在△BCE和△CDF中，BE=CF,EBC=FCD,BC=CD,△BCE△CDF(SAS),:CE=DF.3分（2）如图，过点D作DG⊥AB于点G，连接GF延长GB到点K，使KB=GB，连接KF，KD.4分DGB=GBC=C=90°,四边形BCDG是矩形.BC=CD,四边形BCDG是正方形，:DG=GB=BC=CD=60m.BE=CF,GE=BF.6分由（1)，可得△DGE△GBF（SAS)，DE=GF,DE+DF=GF+DFBG=BK，GBC=90°，BC垂直平分GK，GF=FK,GF+DF=FK+DF....·8分在Rt△DGK中，DK=√DG²+GK²=√60²+120²=60√5m.DF+FK>DK,DE+DF≥60√5m,DE+DF的最小值是60√5m.10分515【九年级数学·参考答案第5页（共5页）】

扫描全能王绝密★启用前试卷类型：A2025年陕西省初中学业水平考试全真模拟（八）数学注意事项：1.本试卷分为第一部分（选择题）和第二部分（非选择题）。全卷共6页，总分120分。考试时间120分钟。2.领到试卷和答题卡后，请用0.5毫米黑色墨水签字笔，分别在试卷和答题卡上填写姓名和准考证号，同时用2B铅笔在答题卡上填涂对应的试卷类型信息点（A或B）。3.请在答题卡上各题的规定区域内作答，否则作答无效。4.作图时，先用铅笔作图，再用规定签字笔描黑。5.考试结束，请将本试卷和答题卡一并交回。号第一部分（选择题级证共24分）考班准一、选择题（共8小题，每小题3分，计24分.每小题只有一个选项是符合题目要求的）的绝对值是A.1B.4C.-4D.42.如图，AB//CD，点E在CD上，连接BC，BE，若BC平分LABE，BED=46°，则C的度数为A.26°AB.23°C.22°D第2题图）D.21°3.计算：6x²y3.（-xy）²=校名A.6xysB.-6xy²C.6xy6D.-6xy学姓4.如图，在菱形ABCD中，点E是边BC上的点，连接AE交BD于点F，若EC=2BE，则的值为（B.C.1D.3（第4题图）5.已知直线y=x+b和y=-x交于点P（-1，1），当x+b≥-x时，x的取值范围为A.x-1C.x≤-1D.x≥-1[2025年中考数学全真模拟（八）第1页共6页]

1、2024-2025学年阜阳三中高二年级第一学期第一次调研考试[ZH240941B]政治试题1、2024年哈三中高三年级下学期第一次模拟考试生物试题1、2024年哈三中高三年级下学期第一次模拟考试生物答案1、2024年哈三中高三年2、吉林省2023~2024(上)高二年级第二次月考(242357D)英语试题foreigners is a tough nut to crack-they speak so fast.W:Yes,it's really common.To keep the conversat3、云南师大附中2023-2024年2022级高二年级教学测评月考卷(三)3历史答案1、云南师大附中2023-2024年2022级高二年级教学测评月考卷(一)1历史试题20212022学年第一学期福州市高三期末测试历史试题参考答案一、选择题：本题共16小题4、郴州市2023年下学期高二年级期末教学质量监测物理答案1、郴州市2023年下学期高二年级期末教学质量监测化学答案1、郴州市2023年下学期高二年级期末教学质量监测生物答案1、郴州市2023年下5、云南省2024-2025学年高二年级 金太阳开学考(25-12B)语文B2答案1、金科大联考·2023~2024学年度高二年级12月质量检测(24308B)地理A2试题1、金科大联考·2023~2024学年度高一年级12月质量检测(24308A

2025届云南名校月考试卷（八）物理参考答案及评分标准一、选择题：本题共10小题，共46分。在每小题给出的四个选项中，第1～7题只有一项符合题目的得3分，有选错的得0分。题号2313678910答案DBACBDCADBDBC1.【答案】D【解析】氙的半衰期为12.5年,经过100年排入海中的氙还剩:m=4×（÷C错误，选项D正确。2.【答案】B【解析】汽车的初速度大小：v。=36km/h=10m/s，由匀变速直线运动的规律可得汽车的加速度Uo~13.【答案】A【解析由开普勒第二定律“面积定律”可知：哈雷彗星从b点运动到d点的时间大于38A正确，选项B错误；哈雷彗星从a点运动到c点的过程中,机械能保持不变，选项C、D铂以。4.【答案】C,选项A错误，选项C正确；物块a和b的向心加速度均为：a=ra"，选项B错误；在a滑动前，摩擦力对a做正功，选项D错误。5.【答案】B【解析】气体发生等容变化过程中对外不做功，根据热力学第一定律：△U=W十Q，可知：Q=△U，选项A错误；气体等压变化过程中吸热Q2，且内能增加也为△U，说明气体对外界做功,根据热力学第一定律可知:Q2>△U,选项B正确；Q=△U

1、安徽省2023-2024学年度高一上学期第二次月考(24031A)语文试题1、吉林省前郭五中2023~2024学年度上学期第二次月考(242351D)生物试题1、吉林省前郭五中2023~2024学年度上学期第二次月考(242351D)生物答2、辽宁省2025届高三金太阳11月联考(126C)地理试题1、辽宁省2025届高三金太阳11月联考(126C)地理试题1、辽宁省2025届高三金太阳11月联考(126C)地理试题1、河南省20243、贵州省2023年秋季学期高三年级期末考试(4245C)历史试题1、玉溪市2023-2024学年秋季学期期末高一年级教学质量检测政治试题1、玉溪市2023-2024学年秋季学期期末高一年级教学质量检测政治答案4、云南省2025届三校高考备考实用性联考卷(二)(白白白白白黑白)地理试题1、重庆市巴蜀中学2024届高考适应性月考卷(六)黑黑白黑黑黑黑化学试题1、贵阳一中(贵州卷)2024届高考适应性月考卷(白黑黑白黑黑黑)x物理试卷答案

历史考试时间75分钟，满分100分注意事项：3.考试结束后由监考老师将答题卡收回。有一项是符合题目要求的。制骨作坊·河制陶作坊墓葬区铜器窑藏坑宫殿区内城区内城垣墓葬区·外郭区铸铜作坊★墓葬区安18东松君基坊地点化选修图2郑州商城布局示意图图1二里头都城遗址平面示意图A.铜器使用得到普及B.社会分工日趋成熟C.神权逐渐超越王权D.城市布局渐成规制奏章等陈规旧例，统称为“故事”。汉顺帝打算册封其奶妈，尚书左雄以查阅“故事”中，没有给奶妈封爵授邑的先例作为劝谏的理由。“故事”在两汉时期A.标志着古代档案制度的成熟B.传承了政治经验和行政规则C.反映了政治决策具有随意性D.体现了儒家思想的独尊地位驿记录，查明案情，判李绍谨归还本利。据此可知，当时A.陆上丝绸之路商贸争讼频繁C.边疆地区已普遍实施郡县制历史试题第1页（共6页）

《双语学习报》2024-2025学年(下)九年级×版·杭州专版第12期中考仿真冲刺（二）听力原文及参考答案听力原文W: 150 dollars for a single ticket and 270第三节第一节： dollars for a return ticket.66. will mind67. its听下面5段对话。每段对话后有一个M: I'll take a return ticket, please.68. children69. to visit小题,从题中所给的A、B、C三个选项中选W: Would you like a window seat, sir?70. dangerous71.off出最佳选项,并标在试卷的相应位置。听完M: Yes, a window seat, please. I like to look72.if73. Secondly每段对话后,你都有10秒钟的时间来回答at the clouds in the sky.74. the75.provide有关小题和阅读下一小题。每段对话仅读W: OK. And when will you come back?第四部分：一遍。M: Next Monday in the afternoon.【写作指导】1. M: Where are you going for your holidayW: There is a flight from London at 3 pm. Is1.任务分析with your family?the time right for you?本次书面表达要求描述自己对未来的展W: We haven't decided yet. But myM: That's great. I'll take the ticket.望。brother wants to climb the mountains.听下面一段独白，回答第11至第15主题：人与自我生活与学习 2. W: Did you watch the movie last night?五个小题。文体：记叙文M: Sure. It is the most interesting one that (M) Now I'd like to tell you something时态：以一般现在时和-一般将来时为主I've ever seen.about my day at school today.人称：以第一人称为主3. M: Have you tried the new swimming pool?At 6:00 am, I went to school with my elder2.行文布局 It is great.sister, Johanna, who's in the same school本篇书面表达可按照以下框架完成。W: I plan to go there on Friday. Yesterdaywith me. It is three blocks from my house, so开头:引出主题,表达对未来的总体看法I promised Tom that I would go there I walk to school every day. The classes I had主体：从各个方面展望自己对未来的规划with him. today were Spanish, math, science and life结尾：总结对未来的信心和努力方向M: I went there last Saturday. The watereducation. Spanish is my favorite class.3.句型结构was very clean and there were not At 11:50 am, classes ended and I went引出主题： many people.home for lunch with Johanna. We had rice4. M: I'm sorry I didn't go to your birthdayIn my eyes, the future is full of hope.and chicken soup. Sometimes we have lunchparty. How was it?in our yard, but today we ate inside becauseI believe the future will be bright and fullW: Not bad, Mike. Many people came andof the heat outdoors.of opportunities. I got a bike from my parents.At 1:00 pm, I went back to school for band描述理想的职业：M: What did Andy give you?practice. We practice for two and a half hoursMy dream is to become a/an ... (scientist/W: Andy gave me a wallet. By the way,every afternoon. We need to prepare for thedoctor/teacher).thanks for your watch. I really like it.band competition. My friends and I play theI want to ... (invent new technologies/help 5. M: I don't want to eat anything. I have adrums, and the girls dance. Band practice ispeople/explore the world).stomachache.my favorite part of the day.说明对社会的贡献：W: Don't worry, Lee. Let's go to see theAt 4:00 pm, I played soccer with some ofI hope to help society by .. (creatingdoctor right now.my classmates at school. My favorite sport issolutions/improving lives).第二节：soccer, and my favorite soccer team isFor example, I want to develop ... (clean听下面3段对话或独白。每段对话或Barcelona.独白后有几个小题,从题中所给的A、B、C参考答案谈谈对生活的期待：三个选项中选出最佳选项，并标在试卷的(One possible version 客观题除外)In my personal life, I hope to live a相应位置。听每段对话或独白前，你有时间第一部分：(balanced/happy/healthy) life.阅读各小题,每小题5秒钟。听完后,各小1-5 CABCB6-10 CCABCI will keep learning and growing, while题将给出5秒钟的作答时间。每段对话或11-15 BBACBstaying close to my family and friends.第二部分：独白读两遍总结与展望：听下面一段对话，回答第6至第7两16-18 ADA19-22 BBACI believe the future is bright, and I will个小题。23-26 CACB27-30 BACDwork hard to achieve my dreams.M: I hear you did some volunteer work in31-34 DBCEI hope to make a positive impact on theThailand, Jane. 35. I agree with Bill's because sad endingsworld while living a happy life.W: Yes, I went there last summer vacation. It help me understand real life. They teach【范文展示】was a wonderful experience. me how to deal with difficult felings andThe Future in My EyesM: Where did you volunteer in Thailand?care about others. / I agree with Alice'sIn my eyes, the future is full of hope.W: In a small village far away from the capital.because happy endings make reading fun.My dream is to become a scientist. I wantM: Then what did you do there?They make me feel good and encourageto invent new technologies to solve environmentalW: I taught children English at a primaryme to read more books.第三部分： problems, like pollution and climate change,school. and make the world a better place. Ihope toM: What do you think of the people there?第一节36-40 CADBChelp society by creating solutions that improveW: They are very friendly. I had a good time41-45 ADCDBpeople's lives. For example, I want to developthere.46-50 BCADAM: Would you like to go to Thailand again?第二节 clean energy sources that are cheap and easyW: Yes. Although volunteering there is a little 52. are given for everyone to use. In my personal life, I51. wealthdifficult, I think it is meaningful. 53. receiving 54. in front of hope to live a balanced and happy life. I will听下面一段对话,回答第8至第10三 55. pairs 56. millionkeeplearningandgrowing.whilestaying个小题。 57. around 58. climbingcloseto my familyandfriends.StrongM: Good morning, madam. What time is the59. traditions 60. planrelationships are the key to happiness.next flight to London?61. useful 62. marketsI believe the futureisbright, andI will workW: At 10 am. 63. support 64. naturehard to achieve my dreams while making aM: How much is the ticket? 65. understand positive impact on the world.

B卷绝密★启用前2025年普通高等学校招生全国统一考试高考点晴卷英语答案解析网注意事项：答案解析网1.答卷前，考生务必将自己的姓名、考生号填写在答题卡上。答案解析网2.回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。如需改号动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上，写在本试生考卷上无效。答案解析网题3.考试结束后，将本试卷和答题卡一并交回。答案解析网····.答第一部分听力（共两节，满分30分）做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的号要位答案转涂到答题卡上。答案解析网座·····第一节（共5小题；每小题1.5分，满分7.5分）答案解析网不听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项。····.听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。内····.例：How much is the shirt？答案解析网姓名A. 19.15.B. 9.18.C.9.15.答案解析网线···.答案是C。.答案解析网 答案解析网1.What does the woman want to do？答案解析网A.Change her major.答案解析网班级B. Drop out of college.答案解析网C.Continue studying history.答案解析网2. What is the probable relationship between the two speakers?答案解析网A.Teacher and student.答案解析网学校B.Librarian and student.答案解析网C.Manager and customer.答案解析网3. How long will they have to wait?答案解析网A.15minutes.答案解析网B.30 minutes.答案解析网C. 45 minutes.

1、上进联考 2023-2024学年第一学期高二年级期末测试生物试题1、上进联考 2023-2024学年第一学期高二年级期末测试物理试题1、[上进联考]2023-2024学年第一学期高二年级期末测试(1月)化学试题

按秘密级事项管理★启用前2025年广东省普通高中学业水平选择性考试化学冲刺卷（一）广东新高考研究中心本试卷共100分考试时间75分钟注意事项：1.答题前，考生务必将自己的姓名、准考证号填写在答题卡上。2.回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。弥如需改动，用橡皮擦干净后，再选余其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。3.考试结束后,将本试卷和答题卡一并交回。可能用到的相对原质量：H1C122 N14 O 16S32 Fe 56 Ni 59、选择题：本题共16小题，共44分。第1~10小题每小题2分；第11~16小题，每小题分。在每小题给出的四个选项中，只食一项是符合题目要求的。1.我国是一个多民族国家，各个民族均有其独特的文化。下列民族民俗相关文物的主封要成分属于硅酸盐的是B.珞巴族圈点纹铜C.藏族黑陶带流茶罐A.鑫族祖图局部D.哈尼族竹脚铃2.近年来，我国汽车的自主研发及生产得到快速发展下列关于汽车的说法正确的是A.所使用的轮胎通过加人硫化剂，让橡胶形成了硫键以提高其性能B.所使用的车载智能芯片的主要成分为SiO2线C.所使用的三元锂电池是通过锂单质的燃烧提供电能的D.所使用的雾灯能发出黄色的光利用了钾蒸气放电发光校3.化学与医疗息息相关。下列说法不正确的是学A. 用含C的药物检测幽门螺旋杆菌:1²C与²C互为同位素B.用 BaSO4 作胃肠道检查的造影剂:BaSO4 难溶于 HCIC.用高分子分离膜进行血液透析：透析过程属于物理变化D.用氨气制造核磁共振所需的超低温环境：氮气的电子式为He：He4.我国菜系因地理、气候、习俗的不同而形成了不同的地方风味。下列说法不正确的是A.川菜鲜香麻辣,藤椒中风味物质之一的乙酸苯乙酯属于烃类化学卷（一）第1页（共8页）[25 · (新高考)CCJ · 化学·G DONG]O