四川省成都市2017届高三第二次诊断性检测

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2020年成都市2017级高中毕业班第一次诊断性检测数学试题和答案(文理)

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高考历史一轮复习第76练唯物史观备考加分练-人教版高三全册历史试题

第76练唯物史观1．战国时，赵豹警告赵王应避免与秦国对抗，理由是“秦以牛田……不可与战……”。

材料反映了( )A．秦赵应世代交好永不交战B．牛耕在战国时已普遍使用C．先进生产力促进了国力的强盛D．赵国爱好和平反对战争的理念2．(某某市2017届第二次诊断性考试，26)唐前期，府兵制盛行。

府兵即民兵，征自分得一定土地的丁男，平时务农、练兵，战时自筹资粮出兵。

唐中期变府兵制为募兵制，募兵即职业兵，即由政府招募丁男入伍，供其资粮，免其赋役，直至退隐。

募兵制取代府兵制反映了( )A．地方割据严重威胁中央B．小农赋役负担的减轻C．政府财政危机逐渐消除D．国家可支配土地的不足3．(某某市2017届第二次质量检测，27)徐光启《农政全书》记载：“土芋，一名土豆，一名黄独。

蔓生叶如豆，根圆如鸡卵，内白皮黄……煮食、亦可蒸食。

又煮芋汁，洗腻衣，洁白如玉”。

此说法成为土豆传入中国的重要证据。

据此可以得出的结论是( )A．孤证不立，该书不能成为土豆传入的证据B．土豆传入有利于经济社会的发展C．中外贸易扩大推动了土豆的传入D．当时国人物质生活深受西方影响4．(某某市2018届第一次模拟考试，29)两次鸦片战争中，中国被迫约开商埠16处。

西方的市政管理，经济模式的传入，使这些开放在沿海、沿江的商埠，最先脱出中国传统政治城市的模式，被视为城市近代化的起始点。

这反映了( )A．西方扩X是近代中国各种变化的主导因素B．西方资本主义侵略对中国产生建设性影响C．中国近代化城市被卷入资本主义世界市场D．最先近代化的沿海城市成为列强侵华基地5．(某某市2018届毕业班联考二，28)葛剑雄认为，“按照《天朝田亩制度》所宣布的目标，太平军运动确实是一场深刻的社会革命”，但他同时又说，“太平军制度不可能在长时期内制止私人财富的积累和特权的膨胀”。

这说明“太平军制度”()A．削弱了国家在社会经济中的权力B．旨在利用分配制度消灭经济竞争C．废除小农经济难以制止私产膨胀D．是导致太平天国运动失败的根源6．(某某、某某、内江、眉山四市2017届第二次诊断考试，29)白话文在维新变法时期就得到了充分重视。

四川省成都市2013届高三第二次诊断性考试英语 (word版)

成都市2013届高中毕业班第二次诊断性检测英语本试卷分选择题和非选择题两部分。

第I卷(选择题)1至9页，第II卷(非选择题)10至12页，共12页;满分150分，考试时间120分钟。

注意事项：1. 答题前，务必将自己的姓名、考籍号填写在答题卡规定的位置上。

2. 答选择题时，必须使用2B铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦干净后，再选涂其它答案标号。

3. 答非选择题时,必须使用0.5毫米黑色签字笔，将答案书写在答题卡规定的位置上。

4. 所有题目必须在答题卡上作答，在试题卷上答题无效。

5. 考试结束后，只将答题卡交回。

第I卷(选择题,共90分）第一部分英语知识运用(共两节，满分40分）第一节语法和词汇知识(共10小题;每小题l分，满分10分）从A、B、C、D四个选项中，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。

1. —Can I have an apple, Uncle Pal?—______. An apple a day keeps the doctor away.A. It doesn‟t matterB. It‟s a dealC. Y ou‟re welcomeD. Help yourself2. As the road to the airport is under reconstruction, we‟d better ______early to avoidthe traffic jam,A, pay off B. set off C. put off D. take off3. On seeing ______gift they wanted ，the kids screamed with ______delight.A. /; aB. a；theC. the；/D. the；a4. Up to now, thousands of red phone boxes, the old image of Britain, ______ due tomobile phones.A. removedB. have removedC. were removedD. have been removed5 ______all the homework assigned by the school the students have to work at it till midnightA. CompletingB. To completeC. Having completedD. To have completed6 The Charles Dickens Museum in Doughty Street is the only one of his Londonhomes to survive，______he wrote Oliver Twist.A. whereB. thatC. whichD. what7. When I ______home, I caught a thief stealing from a passer-by.A. headedB. was headingC. has headedD. had headed8. —What are you two whispering about over there?—Oh, ______. Just small talk.A. noB. nobodyC. noneD. nothing9. —Where did you get this book?—I picked it up from a second-hand bookshop if you ______know.A. mustB. willC. canD. shall10.I couldn't imagine ______difficult it was for these badly injured victims to make it to the hospital.A. whenB. howC. whatD. where第二节完形填空(共20小题；每小题1. 5分，满分30分）阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该选项涂黑。

中学生标准学术能力诊断性测试理科综合科目试题

个直径为 R 的小球放在相距为 d=2R 的地方，则挖去部分与剩余部分的万有引力为（）
A.2W
B.6W
C.10W
D.20W
18.太阳风暴发生时，会抛射出大量高能量的带电粒子，它们最快十几分钟就
第2页共7页
能到达地球，这些高能粒子的穿透能力很强，对航天器有一定的破坏性。由于质子占了总粒子数的 90%以上，因此这种事件称为太阳质子事件。则下列关于太阳质子事件的说法中正确的是（） A.地球同步卫星比近地卫星受到的影响更大 B.地球赤道附近的居民比北极圈附近的居民受到的影响更大 C.质子事件中，质子的高能量来自于太阳内部的核裂变反应 D.大气层对宇宙粒子有一定的阻挡作用，所以北京地区在夜间可观察到高层大气被高能质子激发或电离后发出的绚丽的荧光 19.中国书法是一种艺术，它历史悠久，是中华民族的标志之一。某同学用毛笔练习书法，从基本笔画“横”开始练习。在楷书笔画中，长横的写法要领如下：起笔时一顿，然后向右行笔，收笔时略向右按，再向左上回带。该同学在水平桌面上平铺一张白纸，为防止打滑，他在白纸的左侧靠近边缘处用镇纸压住。则下列关于行笔过程中各物体的受力情况中说法正确的是（） A.毛笔对纸的压力一定大于毛笔的重力 B.镇纸受到了向右的静摩擦力 C.白纸受到了 2 个摩擦力 D.桌面受到了向右的摩擦力 20.在如图所示的电路中，R1 是定值电阻，R2 是滑动变阻器，RT 是热敏电阻，温度升高时，RT 的电阻值减小，D 为理想二极管，正向电阻为 0，反向电阻为无穷大，电源的电动势为 E，内阻不计。在室温为 20℃时，接通开关 S，质量为 m 的带电油滴恰能静止在水平放置的平行板电容器的两个极板之间。若只改变其中的一个条件，则下列说法中正确的是（）
7.下列有关碳酸氢钠说法正确的是（）

高三英语质量分析报告

成都电子信息学校英语试卷质量分析报告为了更好的检测2017届高三学生的英语学习状况，我校参加了由四川省教科所组织的“四川省中等职业学校2017届学生文化课诊断考试”。

该套试题和高考试题题型相同，满分100分。

题型包括单选、语言运用、阅读、补全对话、翻译、作文，考试时间为120分钟。

一．试卷总体评价本次英语诊断考试试卷，在考查学生基础知识的同时，重点考查了学生的综合语言运用能力，试题题量适中、梯度明显、突出语篇、强调应用，注重考查学生能力，较好的体现了四川省2016年职教对口高考英语《考试大纲》中的命题原则和要求，其主要特点如下：1．基于考纲，以基础知识和能力考查为核心。

单项选择中的语境应用题增加；语言运用的选项难度比16年高考试题稍有增加；阅读理解部分的推理判断题和主旨大意题增加，还出现了难度较大的理解文章结构的题。

2.语言材料新颖，具有很强的时代性和人文性。

阅读理解B篇QQ空间发表的旅游说说；C篇有钱任性、难受、香菇，设立一个小小的目标；D篇家用电器的安全须知；等等，都让这套试卷洋溢着鲜明的时代气息。

3.重视基础知识，强调语言的活用能力.试卷中的单项选择、语言运用题都注重在特定语境下考查词汇和语法的用法，而且语法覆盖面较广。

阅读理解出题立意较好，立足语篇层次的归纳推理题占了一定的比例。

整套试题以考查基础，培养信心，查漏找缺为主，较好地契合了第一轮复习的特点。

4．写作部分有难度。

全卷难度为，在容易题，中等题和难度题的构成上，中等题占了较大比例。

但是写作部分，写通知有些学生词汇较少，不知道会议中心、讲座如何表达，格式是第一次要求，所以失分较多，拉开了学生的得分档次。

二．我校试卷平均分情况表和各小题得分情况表双流电子信息学校平均分、最高分、最低分表(英语)双流电子信息学校题目分析报表(英语)三、各试题分析1、单项选择本大题注重在特定语境下的词义辨析能力的考查，突出综合性和语境化特征。

考查内容有数词、冠词、动词、名词、形容词、副词和动词词组，情景对话，且按题号有序排列，布局清晰，考点突出。

成都市青白江区初2017级(2019~2020学年度下期)第二次诊断性试题附答案及评分标准

青白江区初2017级“第二次诊断性”检测英语注意事项：1.全卷分A卷和B卷, A卷满分100分, B卷满分50分; 考试时间120分钟。

2.在作答时, 考生务必将自己的姓名、准考证号涂写在试卷和答题卡规定的地方。

3.选择题部分必须使用2B铅笔填涂; 非选择题部分必须使用0.5毫米黑色墨水签字笔书写, 字体工整、笔迹清楚。

4.请按照题号在答题卡上各题目对应的答题区域内作答, 超出答题区域书写的答案无效; 在草稿纸、试卷上答题无效。

5. 保持答题卡清洁, 不得折叠、污染、破损等。

A卷(共100分)第一部分听力测试(共30小题, 计30分)一、听句子,根据所听到的内容选择正确答语.每小题念两遍.(共5小题;每小题1分,计5分)1. A. Me, too. B. See you. C. You're welcome.2. A. Sorry, I won’t. B. No, I can't. C. Sounds good.3. A. Oh, I see. B. All right. C. Yes, it is.4. A. You're so kind. B. Yes, please. C. My pleasure.5. A. Yes, he is. B. Not really. C. He’s tall.二、听句子, 选择与所听句子内容相符的图片.每小题念两遍.(共5小题;每小题1分,计5分)A B C D E6. 7. 8. 9. 10.三、听对话,根据对话内容及问题选择正确答案.每小题念两遍.(共10小题;每小题1分,计10分)11. A. a climber. B. a gift. C. a movie.12. A. At home. B. In the hospital. C. At school.13. A. Play soccer. B. See the dentist. C. Finish the book.14.15. A. 18. B. 15. C. 14.16. A. Helen. B. Jack. C. Jenny.17. A. 15 minutes. B. 30 minutes. C. 45 minutes.18. A. By bus. B. By bike. C. On foot.19. A. To the nature museum. B. To the art museum. C. To the science museum.20. A. 30 dollars. B. 40 dollars. C. 60 dollars.四、听短文,根据短文内容选择正确答案.短文念两遍.(共5小题;每小题1分,计5分)21. When did Alfred arrive at the theater?A. At 6 pm.B. At 6:30 pm.C. At 7 pm.22. Why did none of Alfred,s friends answer his phone?A. They didn't hear his phone.B. Their phones were busy then.C. They wanted to give him a surprise.23. Where did they meet?A. Outside the theater.B. Inside the theater.C. At a gift store.24. How did Alfred feel when he saw his friends?A. Surprised.B. Upset.C. Happy.25. What made Alfred's birthday unforgettable?A. The action movie.B. The wonderful gifts.C. His friends’ unexpected acts.五、听短文,根据短文内容完成图表中所缺信息.短文念三遍.(共5小题;每小题1分,计5分)26. 27. 28. 29. 30.第二部分基础知识运用(共30小题,计40分)六、选择填空(共15小题,计20分)A. 从以下各题的A、B、C三个选项中选择正确答案.(共10小题;每小题1分,计10分)31. -- Who lives in apartment called Happy Time on Bridge Street in my class?-- Tom does.A.aB. anC. the32. The boy didn’t realize his mistake the teacher had a long talk with him.A. untilB. becauseC. after33. milk and cheese, we also need some vegetables and fruit for our salad.A. ExceptB. WithoutC. Besides34. The factory we'll visit next week is not far from here.A. whoB. whereC. which35. We need to a plan to tell all the students about our English Festival.A. look forward toB. come up withC. fall in love with36. Jack has just had lunch. He be hungry now.A. can'tB. mustn'tC. needn’t37. She really loves reading. Every year plenty of his pocket money in buyingbooks.A. will be spentB. was spentC. is spent38. An art show will be held in June in Chengdu Art Museum, but knows thedate for sure.A. NobodyB. everybodyC. somebody39. --Did you see Mr. Brown yesterday afternoon?-- No. When I got to school, he .A.leftB. had leftC. has left40. -- Miss Gao, can you tell me ?-- Yes, Just as President Xi says, “happiness is achieved through hard work.”A. how we can find happinessB. when we can find happinessC. who can help us find happinessB. 补全对话根据对话内容从方框中选择句子补全对话(共5小题; 每小題2分,计10分)A: Hello, Mary, you don't look well. What's up?B: Oh, I'm very busy and tired.A: 41B: We are going to have the graduation exam next week, but I'm not ready for it.A: 42 You have been studying hard, I know.B: But I'm still not sure of myself.A: 43 That will help you relax.B: That sounds good. 44A: And you should go to bed as usual and have a good sleep.B: 45七、完形填空. 阅读下面两篇短文,根据短文内容,从A、B、C三个选项中选出可以填入空白处的正确答案,(共15小题,计20分.A篇每小题2分,计10分;B篇每小题1分,计10分)AIn 20 years, I think I'll be a newspaper reporter. I will live in Shanghai, because there will be more jobs in that city. As a reporter, I think I will 46 lots of interesting people, so I'll have more friends. I will have 47 pets, though, because I'll have less free time. And my apartment will be no 48 for pets because it'll be too small. So I will probably just keep a bird. 49 the week, I'll wear smart clothes On the weekend, I'll look less smart 50 I'll be more comfortable. In the future, people will work more so they will probably have fewer vacations, but I think I'll take a holiday in Hon Kong when possible. One day I'll even go to Australia.46. A. invite B. meet C. thank47. A. fewer B. more C. better48. A. useful B. good C. harmful49. A. Before B. After C. During50. A. but B. so C. orBIt was last June. I entered a supermarket when a young man asked me, “Can you tell me where the milk counter(柜台)is?” “well, it's in the right corner;” I replied. Picking up my things, I came to the milk counter and saw the same man 51 almost 10 bottles of milk. I asked, “Do you need a trolley (手推车)?” “Sure, thank you. “he answered. I was 52 he was still picking and after a while his trolley had 24 bottles of milk. “Why so many bottles?” I asked, “Oh, these are for my street dogs. Today, I want to be a Santa for them.” He smiled. “Well. it's too 53 for you to be a Santa. It is still June.” I said. He 54 at me and walked a few steps, It seemed he wanted to say something but he left without a word. 55 , we met again at the bread counter. “So these bread and cakes are also for the street dogs, Mr. Santa.” He smiled. “Yes. These are also for them and I love to be Mr. Santa in, June. Santa is a symbol of surprises and 56 . He comes in December as we 57 him around Christmas. But in real life there is a Santa in each one of us that shines through our personality at some point of time, Maybe when you offered me a trolley, there was a 58 Santa in you. When we offer food to a hungry man or a(n) 59 to someone caught in the rain, we are being Santa there.”He left and I was happy that I had met him. Santa can come before Christmas. We just need to realize that he is around us by 60 happiness and unconditional love.51.A. putting B. choosing C. holding52.A. surprised B. excited C. sad53.A. easy B. early C. helpful54. A. turned B. laughed C. pointed55. A. Suddenly B. Luckily C. Hopefully56. A. love B. success C. friendship57. A. call B. show C. expect58. A. lost B. hidden C. forgotten59. A. camera B. umbrella C. apple60. A. storing B. increasing C. spreading第三部分阅读理解(共15小题; 计30分)八、阅读下面短文,根据短文内容判断句子的正误.正确的涂”A”, 错误的涂”B”.(共5小题; 每小题2分, 计10分)The Sydney Opera House is a very famous building inthe world. It has become Sydney's best-known landmarkand international symbol. The Opera House with a “sailingroof” was designed by a famous Danish architect(建筑师), Utzon. The base of the building was started in 1959, years before the designs were finished. Utzon spent four years designing the Opera House. In 1962, the designs were finalized(定稿)and the construction began In 1967, they started the decoration inside. It took 14 years in total to build the Opera House. Queen Elizabeth II officially opened it on October 20th, 1973.The Sydney Opera House cost around s100 million and was paid for by the public. 6, 225 square meters of glass was use to build it. The Opera House includes 1, 000 rooms. It is 185 meters wide. The building's roof sections weigh about 15 tons. Each year, this fantastic building attracts 200, 000 tourists to come for a visit or enjoy events in it.The Opera Louse reaches out into the harbor. It is amazing and unforgettable, offering people a strong sense of beaut.61. The designer of the Sydney Opera House was a famous Danish architect.62. Bunking the Opera House lasted from 1962-1973.63. The public donated money to build the Sydney Opera House.64.Tourists pay a visit to the Opera House only for its fantastic beauty.65.The passage is mainly about how the Sydney Opera House was built.九、阅读下面两篇短文,根据短文内容选择正确答案.(共10小题;每小题2分,计20分)AThe baby elephant, Sheila, was moved out of Belfast Zoo because of fears she might be hit by bombers(轰炸机) during the Belfast Blitz(闪电战)of 1941.She was one of the lucky ones. A lot of the animals were killed because of fears they might run away and attack people during the bombing. They included a tiger, a black bear, a wolf, and two polar bears.But Sheila was walked down the road by zoo-keepers to a nearby house where a woman took her in and kept her in her backyard for several months until the bombing was over.No one knows the woman's name and the zoo knows her only as “the elephant angel”. As the zoo celebrates its 75th birthday, people have decided to try to find the elephant's saver. Mark Challis is the manager of Belfast Zoo. He explained a bit more about Sheila's story.“Well, we know that Sheila spent some time living with a lady near to the zoo and we have one sweet photo, you can see it on our zoo website.”“In the photo you can see the elephant with the lady in her back garden and that's almost all we know. So we're just trying to find more information and we are not even sure if the lady is alive today, but maybe her relatives or somebody will recognize the back of that house and we can fill in details on this story.”Once the bombing was over, Sheila went back to the zoo and lived for another quarter of a century. She died of a skin disease in 1966.66. What happened to those unlucky animals in the zoo before the bombing?A. They were taken to a safe place.B. They started to attack people.C. They were killed.67. Which of the following is true according to Paragraph Three?A. The zoo-keepers walked the elephant to a nearby house.B A lady walked the elephant and kept her in the backyard.C. The elephant ran away and a lady found her finally.68. What information do people have about “the elephant angel”?A. She owned a zoo website.B. She used to live close to the zoo.C. She is still alive.69. Why was the photo posted on the website?A. To attract more visitors to the zoo.B. To celebrate the zoo's birthday.C. To find “the elephant angel”.70. What caused the elephant's death?A. A kind of illness.B. An accident.C. A bombing.BCalvin waited outside Trudy,'s bedroom. Then it happened--a scream, a very loud scream. Calvin ran to his room and threw himself into bed.He heard Mama coming down the hall.“Did you do this?” his mother asked. Calvin looked out from under the covers. His mother stood over him, holding a rubber spider.“Do what?” he asked.“You put that thing in my bed,” Trudy told him, stepping out from behind Mama.“Don't think that just because it's your birthday you can get away with something like this,” Mama scolded(责骂).“You do want your present, don't you?” That swept the smile off Calvin's face.“ Course I do,” he said.“Then you apologize(道歉).”Calvin dropped his head. “Sorry Trudy,” he muttered(嘟囔).“Here,” Mama said. “Happy birthday.” At the breakfast table she handed Calvin an envelope. Inside were tickets to the show of Lomax the Magnificent, the world-famous magician. “You've got two tickets there,” Mama said, “and I knowsomeone who'd really love to go along.” She smiled at Trudy.“You don't mean here, do you?” Calvin asked, eyeing his little sister.“Well, that would be really nice. But those tickets are yours. If you want to ask somebody—” Calvin didn’t wait for his mother to finish. He rushed out of the house to call Rodney, his pal next door, that the two of them were going to see Lomax the Magnificent.71. Who screamed at the beginning?A. Calvin.B. Calvin’s sister.C. Calvin's friend.72. Calvin apologized to Trudy .A. unwillinglyB. trulyC. happily73. Calvin received his present .A. in the dining roomB. in his bedC. inside the theatre74. Calvin's mother wanted Calvin to .A. ask his friend to the showB. find out what his friend thoughtC. do what she thought was right75. What is the best title for this passage?A. Trudy’s SpiderB. Mother’s TicketsC. Calvin’s BirthdayB卷(共50分)一、补全单词, 根据首字母及句意写出完整单词.(共5小题;每小题1分,计5分)1. The match is full of the u . We really don't know which team will win.2. It has not been rainy for long. We can see the b of the river now.3. Amy is an i to all who knows her. She built herself a house out of rubbish.4. We can’t a to upset such an important customer.5. Have you ever r talking back to your parents in a rude way?二、完成对话, 在空格中填上适当的单词,使对话完整正确,一空一词(含缩写词)(共10小题; 每小题1分,计10分)A: You look sad, Cindy!B: Yeah. We are at the end of our junior high school and it's time to say goodbye to everyone. I just feel sorry to be 1 from my friends and teachers.A: How time flies! Who would you most like to thank in the past three years?B: I'd like to thank 2 groups of people.A: I guess your friends must be one of them.B: Yes, sure! I've learnt the 3 of friendship.A: You must have had a wonderful time with your friends!B: Of course. We’ve worked hard and even faced some 4 times, but we’ve also had a lot of fun. 5 many of us will go to different new schools, our friendship will last forever without stop.A: I agree. A life without friends is like a day without sunshine. But friends don't have to see each other all the time. Sometimes the friends you treasure most are the friends you see least 6 . What about the second group?B: They are my parents. 7 a clean and comfortable environment at home for me where I feel both safe and relaxed, and where I can prepare myself for my school days.A: That's true. When we are 8 . they always cheer us up.B: Besides friends and parents, I thank all my teachers. I'll never forget their kindness and patience. They are so 9 that I believe there are no questions that they can't answer They go out of their way to make me study well and I've made a great progress this term.A: Me, too. I will forever thank teachers for supporting me to be a 10 self.三、短文填空, 从下面方框中选出10个单词,将其正确形式填入短文,使短文意思正确通顺(每词限用一次).(共10小题; 每小题1分,计10分)I felt a little bit worried when I woke up this morning. Too many 1 thingshappened and I needed to make many decisions. I decided to go to the park for a walk and try to relax.On the way, I kept repeating to 2 , “Don't stop being kind.” Others may have 3 situations than me. I already felt better when I was walking in the park and enjoying the beautiful trees and the smiles to and from 4 . I decided to go shopping on my way back.After paying, I sat down for a while and got a coffee. An elderly man sat next to me and started talking very 5 .I noticed that he had hearing aids in both ears. He had a coffee too. I tried talking with him but I realized he could not understand anything. I stayed anyway and he told me about his 6 with hearing, his son who worked in the age of 89! He felt happy to still be able to do the shopping on his own. He said he liked talking to people and he said sorry many times. I told him it was lovely 7 to him and after a while I said goodbye, 8 his hands and wished him a good day. He was so happy and 9 He thanked me many times and the last thing he said was “Thank you for 10 ”. I thought the whole point was “I just stayed and listened.”四、阅读表达(共10小题计10分)A. 补全短文根据短文内容,从短文后的A-F选项中,选出5个适当的选项补全短文.(共5小题;每小题1分,计5分)“Feel bored staying at home? So does the virus. 1 “This is how Zhang Wenhong advised people to stay indoors during the outbreak of COVID-19(新冠肺炎). As the head of the Shanghai expert team, Zhang has become an internet celebrity (名人) due to his funny and straightforward way of talking.He first caught people's attention in late January, when he asked the members of the Communist Party(共产党员) in his department to go to the front line hospitals. “When becoming Party members, we vowed(发誓) that we would always put people's interests first,” Zhang said. “This is the moment we live up to the vow. 2No bargaining(讨价还价).” His determination and the way of speaking quickly won praise across the country. 3 “I do it in person because I need to encourage other coworkers,” he told the media.Zhang believes in the traditional Chinese idea that “the best doctors prevent the disease.” That’s why he spares no efforts in spreading scientific knowledge on how to prevent the epidemic(流行病). 4 He and his team also update their WeChat account every day with timely analyses(分析)of the epidemic. One of his articles got more than 10 million hits. But Zhang might not care about his sudden fame. When asked about his feelings after becoming famous, Zhang told the media, “ 5 Pay attention to Wuhan. I'm not a celebrity. I'm a doctor.”B. 完成图表根据短文内容,完成图表中所缺信息.(共5小题; 每小题1分,计5分)Which animals are smart? Your answer may be dogs, monkeys or elephants. Now we can put one more animal into the list: sheep.Scientists from Cambridge University said that they can teach sheep to tell familiar(熟悉的)human faces from other unfamiliar ones.Before testing, scientists let the sheep take a look at pictures of four famous people, such as Barack Obama and British actress Emma Watson. Then the sheep went into a room with two computer screens. Each screen showed a human face. One screen showed a famous person and the other screen showed a common person. The sheep would always walk to the screen with the face of famous persons.Then, the scientists wanted to know the sheep's ability to recognize(认出) them from a photo. They put their own photos on screens along with some pictures of unfamiliar(不熟悉的) faces Not surprisingly, the sheep could tell the scientists from others.After noticing the animals’ ability to recognize people, scientists gave them a new job. They wanted to see the farm animals' ability to recognize the same person if the picture only showed half of the person's face or just one side of a person. The animals were still able to recognize them, though they were a little slower to recognize the pictures than before.The results show that the animals' face-recognition(面部识别)abilities are similar to those of monkeys and humans. Face recognition is a difficult job. But sheep have big brains(大脑). When they see other sheep, they can also recognize one another.The scientists said it might be interesting in the future to find out whether sheep can recognize different human facial expressions(表情).1. 2.3. 4.5.五、书面表达(计15分)假如你叫李华，今年由于新冠肺炎爆发，学校延迟开学，学生居家抗击疫情。

2017级成都市高三第一次诊断性检测数学试题(理科)

成都市2017级高中毕业班第一次诊断性检测数学（理科）本试卷分选择题和非选择题两部分。

第1卷（选择题）1至2页，第lI卷（非选择题）3至4页，共4页，满分150分，考试时间120分钟。

注意事项：1. 答题前，务必将自己的姓名考籍号填写在答题卡规定的位置上。

2. 答选择题时，必须使用2B 铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦千净后，再选涂其它答案标号。

答非选择题时，必须使用05毫米黑色签字笔，将答案书写在答题卡规定的位置上。

4. 所有题目必须在答题卡上作答，在试题卷上答题无效。

5. 考试结束后，只将答题卡交回。

第1卷（选择题，共60分）一、选择题：本大题共12小题，每小题5分，共60分．在每小题给出的四个选项中，只有一项是符合题目要求的．1若复数Z 1与Zz =-— (i 为虚数单位）在复平面内对应的点关于实轴对称，则Z1=CA)-—i (B)-3+ (C)+i (D)—!2.已知集合A={—1,0,m},B={l ,2}. 若A U B = {-1,0,1,2}, 则实数m的值为(A)-1或0(B)O或1CC)—1或23.若si n e =乔cos(2穴-0),则tan20=石乔瓦CA)——CB) -CC)—一 2 4.某校随机抽取100名同学进行“垃圾分类”的问卷测试，测试结果发现这100名同学的得分都在[50,100]内，按得分分成5组：[50,60), [60, 70), [70, 80),[80,90),[90,100], 得到如图所示的频率分布直方图则这100名同学的得分的中位数为CA )72. 50.040 0.030 数学（理科）”一诊“考试题第1页（共4页）CD)l或2CD)-污2 彗0.015 (B )75 0.0100.005 (C)77. 5(D)80。

工丑扫已。

100得分5设等差数列{a ,}的前n项和为S,,,且a ,,-::/:-0.若as =a 3, 则—＝s 9 S s 9 5 5 (A)了(B)了(C)了6已知a,/3是空间中两个不同的平面，m,n是空间中两条不同的直线，则下列说法正确的是(A)若m II a ,n II /3, 且a II /3,则m II n (B)若m II a ,n II /3, 且a_l/3,则m II n (C)若m_la ,n II /3, 且a II /3, 则m _l n (D)若m _la,n ll /3,且a_l/3,则m _l n7.(x 2+2)(x ——)6的展开式的常数项为(A)25(B)-25 (C)5(D )—5 8.将函数y =si n (4x -王）图象上所有点的横坐标伸长到原来的2倍（纵坐标不变），再把所6 得图象向左平移王个单位长度，得到函数f(x)的图象，则函数f(x)的解析式为6 (A) f(x) =si n (2x +互）6 CA) C —2,0) LJ (2, 十=)穴CB) f(x) =si n (2x —一）亢(C) f(x) =si n (8x +岊)(D) f(x) =si n (8x —一）9已知抛物线沪=4x 的焦点为F,M,N是抛物线上两个不同的点．若I M Fl+INFl =5,则线段MN的中点到y轴的距离为CA)3 3_2） B （ CC)5 10.巳知a =沪，b=3了，c =l n -2 ，则(A) a> b > c (B) a> c > b (C) b >a> c (D) b > c > a 11已知定义在R上的函数f(x)满足f(2-x)= f(Z +x), 当x冬2时，f(x)= (x —l)e< :--1 若关于x的方程f(x)-kx +zk —e +l=O 有三个不相等的实数根，则实数K的取值范围是(B)(—2,0) LJ (0,2)CC)C —e,O) U (e, 十oo)CD)C —e ,O) U (0, e ) 12.如图，在边长为2的正方形AP 1贮凡中，线段BC的端点B,C分别在边P1P 2,P 2P 3 _t 滑动，且P 2B =P心=x.现将丛AP 1B ,6AP 3C分别沿AB,A C折起使点P1,凡重合，重合后记为点P ,得到三棱锥P-ABC 现有以下结论：(DAP上平面PBC;＠当B,C分别为P1P2,P 2凡的中点时，三棱锥P —ABC的外接球的表面积为67(;®x 的取值范圉为(0,4—2迈）； 1 ＠三棱锥P —ABC体积的最大值为—.则正确的结论的个数为P 1 5_2、丿D （ A 27CD)一5 (A)l (B)2CC )3(D )4数学（理科）”一诊“考试题第2页（共4页）。

四川省成都市2017届高三一诊文综试题

四川省成都市2017届高三一诊文综试题高中2017届毕业班第一次诊断性考试文科综合能力测试第I卷本卷共35个小题，每小题4分，共140分。

在每小题给出的四个选项中，只有一项符合题目要求。

多肉植物叶小、肉厚，非洲西南部的纳马夸兰地区夏季多雾和冬雨使多肉植物疯狂繁殖，其多肉植物出口量已位居世界前列。

图1是纳马夸兰位置示意图，读图完成1～3题。

1．纳马夸兰夏季多雾的原因是A．沿岸寒流的降温作用明显B．沿海海水温度较高C．沿岸暖流提供充足暖湿空气D．海陆间气温差异大2．多肉植物叶小、肉厚的原因是A．昼夜温差大，富含营养物 B．降水较多，汁液饱满C．气候炎热干燥，储存水分 D．地下水丰富，生长旺盛3．非洲纳马夸兰多肉植物出口到世界各地，主要得益于A．互联网进步 B．劳动力廉价C．交通进步 D．政策支持海冰含盐量接近淡水，适当处理后可作为淡水资源。

辽东湾（图2）是我国水温最低、冰情最重、海冰资源分布最多的海区，但目前仍未大规模开发。

据此完成4～6题。

4．辽东湾海面冬季易结冰的主要原因有①纬度较高，获得光热少②多河流注入，海水盐度低③海湾较封闭，水体流动性差④受寒流影响，降温明显A．①②③ B．①②④C．①③④ D．②③④5．海湾封冻会导致A．上空空气湿度增加 B．区域内降雪量增加C．冰面风力显著减弱 D．冰下海水盐度升高6．目前，世界范围内通过海冰大规模制取淡水成本较高的原因可能是A．海水结冰时间短 B．海冰资源较少 C．开采海冰难度大 D．海水污染严重这是一个神奇的岛屿，岛上70%的动物是世界上独有的，80%的树木和植物在世界上也是独一无二的。

岛上的狐猴已经完成了长达5500万年的进化历程。

图3示意该岛屿等高线地形，读图回答7～9题。

7．影响该岛屿R城市分布的主导因素是A．大气环流 B．纬度位置C．海拔高度 D．洋流性质8．该岛屿物种独一无二，其根本原因是A．脱离大陆较早 B．开发历史较短C．环境比较单一 D．缺少大型天敌9．该岛屿狐猴集中分布区的自然景观是A．荒漠 B．草原C．绿洲 D．森林森林火灾与气象条件密切相关。

精品解析：四川省成都市2020届高中毕业班第二次诊断性检测理综化学试题(解析版)

成都市2017级高中毕业班第二次诊断性检测理科综合第I卷(选择题)一、选择题：本题共7个小题，每小题6分。

在每小题给出的四个选项中，只有一项是符合题目要求的。

1.2019年12月17日，我国国产航母——山东舰正式列装服役。

下列用于制造该舰的材料属于无机非金属材料的是A. 舰身无磁镍铬钛合金钢B. 甲板耐磨SiC涂层C. 舰载机起飞挡焰板铝合金D. 舰底含硅有机涂层【答案】B【解析】【分析】无机非金属材料，是除金属材料、高分子材料以外的所有材料的总称。

它是由硅酸盐、铝酸盐、硼酸盐、磷酸盐、锗酸盐等原料和(或)氧化物、氮化物、碳化物、硼化物、硫化物、硅化物、卤化物等原料经一定的工艺制备而成的材料，由此判断。

【详解】A．舰身无磁镍铬钛合金钢属于金属材料中的合金，故A错误；B．甲板耐磨SiC涂层属于无机非金属材料，故B正确；C．舰载机起飞挡焰板铝合金属于金属材料中的合金，故C错误；D．有机硅，即有机硅化合物，是指含有Si-C键、且至少有一个有机基是直接与硅原子相连的化合物，习惯上也常把那些通过氧、硫、氮等使有机基与硅原子相连接的化合物也当作有机硅化合物，不属于无机非金属材料，属于有机材料，故D错误；答案选B。

【点睛】解本题的关键是知道什么是无机非金属材料，无机非金属材料，是除金属材料、高分子材料以外的所有材料的总称。

2.有机物M、N分子的模型如图所示，其中不同颜色的球表示不同的原子，原子之间的化学键可以是单键、双键。

下列说法错误的是M NA. M与HCOOCH3互为同分异构体B. N的官能团为羟基C. 在与钠的反应中N放出气泡比M快D. N能使酸性高锰酸钾溶液褪色【答案】C【解析】【分析】根据分子模型可知，白球代表氢原子，绿球代表碳原子，红球代表氧原子，则M、N的结构简式为CH3COOH 和CH3CH2OH。

【详解】A．M的结构简式为CH3COOH，与HCOOCH3的分子式相同，结构不同，互为同分异构体，故A 正确；B．N的结构简式为CH3CH2OH，官能团为羟基，故B正确；C．CH3COOH和CH3CH2OH分别与钠反应时，CH3COOH中羧基中的氢比CH3CH2OH中羟基中的氢更活泼，故放出氢气速率快，故C错误；D．Ｎ为CH3CH2OH，可以被酸性高锰酸钾溶液氧化为乙酸，高锰酸钾被还原成锰离子，故会褪色，故D 正确；答案选C。

专题06 切比雪夫函数(解析版)

专题06 切比雪夫函数一．考情分析纵观近几年的高考真题，出现了一类题目。

看似是一道有关二次函数的题目；二次函数的定义域和值域相同。

大多数学生或老师，第一眼看过去，以为是定轴动区间或定区间动轴的问题，然后就进入讨论的误区。

深入讨论，就会发现，计算复杂，讨论纷扰。

最后就是不了了之。

然后，再次审视题目，就会发现我们陷入误区。

切比雪夫函数或切比雪夫不等式，在此时的应用，就可以让我们秒解这类题目。

数学的学习，就是要学习数学，领悟数学，秒杀数学。

二．经验分享1.切比雪夫不等式①马尔科夫不等式：()(),(X 0)E X P X αα≥≤≥；②切比雪夫不等式是马尔科夫不等式的特殊情况：()21|X |k P k μσ-≥≤()0,k μσ>其中是期望，是标准差. 2. 切比雪夫函数与切比雪夫不等式的意义马尔科夫不等式和切比雪夫不等式，是高等数学中学习的内容，是概率与统计学中的一个定理。

主要意思：事情的大多会集中在平均值附近或者事情的发生大多在平均值上的概率最大。

也就说，马尔科夫不等式或者切比雪夫不等式只是对概率的一个估计，既然是估计，就有可能正确，也有可能不正确。

但是按照这两个不等式来看，在概率学的角度上。

发生的概率是最大。

但在高中数学学习初等函数，用这个两个不等式解题，就会有出奇制胜，秒杀的快感。

三、题型分析（一）切比雪夫函数的巧解例 1.已知函数()()R b a b a x x x f ∈++=,|-|212，若[]1,1x ∈-时，()1f x ≤，则12a b +的最大值是．【传统解法】【切比雪夫不等式解法】【解析】根据切比雪夫不等式：()()R b a b a x x x f ∈++=,|-|212，若[]1,1x ∈-时，()1f x ≤ 对称轴为压轴，所以[]1,1a x =∈-，()()R b a b x x f ∈,2+=，当1x =±，|(1)|=|1+b|1f ±≤,故此次1,b =-12a b +的最大值()111+122⨯-=- 【变式训练】已知函数)0()-2()(2>++=m n x m mx x f ，若[]1,1x ∈-时，()1f x ≤恒成立，则)32(f =【切比雪夫不等式解法】【解析】根据切比雪夫不等式：若[]1,1x ∈-时，()1f x ≤恒成立，也就是对称轴应该是0x =；2=02mx m-=-，解之得：m 2=，2(x)2x f n =+,故此|(1)||2n |1f =+≤恒成立；故此1n =-,所以2(x)2x 1f =-.91-)32(=∴f .（二）其他类型函数的例2．【2019年高考浙江】已知a ∈R ，函数3()f x ax x =-，若存在t ∈R ，使得2|(2)()|3f t f t +-≤，则实数a 的最大值是___________. 【答案】43【解析】存在t ∈R ，使得2|(2)()|3f t f t +-≤，即有332|(2)(2)|3a t t at t +-+-+≤，化为()22|23642|3a t t ++-≤，可得()2222364233a t t -≤++-≤，即()22436433a t t ≤++≤，由223643(1)11t t t ++=++≥，可得403a <≤. 则实数a 的最大值是43.【名师点睛】本题考查函数的解析式及二次函数，结合函数的解析式可得33|(2)(2)|a t t at t +-+-+23≤，去绝对值化简，结合二次函数的最值及不等式的性质可求解.【变式训练1】【广东省汕头市2019届高三第二次模拟考试（B 卷)数学】已知函数()211,02,0x x x f x xx +⎧+-<⎪=⎨⎪≥⎩， ()22g x x x =--，设b 为实数，若存在实数a ，使得()()2g b f a +=成立，则b 的取值范围为A ．[]1,2-B ．37,22⎡⎫-⎪⎢⎣⎭ C ．37,22⎡⎤-⎢⎥⎣⎦D ．3,42⎛⎤-⎥⎝⎦【答案】A【解析】因为()211,02,0x x x f x xx +⎧+-<⎪=⎨⎪≥⎩，所以当0x ≥时，()12x f x +=单调递增，故()122x f x +=≥；当0x <时，()()21112x f x x x x x x ⎡⎤+⎛⎫⎛⎫=-=-+=-+-≥ ⎪ ⎪⎢⎥⎝⎭⎝⎭⎣⎦，当且仅当1x x-=-，即1x =-时，取等号，【变式训2】【高2017级资阳市高三第二次诊断性考试理科数学，12题】已知直线2y x =与曲线(x)ln(ax b)f =+相切，则ab 的最大值为（）A.4e B.2eC.eD.2e【答案】C【解析】由题意得：设切点为00(x ,y )A ，因为切点既在直线2y x =上，也在曲线(x)ln(ax b)f =+上，所以得到：002x ln(ax b)=+①；同时求导：'2y =和'ay ax b=+，切点在00(x ,y )A ，故此02a ax b =+②；联立①②得：01ln 22a x ⎛⎫=⎪⎝⎭再带入②整理得：1ln 222a aa b ⎛⎫⎛⎫+= ⎪ ⎪⎝⎭⎝⎭，化简：22ln ln 222222a a a a a a b ab ⎛⎫⎛⎫=-⇒=- ⎪ ⎪⎝⎭⎝⎭，其中0a >；构造函数22(x)ln(),(x 0)222x x x H =->，'1(x)ln ,(x 0)22x H x ⎛⎫=-> ⎪⎝⎭ 故当(0,2x e ∈，'1(x)ln 022x H x ⎛⎫=-> ⎪⎝⎭，22(x)ln()222x x x H =-是单调递增；当()2,x e ∈+∞，'1(x)ln 022x H x ⎛⎫=-< ⎪⎝⎭，22(x)ln()222x x x H =-是单调递减。

四川省成都市2013届高三第二次诊断性检测化学试题 2

成都市2013届高中毕业班第二次诊断性检测理科综合化学部分第I卷1. 下列说法不正确的是A. 天然油脂含酯基属于酯类物质B. 麦芽糖和蔗糖的水解产物相同C. 酚醛树脂是酚与醛的缩聚产物D. 石油裂化和裂解都可制得烯烃2. 若N A为阿伏加德罗常数的值，下列叙述正确的是A. 1 mol-OH中含有的质子数为9N AB. lmol2，3—丁二醇分子中含C一C数目为4N AC. 1 L 1 mol.L-1 FeCl3溶液中含有 Fe3 +数为 N AD. 71 g氯气参与反应，电子转移数目一定为2N A3. 已知A、B、C、D为短周期主族元素，其相对位置关系如图。

C与B可形成离子化合物C3B2。

下列分析正确的是A. 电负性:C>AB. 离子氧化性:C>DC. 氢化物稳定性:A> BD. 原子半径:r(C)> r(B)4. 已知HF酸性强于CH3COOH，常温下有下列三种溶液。

有关叙述不正确的是A. ②、③混合后:C(H+）=C(F-)+C(CH3COCT)+ c(0H-)B. ①、②等体积混合后：c(CH3COO-)>c(Na+)>C(H+)>c(OH-)C. 中和相同体积的②、③，需消耗相同体积的①D. 向②加入NaF固体，CH3C00H电离平衡正向移动5. 下列实验、现象及相关结论均正确的是6. 已知250C时某溶液中含有大量Na+、H+、Fe3+、HC03－、OH-、I-中的几种,并且水电离出的c(H+) = 1XlO-13mol/L。

当向该溶液中缓慢通入一定量的Cl2后,溶液由无色变为黄色。

下列有关分析正确的是A. 溶液的PH=1或13B. 溶液中一定没有Fe3+,Na+c.溶液中阴离子有I-，不能确定HCO3-D.当Cl2过量，所得溶液只含有两种盐7. 将1 mol CO和2 mol H2充入一容积为1L的密闭容器中，分别在250°C、T°C下发生反应:CO(g)+2H2(g)＝＝CH3OH(g)，ΔH=akJ/mol,如图。

2015成都二诊四川省成都市2015届高三第二次诊断性检测英语试题 Word版含答案

成都市2015届高中毕业班第二次诊断性检测英语本试卷分选择题和非选择题两部分。

第I卷（选择题）1至8页，第II卷（非选择题）第9至10页，共10页；满分150分，考试时间120分钟。

注意事项：1.答题前，务必将自己的姓名、考籍号填写在答题卡规定的位置上。

2.答选择题时，务必使用2B铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦干净后，再选涂其他答案标号。

3.答非选择题时，务必使用0.5毫米黑色签字笔，将答案书写在答题卡规定位置上。

4.所有题目必须在答题卡上作答，在试卷上答题无效。

5.考试结束后，只将答题卡交回。

第I卷（选择题，共90分）第一部分英语知识运用（共两节，满分40分）第一节：语法和词汇知识（共10小题；每小题1分，满分10分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该选项涂黑。

1. ----Congratulations on your 18th birthday, Mark! Many happy returns!----__________.A.My pleasure.B. Good heavens!C. Thanks a lot.D. The same to you.2. There are times ____ you have to act from the heart.A. whenB. thatC. whereD. which3. ---It‟s a pity that I can speak neither German nor French.---I can‟t, ____.A. tooB. eitherC. also as well4. _____ to make his fortune in South America, Mark Twain set off from his home for New Orleans in his teens.A. Being determinedB. To determineC. DeterminedD. Determine5. ____ working hard does not necessarily guarantee one‟s success, it is almost impossible to succeed without it.A. IfB. WhenC. AsD. While6. ---Have you worked out the schedule for our graduation trip?---Yes. I ___ on it for 3 hours.A. have been workingB. was workingC. workedD. had worked7. With so many plans ____, I‟m sure to have a tight but rewarding summer holiday.A. carryingB. to carry outC. carriedD. to be carried8. Film reviewers are surprised to find that Han Han‟s first film, The Continent, ____ be such a huge success.A. canB. mustC. mayD. should9. You can tell about a person by ____ he says about others in their absence.A. whatB. whichC. thatD. whether10. One Hundred Years of Solitude, a world-famous novel about a seven-generation Colombian family, ___ into 27 languages since 1967.A. translatedB. was translatedC. has translatedD. has been translated第二节完形填空（共20个小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

四川省成都市2020届高三第二次诊断性检测文综政治试题(解析版)

成都市2017级高中毕业班第二次诊断性检测文科综合本试卷分选择题和非选择题两部分。

第I卷(选择题)1至8页，第II卷(非选择题)9至14页，共14页；满分300分，考试时间150分钟。

注意事项：1.答题前，务必将自己的姓名、考籍号填写在答题卡规定的位置上。

2.答选择题时，必须使用2B铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦干净后，再选涂其它答案标号。

3.答非选择题时，必须使用0.5毫米黑色签字笔，将答案书写在答题卡规定的位置上。

4.所有题目必须在答题卡上作答，在试题卷上答题无效。

5.考试结束后，只将答题卡交回。

第I卷(选择题，共140分)一、选择题：本大题共35小题，每小题4分，共140分。

在每小题给出的四个选项中，只有一项是符合题目要求的。

12.2020年1月20日，财政部等三部委联合发布《关于促进非水可再生能源发电健康发展的若干意见)提出，新增海上风电和光热项目不再纳入中央财政补贴范围，到2021年，陆上风电、光伏电站将全面取消国家补贴。

若其它条件不变，这一举措对非水可再生能源发电市场产生的影响可以图示为13.国务院常务会议决定，2020年3月1日至5月底，免征湖北境内小规模纳税人增值税，其他地区征收率由3%降至1%；个体工商户按单位参保养老、失业、工伤保险，参照中小微企业享受减免；落实除高耗能行业外工商业电价阶段性降低5%政策。

上述举措对当前经济社会发展的影响路径是①缓解企业经营压力②完善社会保障制度③增加市场消费需求④助力企业复工复产⑤促进经济平稳运行⑥降低制度性交易成本A.⑥→①→④→⑤B.⑥→②→③→⑤C.②→⑥→④→③D.①→④→⑤→②14.十八大以来，党和国家把脱贫攻坚作为全面建成小康社会的底线任务和标志性指标，全力打赢打好精准脱贫攻坚战。

2016 年至2019年，中央财政累计安排专项扶贫资金3843. 8亿元，年均增长28.6%。

图3是2015～2019年全国农村贫困人口和贫困发生率。

2018届四川省成都市高三第二次诊断性考试生物试题及答案

四川省成都市2018届高三第二次诊断性检测
生物试题
第Ⅰ卷
1．下列有关生物膜结构与功能的叙述，不正确的是
A．细胞内ATP的合成过程只能在生物膜上完成
B．膜的选择透过性与磷脂分子和蛋白质分子都有关
C．细胞膜上蛋白质种类的多少决定其功能的复杂程度
D．构成生物膜的磷脂分子和大多数蛋白质分子可以运动
2．黄曲霉素是毒性极强的致癌物质，在细胞中还能干扰mRNA与DNA的合成、干扰某些tRNA与氨基酸的结合。

据此推测，幼鼠长期摄入较多黄曲霉素后，机体不．可能出现
A．遗传信息的转录和翻译异常 B．血浆蛋白减少影响内环境稳态
C．抑癌基因突变成为原癌基因 D．生长缓慢且免疫系统功能紊乱
3．AUG、GUG是起始密码子，在mRNA翻译成肽链时分别编码甲硫氨酸和缬氨酸，但人体血清白蛋白的第一个氨基酸既不是甲硫氨酸，也不是缬氨
酸，这是因为
A．组成人体血清白蛋白的单体中没有甲硫氨酸和缬氨酸
B．mRNA与核糖体结合前去除了最前端的部分碱基序列
C．mRNA起始密码所在位置的碱基在翻译前发生了替换。

2020年成都市高中二诊语文试卷及答案

成都市2017级高中毕业班第二次诊断性检测语文一、现代文阅读（36分）（一）论述类文本阅读（本题共3小题,9分）阅读下面的文字，完成1〜3题。

宋以前的中国和宋以后的中国有一个不同，那就是从“贵族一士族”社会，变成了平民社会。

在宋代以前，虽然中国人经常抱怨“王侯将相，宁有种乎",但事实是确实贵族有种。

高门大户往往能传递几百年，底层百姓也永远安于被剥削的命运。

除了起兵造反，或者疆场立功，一个人很难突破玻璃天花板，从底层社会爬到上层社会。

直至唐代，门阀观念的影响仍然十分严重。

而到了宋代,这一切变了。

“贫富无定势"“富儿更替做"（宋代谚语）。

下层社会的人也可以通过个人奋斗，在短时期内改变自己的命运，即所谓“朝为田舍郎，暮登天子堂"，火箭式升入最高层，“骤得富贵"。

富家大族的传递因此变得极为困难，更为常见的情况是“富不过三代"“朝廷无世臣无百年之家”。

阶层之间不再有明显界限。

郑樵说:“自五季以来，取士不问家世,婚姻不问阀阅，故其书散佚而其学不传。

"（《通志-氏族略》）下层文化和上层文化开始融合,开创了中国文化的新境界。

这一切发生的第一个原因，是从中唐到五代一百多年的战乱，使得整个社会天翻地覆，那些从汉代传到唐代的相沿几百年的世家大族在这个空前的乱世中，终于被毁灭了。

特别是五代的极度混乱，如同一个炒锅一样，将社会各个阶层颠簸出原来的轨道，上下颠倒，贫富易位。

无数个积累了几百年建起的藏书楼被一把火烧掉，相守了无数世代的大家族分崩离析,原来养尊处优的士族们或死或逃或成为乞丐奴仆，士族阶层连同他们创造的士族文化在整体上被毁灭了，社会成了一锅原子粥。

第二个更主要的原因，就是科举制的成熟。

虽然科举发明于隋，实行于唐,但科举在隋唐两代都没能成为入仕的最主要途径。

况且隋唐两代教育并不普及，只有上层社会才能获得较好的教育环境，因此中举者也都是士族，因此，唐代基本还是一个半世袭的士族社会。