甘肃省兰炼一中(兰州58中)2021届高三上学期建标考试理科综合试题及答案
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甘肃省兰州第一中学【最新】高三冲刺模拟考试理科综合化学试题学校:___________姓名:___________班级:___________考号:___________一、单选题1.化学与工农业生产、生活密切相关,下列说法中正确的是A.合成纤维和光导纤维都是新型有机非金属材料B.淀粉、纤维素和油脂都属于天然高分子化合物C.“玉不琢不成器”、“百炼方能成钢”发生的均为化学变化D.造纸工艺中使用明矾,会导致纸张发生酸性腐蚀,使纸张变脆,易破损。
2.下列叙述中正确的是A.由乙酸和乙醇生成乙酸乙酯的反应类型和由乙醇生成乙烯的反应类型相同B.丙烯在一定条件下可与氯气发生取代反应生成3-氯丙烯C.硫酸铵和硝酸铅均能使蛋白质变性D.甲苯与氯气在光照下发生取代反应主要生成2,4-二氯甲苯3.下列操作或装置正确并能达到实验目的的是A.A B.B C.C D.D4.由2个一CH3,3个—CH2—、1个、1个—OH构成的有机物的数目为A.4 B.5 C.6 D.75.下列有关说法中正确的是A.某温度时的混合溶液中c(H+)=√K W mol·L-1,说明该溶液呈中性(K w为该温度时水的离子积常数)B.由水电离出的c(H+)=10-12mol·L-1的溶液中:Na+、Ba2+、HCO3-、Cl-可以大量共存C.已知K sp(AgCl)=1.56×10-10,K sp(Ag2CrO4)=9.0×10-12。
向含有Cl-、CrO42-且浓度均为0.010 mol·L-1溶液中逐滴加入0.010 mol·L-1的AgNO3溶液时,CrO42-先产生沉淀D.常温下pH=7的CH3COOH和NaOH混合溶液中,c(Na+)>c(CH3COO-)6.短周期原子序数依次增大的主族元素R,T,Q,W,Y,Z具有如下信息:,R,Y原子的最外层电子数与电子层数相同;,Q是地壳中含量最高的元素,R与T的核电荷数之和等于Q的核电荷数;,W与R同主族,Z与Q同主族。
兰炼一中(58中)教育集团2021届高三建标考试英语试题第Ⅰ卷(共70分)第一部分:阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分)阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项,并把答案填写在答题卡上相应的位置。
AAs the leaves start to change color and the autumn air turns fresh,sometimes nothing is more appealing than the attractions of a good book.Here are four top picks for the best books.The Most Fun We Ever HadBy Claire LombardoDoubledayDavid and Marilyn have been married forever.Four kids and decades later,they are still as in love as the day they met.Lombardo Paints an extraordinary picture of a family in what could well be one of the best novels published this year.The Shadow KingBy Maaza MengisteW.W.Norton&CompanyA historical novel that takes place in the1930s Ethiopia,the Shadow king focuses on the female soldiers who take up arms in World War II.In beautiful prose(叙述),Mengiste shines a light on those whose lives are not often noticed.Someone We KnowBy Shari LapenaPamela Dorman BooksA quiet suburban town is shaken by a series of break-ins and a body that turns up in the trunk of a car in this latest psychological thriller by the author of The Couple Next Door.Here are the crimes related? And what does the invader know?The Only Plane in the SkyBy Garrett M.GraffAvid Reader PressJournalist Graff put together an oral history of9/11from the perspective of nearly everyone involved. Every single line is breathtaking and heartbreaking,weaving together the history of previously-unimaginable and tragic events that changed history.1.Which of the following published the book about family life?A.DoubledayB.W.W.Norton&CompanyC.Pamela Dorman BooksD.Avid Reader Press2.Who is the author of Thriller?A.Claire LombardoB.Maaza MengisteC.Shari LapenaD.Garrett M.Graff3.What is the book The Only Plane in the Sky about?A.An imaginary tragic Story.B.A historical novel about soldiers.C.A journalist involved in9/11event.D.A collection of true stories in9/11.BAirports will soon add a new layer to their security procedures.Several airports in Europe willstart giving lie detector tests to passengers.Special lie detector machines will use artificial intelligenceto test travellers.The lie detector machines are backed by a European Union project called iBorderCtrl.The first machines will be at border checkpoints in Hungary,Greece and Latvia.Airports in these countrieswill carry out tests on the lie detector machines this month.Travelers from outside the EU countries will have to take the test.They will look into awebcam and answer questions from a computer-animated(电脑动画的)immigration official.The computer-produced animation will change to match the race and language of the traveler.A European Union spokesperson said the virtual border guard will scan passengers'faces and analyze their micro expressions.They will use these expressions to find out if the passenger mightbe lying.A human security guard will take over if the lie-detecting software detects a security risk.The procedure will firstly divide passengers into two types.Low-risk travelers will be asked basic infor-高三英语第2页(共4页)mation in the lie-detection process while high-risk passengers will get more detailed questions.A psy-chology expert doubted if the system would work.He said,“If you ask people to lie,they will doit differently and show very different behavioral cues(暗示)than if they truly lie...This is a known problem in psychology.”4.Where will you see this special lie detector machine?A.At a border checkpoint in ItalyB.At Greece airportsC.In iBorderCtrl offices.D.In Hungary security department5.What does the underlined word“backed”mean in Paragraph2.A.supportedB.producedC.TestedD.sold6.How does the lie detector machine work?A.By scanning passengers’brain.B.By looking into a webcamC.By analyzing facial expressions.D.By distinguishing abnormal mood.7.Which word below can best describe the psychology expert’s attitude towards the lie detecting?.A.indifferentB.supportiveC.opposedD.skepticalCThere is a lot of losing in sports.Only one team can win at a time,and only one champion escapes the season without tears.But that doesn’t stop Americans from spending nearly$56billion a year on sporting events.Is fandom(运动迷)worth it?At first glance,the evidence isn’t encouraging.Following a loss,fans are more likely than usual to eat unhealthy food,be unproductive at work,and–in the case of the Super Bowl-die from heart disease.What about fans of the winning team?Well,they are more likely than other fans to suffer a postgame traffic fatality(死亡)if the score is close.Rival(竞争的)fans’treatment of one another is hardly more encouraging.A recent study found that fans experienced greater pleasure when watching a rival team fail.Fans in another study reported schadenfreude,a feeling of satisfaction,when reading about the injury of a rival team’s player,and gluckschmerz or unhappiness when later reading about the player’s unexpectedly speedy recovery.Yet a great deal of research shows that being a fan can also have positive effects.It can preventdepression and build a sense of belonging and self-worth---in case that the object of one’s devotion is a local team.Much of this is due to social bonds among fans,but not all---sports worship also provides fans with a number of skills at dealing with life’s emotional challenges.A landmark1976study found that after a win,fans were more likely than usual to wear clothes connected with the winning teams,and to claim credit for the team’s success by describing the team as“we”instead of“they”in conversation.Along with schadenfreude and gluckschmerz,being a fan seems more than anything else to be a matter of managing responses to things that cannot control.Sports fans tend to respond to reminders of death with optimism,and to remember victories much more clearly than defeats.8.Which of the following statement is especially true as for the winning side’s fans?A.They might die from heart disease.B.They tend to live an unhealthy life.C.They can have good work efficiency.D.They might have a traffic accident.9.What does the underlined sentence mean in paragraph3?A.Rival fans usually hold bad or even extreme attitude to each other.B.Rival fans often fight with each other.C.Fans can face their rival team bravely.D.Fans never lose heart when facing their rival team.10.What did the1976study show?A.Being a fan could show great devotion to study.B.Being a fan could create a sense of belonging.C.Being a fan could develop a spirit of optimism.D.Being a fan could test social bonds.11.What is the best title for the text?A.How to be a fanB.What it’s like to be fanC.Being a fan can be good for youD.A fan’s emotional challengesDHalf decade ago,at the end of my first semester teaching at Wharton,my student Kevin stopped by for office hours.He sat down and burst into tears.My mind started cycling through a list of events that could make a college junior cry:His girlfriend had broken up with him;he had been accused of cheating in exams;he forgot to turn in papers before the deadline."I just got my first A-minus(减),"he said with his voice shaking.Year after year,I watch in depression as students are crazy about getting straight A's.Some sacrifice their health;a few have even tried to charge their school after falling short(倒挂).All hold the belief that top marks are a ticket to best graduate schools and rewarding job offers.I was one of them.I started college with the goal of graduating with a4.0.It would be a reflection of my brainpower and willpower, showing that I had the right stuff to succeed.But I was wrong.The evidence is clear:Academic excellence is not a strong predictor of career excellence.Across industries,research shows that the connection between grades and job performance is modest in the first year after college and unimportant within a handful of years.Take Microsoft for example,once employees are two or three years out of college,their grades have no bearing on their performance.(Of course,it must be said that if you got D's,you probably didn't end up at Microsoft.)Academic grades rarely assess qualities like creativity,leadership and teamwork skills,or social,emotional and political intelligence.Yes,straight A students master large amounts of information and reproduce it in exams.but career success is rarely about finding the right solution to a problem-it’s more about finding the right problem to solve.This might explain why Steve Jobs finished high school with a 2.65GPA,and Martin Luther King Jr.got only one A in his four years at Morehouse.12.Why did the student Kevin feel sad?A.He was caught cheating in exams.B.His girlfriend abandoned him.C.He didn’t hand in his papers before headline..D.He failed to get straight A's.13.What did the author once believe?A.Marks didn’t reflect willpower and brainpower.B.Top marks meant well-paid job offers.C.It was wrong to care too much about marks.D.Straight A's don't bring creative performances.14.Why are the employees at Microsoft mentioned?A.To stress the company values employees with top marks.B.To indicate academic performance is important.C.To show academic excellence isn’t a strong predictor of career performance.D.To introduce successful example in the technology industry.15.What should people focus more on to succeed according to the passage?A.How to be a creative leader.B.What to do with detailed information.C.How to solve a problem.D.What problems to be solved.第二节(共5小题;每小题2分,满分10分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
A .假设波沿B.假设波沿C.假设波沿D.假设波沿x轴正方向传播,图x轴正方向传播,图x轴负方向传播,图x轴负方向传播,图〔乙〕〔乙〕〔乙〕可能为可能为可能为a点的振动图像b点的振动图像C点的振动图像d点的振动图像2021年甘肃省高三第一次高考诊断理综物理局部高中物理理科综合试卷物理局部考生注意:本试卷分第一卷〔选择题〕和第二卷〔非选择题〕两局部,总分值300分,考试时刻150分钟,请将第一卷符合题目要求的选项写在第二卷前面的表格里。
第一卷〔选择题共21题,每题6分,共126分〕二、选择题〔本体包括8小题,每题给出的四个选项中,有的只有一个选项正确,有的有多个选项正确,全部选对的得6分,选对但不全对的得3分,有选错或不答的得0分〕14.如以下图,气缸内盛有一定质量的理想气体,气缸壁导热良好,活塞与气缸壁接触处光滑且不漏气。
在气缸外部气体压强保持不变的前提下,缓慢地升高气缸外部气体的温度。
理想气体的内能只与温度有关,那么以下讲法中正确的选项是〔〕A •缸内气体从单一热源吸热,全部用来对外做功B.缸内气体从单一热源吸热,但并未全部用来对外做功C.缸内气体分子无规那么运动加剧D.缸内气体内能不变15.一列简谐横波的波形图如图甲所示,图乙表示该波传播介质的中的某点在这一时刻之后段时刻内的振动图像,那么可能为〔乙16 .某原子核A放出,,粒子各一个变成C核,A核与C核相比A.A核比C核多2个中子 B . A核比C核多2个质子C. A核比C核多1个质子 D . A核比C核多3个中子17.如以下图,三角架质量为M,静止在水平面上,中间用两轻质弹簧拴一质量为m小球,小球上下振动过程中,三角架对地的最小压力恰为零。
那么三角架对地面的最大压力为A.2(M+m )gB. (M+m )gC. (M+m)g+mg D . (M+m)g-mg18 .在研究平行板电容器的电容与哪些因素有关的实验中,如以下图实验装置,平行板电容器充电后A板带正电,B板带负电,以下对试验过程中,带电量不变,猎取信息的描述符合实际的是〔〕A.在AB间插入电介质,看到静电计的指针偏角增大,电容器电场能减少B.使AB间的距离减小,看到静电计的指针偏角增大,电容器电场能增大C .把B板上移一些使AB正对面积减小,看到静电计指针偏角增大,电容器电场能增大D.假设没有静电器,能够用内阻专门大的伏特表测AB间电势差19 .如以下图,设地球的质量为M嫦娥一号的质量为m,G是引力常量,嫦娥一号在椭圆轨道上运行,A是椭圆轨道近地点,距地心的距离为r a。
2021届甘肃省兰炼一中(兰州58中)高三上学期建标考试英语试卷★祝考试顺利★(含答案)第Ⅰ卷(共70分)第一部分:阅读理解(共两节,满分40分)第一节 (共15小题;每小题2分,满分 30分)阅读下列短文,从每题所给的 A、B、C 和 D 四个选项中, 选出最佳选项,并把答案填写在答题卡上相应的位置。
AAs the leaves start to change color and the autumn air turns fresh, sometimes nothing is more appealing than the attractions of a good book. Here are four top picks for the best books.The Most Fun We Ever HadBy Claire LombardoDoubledayDavid and Marilyn have been married forever. Four kids and decades later, they are still as in love as the day they met. Lombardo Paints an extraordinary picture of a family in what could well be one of the best novels published this year.The Shadow KingBy Maaza MengisteW.W .Norton & CompanyA historical novel that takes place in the 1930s Ethiopia, the Shadow king focuses on the female soldiers who take up arms in World War II . In beautiful prose(叙述), Mengiste shines a light on those whose lives are not often noticed.Someone We KnowBy Shari LapenaPamela Dorman BooksA quiet suburban town is shaken by a series of break-ins and a body that turns up in the trunk of a car in this latest psychological thriller by the author of The Couple Next Door. Here are the crimes related ? And what does the invader know? The Only Plane in the SkyBy Garrett M. GraffAvid Reader PressJournalist Graff put together an oral history of 9/11 from the perspective of nearly everyone involved.Every single line is breathtaking and heartbreaking, weaving together the history of previously- unimaginable and tragic events that changed history.1. Which of the following published the book about family life?A. DoubledayB. W.W .Norton & CompanyC. Pamela Dorman BooksD. Avid Reader Press2. Who is the author of Thriller?A. Claire LombardoB. Maaza MengisteC. Shari LapenaD. Garrett M. Graff3. What is the book The Only Plane in the Sky about?A. An imaginary tragic Story.B.A historical novel about soldiers.C.A journalist involved in 9/11 event.D. A collection of true stories in 9/11.BAirports will soon add a new layer to their security procedures. Several airports in Europe willstart giving lie detector tests to passengers.Special lie detector machines will use artificial intelligenceto test travellers.The lie detector machines are backed by a European Union project called iBorderCtrl. The firstmachines will be at border checkpoints in Hungary, Greece and Latvia. Airports in these。
兰州一中高三年级期中考试试题理科综合注意事项:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
答卷前,考生务必将自己的姓名、班级、座位号填写在三张答题卡上。
2.试卷满分300分,考试时间150分钟。
可能用到的相对原子质量:H—1 C—12 O—16 Mg—24 Cu—64第Ⅰ卷一、选择题:本题共13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.用蛋白酶去除大肠杆菌核糖体的蛋白质,处理后的核糖体仍可催化氨基酸的脱水缩合反应。
由此可推测核糖体中能催化该反应的物质是A.蛋白酶B.RNA聚合酶C.逆转录酶 D.RNA2.下列有关ATP的叙述,错误的是A.线粒体合成的ATP可在细胞核中发挥作用B.机体在运动时消耗ATP,睡眠时积累ATPC.在有氧与缺氧的条件下细胞质基质中都能形成ATPD.每个ATP分子中含有两个高能磷酸键3.下列关于物质跨膜运输的叙述,错误的是A.在顺浓度梯度情况下,葡萄糖可以通过协助扩散进入细胞B.低温环境会影响物质的主动运输速率,但不影响被动运输C.水分进出细胞取决于细胞膜两侧液体的浓度差D.土壤板结能影响植物根细胞膜转运K+速率4.下列关于细胞结构和功能的叙述,错误的是A.肺炎双球菌无线粒体,只能进行无氧呼吸B.线粒体、叶绿体中含有少量遗传物质C.分泌蛋白的形成与核糖体、内质网、高尔基体有关D.内质网既参与物质合成,也参与物质运输5.下列有关探究光合作用过程的描述,正确的是A.将充分暗处理后的天竺葵叶片一半遮光,光照一段时间,遮光部分遇碘变蓝B.载有水绵和好氧细菌的临时装片,用透过三棱镜的光照射一段时间,绿光区域聚集细菌最多C.向绿色植物提供H218O和CO2,光照一段时间,释放的气体含有18O2D.向小球藻提供14CO2,光照一段时间,14C5化合物先于14C3化合物出现6.下列有关生物实验选材的叙述,错误的是A.用紫色洋葱鳞片叶内表皮细胞可观察DNA和RNA在细胞中的分布情况B.用哺乳动物成熟红细胞可制备较纯净的细胞膜C.用过氧化氢酶可探究温度对酶活性的影响D .用黑藻叶片可观察植物细胞质壁分离现象7.下列对有关化学反应过程或实验现象的解释中,正确的是A .Cl 2的水溶液可以导电,说明Cl 2是电解质B .在高温条件下,C 能置换出SiO 2中的Si ,说明C 的氧化性强于SiC .向淀粉碘化钾的溶液中加入氯水,溶液变为蓝色,说明Cl 2的氧化性强于I 2D .滴有酚酞的Na 2CO 3溶液中,加入BaCl 2溶液后,溶液褪色,说明BaCl 2溶液有酸性8.据最新报道,科学家发现了如下反应:O 2+PtF 6 = O 2(PtF 6),已知O 2(PtF 6)为离子化合物,其中Pt 为+5确的是A .在此反应中,O 2是氧化剂,PtF 6是还原剂B .反应中每生成1molO 2(PtF 6)转移1mol 电子C .O 2(PtF 6)中氧元素的化合价是+1价D .O 2(PtF 6)中仅存在离子键不存在共价键9.符合右图的化学反应是 最外层电子数是电子层数的3倍,X 、M 同主族,Y 的原子在短周期主族元素中原子半径最大。
兰州一中2020-2021-1学期高三年级期中考试理科综合能力测试化学可能用到的相对原子质量:H-1 B-11 C-12 O-16 Na-23 Mg-24 Al-27 P-31 S-32 Cl-35.5 Ca-40 V-51 Fe-56 Cu-64A 物质性质与用途B安全常识N2性质稳定———填充在食品袋防腐乙醇具有可燃性———用作燃料CO 具有还原性———冶炼金属假酒中毒———由甲醇引起假盐中毒———由黄曲霉毒素引起瓦斯爆炸———由天然气引起C 元素与人体健康D日常生活经验缺铁———易引起贫血缺钙———易得佝偻病或骨质疏松症缺碘———易得甲状腺肿大去除衣服上的油污———用汽油洗涤热水瓶中的水垢———用食醋清除使煤燃烧更旺———把煤做成蜂窝状8.下列说法正确的是A.检验某酸性溶液中Cl-和SO42-,选用试剂及顺序是过量Ba(NO3)2溶液、AgNO3溶液B.将足量CO2和SO2的混合气体分别通入BaCl2溶液、Ba(NO3)2溶液中,最终都无沉淀生成C.将铁粉加入FeCl3、CuCl2混合溶液中,充分反应后剩余的固体中必有铁D.用加热分解的方法可将NH4Cl固体和Ca(OH)2固体的混合物分离9.下列叙述正确的是A.直径介于1 nm~100 nm之间的微粒称为胶体B.电泳现象可以证明胶体粒子带电C.丁达尔效应是溶液与胶体的本质区别D.胶体粒子很小,可以透过滤纸和半透膜10.若N A表示阿伏加德罗常数的值,下列说法正确的是A.标准状况下,22.4 L Cl2通入足量水中转移电子数为N AB.KClO3 + 6HCl = KCl + 3Cl2↑+ 3H2O中,生成13.44 L(标准状况)Cl2转移电子数为1.2 N AC.标准状况下,11.2 L NO和11.2 L O2混合后,原子总数小于2 N AD.14 g N2中含有7 N A个电子11.A~G各物质间的关系如下图所示,其中B、D为气体单质。
甘肃省兰州第一中学2020-2021学年高三上学期期中理综物理试题学校:___________姓名:___________班级:___________考号:___________一、单选题1.下列说法不正确的是A.亚里士多德认为力是维持物体运动的原因B.牛顿三大定律都可以通过实验来验证C.做曲线运动的物体其合力可以是恒力D.卡文迪许利用扭秤实验测出了引力常量G的数值2.中国书法艺术历史悠久,某同学用毛笔练习书法,从基础笔画“横”开始练习。
如图,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,再向左回带。
该同学在水平桌面上平铺一张纸,为防止打滑,他在纸的左侧靠近边缘处用镇纸压住。
则关于向右行笔过程中物体的受力情况,说法正确的是A.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.白纸受到了两个摩擦力的作用D.桌面受到了向左摩擦力作用3.如图所示为一简易起重装置,(不计一切阻力)AC是上端带有滑轮的固定支架,BC 为质量不计的轻杆,杆的一端C用铰链固定在支架上,另一端B悬挂一个质量为m的重物,并用钢丝绳跨过滑轮A连接在卷扬机上.开始时,杆BC与AC的夹角∠BCA>90°,现使∠BCA缓缓变小,直到∠BCA=30°.在此过程中,杆BC所产生的弹力()A.大小不变B.逐渐增大C.先增大后减小D.先减小后增大4.如图甲所示,轻弹簧竖直固定在水平面上,一质量为m=0.2kg的小球,从弹簧上端某高度处自由下落,从它接触弹簧到弹簧压缩至最短的过程中(弹簧在弹性限度内),其速度v和弹簧压缩量△x之间的函数图象如图乙所示,其中A为曲线的最高点,小球和弹簧接触瞬间机械能损失不计,g 取10 m/s2,则下列说法正确的是A.小球刚接触弹簧时加速度最大B.该弹簧的劲度系数为20.0 N/mC.从接触弹簧到压缩至最短的过程中,弹簧的弹性势能先增大后减小D.从接触弹簧到压缩至最短的过程中,小球的机械能守恒二、多选题5.如图所示,倾角θ=30°的斜面AB,在斜面顶端B向左水平抛出小球1、同时在底端A正上方某高度处水平向右拋出小球2,小球1、2同时落在P点,P点为斜边AB的中点,则()A.小球2一定垂直撞在斜面上B.小球1、2的初速度大小一定相等C.小球1落在P点时与斜面的夹角为30°D.改变小球1的初速度,小球1落在斜面上的速度方向都平行6.如图所示,O处为地心,卫星1环绕地球做匀速四周运动,卫星2环绕地球运行的轨道为椭圆,两轨道不在同一平面内.已知圆轨道的直径等于椭圆轨道的长轴,且地球位于椭圆轨道的一个焦点上,引力常量为G,地球的质量为M,卫星1的轨道半径为R,OQ=1.5R.下列说法正确的是A .卫星1的运行周期大于卫星2的运行周期B .卫星2在 P 、Q 点的速度大小关系为P Q v v <C .卫星2在Q 点的速度Q v <D .如果卫星1的加速度为a ,卫星2在P 点的加速度为a p ,则 a <a p7.质量为m 的物体静止在粗糙的水平地面上,从t =0时刻开始受到方向恒定的水平拉力F 作用,F 与时间t 的关系如图甲所示。
甘肃省兰州市兰州第一中学2024年物理高三上期中学业质量监测试题注意事项:1.答题前,考生先将自己的姓名、准考证号码填写清楚,将条形码准确粘贴在条形码区域内。
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一、单项选择题:本题共6小题,每小题4分,共24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、2018年全球最具价值汽车品牌百强榜上榜的中国汽车品牌数从去年的15个已经上涨到22个了,其中共有9个新入品牌,发展非常迅速.某厂家为了测试新款汽车的性能,将两辆完全相同的汽车并排停在检测场平直跑道上,0t =时刻将两车同时启动,通过车上的速度传感器描绘出了两车的速度随时间的变化规律图线(甲为一条过原点的倾斜直线),图像中两阴影部分的面积21s s >,下列说法正确的是:A .1t 时刻甲车的加速度小于乙车B .1t 时刻甲车在前,2t 时刻乙车在前C .20t -时刻两车可能相遇2次D .20t -时刻甲车的平均速度大于乙车2、物体从某一高度自由下落,第1s 内就通过了全程的一半,物体还要下落多少时间才会落地( ) A .1s B .1.5s C .2sD .(21)s -3、登上火星是人类的梦想,“嫦娥之父”欧阳自远透露:中国计划于2020年登陆火星.地球和火星公转视为匀速圆周运动,忽略行星自转影响.根据下表,火星和地球相比A .火星的公转周期较小B .火星做圆周运动的加速度较大C .火星表面的重力加速度较小D .火星的第一宇宙速度较大4、如图所示,汽车用跨过定滑轮的轻绳提升物块A .汽车匀速向右运动,在物块A 到达滑轮之前,关于物块A ,下列说法正确的是A .将竖直向上做匀速运动B .将处于失重状态C .将处于超重状态D .将竖直向上先加速后减速5、图中弹簧秤、绳和滑轮的重量均不计,绳与滑轮间的摩擦力不计,物体的质量都是m ,在图甲、乙、丙三种情况下,弹簧秤的读数分别是1F 、2F 、3F ,则( )A .312F F F =>B .123F F F >=C .123F F F ==D .312F F F >=6、如图所示,由A 、B 组成的双星系统,绕它们连线上的一点做匀速圆周运动,其运行周期为T,A 、B 间的距离为L,它们的线速度之比=2,则( )A.AB角速度比为:B.AB质量比为:=C.A星球质量为:M A=D.两星球质量为:M A+M B=二、多项选择题:本题共4小题,每小题5分,共20分。
做题破万卷,下笔如有神甘肃省兰炼一中(兰州58中)2021届高三地理上学期建标考试试题①地形起伏较大,安全隐患多②贫困人口太多③游客太多,被迫搬迁④基础设施改造难A.①②④B.①②C.①④D.②③④北京时间2020 年7 月23 日12 时41 分,中国首次火星探测任务“天问一号”探测器在海南省文昌航天发射场由“长征五号”运载火箭发射升空,于当日 13 时 17 分 25 秒器箭分离,准确进入预定地火转移轨道。
8 月2 日,“天问一号”火星探测器进行了首次轨道修正。
据此完成6-7 小题。
6、“天问一号”探测器发射时()注意事项:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
全卷共300 分,考试时间150 分钟。
答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
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5.本试卷共6 页。
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一、选择题:本题共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。
在工业领域,产业链是工业部门之间具有投入——产出联系形成的生产链。
以往,我国部分工业园区在招商时对投资企业不加选择。
近年来,一些工业园区采用产业链招商模式,其基本做法是选择主导产业,围绕主导产业设计产业链,依据产业链选择投资企业。
据此完成1-2 小题。
1、采用产业链招商时,首要关注引进企业的()A. 产品种类B. 生产技术C. 经营规模D. 品牌效益2、采用产业链招商的主要影响有()①促进园区企业生产分工协作②推进园区循环经济发展③促进园区产业结构的多元化④提高园区的专业化水平A. ①③B. ②③C. ②④D.①④位于四川大凉山的阿土列尔村,坐落在海拔1400-1600m 断崖中部的台地上,附近有高山峡谷、溶洞温泉。
绝密★启用前甘肃省兰州市第一中学2021届高三毕业班上学期期中教学质量检测理综-化学试题(解析版)可能用到的相对原子质量:H-l B-ll C-12 0-16 Na-23 Mg-24 AI-27 P-31 S-32 CI-35.5 Ca-40 V-51 Fe-56 Cu-641. 某同学对所学部分化学知识归纳如下,其中有错误的一组是【答案】B【解析】【详解】A项,N2中含氮氮三键,键能大,性质稳定,可填充在食品袋防腐,乙醇具有可燃性,燃烧时放出大量的热,可用作燃料,co具有还原性,可冶炼Fe 等金属,A项正确;B项,甲醇有毒,食用少量甲醇可使人双目失明,大量食用可使人死亡,假酒中毒是由甲醇引起的,假盐中毒是由NaNO2引起的,瓦斯爆炸是由天然气引起的,B 项错误;C项,铁是构成血红蛋白的必须元素之一,缺铁易引起贫血,钙在人体中主要存在于骨骼和牙齿中,缺钙易得佝偻病或骨质疏松症,缺碘易得甲状腺肿大,C项正确; D项,油污易溶于汽油,去除衣服上的油污用汽油洗涤,水垢的主要成分是CaCO3 和Mg(OH)2,食醋含CH3COOH, CaCO3和Mg(OH)2能溶于CH3COOH,用食醋清除热水瓶中的水垢,把煤做成蜂窝状,增大接触面积,使煤燃烧更旺,D项正确;答案选B。
2. 下列说法正确的是()A. 检验某酸性溶液中C「和S。
;,选用试剂及顺序是过量Ba(NO3)2溶液、AgNO3 溶液B. 将足量C02和S02的混合气体分别通入BaCg溶液、Ba(NC)3)2溶液中,最终都无沉淀生成C. 将铁粉加入FeCg CuCb混合溶液中,充分反应后剩余的固体中必有铁D. 用加热分解的方法可将NH4CI固体和Ca(OH)2固体的混合物分离【答案】A【解析】【详解】A.检验某酸性溶液中C「和S。
;,酸性溶液中不可能存在亚硫酸根离子, 所以选用试剂及顺序是过量Ba(NO3)2溶液、AgNO3溶液,先加入过量的硝酸钥溶液, 产生白色沉淀证明含有硫酸根离子,过滤可除去硫酸根离子,再加入硝酸银溶液产生白色沉淀证明含有氯离子,故A正确;B. 二氧化碳与氯化钥、硝酸钥溶液均不反应,而二氧化硫与氯化钥溶液不反应,但与硝酸钥溶液发生氧化还原反应生成硫酸根离子,与钥离子结合为硫酸钥白色沉淀,故B错误;C. 根据离子的氧化性的强弱,加入Fe后先与铁离子反应生成亚铁离子,再与铜离子反应生成Cu和亚铁离子,所以最终的固体中一定有Cu,不一定有Fe,故C错误;D.氯化铉与氢氧化钙固体混合加热,则发生反应生成氯化钙、水和氨气,故D错误。