2019年山西中考百校联考试题1

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2019山西中考模拟百校联考试卷(一)物理试卷及答案解析

2019山西中考模拟百校联考试卷(一)物理试卷及答案解析

山西中考模拟百校联考试卷(一) 物理部分二、选择题(每小题 3 分,共 30 分,在每小题给出的四个选项中,只有一项符合题目要求) 在下列每小题给出的四个选项中,只有一个符合要求,请选出并填入下表相应位置. 题号 答案 11. 如图所示是我国空军某团训练空中加油的场景,飞在前面的大飞机是加油机,后面的两架 飞机是歼-10 战斗机。

网上资料显示小飞机(歼-10)的翼展 AB 宽约 10m,请估测两架小飞机 BB′之间的距离约是 A. 200m B. 20m C. 2m D. 0.2m 1 2 3 4 5 6 7 8 9 1012. 如图是小华制作的水瓶琴, 并用它为同学们演奏了乐曲 《小星星》 , 下列说法正确的是 ()A. 水瓶琴的声音不是由震动产生的 B. 发出“1,2,3,4,…”的声音是响度不同 C. 水瓶琴的声音是通过空气传入人耳的 D. 演奏声对于上无声自习的同学不是噪声13.天然气作为清洁能源已经进入千家万户,利用天然气烧水,下列解释正确的是 A. 天然气的分子不做无规则运动,所以无气味 B. 天然气燃烧越充分,热值就越大 C. 壶内水温度升高的过程,其内能增大 D. 水沸腾壶盖被顶起,机械能转化为内能114. 关于下图中光学现象的描述或解释正确的是甲乙丙丁A. 甲图中小孔成的是倒立的虚像 B. 乙图中凹透镜可以矫正近视眼 C. 丙图中水中的筷子向下偏折是光的折射现象 D. 丁图中漫反射不循序光的反射定律 15.焦耳 24 岁时,首先把电阻丝放入玻璃管内,做成一个电热器。

然后把电热器放入一个玻璃 瓶中,瓶中装有已知质量的水。

给电热器通电并开始计时,从插在水中的温度计可随时观察 到水温的变化。

同时,他用电流计测出电流的大小。

焦耳把这种实验做了一次又一次,获取 大量数据归纳得出焦耳定律。

下列有关说法正确的是( A. 焦耳定律只适用于电阻丝的电路 B. 焦耳在实验时用水吸收的热量来替代电阻丝产生的热量,是用了控制变量法 C. 焦耳借助玻璃管做成电热器是因为玻璃是导体 D. 焦耳实验得到电流产生的热量与电流的二次方、电阻、通电时间成正比 )16.用一个焦距为 20cm 的放大镜来观察邮票细节,放大镜与邮票的距离应 A.大于 40cm C.等于 20cm B.在 20cm 与 40cm 之间 D.小于 20cm17.2018 年 11 月 19 日,我国在西昌卫星发射中心用长征三号乙运载火箭,以“一箭双星”方式 成功发射第四十二、四十三颗北斗导航卫星,为准确导航定位再立新功。

2019山西中考模拟百校联考(一)答案·数学

2019山西中考模拟百校联考(一)答案·数学
甲 甲 乙 丙 丁 戊 ( 甲,乙) ( 甲,丙) ( 甲,丁) ( 甲,戊) ( 乙,丙) ( 乙,丁) ( 乙,戊) ( 丙,丁) ( 丙,戊) ( 丁,戊) 乙 ( 乙,甲) 丙 ( 丙,甲) ( 丙,乙) 丁 ( 丁,甲) ( 丁,乙) ( 丁,丙) 戊 ( 戊,甲) ( 戊,乙) ( 戊,丙) ( 戊,丁)
1 1 ∠ABC,∠QCD= ∠ACD. !!!!!!!!!!!!!!!! 4分 2 2
∵∠QCD是△BCQ的外角, ∴∠QCD=∠QBC+∠Q. !!!!!!!!!!!!!!!!!!!!!!! 5分 ∵∠ACD是△ABC的外角, ∴∠ACD=∠ABC+∠A. ∴∠ACD=2∠QBC+∠A. ∴∠QCD= 1 1 ( 2∠QBC+∠A)=∠QBC+ ∠A. !!!!!!!!!!!!!! 6分 2 2 1 ∠ A. 2
∠AEB=∠AEF, ∴△ABE≌△AFE. ∴AF=AB. !!!!!!!!!!!!!!!!!!!!!!!!!!!!! 5分 ( 3)∵直线BC是⊙O的切线, ∴AB⊥BC. !!!!!!!!!!!!!!!!!!!!!!!!!!!!! 6分 ∴∠ABE+∠FBC=90°. ∵∠ABE+∠BAE=90°, ∴∠BAE=∠FBC. !!!!!!!!!!!!!!!!!!!!!!!!!! 7分 ∵sin∠FBC= 姨 5 , 5 ∴sin∠BAE= 姨 5 . 5 在Rt△ABE中,sin∠BAE= BE = 姨 5 ,AB=10, 5 AB ∴BE= 姨 5 ×10=2 姨 5 . 5 ∵AF=AB,∠BAE=∠FAE. ∴BF=2BE=2×2 姨 5 =4 姨 5 . !!!!!!!!!!!!!!!!!!!!! 21.( 1)证明:设中间的数为a. !!!!!!!!!!!!!!!!!!!!!! ∴ ( a-1) ( a+1)- ( a-7) ( a+7) !!!!!!!!!!!!!!!!!!!!!! 2 2 =a -1( a -49) 2 2 =a -1-a +49 =48. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ( 2)解:设这五个数中最大数为x. !!!!!!!!!!!!!!!!!!! 由题意,得x ( x-14)=435. !!!!!!!!!!!!!!!!!!!!!!! ( 不合题意,舍去). !!!!!!!!!!!!!!! 解方程,得x1=29,x1=-15 答:这5个数中最大的数是29. !!!!!!!!!!!!!!!!!!!!! 另解:设这五个数中中间的数为x. !!!!!!!!!!!!!!!!!!! 由题意,得 ( x-7) ( x+7)=435. !!!!!!!!!!!!!!!!!!!!! 解方程,得x1=22,x1=-22 ( 不合题意,舍去). !!!!!!!!!!!!!!! ∴x+7=29. 答:这5个数中最大的数是29. !!!!!!!!!!!!!!!!!!!!! ( 3)他的说法不正确. !!!!!!!!!!!!!!!!!!!!!!!! 22. 解: ( 1)∠EAF=∠ABC还成立. 证明∵四边形ABCD是平行四边形, ∴AB∥CD. 8分 1分 2分

2019年山西省中考模拟百校联考数学试卷及答案

2019年山西省中考模拟百校联考数学试卷及答案

第1页(共12页) 第2页(共12页)2019年山西省中考模拟百校联考试卷数学注意事项:1.本试卷共6页,满分120分,考试时间120分钟.2.答卷前,考生务必将自己的姓名、准考证号填写在本试卷相应的位置。

3.答案全部在答题卡上完成,答在本试卷上无效第I 卷选择题(共30分)一、选择题(本大题共10个小题,每小题3分,共30分。

在每小题给出的四个选项中,只有一项符合题目要求,请选出并在答题卡上将该项涂黑) 1.已知实数a 的相反数是a ,则a 的值为 A.2 B.2- C. 2± D.22 2.如图,在△ABC 中,∠ABC=90°,直线l 1,l 2,l 3分别经过△ABC 的顶点A ,B ,C ,且l 1∥∥l 2∥l 3类,若∠1=40°,则∠2的度数为 A.30° B.40° C.50° D.60° 3.下列计算正确的是A .x 3+x 3=2x 6B .x 3÷x =x 3C.(x +y )2=x 2+y 2D.(-x 3)2=x 64.方程x 2+3x -1=0的根的情况是A.有两个相等的实数根B.有两个不相等的实数根C.没有实数根D.只有一个实数根5.国家体育局主办的第二届全国青年运动会于2019年在省城太原举行,为筹办本届赛事,太原市将在汾河南延段建设“水上运动中心”,预计总投资额为31亿元。

数据31亿元用科学记数法表示为A.31×109元B.31×108元C.3.1×109元D.3.1x105元6.《九章算术》是我国古代的数学著作,是《算经十书》中最重要的一种,大约成书手公元 前200——前50年,《九章算术》不仅最早提到分数问题,还详细记录了《方程》等内容的类型及详细解法,是当时世界上最为重要的数学文献公元263年,为《九章算术》作注本的 数学家是A.欧拉B.刘徽C.祖冲之D.华罗庚 7.下列调查方式适合用普查的是A.调查一批某种灯泡的使用寿命B.了解我国八年级学生的视力状况C.了解一沓钞票中有没有假钞D.了解某市中学生的课外阅读量 8.如图所示几何体的左视图是9.《庄子》一书里有:“一尺之捶(木棍),日取其半,万事不竭(尽,完).”这句话可以用数学符号表示:⋯⋯++⋯⋯+++=n 21212121132也可以用图形表示.上述研究问题的过程中体现的主要数学思想是 A.函数思想 B.数形结合思想 C.公理化思想 D.分类讨论思想10.如图,正方形ABCD 的边长为8,分别以正方形的三边为直径在正方形内部作半圆,则 阴影部分的面积之和是A.32B.2πC.10π+2D.8π+1第Ⅱ卷非选择题(共90分)二、填空题(本大题共5个小题,每小题3分,共15分)11.计算))((252252---的结果是 。

山西省太原市第五十三中学2019山西中考模拟百校联考(一)数学试卷(PDF版)

山西省太原市第五十三中学2019山西中考模拟百校联考(一)数学试卷(PDF版)

C E
A
B
D
(第 15 题图)
三、解答题(本大题共 8 个小题,共 75 分.解答题应写出文字说明、证明过程或演算步骤)
16.(每小题 5 分,共 10 分)计算:
姨 姨 (1) 1-姨2
+2-2-
1 2
2
+(姨 2 -1)0.
姨 姨 (2)
1+
4 a-2
÷ a2+4a+4 . 3a+6
17.(本题 7 分)如图,一次函数 y=kx+b(k≠0)的图象与反比例函数 y= mx (m≠0,x>0)的图
0 1%2%3%4%5%6%7%8%9%10%11%12 月份
(第 4 题图)
4. 张老师家 1 月至 12 月的用电量统计如图所示,这组数据的众数和中位数分别是
A. 3姨 3 m
B. 27姨 3 m
姨 姨 C. 3姨 3 + 3 m 2
姨 姨 D. 27姨 3 + 3 m 2
9. 如图所示,把一张矩形的纸片按图示对折两次,然后剪下一部分,若得到一个钝角为
∴∠1= 1 ∠ABC,∠2= 1 ∠ACB.
2
2
∴∠A=180°-2(∠1+∠2).
∴∠1+∠2=90°- 1 ∠A. 2
∴∠P=180°-(∠1+∠2)=90°+ 1 ∠A. 2
A P B 12 C 34
M (第 18 题图 1)
规律 2,∵∠3= 1(∠A+∠ACB),∠4= 1(∠A+∠ABC),
D
A
E
B
(第 8 题图)
2. 已知 a<b,下列四个不等式中,正确的是

2019年山西中考百校联考(一)英语试题及答案

2019年山西中考百校联考(一)英语试题及答案

2019.3.20-212019.3.20-21山西中考模拟百校联考试卷(一)英语参考答案及评分标准英语(一)答案第2页(共2页)英语(一)答案第1页(共2页)一、情景反应(每小题1分,共5分)1~5BACAB二、对话理解(每小题1分,共5分)6~10CCBAA三、语篇理解(每小题1分,共5分)11~15BCCAC四、听力填空(每小题1分,共5分)16.Eighty 鄄three /8317.push 18.differently 19.feelings 20.helpful五、单项选择(每小题1分,共10分)21~25BCACA 26~30AACAA六、补全对话(每小题1分,共5分)31~35FGAEB七、完形填空(每小题1分,共10分)36~40CABBA 41~45BCACB八、阅读理解(每小题2分,共50分)(A )46~50DFAEB(B )51~55CAACB(C )56~60BDEFC(注:以上各题与答案不符者均不得分。

)(D )61.quickly 62.healthy 63.reason 64.千里之行,始于足下。

65.rest(注:以上各题如与答案不一致,但与原文意思相符,且使用正确,可酌情给分。

)(E )66.Verbal bullying.67.大多数父母不能认真对待欺凌事件。

68.To show that school bullying may cause lifelong pain.69.telling the bully to stop70.We can make a poster/speech./We should hold a class meeting./What abouthanding out some notices?/...(注:只要所给答案符合要求,且表述无误,即可得满分;如果所给答案符合要求,但表述有误,以5小题为单位,单词拼写错误累计4处扣1分,语法错误累计2处扣1分;第70小题言之有理且表述无误,即可得分;如所给答案不符合要求,不可得分。

2019山西中考模拟百校联考试卷(一)数学试卷解析

2019山西中考模拟百校联考试卷(一)数学试卷解析

14. 小明用火柴棒按如图所示的规律摆放下列图形,则摆放第 n 个图形共需要火柴棒 根.
【考点】找规律:图形规律
【难度星级】★
【答案】 5n +1
【解析】当六边形个数分别为 1,2,3 时,火柴棒根数分别为 6,11,16
所以当六边形个数为 n 时,火柴棒根数为 6+5(n −1)=5n +1
15. 如图,在 ABC 中, AC = BC , ACB=100 ,点 D 在线段 AB 上运动( D 不与 A , B 重
剪口与折痕所成的角的度数应为 30 或 60
故选:C
10. 如图所示,已知点 A 坐标为 (6,0) ,直线 y = x + b(b 0) 与 y 轴交与点 B ,连接 AB , = 75 ,则 b 的值为
A. 2 3 B. 3 3 C.3 D. 6 3
【考点】一次函数与解直角三角形
【考点】解直角三角形
【难度星级】★★
【答案】C
【解析】 AB ⊥ BE, DE ⊥ BE, AD ⊥ CE
四边形ABED 是矩形
BE = 9m,AB =1.5m AD = BE = 9m,DE = AB =1.5m
在 Rt △ ACD 中,
CAD = 30, AD = 9m CD = AD tan 30=9 3 =3 3m
(2) D是一次函数与y轴的交点

D

0,

2 3

SBCD
= 1 BC 2
yD
= 1 3 2 =1 23
【难度星级】★★
18. (本题 7 分)
探索三角形的内(外)角平分线形成的角的规律
在三角形中,由三角形的内角平分线、外角平分线所形成的角存在一定的规律,如果能

2019山西中考模拟百校联考试卷(一)英语试卷及解析

2019山西中考模拟百校联考试卷(一)英语试卷及解析

山西中考模拟百校联考试卷(-)英语试卷注意事项5 本试卷分听力和笔试两部分。

全卷共12页,满分120分,考试时间120分钟(含听力测试20分钟)6.答题前,考生务必将自己的姓名、准考证号填写在本试卷相应的位置。

7 答案全部在答题卡上完成,答在本试卷上无效。

8 考试结束后,将本试卷和答题卡一并交回。

笔试部分(共100分)五、单项选择(每小题l分,共IO分)21. O n Tree-Planting Day, I planted some young trees with my sister and I will look after well.A. herB. them22.Nowadays products "Made in China" are much loved by foreigners, especially trad山onal Chinese art like paper cutting.A. coursesB. skillsC.pieces23.A cause would always lead to a result.it's better to think twice before making a move.A. SoB.OrC. But24.It's especially important to behave in a way in public places.A. specialB. directC.proper25.Social practice activities encourage students to use what they are learning in real life. This canthe students'interests in study.A. developB. collectC. compare26. While shopping on l ine is accepted , the over packaging(包裹)leads too much rubbishA. widelyB. suddenly27. ---I think John set a good example in our school.C. probably---That's true. Whoever is he always tries his best to give a hand.A. in troubleB.in publicC. in person28. If we computers too much. I'm afraid that we might forget how to write Chinese characters(汉字)one day.A. care aboutB. deal with29. ---Gina, you look thinner. What's the secret?. I exercise more than before.A. First of all8. As a result30. ---The exam is coming soon. I want to know. C. depend on C.In that case---Well, you can list the things you haven't understood yet and talk with your teachersA. how I can prepare for itB.who can teach me betterC. what I should understand六、补全对话(每小题l分,共5分)诸根据对话内容,从方框内所给的选项中选出能填入空白处的最佳选项,使对话意思宪整,并在答题卡上将该项涂熙。

2019山西中考模拟百校联考试卷一英语

2019山西中考模拟百校联考试卷一英语

2019山西中考模拟百校联考试卷一英语Part 1: Listening (第一部分:听力)Section A (第一部分:A 部分)Directions: In this section, you will hear five short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question, there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on the answer sheet with a single line through the center.1. M: Could you please pass me the salt?W: Sorry, I can't. My hands are dirty.Q: What does the woman mean?2. W: What's the weather like today?M: It's quite hot. You should take an umbrella with you.Q: What does the man suggest the woman do?3. M: I'm planning a trip to the Great Wall. Would you like to join me?W: That sounds great. I've always wanted to visit there.Q: What does the woman mean?4. M: How did your football match go yesterday?W: We won the game. I scored a goal in the last minute.Q: What did the woman do in the football match?5. M: I can't find my phone. Have you seen it?W: I remember you left it on the kitchen table this morning.Q: Where does the woman think the man's phone is?Section B (第一部分:B 部分)Directions: In this section, you will hear a short passage. Listen carefully and then fill in the numbered blanks with the information you have heard. Fill in each blank with no more than three words.I often take the bus to work. Yesterday morning, I (6)________ the bus as usual, but it was so crowded. I (7)________ that I couldn't find a seat. I was standing next to a young lady who was reading a book. Suddenly, the bus stopped and she (8)________ her balance. I quickly held her hand and helped her (9)________. She thanked me with a smile. I felt happy to help others.Part 2: Reading Comprehension (第二部分:阅读理解)Directions: In this part, you will read five passages. Each passage is followed by several questions. Read the passages carefully and answer the questions based on the information provided. For each question, choose the best answer from the four choices marked A), B), C) and D).Passage 1Do you have a lot of homework? Do you feel stressed about it? Here are some tips to help you deal with homework. First, set a routine. Decide on a fixed time and place to do your homework. This will help you develop a habit. Second, break it down. Divide your homework into smaller tasks. This will make it easier to focus and manage your time. Third, take breaks. Studies show that taking short breaks during long study sessions can actually improve concentration. Finally, ask for help if you need it. Don't be afraid to ask your teacher, classmates, or parents for assistance. Remember, everyone needs help sometimes.6. What should students do to develop a habit of doing homework?7. Why is it helpful to divide homework into smaller tasks?8. What can help improve concentration during long study sessions?9. Who can students ask for help if they need it?Passage 2As a student, it is important to have good study habits. Here are some tips to help you improve your studying. First, find a quiet and comfortable place to study. Make sure you have all the materials you need before you start. Second, set goals for yourself. Create a study plan and set specific goals for each study session. This will help you stay organized and motivated. Third, take breaks. Study for a certain amount of time, and then take a short break. This will help you stay focused and avoid burnout. Finally, review what you have learned. After each study session, review the material to reinforce your understanding.10. What should students do before they start studying?11. Why is it important to set goals for each study session?12. What can help students stay focused and avoid burnout?13. When should students review what they have learned?Passage 3In recent years, the popularity of e-books has been growing. E-books are electronic versions of traditional books that can be read on devices such as e-readers, tablets, and smartphones. There are several advantages to e-books. First, they are convenient. You can carry hundreds of books in a single device, which makes it easy to read on the go. Second, they are environmentally friendly. E-books save paper and reduce the need for physical storage space. Third, they are often cheaper than printed books. Many e-books are available for free or at a lower cost than their printed counterparts. However, some people still prefer printed books for various reasons.14. What are e-books?15. What is one advantage of e-books?16. Why are e-books often cheaper than printed books?17. What do some people still prefer despite the popularity of e-books?Passage 4Have you ever heard of the "Gutenberg Bible"? It is the first major book printed with movable type in Europe. Johannes Gutenberg, a German inventor, is credited with inventing the printing press in the 15th century. Before Gutenberg's invention, books were handwritten, which made them expensive and hard to obtain. The printing press revolutionized the production of books, making them more affordable and widely available. Gutenberg's invention had a significant impact on society, as it helped spread knowledge and information. Today, the printing press is considered one of the most important inventions in history.18. What is the Gutenberg Bible?19. What is one advantage of the printing press?20. How did Gutenberg's invention impact society?21. What is the printing press considered today?Passage 5Have you ever wanted to learn a musical instrument? Playing a musical instrument has many benefits. First, it can improve your memory. Learning to read music and play an instrument exercises your brain, which can enhance your memory skills. Second, it can boost your creativity. Playing an instrument allows you to express yourself and explore your creative side. Third, it can reduce stress. Playing music has been shown to lower stress levels and promote relaxation. Finally, it can increase self-confidence. As you learn to play an instrument, you will become more confident in your abilities.22. What is one benefit of playing a musical instrument?23. How can playing an instrument reduce stress?24. What can learning to play an instrument do for self-confidence?25. What is the main idea of the passage?Part 3: Vocabulary and Grammar (第三部分:词汇和语法)Directions: There are 20 incomplete sentences in this part. For each sentence, there are four choices marked A), B), C) and D). Choose the one that best completes the sentence. Mark your answer on the answer sheet.26. I'm sorry. I ________ remember your name.27. It's important to ________ a balanced diet to stay healthy.28. My brother ________ studying French for three years.29. Peter is ________ student in our class. He always gets top grades.30. I haven't seen her ________ last week.31. She ________ a red T-shirt and jeans.32. The concert ________ place last night.33. The train ________ at 10:30 a.m.34. ________ is it from your home to school?35. Could you please ________ the window? It's too hot in here.36. He ________ to the movies with his friends.37. We ________ a party to celebrate her birthday.38. The museum ________ at 9:00 a.m. and closes at 5:00 p.m.39. I ________ that book. Can I borrow it?40. I ________ him for ten years.41. ________ you eat too much junk food, you will get fat.42. I ________ to bed late last night.43. I ________ basketball every weekend.44. I ________ to the park.45. ________ you study hard, you won't pass the exam.Part 4: Writing (第四部分:写作)Directions: For this part, you are allowed 30 minutes to write a composition on the topic "The Importance of Sports". You should write at least 120 words and base your composition on the outline (given in Chinese) below.1. 体育运动对于个人发展的重要性2. 体育运动对于社会的重要性3. 我的观点体育运动的重要性:1. 体育运动对于个人发展非常重要。

2019年山西中考百校联考(一)数学试题及答案

2019年山西中考百校联考(一)数学试题及答案

一、选择题1~5.BDADB 6~10.DBCCA二、填空题11.x =-112.(-2,-1)13.0.614.(5n +1)15.80°或110°三、解答题16.解:(1)原式=2摇姨-1+14-14+!!!!!!!!!!!!!!!!!!!!14分=2姨!!!!!!!!!!!!!!!!!!!!!!!!!.5分(2)原式=a +2a -2÷(a +2)23(a +2)!!!!!!!!!!!!!!!!!!!!!!!8分=a +2a -2×3(a +2)!!!!!!!!!!!!!!!!!!!!!!!!9分=3a -2!!!!!!!!!!!!!!!!!!!!!!!!!!.10分17.解:(1)∵AB ⊥x 轴,点A (n ,2),∴点B (n ,0),AB =2.∵点C (1,0),∴BC =n -1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.1分∴S △ABC =12AB ·BC =12×2×(n -1)=3.∴n =4.∴点A (4,2)!!!!!!!!!!!!!!!!!!!!!!!!!!!!.2分∵点A 在反比例函数y =mx (m ≠0)的图象上,∴m =4×2=8.∴反比例函数的函数表达式为y =8x (x >0)!!!!!!!!!!!!!!!.3分将A (4,2),C (1,0)代入y =kx +b ,得4k +b =2,k +b =0≠.!!!!!!!!!!!!!!!!!!!!!!!!!!!!4分解得k =23,b =-23≠≠≠≠≠≠≠≠≠≠≠≠≠.∴一次函数的函数表达式为y =23x -23!!!!!!!!!!!!!!!!!.5分(2)当x =0时,y =23x-23=-23.∴点D 0,-23≠≠!!!!!!!!!!!!!!!!!!!!!!!!!!!.6分∴OD =23.∴S △BCD =12BC ·OD =12×3×23=1!!!!!!!!!!!!!!!!!!!!.7分18.解:(1)答案不唯一,如三角形内角和定理或者三角形的内角和等于180°或者三角形的一个外角等于和它不相邻的两个内角的和!!!!!!!!!!!!!!.2分(2)∠Q =12∠A !!!!!!!!!!!!!!.3分理由如下:∵BQ ,CQ 平分∠ABC 和∠ACD .∴∠QBC =12∠ABC ,∠QCD =12∠ACD !!!!!!!!!!!!!!!!.4分∵∠QCD 是△BCQ 的外角,∴∠QCD =∠QBC +∠Q !!!!!!!!!!!!!!!!!!!!!!!.5分∵∠ACD 是△ABC 的外角,∴∠ACD =∠ABC +∠A .∴∠ACD =2∠QBC +∠A .∴∠QCD =12(2∠QBC +∠A )=∠QBC +12∠A !!!!!!!!!!!!!!.6分∴∠QBC +∠Q =∠QBC +12∠A .∴∠Q =12∠A !!!!!!!!!!!!!!!!!!!!!!!!!!!.7分19.解:(1)总人数为15÷25%=60(人)!!!!!!!!!!!!!!!!!!!.1分A 类人数为60-24-15-9=12(人).∵12÷60=0.2=20%,∴m =20!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.2分(第18题图2)A D C B Q 山西中考模拟百校联考试卷(一)数学参考答案及评分标准数学(一)答案第2页(共6页)数学(一)答案第1页(共6页)2019.3.20-21数学(一)答案第4页(共6页)数学(一)答案第3页(共6页)条形统计图如图:社团选择意向情况条形统计图人数(人)2421181512963015249A.篮球社团B.动漫社团C.文学社团D.摄影社团类别A D CB 12!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!3分(2)1200×25%=300(人).答:估计“文学社团”共有300人.5分(3)列表如下:(或树状图)甲乙丙丁戊甲(乙,甲)(丙,甲)(丁,甲)(戊,甲)乙(甲,乙)(丙,乙)(丁,乙)(戊,乙)丙(甲,丙)(乙,丙)(丁,丙)(戊,丙)丁(甲,丁)(乙,丁)(丙,丁)(戊,丁)戊(甲,戊)(乙,戊)(丙,戊)(丁,戊)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!7分由列表可知,五人中选取两人参加比赛共有20种可能的结果,每种结果出现的可能性相同,同时选中甲、乙两位同学的结果有2种,分别是(甲,乙),(乙,甲).8分所以P (恰好选中甲、乙两位同学)=220=110.9分20.解:(1)如图所示:①AE 就是所求的线段.1分②连接BE 并延长交AC 于点F .2分ADCB EO F(2)AF 与AB 的数量关系是AF =AB .证明:∵AB 为直径,∴∠AEB =90°.3分∵AE 平分∠BAC ,∴∠BAE =∠FAE .4分在△ABE 和△AFE 中,∠BAE=∠FAE ,AE=AE ,∠AEB =∠AEF △△△△△△△△△△△,∴△ABE ≌△AFE .∴AF =AB .5分(3)∵直线BC 是⊙O 的切线,∴AB ⊥BC .6分∴∠ABE +∠FBC =90°.∵∠ABE +∠BAE =90°,∴∠BAE =∠FBC .7分∵sin ∠FBC =5姨5,∴sin ∠BAE =5姨5.在Rt △ABE 中,sin ∠BAE =BE AB =5姨5,AB =10,∴BE =5姨5×10=25姨.∵AF =AB ,∠BAE =∠FAE .∴BF =2BE =2×25姨=45姨.8分21.(1)证明:设中间的数为a .1分∴(a -1)(a +1)-(a -7)(a +7)2分=a 2-1-(a 2-49)=a 2-1-a 2+49=48.3分(2)解:设这五个数中最大数为x .4分由题意,得x (x -14)=435.5分解方程,得x 1=29,x 1=-15(不合题意,舍去).6分答:这5个数中最大的数是29.7分另解:设这五个数中中间的数为x !!!!!!!!!!!!!!!!!!!.4分由题意,得(x -7)(x +7)=435.5分解方程,得x 1=22,x 1=-22(不合题意,舍去).6分∴x +7=29.答:这5个数中最大的数是29.7分(3)他的说法不正确.9分22.解:(1)∠EAF =∠ABC 还成立.证明∵四边形ABCD 是平行四边形,∴AB ∥CD .∴∠ABC +∠BCD =180°.1分!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!2019.3.20-21数学(一)答案第5页(共6页)数学(一)答案第6页(共6页)在四边形AECF 中,∵AE ⊥BC ,AF ⊥CD ,∴∠AEC +∠AFC =180°.∴∠EAF +∠BCD =180°!!!!!!!!!!!!!!!!!!!!!!!.2分∴∠EAF =∠ABC !!!!!!!!!!!!!!!!!!!!!!!!!!.3分(2)∵四边形ABCD 是平行四边形,∴∠ABC =∠ADC ,AD =BC .∴∠ABE =∠ADF !!!!!!!!!!!!!!!!!!!!!!!!!!.4分在△ABE 和△ADF 中,∠ABE=∠ADF ,∠AEB=∠AFD =90°△,∴△ABE ∽△ADF !!!!!!!!!!!!!!!!!!!!!!!!!.5分∴AB AD =AE AF !!!!!!!!!!!!!!!!!!!!!!!!!!!!.6分∵AD =BC ∴AB BC =AE AF .∴AB AE =BC AF !!!!!!!!!!!!!!!!!!!!!!!!!!!!.7分在△ABC 和△EAF 中,∠ABC=∠EAF ,AB AE =BC AF ∽∽∽∽∽∽∽∽∽,∴△ABC ∽△EAF !!!!!!!!!!!!!!!!!!!!!!!!!.8分∴∠AFE =∠ACB .∵∠ACB =27°,∴∠AFE 的度数为27°!!!!!!!!!!!!!!!!!!!!!!!!.9分(3)结论:答案不唯一,例如,AE =AF ;AM =AN ;EN =FM ;EM =FN ;∠EAM =∠FAN !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.11分23.解:(1)由y =0,得2x 2+4x -6=0.解方程,得x 1=-3,x 2=1.∵点A 在点B 的左侧,∴点A 的坐标为(-3,0),点B 的坐标为(1,0)!!!!!!!!!!!!!!!.2分由x =0,得y =-6.∴点C 的坐标为(0,-6)!!!!!!!!!!!!!!!!!!!!!!!.3分(2)∵EA =EB =EC ,∴点E 在AB 的垂直平分线上,E 在AC 的垂直平分线上.∵y =2x 2+4x -6=2(x +1)2-8!!!!!!!!!!!!!!!!!!!!!!!.4分∴设E (-1,m ),连接AE ,EC ,过点E 作EG ⊥y 轴于点G ,则AD=2,DE=-m ,EG =1,GC =m +6.∵EA =EC ,∴22+m 2=12+(m +6)2!!!!!!!!!!!!!!!!!!!!!.5分解得m =-114!!!!!!!!!!!!!!!!!!!!!!!!!!!!.6分∴若EA =EB =EC ,点E 的坐标为-1,-114∽∽!!!!!!!!!!!!!!!!.7分(3)抛物线上存在点P ,使tan ∠ABP =1611tan ∠ABE .分两种情况:①点P 在x 轴下方时,如图,连接EB ,PB .PB 与直线l 相交于点F .A P O F E D C B x l y G 由(2)可知,在Rt △DBE 中,DB =2,DE =114.∴tan ∠ABE =tan ∠DBE =DE DB =118!!!!!!!!!!!!!!!!!!!.8分∴tan ∠ABP =1611tan ∠ABE =1611×118=2!!!!!!!!!!!!!!!!!!.9分∴DF DB =2.∴DF =4.∴点F 的坐标为(-1,-4)!!!!!!!!!!!!!!!!!!!!!!.10分设直线BF 的函数表达式为y=kx+b .∴k +b =0,-k +b =-4△.解得k =2,b =-2△.∴直线BF 的函数表达式为y =2x -2!!!!!!!!!!!!!!!!!!.11分解方程2x 2+4x -6=2x -2,得x 1=-2,x 2=1(舍去).∴x =-2,y =2x -2=-6.∴点P 的坐标为(-2,-6)!!!!!!!!!!!!!!!!!!!!!!.12分②点P 在x 轴上方时,同理可得,点P 的坐标为(-4,10).∴在抛物线上存在点P ,使tan ∠ABP =1611tan ∠ABE ,点P 的坐标为(-2,-6)或(-4,10)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.14分2019.3.20-21。

2019年山西中考百校联考(一)语文试题及答案

2019年山西中考百校联考(一)语文试题及答案

山西中考模拟百校联考试卷(一)语文参考答案及评分标准语文(一)答案第2页(共2页)语文(一)答案第1页(共2页)一、读·书(12分)1.一笔勾销诸事顺利(书写准确、规范,每个1分,共2分)2.(1)在水一方(2)悠然见南山(3)荡胸生曾云(4)长风破浪会有时(5)人有悲欢离合(6)波涛如怒(7)无可奈何花落去似曾相识燕归来(8)择其善者而从之其不善者而改之(多字、漏字、错字均不得分,每空1分,共10分)二、读·思(38分)3.(1)“挡”改为“档”(2)“慨”改为“概”(每空1分,共2分)4.C (2分。

“咬文嚼字”是并列短语)5.①许云峰②《鲁滨逊漂流记》③盼望与罗切斯特一起过幸福的生活(每空1分,共3分;③中所填内容,只要符合原著内容,能体现出简·爱对未来的盼望即可)6.①书多易使读者不专精;②书多易使读者迷方向;③读书并不在多,最重要的是选得精,读得彻底。

(每空1分,共3分;摘录出②③④段的中心句即可)7.略。

(任选一句作为开头1分;观点明确1分;能结合自己的阅读体验,围绕观点展开论述4分;思路清晰,表达条理2分;语言流畅,说服力强2分。

共10分。

字数不合要求酌情扣分)8.B (3分。

A 项分别为“b ì”和“f ú”;B 项都读“ji àn ”;C 项分别为“sh ǔ”和“zh ǔ”;D 项分别为“n ǚ”和“r ǔ”)9.A (3分。

异同:这里指不同)10.C (3分。

C 句中的“可”表“大约”之意)11.D (3分。

“……太守醉也”表现的是与民同乐)12.哀而不愁乐而不荒对偶(每空1分,共3分)13.B (3分)三、读·写(70分)14.示例:周大爷,您好!我已经在网上帮您预订了一张今天从晋城到北京西的硬卧车票。

出发时间是今晚20:02分,到站时间是明天早上5:26分,您坐的车次是K1165次,票价是182元。

您要记得提前到站取票候车哦。

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与代数式的值的变化之间的对应关系,其中渗透的数学思想是
输入 x
A. 数形结合 B. 分类讨论 C. 类比思想 D. 函数思想
-2 ×(- 3)
输出
8. 一个盒子装有除颜色外其他均相同的 2 个红球和 3 个白球,现从中任取 2 个球,则取
到的是一个红球、一个白球的概率为
A. 2 5
B. 2 3
C. 3 5
科学计数法表示是
A. 0.37176×109 元
B. 3.7176×108 元
C. 3.7176×109 元
D. 3.7176×1010 元
数学(一)
第 1 页(共 6 页)
5. 学校准备设计一款女生校服,对全校女生喜欢的颜色进行了问卷调查,统计如下表所 示:
颜色
黄色
绿色
白色
紫色
红色
学生人数 100
D. 3 10
9. 将抛物线 y = 2x2 的图象所在的坐标轴向左、向上都平移 3 个单位,得到抛物线的函数
表达式为
A. y = 2(x + 3)2 + 3 C. y = 2(x - 3)2 - 3
B. y = 2(x - 3)2 + 3 D. y = 2(x + 3)2 - 3
10. 如图矩形 ABCD 中,点 E 是 BC 边的中点,AE⊥BD 于点 F,连接 DE,则 tan∠BDE 的
第Ⅰ卷 选择题(共 30 分)
一、选择题(本大题共 10 小题,每小题 3 分,共 30 分)
在每个小题给出的四个选项中,只有一项符合题目要求,请选出并在答题
卡上将该项涂黑。
1. - 1 的倒数是 2
A. 2
B. - 2
C. 1
D. - 1
2
2
嗓x - 5 < 1
2. 不等式组
的解集是
2x > 3
A. x < 6
图形的信息,回答下列问题:
学生数学考试成绩频数分布直方图
各组学生人数所占百分比
人数
20
14 8
4
0
分数 95 100 105 110 115 120
第三组 40% 第二组
第四组
第一组
(1)本次调查共随机抽取了该年级多少名学生? (2)将频数分布直方图补充完整; (3)若将得分转化为等级,规定:得分低于 105 分评为“D”,105~110 分评为“C”,
其中 A,B 两点分别落在直线 a,b 上,若∠1 = 26毅,则∠2 的度数为 ___________.
1
Bb
C
2
a
A



(第 12 小题图)
(第 13 小题图)
13. 如图所示,上面图形都是由相同的康乃馨按照一定的规律摆成的,按此规律摆下去,
第 n 个图形中有 ____________ 朵康乃馨(用含有 n 的代数式表示).
与难度系数,命题教师赴我省某区选取一个水平相当的初三年级进行调研,命题教
师将随机抽取的部分学生成绩(得分为整数,满分为 120 分)分为 5 组:第一组 95~
100;第二组 100~105;第三组 105~110;第四组 110~115;第五组 115~120,统计
后得到如图所示的频数分布直方图(每组含最小值不含最大值)和扇形统计图,观察
B. x > 3 2
C. 3 < x < 6 2
D. x < - 4
3. 右图是由 4 个相同的小正方体组成的几何体,其俯视图为
A
B
C
D
4. 山西省 2019 年水利厅水利部门预算 3717.6 百万元,比 2018 年增加. 增加的原因是增
加了大水网工程扫尾、农村饮水安全、大水网还贷等项目支出预算. 将 3717.6 百万用
连接 AM 并延长交 CD 于 N,则△MNC 的面积为 ____________.
三、解答题(本大题共 8 个小题,共 75 分)
解答应写出文字说明,证明过程或演算步骤。
16. (本题共 2 个小题,每小题 5 分,共 10 分)
(1)计算:(- 2)0 - 姨27 sin 60毅 +(1 )-2; 3
14. 将矩形 ABCD 绕点 A 逆时针旋转 90毅至矩形 AEFG,点 D 的旋转路径为 DG. 若 AB=1,
BC=2,则阴影部分的面积为 __________.
D C
F
E
A
D
M N
G
A
B
B
C
(第 14 小题图)
(第 15 小题图)
15. 如图,在边长为 4 正方形 ABCD 中,把边 BC 绕点 C 顺时针旋转 60毅,得到线段 CM,
(2)先化简:( 1 x+1
-
1 1-x
)÷
x2
-
2x 2x
+
1
,再从 1,2,3 中选一个你认为合适的数作
为 x 的值代入求值.
数学(一)
第 3 页(共 6 页)
17. (本题 9 分)如图,一次函数 y1 = kx + 6(k、b 为常数,k≠0) 的图象与 x 轴、y 轴分别交于 A、B 两点,且与反比例函数
姓名 ____________________ 准考证号 _______________________
山西省中考模拟试题
数学
注意事项: 1. 本试卷分第Ⅰ卷和第Ⅱ卷两部分。全卷共 6 页,满分 120 分,考试时间 120 分钟。 2. 答卷前,考生务必将自己的姓名、准考证号填写在本试卷相应的位置。 3. 答案全部在答题卡上完成,答在本试卷上无效。 4. 考试结束后,将本试卷与答题卡一并交回。
值是
A. 姨 2 4
B. 1 4
C. 1 3
D. 姨 2 3
A
D
F
B
E
C
数学(一)
第 2 页(共 6 页)
第Ⅱ卷 非选择题(共 90 分)
二、填空题(每小题 3 分,共 15 分)
11. 计算:(2姨 3 - 1)(2姨 3 + 1)= __________. 12. 已知直线 a∥b,将一块含 30毅角的直角三角板 ABC 按如图方式放置(∠ABC = 30毅),
y2 =
n(n 为常数,且 n≠0)的图象交于点 C x
和点
E.
CD⊥x
轴,垂足为 D,连接 DE,若 OB = 2OA = 3OD.
y C
B
OA
D
x
(1)求求△CDE 的面积;
(3)当 x 为何值时,y1 ≤ y2?请直接写出 x 的取值范围.
18. (本题 9 分)为落实 2019 年中考改革制度,掌握我省中考模拟数学试题的命题质量
180
220
80
750
学校决定采用红色,可用来解释这一现象的统计知识是
A. 平均数
B. 中位数
C. 方差
D. 众数
6. 下列计算正确的是
A. a + a2 = 2a3 C. (2a4)4 = 8a16
B. a·2 a3 = a6
D. (-
a b2
)3 =
-
a3 b6
7. 如图“数值转换机”就是一个运算程序或算法,它可以直观形象地体现字母取值的变化
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