甘肃省武威第二中学2020届高三上学期第二次阶段性(10月)考试物理试题(扫描版,无答案)
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武威二中2020年高三第三次月考物理试卷一、单选题1.如图所示,质量为m 的小车在水平恒力F 推动下,从山坡(粗糙)底部A 处由静止起运动至高为h 的坡顶B ,获得速度为v A B ,、之间的水平距离为s ,重力加速度为g 下列说法正确的是( )A .小车重力所做的功是mghB .推力对小车做的功是212mv mgh + C .合外力对小车做的功是212mv mgh + D .阻力对小车做的功是212mv mgh Fs +- 2.如图所示,电荷量为1q 和2q 的两个点电荷分别位于P 点和Q 点。
已知在P Q 、连线上某点R 处的电场强度为零,且2PR RQ =。
则( ) A.122q q = B.124q q =C.122q q =-D.124q q =-3.如图所示,为某示波管内的聚焦电场,实线和虚线分别表示电场线和等势线.两电子分别从a 、b 两点运动到c 点.a 、b 两点的场强大小分别为E a 和E b ,电势分别φa 和φb ,电场力对两电子做功分别为W a 和W b ,两电子在a 、b 两点的电势能分别为E pa 和E pb .则( )A.E a <E bB.φa <φbC.W a <W bD.E pa <E pb4.如图所示,直线a b 、和c d 、是处于匀强电场中的两组平行线,M N P Q 、、、是它们的交点,四点处的电势分别为M ϕ、N ϕ、P ϕ、Q ϕ,一电子由M 点分别运动到N 点和P 点的过程中,电场力所做的负功相等,则( )A.直线a 位于某一等势面内,M Q ϕϕ>B.直线c 位于某一等势面内,M N ϕϕ>C.若电子由M 点运动到Q 点,电场力做正功D.若电子由P 点运动到Q 点,电场力做负功5.如图所示,在某电场中画出了三条电场线,C 点是,A B 连线的中点。
已知A 点的电势为30V,A B ϕ=点的电势为 ΨB=-20,则下列说法正确的是( )A.C 点的电势5V c ϕ=B.C 点的电势5V c ϕ>C.C点的电势5V c ϕ<D.负电荷在A 点的电势能大于在B 点的电势能 6.下列物理量的单位是“法拉”的是( ) A.电场强度B.电容C.磁感应强度D.磁通量7.如图所示,一束可见光 a 从玻璃砖射向空气,分成 b 、c 两束单色光。
甘肃省武威第二中学2020届高三化学上学期第二次阶段性(10月)考试试题满分100分;考试时间:90分钟;注意事项:1.答题前填写好自己的姓名、班级、考号等信息2.请将答案正确填写在答题卡上第I卷(选择题)一、单选题(每空2分,共50分)1.化学在生产和生活中有着重要的作用。
下列有关说法不正确...的是( )NH Cl溶液做除锈剂A.焊接金属时常用4B.嫦娥系列卫星中使用的碳纤维,是一种新型无机非金属材料C.只要符合限量,“食用色素”、“亚硝酸盐”可以作为某些食品的添加剂D.PM2.5是指大气中直径小于或等于2.5微米的颗粒物,是发生雾霾天气的主要原因,这些颗粒物扩散在空气中都会形成胶体2.下面的“诗”情“化”意,分析正确的是()A.“粉身碎骨浑不怕,要留清白在人间”只发生了物理变化B.“日照澄洲江雾开”中伴有丁达尔效应C.“试玉要烧三日满,辨材须待七年期”中“玉”的成分是硅酸盐,该句诗表明玉的硬度很大D.“绿蚁新醅酒,红泥小火炉”,“新醅酒”即新酿的酒,在酿酒过程中,葡萄糖发生了水解反应3.我们常用“往伤口上撒盐”来比喻某些人乘人之危的行为,其实从化学的角度来说,“往伤口上撒盐”的做法并无不妥,甚至可以说并不是害人而是救人。
那么,这种做法的化学原理是()A.胶体的电泳 B.血液的氧化还原反应C.血液中发生复分解反应 D.胶体的聚沉4.下列有关物质的分类或归类正确的是()A.混合物:水玻璃、碱石灰、铝热剂B.酸性氧化物:SO2、CO2、NO2C.强电解质:明矾、硫酸钡、硫酸溶液D.同素异形体:H2、D2、T25.在前一个分散系中慢慢地滴入后一种分散系所观察到的现象不是先沉淀后变澄清的是( )A.氢氧化铁胶体中滴加硫酸B.偏铝酸钠溶液中滴加盐酸C.氯化铝溶液中滴加烧碱溶液D.氯化铝溶液中滴加氨水6.下列实验及检验方法合理..的是 ( )A.A B.B C.C D.D7.下列有关物质的性质与应用均正确的是( )A.Na2O2是碱性氧化物,具有强氧化性可用于杀菌消毒B.胶体与溶液的本质区别是能否出现丁达尔现象C.蔗糖溶液、硫酸钡和水分别属于非电解质、强电解质和弱电解质D.煤炭经气化、液化和干馏等过程,可获得清洁能源和重要的化工原料8.将体积相等、质量分数也相等的氨水和硫酸分别用等体积的水稀释,所得溶液的质量分数分别为a%和b%,则a与b的关系为( )A.a=b B.a<b C.a>b D.无法确定9.下列说法正确的是( )A.同温同压下,相同体积的物质,其物质的量一定相等B.标准状况下气体摩尔体积约为22.4LC.0.5 L 1 mol/L FeCl3溶液与0.2 L 1 mol/L KCl溶液中的Cl-的数目之比为15∶2 D.100 mL 1 mol/L NaCl溶液与50 mL 1 mol/L AlCl3溶液中Cl-物质的量浓度相等10.设N A表示阿伏加德罗常数,下列叙述正确的是()A.标准状况下,1molFe分别与足量的盐酸和水蒸气反应转移的电子数均为2N AB.11.2LH2中含有的原子数为N AC.Na2O与Na2O2的混合物共1mol,阴离子数目为N AD.1.0L1mol/L的Na2SO4水溶液中含有的氧原子数目为4N A11.设N A表示阿伏加德罗常数的值,下列说法中不正确的是( )A.14g由N2和13C2H2组成的混合物中,所含中子数为7N AB.CH4与白磷(P4)都为正四面体结构,则1mol CH4与lmolP4所含共价键的数目均为4N A C.反应N2(g)+3H2(g)2NH3(g) ΔH=-92.4kJ/mol,若放出热量4.62kJ,则转移电子的数目为0.3N AD.常温下,含0.5molNH4NO3与xmolNH3·H2O的中性溶液中,含有NH4+的数目为0.5N A12.N A为阿伏加德罗常数的数值,下列说法中正确的是( )①0.5molO3与11.2LO2所含的分子数一定相等②标准状况下,22.4L氯气与足量铝充分反应,转移的电子数为3N A③通常状况下,N A个CO2分子占有的体积为22.4L④常温常压下,92g的NO2和N2O4混合气体含有的原子数为6N A⑤常温下,4.4g CO2和N2O(不反应)混合物中所含有的原子数为0.3 N A⑥在反应KIO3+6HI===KI+3I2+3H2O中,每生成3molI2转移的电子数为6N A⑦标准状况下,22.4 L SO3含有的分子数为N A⑧在常温常压下,1 mol O2含有的原子数为2N A.⑨物质的量浓度为0.5 mol·L-1 MgCl2溶液中,含有Cl-个数为N A⑩将100 mL 0.1 mol·L-1的FeCl3溶液滴入沸水中可制得Fe(OH)3胶粒数目为0.01N AA.①②④⑧B.④⑤⑧C.③⑥⑨⑩D.④⑤⑧⑨13.把aL含硫酸铵和硝酸铵的混合液分成2等份,一份需用bmol烧碱刚好把铵全部反应,另一份与氯化钡溶液反应时,消耗cmol氯化钡。
武威二中2020届高三第二次考试政治试题一、选择题(每小题2分,共62分)1.农夫山泉新品髙端矿泉水取自长白山莫涯泉,是举世罕见的“低钠淡矿泉”,属于世界上最珍稀的一类矿泉水,此款玻璃瓶高端矿泉水定价约为40元(750ml)。
该矿泉水()①是普通矿泉水的替代品,消费者的喜好决定其价值②其价值决定于市场的火爆程度,受产品质量的影响③是使用价值和价值的统一体,其价值可由货币来衡量④其价格受到生产者供应量和消费者需求量的直接影响A.①②B.②③C.③④D.①④2.2020年,我国规模以上国有控股工业企业拥有资产总计42.5万亿元,占全部规模以上工业企业资产的比重由2020年的40.6%下降到37.9%。
部分行业资产比重如图1,其中,农副食品加工、通用设备制造、纺织行业分别从15%、35.7%、12.8%下降到7.6%、20.2%、5.5%。
国有经济在某些行业比重下降A.未改变国有经济的主导作用B.使非公有资产在社会总资产中占优势C.不利于国有经济的整体发展D.使非公有制经济对国民经济控制力上升3.近年来,北京打响蓝天保卫战,主要大气污染物排放量呈下降趋势,空气质量明显好转,下列分析正确的有:①清洁空气具有公共物品属性,需要政府干预②政府干预提高了排放者所承担的成本③市场自发调节作用和自然界自净能力增强④空气产权难以界定清晰,减少了污染物的排放量A. ①②B. ①③C. ②④D. ③④4.坚决打赢脱贫攻坚战。
让贫困人口和贫困地区同全国一道进入全面小康社会是我们党的庄严承诺。
注重扶贫同扶志、扶智相结合,深入实施东西部扶贫协作,重点攻克深度贫困地区脱贫任务,确保到二O二O年我国现行标准下农村贫困人口实现脱贫,贫困县全部摘帽,解决区域性整体贫困,做到脱真贫、真脱贫。
国家实施这一举措的依据()①劳动者就业是社会存在和发展的基础②共同富裕是中国特色社会主义的根本原则③社会主义本质的体现,充分发挥社会主义制度优越性④公有制是社会主义市场经济的根本原则A.①②B.①④C.②③D.③④5.2020年6月19日,《个人所得税法修正案(草案)》提请十三届全国人大常委会第三次会议审议,这是个税法自1980年出台以来第七次大修,个税起征点由每月3500元提高至每月5000元(每年6万元)。
武威二中高三第二阶段考试物理考试题第一卷一、 选择题(每小题4分,共32分)1. 汽车速度为10米/秒,自行车速度为4米/秒,两车在一条直线上做同方向的匀速直线运动,当汽车追上自行车后做加速度为2米/秒的匀减速运动。
这两车再次相遇和第一次相遇处的距离是( ) A. 6秒 24米 B. 4秒 20米 C. 6.25秒 25米 D. 4秒 25米2、根据分子动理论,下列关于气体的说法中正确的是( ) A 、气体的温度越高,气体分子间作用力越小 B 、气体的压强越大,气体分子的平均动能越大 C 、气体分子的平均动能越大,气体的温度越高 D 、气体的体积越大,气体分子之间的相互作用力越大3、质量相等的有两个人造地球卫星A 和B ,分别在不同的轨道上绕地球作匀速圆周运动。
两卫星的轨道半径的分别为A r 和B r ,且B A r r 。
则A 和B 两卫星相比较,以下说法正确的是( ) A 、卫星A 的运行周期较大 B 、卫星A 受到的地球引力较大 C 、卫星A 的动能较大 D 、卫星B 的机械能较大4、如图所示,轻弹簧下端固定在水平地面上,弹簧位于竖直方向,另一端静止于B 点。
在B 点正上方A 点处,有一质量为m 的物块,物块从静止开始自由下落。
物块落在弹簧上,压缩弹簧,到达C 点时,物块的速度为零。
如果弹簧的形变始终未超过弹性限度,不计空气阻力,下列更判断正确的是( )A 、物块在B 点时动能最大B 、从A 经B 到C ,再由C 经B 到A 的全过程中,物块的加速度的最大值等于gC 、从A 经B 到C ,再由C 经B 到A 的全过程中,物块作简谐运动D 、如果将物块从B 点由静止释放,物块仍能到达C 点5、一辆汽车从静止开始做加速直线运动,运动过程中汽车牵引力的功率保持恒定,所受的阻力不变,行驶2min 速度达到10m/s 。
那么该列车在这段时间内行驶的距离( ) A 、一定大于600m B 、一定小于600m C 、一定等于600mD 、可能等于1200m6、如下图(上)所示,一条均匀的弹性绳,1、2、3……是绳上一系列等间距的质点,它们之间的距离均为1m 。
第二次月考物理试题【陕西版】一、选择题:本题共12小题(每小题3分,共36分。
全部选对的得3分,选不全的得2分,有选错或不答的得0分。
)1.(多选)下列关于力的说法正确的是A. 作用力和反作用力作用在同一物体上B. 太阳系中的行星均受到太阳的引力作用C运行的人造地球卫星所受引力的方向不变D.伽利略的理想实验说明了力不是维持物体运动的原因2•如图所示,A、B两物体叠放在一起,以相同的初速度上抛,运动过程中所受阻力均是其重力的K倍。
下列说法正确的是:A. 在上升和下降过程中A对B的压力一定为零B. 上升过程中A对B的压力大于A物体受到的重力C. 下降过程中A对B的压力大于A物体受到的重力D. 在上升和下降过程中A对B的压力等于A物体受到的重力3.(多选)如图为质量相等的两个质点A、B在同一直线上运动的v t图像,由图可知A. 在t时刻两个质点在同一位置B. 在t时刻两个质点速度相等C. 在0 t时间内质点B比质点A位移大D.在0 t时间内合外力对两个质点做功相等4 •如图所示,物体沿斜面由静止滑下,在水平面上滑行一段距离后停止,物体与斜 面和水平面间的动摩擦因数相同,斜面与水平面平滑连接。
下图中v 、& f 和s分别表示物体速度大小、加速度大小、摩擦力大小和路程。
图中正确的是:5 •如图所示,顶端装有定滑轮的粗糙斜面体放在水平地面上, 绳连接,并处于静止状态(不计绳的质量和绳与滑轮间的摩擦) 相连的一段细绳与斜面平行•现用水平向右的力 F 缓慢拉物体B ,使连接物体B 的 细绳向右拉开一个小角度,此过程中斜面体与物体 确的是:A. 物体A 所受斜面体的支持力大小一定不变B. 物体A 所受斜面体的摩擦力大小一定不变C. 斜面体所受地面的摩擦力大小一定不变D. 细线所受拉力的大小一定不变6. “蹦极”就是跳跃者把一端固定的长弹性绳绑在踝关节等处, 从几十米高处跳下 的一种极限运动。
某人做蹦极运动,所受绳子拉力 F 的大小随时间t 变化的情况如 图所示。
2019-2020武威二中高三英语考卷考试时间:100分钟;命题人:注意事项:1.答题前填写好自己的姓名、班级、考号等信息2.请将答案正确填写在答题卡上第一卷第一部分阅读理解(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,从每题所给的四个选项(A、B、C和D)中,选出选项.ATheme Park Tourist is your essential source for news, reviews and park guides for theme parks in Orlando, Florida and beyond. We offer a special perspective (观点) on all the latest news from Walt Disney World, Universal Orlando and other parks and resorts, and are proud to deliver some of the most in-depth, well-researched articles about theme parks available anywhere on the web. Here are a few of the features we have to offer:● Latest news — regular updates from theme parks around the world, including Walt Disney World, Universal Orlando and many more.● In-depth features — fascinating articles about almost every aspect of theme parks- behind the scenes information and more.● Park reviews and guides — all of the key information for over 90 theme parks, including reviews of attractions, restaurants and hotels.● Rehab schedules — listings of temporary attraction closures that could affect your theme park visit.Contact usWe are always keen to receive details of upcoming new attractions, ride repair news, special offers and any other theme park news—click here to get in touch by e-mail.Learn moreAdvertise with us — information for companies interested in advertising on Theme Park Tourist.Donate (捐赠) to us — Are you interested in donating to Theme Park Tourist? Click here to learn more.1.Theme Park Tourist is probably a(n) ________.A.person guiding people to theme parksB.website offering information about theme parksC.organization providing service for theme parksD.magazine collecting pictures of theme parks2.Which of the following can you refer to if you want to know whether a theme park is available?A.Latest news. B.In-depth features.C.Park reviews and guides. D.Rehab schedules.3.Which can not be found on Theme Park Tourist?A.People’s donation to theme parks.B.Up-to-date news about Walt Disney World.C.Tourists’ comments on restaurants of Universal Orlando.D.Newly-opened attractions of theme parks.BMy daughters are lovely and attractive. The 4-yearold has big blue eyes and easy laughter. The 7-year old’s long strawberry blond hair and sweet smile are already turning the boys’ heads. I love everything about these girls. and they know it.But I try not to tell them they’ re beautiful. My young daughters are totally innocent about the pressures of being a woman i n our society. They know nothing about plastic surgery, diets. “feeling fat”, or eating disorders. We adults know all too much about such things and in the face of this cruel reality we tend to start telling our girls,as soon and often as possible, how bea utiful they are. Here’s the thing. though. What we’re also doing is bringing the beauty pressure home to our littlest girls. The more I talk about beauty and looks, even in a positive way. ,the more I’m conveying the importance of those things.However, it doesn’t mean I don’t praise my girls. Instead of saying “You look beatutiful!” I might say the more specific “Don’t you look fancy today!” or “Those colors go so well together. ” It means that I treat my daughters not as my little dol ls, but as real people who are developing their own sense of self and style. It means that they are in change of how they look.Naturally, I buy most of my girls clothes. But I don’t usually manage their outfit (整套衣服)choices. My daughters can go girly with necklaces and head-to-toe pink, or they can choose to give up dresses altogether. Of course we’ve seen some mismatching, but they own those styles. They never ask if they look pretty, and they walk with an easy confidence that has nothing to do with what l or anyone else will say about how they look. And that’s the confident spirit I want them to take into their teens and adulthood.4.What do the author’s two daughters have in common?A Both like to smile.B.Both have blond hair.C.Both like strawberries.D.Both have big blue eyes.5.Why is the author unwilling to tell her girls that they are beautiful?A.She prefers inner beauty.B.She expects them to face reality.C.She wants them to focus less on it.D.She doesn’t think they can understand it.6.How does the author treat her daughters?A.She avoids praising them.B.She pays attention to their unique style.C.She is particular about their clothes.D.She sets strict clothing rules for them.7.Which of the following best describe the author’s daughters?A.They are fully confident.B.They are highly dependentC.They tend to take advice from their mother.D.They have a good taste in dressing themselves.CChinese people are now living happier and longer than before. According to the latest study, the number of people over 60 years old is 130 million, making up 10 percent of the whole population, and increases at a rate of 3 percent per year. This marks that China has stepped into the aged society. It is the Chinese tradition to respect, love, support, and help old people, and the aging problem has received more and more attention from the society.China has built the system to protect and serve old people’s legal (法律的) rights and interests, gradually developed social insurance, public health services and social welfare (福利) projects for old people, and also applied the minimum living standard protection (最低生活保障) system for the aged who are unable to work and receive no supports. Now, China is bringing the aging problem into the work of sustainable (持续的) development according to China’s conditions, to build and develop a social security system for old people, set up a system combined with the state, collectives (集体) and families to solve the problem of “the elderly should be provided for”. The life of China’s old people is more colorful along with the fast and sound economic development of the country.Old people in today’s China who don’t have to consider their food and clothing hope to live more colorfully. The happy psychology (心态) of the aged makes them______knowledge. Strong and healthy old people can be seen everywhere of the country. They learn new knowledge, surf the Internet, practice handwriting and drawing, and take part in fashion shows, exercises and entertainments. Their active and sound living attitude encourages the youth around and they are in fact an important role in ensuring a stable and peaceful society.8.The underlined part “thirsty for” (in the last paragraph) means “________”.A.want to drink water B.feel hungry C.want to learn D.want to teach9.Which of the following is NOT the author’s idea?A.China has entered an aged society.B.All people in the society should care for the old.C.Old people’s active living ways have a good effect on the young.D.The society hasn’t done enough for o ld people.10.What would be the best title for the passage?A.How to respect old people B.Old people’s life in ChinaC.Old people’s problem D.Old people’s wishes11.From the passage we can know that the author is ________ about the aging problem in China.A.disappointed B.hopeful C.worried D.doubtfulDMy friend Jason and I wanted to do something to help other people who are less lucky and help us grow at the same time. After we decided that we would volunteer in Nepal, I did some surveys on the Internet and I found an organization called Volunteer(志愿者) Nepal and felt strongly that it was the right choice for us.While making our plans, Jason and I realized that others might like the chance to be a part of our experience. So before leaving for Nepal, we asked the people we know whether they would be interested in donating(捐赠) money or goods to Nepal Orphans Home.One friend, whose family owns a shop called Drake Supermarket, told others about it. Many people wanted to donate something. We received donations that filled 29 boxes with sporting goods, toys, coloring books, pencils, children's books, and more, The boxes were later taken to Drake's warehouse(仓库) where I prepared them for shipment. Drake agreed to ship them to Nepal for free .The boxes had arrived at the Volunteer House when we arrived there. The next day, Jason and I opened the boxes. The children from the orphanages() stood in a line and were able to choose a gift. This took about an hour, but the lookson their faces and the happiness that we saw in their eyes made it one of the best days of our life.We visited the orphanages there in the following days. Being with the children at the orphanages was both sad and wonderful. I’m sure that anyone who has volunteere d will understand what I mean by that. My experience as a volunteer was very useful. It has changed me as a person and the way I viewed life in the past.12.The writer did some surveys on the Internet probably to_______.A.get in touch with some students B.decide country to volunteerC.find some friends to volunteer with him D.find an organization for volunteers13.Before leaving for Nepal, the writer______.A.asked his friends to go with himB.filled 29 boxes with the things he boughtC.received many donations from other peopleD.bought many things in Drake Supermarket14.What can we learn from Paragraph 4?A.The writer didn't expect the kids would love the gifts.B.The children were very happy to receive the gifts.C.The children had never received gifts from others before.D.The writer and his friend took the gifts to the orphanages.15.The writer thinks that his experience as a volunteer was______.A.useful B.embarrassingC.boring D.disappointing七选五(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。
甘肃省武威第二中学2021届高三数学上学期第二次(10月)月考试题一、选择题(共12小题,每小题5分,共60分) 1、已知集合,则( )A .B .C .D .2、设,,则是成立的 ( )A . 充分不必要条件B . 必要不充分条件C . 充分必要条件D . 既不充分也不必要条件 3、下列有关命题的说法正确的是( )A . 命题“若21x =,则1x =”的否命题为:“若21x =,则1x ≠”.B . “1x =-”是“2560x x --=”的必要不充分条件.C . 命题“x R ∃∈,使得210x x ++<”的否定是:“x R ∀∈,均有210x x ++<”.D . 命题“若x y =,则sin sin x y =”的逆否命题为真命题. 4、设函数,则函数的定义域为( )A .B .C .D .5、已知,则( )A .B .C .D .6、若直线与曲线相切于点,则( ) A . 4 B . 3 C . 2 D . 1 7、函数的图象是( )A .B .C .D .8、 定义在上的偶函数满足:对任意的实数都有,且,。
则的值为( )A . 2021B . 1008C . 1010D . 2 9、若函数在区间内单调递增,则实数的取值范畴是( )A .B .C .D .10、函数在内存在极值点,则( ) A . B . C . 或 D .或11若函数有两个零点,则实数的取值范畴是( ) A .B .C .D .12.已知函数()(ln )f x x x ax =-有两个极值点,则实数a 的取值范畴是 ( ) A .(,0)-∞ B .(0,1) C .1(0,)2D .(0,)+∞二、填空题(共4小题,每小题5分,共20分) 13、已知函数 ,则__________.14、已知奇函数,当时,有,则时,函数__________.15、已知函数是定义在上的偶函数,且关于任意的都有,,则的值为______.16、已知函数,① 当时,有最大值; ② 关于任意的,函数是上的增函数;③ 关于任意的,函数一定存在最小值;④ 关于任意的,都有.其中正确结论的序号是_________.(写出所有正确结论的序号)三、解答题(本大题共6小题,共70分) 17、(10分)设:实数满足,其中;:实数满足.(1)若,且为真,求实数的取值范畴;(2)若是的必要不充分条件,求实数的取值范畴.18、(12分)设函数是定义在R 上的函数,对任意实数x ,有().3312+-=-x x x f(1)求函数的解析式;(2)若函数在()()()()R m x m x f x g ∈++-=,121在⎪⎭⎫⎢⎣⎡∞+,23上的最小值为﹣2,求m 的值.19、(12分)已知函数f (x )的定义域为(-2,2),函数g (x )=f (x -1)+f (3-2x ). (1)求函数g (x )的定义域;(2)若f (x )是奇函数,且在定义域上单调递减,求不等式g (x )≤0的解集.20、(12分)已知函数().ln 24x xaax x f --= (1)当时,求曲线在点()()1,1f 处的切线方程;(2)若函数在其定义域内为增函数,求实数的取值范畴;21、(12分)已知函数 ,()()R a xax g ∈+-=,1 (1)若,求函数的极值; (2)设函数,求函数的单调区间;22、(12分)已知函数.(1)当时,求的极值; (2)当时,讨论的单调性;(3)若对任意的 恒有成立,求实数的取值范畴.高三第二次月考数学答案一、CBDBA BBCDA AC二、13、4 14、 15、4 16、② ③三、解答题17、(1)1<x<3.(2)1≤a≤2。
绝密★启用前武威二中2019—2020(1)高三年级第二次阶段性考试数学注意事项:1.答题前填写好自己的姓名、班级、考号等信息 2.请将答案正确填写在答题卡上第I 卷(选择题)一、选择题:(本大题共12小题,每小题5分,共60分)1.设,,则( )A .B .C .D .2.已知复数z 满足11zi z-=-+,则z =( ). A .1 BC .2 D.3.已知定义在区间(0,2)上的函数y=f (x )的图象如图所示,则y=﹣f (2﹣x )的图象为( ). B . . .4.参数方程4cos 3sin x y θθ=⎧⎨=⎩(θ为参数)表示的曲线是( )A .以(为焦点的椭圆B .以(4,0)±为焦点的椭圆C 的椭圆D .离心率为35的椭圆 5.已知()3log ,0{,0xx x f x a b x >=+≤,且()25f -=, ()13f -=,则()()3f f -=( ) A .-2 B .2 C .3 D .-3 6.下列有关命题的说法中错误的是( ) A .若为真命题,则中至少有一个为真命题.B .命题:“若是幂函数,则的图象不经过第四象限”的否命题是假命题. C .命题“,有且”的否定形式是“,有且”.D .若直线和平面,满足.则“” 是“”的充分不必要条件. 7.定义在上的偶函数满足,且,则的值为( ) A . B .C .D .8.(2014·大连模拟)已知f(x)=alnx+x 2,若对任意两个不等的正实数x 1,x 2都有>0成立,则实数a 的取值范围是( )A.[0,+∞)B.(0,+∞)C.(0,1)D.(0,1] 9.如图所示,平面直角坐标系中,阴影部分是由抛物线及线段围成的封闭图形,现在在内随机的取一点,则点恰好落在阴影内的概率为A .B .C .D .10.设函数()f x 在R 上可导,导函数为(),(1)()f x y x f x ''=-图像如图所示,则()A .()f x 有极大值(2)f ,极小值(1)fB .()f x 有极大值(2)f -,极小值(1)fC .()f x 有极大值(2)f ,极小值(2)f -D .()f x 有极大值(2)f -,极小值(2)f11.已知函数2ln ()xf x x=,若方程()0f x a -=恰有两个不同的实数根,则实数a 的取值范围是( ) A .102a e<<B .12a e <C .2a e <D .12a e>12.如果函数对于区间D 内任意的,有()()()12n f x f x f xn++≤12n x x x f n ++⎛⎫⎪⎝⎭成立,称是区间D 上的“凸函数”.已知函数sin y x =在区间[]0,π上是“凸函数”,则在△ABC 中,的最大值是( )A .B .C .D .第II 卷(非选择题)二、填空题:(本大题共4小题,每小题5分,共20分)13.函数43)1ln()(2+--+=x x x x f 的定义域为 .14.=+4log 35.0215.已知函数 ()()8log 30,19a y x a a =+->≠ 的图象恒过定点 A ,若点 A 也在函数 ()3xf x b =+ 的图象上,则 ()3log 2f = ________________.16.13.已知定义域为[]1,21a a -+的奇函数()()321f x x b x x =+-+,则()()20f x b f x -+≥的解集为________________.三、解答题:(本大题共6小题,共70分。
甘肃省武威第一中学2019-2020学年高一物理上学期10月段考试题(含解析)一、单项选择题1.下列有关运动的描述中,参考系的选取符合描述的是( ) A. “小小竹排江中游”,是以竹排为参考系的 B. “飞流直下三千尺”,是以飞流作为参考系的 C. “轻舟已过万重山”,是以万重山为参考系的 D. “钱塘江潮水扑面而来”,是以潮水为参考系的 【答案】C 【解析】【详解】“小小竹排江中游”,是说竹排相对于河岸等的运动,参考系是河岸,故A 错误;飞流是相对于山在动,故参考系是山,故B 错误;“轻舟已过万重山”,研究的是轻舟相对于山的运动,故是以万重山为参考系的参考系的,故C 正确;潮水扑面而来是指潮水相对于我们来说的,故是以观察者为参考系的,故D 错误;故选C 。
【点睛】参考系的选取是任意,选择不同的参考系物体的运动是不同;在分析时首先要明确题意才能正确找出参考系.2.水平地面上竖直放一个边长为a 的正方形薄板,其左下角顶点上有一点A ,如图所示:现使该正方形在地面上不打滑地顺时针翻滚一周,则A 点发生的位移大小和路程正确的是A. 4a 、212π⎛+ ⎝⎭a B. 3a 、212π⎛+ ⎝⎭ a C. 4a 、32πa D. 3a 、32πa 【答案】A 【解析】【详解】设正方形的四个顶点依次是ABCD ,则翻滚后ACD 各点的位置如图,可知A 点的位移是4a;结合图象可知,以B点为支点转动的过程中,A点轨迹是半径为a的14圆;以C′点为支点转动的过程中,A点轨迹是半径为2a的14圆;以D′点为支点转动的过程中,A点轨迹是半径为a的14圆;所以A点的路程为:111222214442s a a aπππ⎛⎫⎛⎫=++⋅⨯=+⎪⎪ ⎪⎝⎭⎝⎭;A. 位移4a、路程212π⎛⎫+⎪⎪⎝⎭a与计算结果一致,故A 正确;B. 位移3a与计算结果不一致,故B错误;C.路程32πa 与计算结果不一致,故C错误;D. 路程3a、位移32πa 均与计算结果不一致,故D错误。