杰出人

平凉市崆峒区广播电视事业发展十二五发展规划

平凉市崆峒区广播电视事业发展“十二五”发展规划 广播电视是党和政府联系干群的桥梁,是党的路线、方针、政策的宣传阵地和先进文化传播的主要载体。不断提高广播电视人口覆盖率,让广大人民群众听好广播看好电视是广电工作的根本任务。为全面贯彻落实党中央、国务院、国家广电总局关于广电工作的重要指示和工作部署,更好的体现广播电视工作的各项职能。现根据我区实际,特编制崆峒区广播电视“十二五”发展规划(2010年—2015年)。 一、崆峒区广播电视发展现状 “十一五”期间是我市广播电视事业快速发展的重要时期。在 区委、区政府的正确领导下,在区直有关部门和各乡(镇)的共同努力下,我区广播电视工作取得了显著成绩,创造了良好的社会效益和经济效益,促进了全区政治、经济、文化建设。具体表现为:一是围绕中心,服务大局,电视新闻宣传唱响了主旋律,坚持了正确的舆论引导方向,圆满地完成了各项工作和任务,舆论引导能力和业务水平不断提高。在坚持办好《崆峒新闻》的基础上,实现了重大新闻当天采访当天播出,其它栏目做新做精。二是广播电视安全播出工作按照“保畅通、守底线”的要求,确保了重大节日、重大活动和重点时段的安全播出零事故,安全播出与安全保障能力得到显著提高。三是大力实施广播电视“村村通”工程,2006年建成了无线数字电视传输平台,发展数字电视用户5000多户。向中央、省积极争取广播电视村村通卫星直播设备2.2万套,将于2010年底全部安装到户。 在取得上述成绩的同时,我区广播电视发展中也存在一些矛盾和问题:一是广电局、广播电视台、广电网络中心办公条件异常简陋,设备设施相对落后。二是广播电视台由于资金紧张,制约了公益性宣传工作上水平、上档次。三是广播电视节目内容和水平还不能很好满足广大人民群众日益增长的多样化精神文化需求。四是城乡广播电视发展不协调,农村无线电视用户发展明显滞后,入户率太低。五是广播电视人才队伍的整体素质与广播电视发展的需求之间差距较大。 二、指导思想 坚持以邓小平理论和“三个代表”重要思想为指导,深入贯彻落实科学发展观,服从和服务于区委、区政府的工作大局。立足于二十一世纪广播电视信息产业的发展走向,以市场经济为导向,以高新技术为依托,以两个效益为目的,不断深化广播电视体制改革,坚持政治性、公益性、经济性相统一的原则,精办广播电视节目,扩大广播电视有效覆盖率,加大广播电视信息化和现代化进程。促进我区经济与社会、城乡区域之间的协调发展,为全区社会发展和经济建设服务。 二、发展目标 “十二五”期间广播电视宣传工作将始终围绕党和政府各个时期的工作重点,牢牢把握正确的舆论导向,弘扬时代主旋律,努力在宣传内容上求“深”,在宣传手段上求“新”,在宣传质量上求“精’,在对外宣传上求“强”。增强广播电视宣传的吸引力,营造我区经济和社会全面发展的良好氛围。按照“政治强、业务精、纪律严、作风正”的要求,通过引进、培养、提高等方式,培养一批名编辑、名记者、名主持。在事业发展上进一步扩大业务范围,完成崆峒区广播电视台制作播出系统的数字化改造,加大农村地区无线数字电视用户的发展,提高农村无线数字电视入户率,进一步完善“村村通”工程的管理体制,实现卫星直播电视对无线数字电视的科学、有效补充;要

2018-2019学年厦门市九年级上数学质量检测试卷

2018—2019学年(上)厦门市九年级质量检测 数 学 (试卷满分:150分 考试时间:120分钟) 一、选择题(本大题有10小题,每小题4分,共40分.每小题都有四个选项,其中有且只有一个选项正 确) 1.计算-5+6,结果正确的是( ) A .1 B .-1 C .11 D .-11 2.如图1,在△ABC 中,∠C =90°,则下列结论正确的是( ) A .A B =A C +BC B .AB =AC ?BC C .AB 2=AC 2+BC 2 D .AC 2=AB 2+BC 2 3.抛物线y =2(x -1)2-6的对称轴是( ) A .x =-6 B .x =-1 C .x =1 2 D .x =1 4.要使分式1 x -1 有意义,x 的取值范围是( ) A .x ≠0 B .x ≠1 C .x >-1 D .x >1 5.下列事件是随机事件的是( ) A .画一个三角形,其内角和是360° B .投掷一枚正六面体骰子,朝上一面的点数小于7 C .射击运动员射击一次,命中靶心 D .在只装了红球的不透明袋子里,摸出黑球 6.图2,图3分别是某厂六台机床十月份第一天和第二天生产零件数的统计图.与第一天相比,第二天六台机床生产零件数的平均数与方差的变化情况是( ) A .平均数变大,方差不变 B .平均数变小,方差不变 C .平均数不变,方差变小 D .平均数不变,方差变大 图1 图2 图3 m -m m +机床序号 生产的零件数 机床序号 生产的零件数

7.地面上一个小球被推开后笔直滑行,滑行的距离s 与时间t 的函数关系如图4中的部分抛物线所示(其 中P 是该抛物线的顶点),则下列说法正确的是( ) A .小球滑行6秒停止 B .小球滑行12秒停止 C .小球滑行6秒回到起点 D .小球滑行12秒回到起点 8.在平面直角坐标系xOy 中,已知A (2,0),B (1,-1),将线段OA 绕点O 逆时针旋转,旋转角为 α(0°<α<135°),记点A 的对应点为A 1,若点A 1与点B 的距离为6,则α为( ) A .30° B .45° C .60° D .90° 9.点C ,D 在线段AB 上,若点C 是线段AD 的中点,2BD >AD ,则下列结论正确的是( ) A .CD <AD -BD B .AB >2BD C .BD >AD D .BC >AD 10.已知二次函数 y =ax 2+bx +c (a >0)的图象经过(0,1),(4,0).当该二次函数的自变量分别取x 1,x 2 (0<x 1<x 2<4)时,对应的函数值是y 1,y 2,且y 1=y 2.设该函数图象的对称轴是x =m ,则m 的取值范围是( ) A .0<m <1 B .1<m ≤2 C .2<m <4 D .0<m <4 二、填空题(本大题有6小题,每小题4分,共24分) 11.投掷一枚质地均匀的正六面体骰子,投掷一次,朝上一面的点数为奇数的概率是 . 12.已知x =2是方程x 2+ax -2=0的根,则a = . 13.如图5,已知AB 是⊙O 的直径,AB =2,C ,D 是圆周上的点,且∠CDB =30°,则BC 的长 为 . 图4 图5 s (米) A

相关文档
最新文档