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  • ID:2-7520343 浙江省瑞安市滨江中学2020届九年级第二次适应性考试语文试题(图片版,无答案)

    初中语文/中考专区/模拟试题

    浙江省瑞安市滨江中学2020届九年级第二次适应性考试语文试题(图片版,无答案)

    • 2020-06-30
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  • ID:4-7520341 浙江省瑞安市滨江中学2020届九年级第二次适应性考试英语试题(图片版,无答案)

    初中英语/中考专区/模拟试题

    浙江省瑞安市滨江中学2020届九年级第二次适应性考试英语试题(图片版,无答案)

    • 2020-06-30
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  • ID:3-7520340 浙江省瑞安市滨江中学2020届九年级第二次适应性考试数学试题(图片版,无答案)

    初中数学/中考专区/模拟试题

    浙江省瑞安市滨江中学2020届九年级第二次适应性考试数学试题(图片版,无答案)

    • 2020-06-30
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  • ID:21-7520338 浙江省瑞安市滨江中学2020届九年级第二次适应性考试社会法治试题(图片版,无答案)

    初中社会思品/中考专区/中考模拟

    浙江省瑞安市滨江中学2020届九年级第二次适应性考试社会法治试题(图片版,无答案)

    • 2020-06-30
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  • ID:5-7520337 浙江省瑞安市滨江中学2020届九年级第二次适应性考试科学试题(图片版,无答案)

    初中科学/中考专区/模拟试题

    浙江省瑞安市滨江中学2020届九年级第二次适应性考试科学试题(图片版,无答案)

    • 2020-06-30
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  • ID:5-7517890 浙江省嵊州市2020年中考模拟考试科学试题(图片版,含答案)

    初中科学/中考专区/模拟试题

    1079500012039600

    • 2020-06-29
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  • ID:2-7517888 浙江省嵊州市2020年中考模拟考试语文试题(图片版,含答案)

    初中语文/中考专区/模拟试题

    1088390011607800

    • 2020-06-29
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  • ID:4-7517886 浙江省嵊州市2020年中考模拟考试英语试题(图片版含答案,无听力音频和材料)

    初中英语/中考专区/模拟试题

    1045210010426700

    • 2020-06-29
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  • ID:5-7517847 浙江省嘉兴市秀洲区2019学年第二学期八年级科学阶段性测试Ⅱ (全册)(word版 含答案)

    初中科学/月考专区/八年级下册

    111

    • 2020-06-30
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  • ID:3-7517846 浙江省嘉兴市秀洲区2019-2020学年第二学期八年级数学阶段性测试二(word版,含答案)

    初中数学/月考专区/八年级下册

    111

    • 2020-06-29
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  • ID:2-7517844 浙江省嘉兴市秀洲区2019-2020学年第二学期八年级语文阶段性测试二(word版,含答案)

    初中语文/月考专区/八年级下册

    111

    • 2020-06-29
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  • ID:21-7517843 浙江省嘉兴市秀洲区2019-2020学年第二学期八年级社会法治阶段性测试二(word版,含答案)

    初中社会思品/月考试卷/八年级下

    111

    • 2020-06-29
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  • ID:4-7517842 浙江省嘉兴市秀洲区2019-2020学年第二学期八年级英语阶段性测试二(word版,含答案)

    初中英语/月考专区/八年级下册

    111

    • 2020-06-30
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  • ID:5-7517060 2020年浙江省金衢十二校联考九年级科学模拟测试卷B卷(word版,含答案)

    初中科学/中考专区/模拟试题

    111

    • 2020-06-29
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  • ID:2-7517058 2020年浙江省金衢十二校联考九年级语文模拟测试卷B卷(word版,含答案)

    初中语文/中考专区/模拟试题

    111

    • 2020-06-29
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  • ID:3-7517057 2020年浙江省金衢十二校联考九年级数学模拟测试卷B卷(word版,含答案)

    初中数学/中考专区/模拟试题

    11

    • 2020-06-29
    • 下载5次
    • 216.48KB
  • ID:21-7517056 2020年浙江省金衢十二校联考九年级社会法治模拟测试卷(word版,含答案)

    初中社会思品/中考专区/中考模拟

    11

    • 2020-06-29
    • 下载2次
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  • ID:5-7469266 浙江省绍兴市诸暨市2020年九年级初中毕业班适应性考试科学试题(图片版 无答案)

    初中科学/中考专区/模拟试题

    11

    • 2020-06-22
    • 下载27次
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  • ID:4-7469264 浙江省绍兴市诸暨市2020年初中毕业班适应性考试试题 英语(含答案、听力题及听力材料,无音频)

    初中英语/中考专区/模拟试题

    2020年初中毕业班质量自测试卷 英 语 考生须知: 1. 本试卷分试卷I(共70分)和试卷II(共50分),共76小题。考试时间100分钟,满分120分。 2. 答题前,请先将自己的学校、班级、姓名、考号等相关信息准确填写到答题卷的指定位置。 3. 答案必须写在答题卷相应的位置上,写在试题卷、草稿纸上均无效。 温馨提示:请仔细审题,细心答题,相信你一定会有出色的表现! 试卷I(选择题 共70分) 第一部分 听力部分(共25分) 一、听力(本大题有15小题,第一节每小题1分,第二节、第三节每小题2分,共计25分) 第一节:听小对话,回答问题。 ( )1. Why does the woman want to eat out in Pizza Hut? A. Because the food there is nice and hot. B. Because it’s cold and wet outside now. C. Because she is too tired to cook dinner. ( )2. When will the concert begin? A. At 6:30. B. At 7:00. C. At 6:00. ( )3. Where are the two speakers most probably talking? A. At a bus stop. B. In a police station. C. In a backpack store. ( )4. What will Jason do this Saturday? A. Go bike riding. B. Go camping. C. Play basketball. ( )5. How much does the man need to pay? A. $7. B. $5. C. $12. 第二节:听较长对话,回答问题。 听下面一段较长的对话,请从A、B、C三个选项中选择正确的选项回答第6—7两个小题。 ( )6. What is the most probable relationship between the two speakers? A. Neighbors. B. Classmates. C. Relatives. ( )7. Why was there noise coming from upstairs? Because Louie was having a science class. B. Because Louie was jumping up and down. C. Because Louie was having a P.E. class. 听下面一段较长的对话,请从A、B、C三个选项中选择正确的选项回答第8—10三个小题。 ( )8. What did Abby decide to lose weight for? Her party. B. Her work. C. Her health. ( )9. How long does Abby exercise every day? A. Half an hour. B. An hour. C. An hour and a half. ( )10. Why hasn’t Ted lost any weight? Because he hasn’t exercised enough. B. Because he has had too much fried food. C. Because he has been eating late-night snacks. 第三节:听独白,回答问题。 听下面一段独白,请从A、B、C三个选项中选择正确的选项回答第11—15五个小题。 ( )11. Who did the speaker first tell his dream to? A. His classmates. B. His teacher. C. His parents. ( )12. What was his first poem about? A. Future lives. B. Broken dreams. C. School memories. ( )13. What did the class do when the speaker showed them his first poem? A. Laughed at him. B. Admired him. C. Congratulated him. ( )14. When did the speaker’s first novel come out? A. When he was thirteen years old. B. After he became a professional writer. C. Before he graduated from high school. ( )15. Why does the speaker review his first poem sometimes? A. To help him create new poems. B. To encourage himself. C. To keep the habit of reviewing. 第二部分 笔试部分(共45分) 二、完形填空(本大题有15小题,每小题1分,共计15分) 阅读下面短文,然后从短文后各题所给的A、B、C、D四个选项中选出最佳选项。 A friend who was down wrote me a letter a few weeks ago. His life was full of 16 . He was low on hope. He ended his letter to me 17 this question, “We can’t really change this crazy world we live in, can we?” I 18 him?immediately?and started my own letter with these words, “Yes, we most certainly can!” I can still remember one of the first times someone changed my 19 . She was the music teacher at my elementary school, the?guitarist?at our church, and a family friend. I was crazy about 20 and wanted to impress (给…留印象) her more than anything. However, I had no talent at any ? 21 . One day she let me try playing her guitar. I did my best but could only play it ? 22 . When I was done, I put my head 23 . “I guess I am not very good,” I told her. She looked at me with her ? 24 eyes, smiled, and said, “We are all good at something. You just need to find out 25 you are good at. Then you can share it with the world.” Those simple words changed me. They planted a seed in my soul that continues to grow to this day. I came to 26 that I had something to give to others. I had something inside of me that was 27 and that could change this world for the better. I just had to find it, bring it out and 28 it. And that is what I have tried to do all of the years 29 that special day. Can you change the world? Yes, you can! You can change it and make it better every 30 day of your life. You can change it one choice, one person, and one kind act at a time. Live well! Do good! Change the world! ( ) 16. A. hope B.happiness     C.problems    D.changes (  ) 17. A. of B.with C.in D.for (  ) 18. A. offered B.sent C.called D.answered (  ) 19. A. hobby B.world C.talent D.choice (  ) 20. A. me B.him C.her D.them (  ) 21. A. sport B.subject C.instrument D.language (  ) 22. A. awfully B.quickly C.politely D.smoothly (  ) 23. A. up B.down C.away D.out (  ) 24. A. kind B.strict C.sad D.angry (  ) 25. A. why B.which C.where D.what (  ) 26. A. regard B.regret C.realize D.recall (  ) 27. A. active B.deep C.free D.good (  ) 28. A. feel B.share C.manage D.beat (  ) 29. A. until B.from C.before D.since (  ) 30. A. single B.similar C.special D.simple 三、阅读理解(本大题有15小题,每小题2分,共计30分) 阅读下面四篇材料,然后从每题所给的A、B、C、D四个选项中选出一个最佳选项。 A Every school has notice boards. Let’s see what is on the school boards of a middle school. Class AnnouncementTesting Dates:The Chinese test is on May 12.The math test is on May 13.After-school Programs:The programs will be open from 3:00 p.m. to 6:00 p.m. every day.3:00-4:30 Doing homework4:30-6:00 Joining in ActivitiesParents Meeting: ?The parents meeting is at 8:00 a.m. on Friday, May 19 in the meeting hall. School PolicyFighting, saying rude words and all other bad behaviors are not allowed.Do not throw rocks or sticks on the school ground.Hand in a note if your child will be absent for the day.Parents need to check in at the school gate when entering the school. How to Keep Yourself Safe from Novel CoronavirusWear masks outdoors.Make sure to wear it properly by tightening up the nose clip and pulling the bottom of it over your chin so that your nose and mouth are both covered. Cover your coughs and sneezes with napkins.Cover your mouth and nose with a napkin when you cough or sneeze, or you can cough or sneeze into your sleeve, but avoid covering with your hands directly.Wash your hands properly.Wash your hands with soap and running water thoroughly for at least 15 seconds.Exercise regularly.Exercise regularly is one of the most important ways to help you stay away from infections(感染). ( )31. From the school notice boards, we can know ▲ . A. students are not allowed to behave badly B. parents meeting will be held in the gym C. after-school programs last two hours every day D. parents need to hand in notes when entering the school ( )32. To keep yourself safe from novel coronavirus, you’d better ▲ . A. pull the top of the mask over the mouth B. cover with your hands when coughing C. wash your hands with running water only D. do sports regularly to strengthen yourself ( )33. Who are these notices most probably written to? A. Doctors and nurses. B. Parents and students. C. The school headmaster. D. Visitors to the school. B It’s just another day at school. You and your friend are chatting in the classroom. Suddenly, your friend’s nose starts to bleed. What would you do? Would you be scared? Or would you do something to help your friend? In daily life, we run into emergencies now and then. Nosebleeds are just one kind of emergency. But if you learn some basic first aid skills, you can help people during emergencies and maybe even save their lives. The second Saturday of September is World First Aid Day, which fell on Sept. 14 in 2019. Right now, it is a good time for us to learn more about first aid. First aid, as its name tells us, refers to the first steps you can take to care for someone who’s hurt. It includes keeping him safe and staying calm. It also includes getting help, by telling other people or calling 120. Every year in China, 3.2 million people die in emergencies. That’s six people per minute on average. Doctors say that the first 10 minutes after an accident can make the difference between life and death. This is why it’s important for us to learn first aid. CPR (心肺复苏术) is one of the most useful first aid skills. It can help people who’ve suffered cardiac arrest (心脏骤停). But if you want to perform CPR, you need to learn how to do it properly. You can take courses offered by the Red Cross Society or some hospitals. ( )34. The writer introduces the topic by ▲ . A. comparing situations B. offering a suggestion C. listing some reasons D. giving an example ( )35. The underlined word “emergencies” in paragraph 2 means ▲ . A. serious natural problems B. basic first aid skills C. unexpected dangerous situations D. important medical courses ( )36. Which of the following is TRUE about the first aid? A. First aid includes keeping people nearby safe. B. Everyone is encouraged to perform CPR. C. CPR is the most useful for people who are hurt. D. The first 10 minutes after an accident is important. ( )37. The best title for the passage can be “ ▲ ” . A. Doctors Can Help B. First Aid Matters C. CPR Works D. Emergencies Happen C Flowers feel feelings. It’s a secret well known by flower lovers. They expect flowers to come out with quiet and soft encouragements. So it should be no surprise that the Yellowbright Flower growing in a large red field trembled(颤抖)with strong feelings now. He trembled because he felt different. He was the only Yellowbright Flower flowering in a field of red plants, whatever they were. He knew walkers stopped and stared before walking on. He knew he was some special thing, the only thing of his kind. And the only thing of anything is always a very lonely thing to be, no matter what thing it is. Until one bright midnight, as he danced in the summer wind, the field spoke to him. Yes, a voice came from one red plant in the field. This plant, whatever it was, now spoke to him by saying this, “You’re not really alone, you know.” No one and nothing had ever spoken to him before. To say he was surprised would be an understatement (轻描淡写). Remember, flowers feel strong feelings. “You’ve been wrong before,” the red plant went on. “You’re a rose. So am I. So are we all, all of us in this big field. If you’re yellow, with a different bloom, ▲ . But it’s all of us, together, that the walkers stop walking to see. Not just you. Together, we’re a garden. Alone, you’re only one pretty but very small blossom.” Funny how this changed things for the Yellowbright Flower, who now realized he was really a Yellowbright Rose. Funny how those few words changed everything. Because nothing is really the only thing of anything, no matter how special that one thing is. We stop feeling different and lonely when we understand we’re part of something larger than ourselves. ( )38. The Yellowbright Flower trembled with strong feelings because ▲ . A. he knew he was a yellow rose. B. he felt different and special. C. he grew in a large field. D. he always felt very lonely. ( )39. The Yellowbright Flower felt ▲ when he first heard a red rose? A. shocked B. scared C. upset D. pleased ( )40. Which of the following can be put in ▲ in paragraph 4? A. your color will make you the most beautiful B. you will not be able to feel the strong feelings C. your color only adds to the beauty of this field D. you will not be seen by walkers walking by ( )41. What does the writer mainly want to tell us? A. Something is really special. B. Everything is part of something C. Anything can be changed. D. Nothing matters except yourself D Have you ever imagined a car moving around our sun? It is true that a red Tesla car is moving around the sun right now. It’s been in space since February 2018, when the private company SpaceX launched (发射) its first flight of the new Falcon Heavy rocket with the car as its test payload (有效荷载). In 2002, young Elon Musk started the company because of his love and interest for space exploration (探索). After an unsuccessful try at buying Russian rockets to help him send mice to Mars and back, the young man made a surprising decision. He planned to build his own rockets. Musk went to Southern California and started attracting people to help bring his dream to life. In a pretty short time, although with difficulties, SpaceX launched Falcon 1, the first successful privately-built rocket in 2008. For SpaceX, the successful launch of Falcon 1 was a major achievement. But it was just the beginning of well-known firsts for the company. As the first Falcon rocket began testing, development for the Falcon 9 had been prepared. This much larger rocket, which uses nine engines, has another extremely important design. The rocket is able to return to Earth and land on their own power, ready to be reused for another flight! This is an unbelievable development in the world of spaceflight. It can greatly reduce the cost of launching things into space. Musk believes reusability is the key to the future of space exploration. And the effort has paid off. SpaceX has made it possible to put satellites(卫星) into space and provide needs to the International Space Station. But that’s just the beginning. SpaceX has made plans for manned tasks. Perhaps some day, a SpaceX rocket with astronauts will pass by Musk’s car on its way to Mars. ( )42. Elon Musk decided to build his own rockets because ▲ . A. he failed to buy Russian rockets B. he had great love for space C. he wanted to send mice to Mars D. he began to study the space ( )43. The underlined word “This” in the last paragraph refers to the fact that ▲ . A. rockets are large and use nine engines B. the cost of the rockets can be reduced C. the payloads of rockets are increased D. rockets can return to Earth by themselves ( )44. Which of the following might be a future improvement for the SpaceX rocket? A. It will reduce the cost. B. It will send men to space. C. It will return to Earth. D. It will be reused after returning. ( )45. The passage is probably from the ▲ column (栏目) in a magazine. A. education B. travel C. technology D. culture 试卷II(非选择题 共50分) 四、词汇运用(本大题分A、B两部分。A部分有5小题,B部分有10小题,每小题1分,共15分) A. 用方框中所给单词的适当形式填空,每词仅用一次(每空一词)。 46. At last, I? ▲ all of the difficulties and my English improved a lot. 47. My story is sweet, but ▲ is heartbreaking. 48. When we make mistakes, she always corrects us kindly and? ▲ . 49. The woman was the wife of Ang Lee, a film ▲ . 50. We can’t keep up with the developing situation? ▲ we study hard enough. B. 根据所给汉语意思及文章内容,写出单词的正确形式。(每空限填一词) Have you ever dreamed of meeting top scientists in person? For Tan Fanglin, a 15-year-old girl from Shanghai, her dream of meeting top scientists has already come true. In October, she 51. (参加) the World Laureates Forum for a second time. Her new 52. (发现) in math has won her many prizes in youth innovation competitions in China. She is regarded as a 53. (英雄) among her classmates. From a very young age, Tan has always found math very 54. (有趣的). That’s largely because of the influence of her father, who always tries to interest her instead of giving her pressure. She 55. (不常;很少) takes after-school classes. And she does 56. (更少的) extra exercises than others. Her mastery of Further Mathematics and her good 57. (成绩) in school are thanks to the right study method. At this forum, Tan got a chance to talk with a famous scientist Gero Miesenbock. She asked the scientist what were the best 58. (个人的) qualities for doing scientific research. He encouraged her not to lose her passion and love for what she does. He said that it was important for researchers to 59. (接受) failures. He added that people all knew that even Thomas Edison went through 60. (百) of unsuccessful tries before finally succeeding. 五、语法填空(本大题有10小题,每小题1分,共计10分) 阅读下面短文,在空白处填入一个适当的词或使用括号中单词的适当形式填空。 To prevent the spread of the novel coronavirus, people in China have to stay inside most of the time, taking online classes or working from home. 61. , there are people risking their lives for the rest of us - delivery (运送) drivers. Gao Zhixiao, a 32-year-old delivery driver, 62. (introduce) by Time magazine last week. Gao appeared on the cover of the magazine 63. his bravery and hard work during the outbreak. He and other drivers deliver food, medicine and other goods to people all over the country. Through 64. (they) efforts, people have been able to get through the outbreak with some comfort. Drivers like Gao are in great need now. Food delivery service Meituan has seen its sales increase by more than 400 percent in some 65. (city), according to Time. These sales can only be made possible by hard-working delivery drivers. Gao, like his fellow drivers, takes 66. health test every morning before beginning his deliveries. He has to spend 20 minutes disinfecting (消毒) his motorcycle and clothing 67. (prevent) any possible spread of the virus, according to Time. Besides delivering goods, Gao once 68. (glad) cooked for an elderly customer who was living alone at her home. He said, “I made her instant noodles and two boiled eggs, then took the trash out 69. I left. She thanked me again and again. It was one of 70. (happy) moments in my life.” 六、任务型阅读(本大题有5小题,每小题1分,共计5分) 阅读下面文章,然后从方框中所给的A-E五个选项中选择正确的选项(其中一项是多余选项),将其序号填入第71-74小题,并回答第75小题。 Ways to Stay Cool and Calm There are many ways to let your fear and anxiety go. Here are some tips from an article by Xinhua, as well as an interview with Wang Weihua, an expert on positive psychology(积极心理学). Less information input Avoid reading too many stories about the epidemic (疫情), as this can influence you too strongly. Try to 71 ▲ . Rumors can make you more anxious. Exercise indoors Exercising not only helps you improve your health, but can also help you set free your anxiety, according to previous studies. You can 72 ▲ . Write or talk If you feel too anxious, try to write in a diary to record your feelings during the epidemic. Through writing, you can 73 ▲ . You can also talk with your friends and family about your feelings. Be creative Show your imagination and support through activities. For example, you can paint pictures that encourage people to fight the virus. If you enjoy music, you can write songs. Don’t be afraid to 74 ▲ . They may comfort some people. A. share your creative works with othersB. follow more positive and believable news C. help those who are influenced by the epidemicD. try yoga, tai chi or other sports you’re interested inE. better understand yourself and let out your emotions(情绪) 75. Write down another way to help you stay cool and calm during the epidemic. (回答不多于6个字) ______________________________________________________________________________ 七、书面表达(本大题有1小题,计20分) 76.北美埃德蒙顿孔子学院(Confucius Institute)的一个游学团计划七月份来诸暨开展夏令营活动,需招聘初中生志愿者若干。游学团成员的基本信息,游学的主要目的见下表。假如你是李华,你想参加这个活动,请结合自身特点和优势,向夏令营负责人Mr. Fizz 写一封申请信推荐自己。 Information Members Primary school students from Confucius Institute in Edmonton (CIE) Time July 10——July 24 Purpose Practice Chinese Learn about traditional culture Go sight-seeing 注意:1.文章应围绕信息表内容展开,并适当增加细节; 2.文中不出现与你身份相关信息; 3.词数:80-100词,短文首句仅供选择使用,不计入总词数。 短文首句: Dear Mr. Fizz, My name is Li Hua, a student from China._____________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ I’m looking forward to your reply! Yours sincerely, Li Hua direct unless patient overcome she 10 九年级英语试卷 第1页(共10页)11

    • 2020-06-18
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  • ID:3-7469263 浙江省绍兴市诸暨市2020届九年级适应性考试数学试题(扫描版,含答案)

    初中数学/中考专区/模拟试题

    12 2020年初中毕业班适应性考试试题 数学 考生须知: 1.本试题卷共6页,有三个大题,24个小题.全卷满分150分,考试时间120分钟 2.答案必须写在答题纸相应的位置上,写在本试题卷、草稿纸上均无效 3.答题前,认真阅读答题纸上的“注意事项”,按规定答题.本次考试不能使用计算器. 参若公式:抛物线y=ax2+bx+c(a≠0的顶点坐标是<2a4) b 4ac-b 试卷I(选择题,共40分) 选择题(本大题有10小题,每小题4分,共40分.请选出每小题中一个最符合题意的选 项,不选、多选、错选,均不给分) 5的相反数是(▲) A.-5 B.5 C 5 2.众志成城,抗击疫情.今年春节新冠肺炎在武汉大肆流行,社会各界纷纷支援武汉.截止1月 31日,武汉共收到社会捐款2586000000元.数字258600000科学记数法可以表示为(▲) A.2586×103 B.2586×10° C.2586×108 D.0.2586×100 3.由6个相同的立方体搭成的几何体如图所示,则它的主视图是(▲) 主视方向 A B C D 4.下列运算正确的是(▲) A.(ab)2=abe B. 2a+36=5ab C.5a2-3a2=2 D.(a+1)2=a2+1 5.一次数学测试,某小组5名同学的成绩统计如下(有两个数据被遮盖) 组员甲乙丙丁戊平均成绩众数 得分8177 82 80 则被遮盖的两个数据依次是(▲) A.80,80 B.81,80 C.80,2 D.81,2 九年级数学试题第1页(共6页) 6.如图,以点O为位似中心,把△ABC放大为原图形的2倍 得到△A'B'C',以下说法中错误的是(▲) A.△ABC∽△A'BC′ B.点C、点O、点C三点在同一直线上 C.AO:AA′=1 D.AB∥A'B 第6题图 7.某中学有一块长30m,宽20m的矩形空地,计划在这块空地上划出四分之一的区域(阴影 部分)种花,某同学设计方案如图所示,求花带的宽度.设花带的宽度为x(m),则可列方 程是(▲) A.(30-x)(20-x)=×20×30 B.(30-2x)(20-x)=×20×30 20m C.30x+2X20x=-×20×30 rm 第7题图 D.(30-2x)(20-x)=×20×30 8.下面是投影屏上出示的抢答题,需要回答横线上符号代表的内容 已知:如图,∠BEC=∠B+∠C. 求证:AB∥CD B 证明:延长BE交★于点F, E 则∠BEC=■+∠C(三角形的外角等于它 不相等的内角之和) 第8题图 又∠BEC=∠B+∠C,得∠B=▲ 故AB∥CD( 相等,两直线平行) 则回答错误的是(▲) A.★代表CD B.■代表∠EFC C.▲代表∠EFC D.●代表同位角 9.如图,四边形ABCD是菱形,⊙O经过点A、C、D,与BC 相交于点E,连接AC、AE.若∠D=80°,则∠EAC的度 数是(▲) B A.20 B.25 C.30° D.35° 第9题图 九年级数学试题第2页(共6页)数学参考答案 一、选择题 题号 1 2 3 4 5 6 7 8 9 10 答案 A B C A A C D D C C 二、填空题 11. 12. 4 13. 14. 15°,105° 15. 16. 三、解答题 17.(1)计算:. = (4分) (2)解方程:. , (4分) 18.(1)50(2分+2分) (2)72°(2分) (3)P= (2分) 19.(答案不唯一)(2分+3分+3分) 20.(1). (4分) (2),,. (2分) ,,. (2分) 21.(1)∵斜坡CM的坡比i=1:3, ∴DM=3CD=6m. (5分) (2)过点C作CE⊥AB,垂足为E, 设BM=x,, ,, , ∴. (5分) 22.点P(a.),,. (1)① 周长=. (4分) ② 面积=,最大值为9. (4分) (2). 最大值为,.(2分) 由对称性可得:. (2分) 综上, . 23.(1)答案不唯一. (4分) 作BC的中线AD, 勾股定理可得:BC=4,BD=2, 则AD=4,∴BC=AD,∴△ABC是“和谐三角形”. (4分) 点M(),N(). 易知△OMN为等腰三角形. ①边MN上的中线等于MN,即 ,N(2,4). (2分) ②边OM上的中线PN等于OM, P(), , , ,N(,). (2分) 综上,N1(2,4),N2(,) . 24.(1)①当∠BDE=∠BFE=45°时,△ABD为等腰直角三角形,BD=AB=6.(4分) ② (Ⅰ) BF=BE. BD平分∠FBE, ∠C=∠FBD=∠EBD=∠BAD, ∴△ABD∽△CBA, , . (2分) (Ⅱ) BF=EF. 连结FD并延长交AC于点H, ∵BD是直径 ∴∠BFD=90° ∵BF∥AC ∴∠AHD=∠CHD=∠BFD=90° ∵BF=EF ∴∠FBE=∠FEB=∠FDE=∠CDH ∵四边形BEDF内接于圆 ∴∠FBE=∠ADH ∴∠CDH=∠ADH ∵DH=DH ∴△CDH≌△ADH ∴CD=AD 可得BD2+62=(8-BD)2 (2分) (Ⅲ) BE=EF. 连结FD并延长交AC于点H, ∵BD是直径 ∴∠BFD=90° ∵BF∥AC ∴∠AHD=∠CHD=∠BFD=∠ABD=90° ∵BE=EF ∴∠FBE=∠EFB=∠BDA ∵四边形BEDF内接于圆 ∴∠FBE=∠ADH ∴∠BDA=∠ADH ∵DA=DA ∴△ADB≌△ADH ∴BD=DH,AH=AB=6 由勾股定理可得42+BD2=(8-BD)2 BD=3 (2分) (2)(提示:连结EF,EM.可得EM垂直平分AF,即EF=AE,利用△BCE∽△ACB得到的值,利用射影定理可得)(4分) 乒乓球 篮球 排球 羽毛球 足球 人数(人) 选修课 5 9 12 10 2 4 6 8 10 12 14 16 0 14 图1:以点A为顶点的直角三角形 图3:以点A为对角线交 点的平行四边形 图2:以点A为顶点的 平行四边形 A A A E D A B C P

    • 2020-06-17
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