高二学年周测
陕西省延安市宝塔区2022-2023学年高二上学期网课周测英语试题
2022-2023学年高二上学期网课英语周测一、阅读理解(每题2.5分,共37.5分)With summer break coming up for children across the United States,now it 's time to plan a fantastic summer trip for your family.Her are a few of the best places you can take your family to this year and any year for that matter.Montgomery,AlabamaMontgomery is an important site for learning about the history of the Civil Rights Move-ment. Children with their families can visit the Civil Rights Memorial Center to take a tour of the exhibits and learn about the hopes and dreams and the struggle for equality in the country.Kenai Peninsula,AlaskaIf you are looking for a wonderful outdoor adventure,the Kenai Peninsula in Alaska is a fantastic trip. While visiting this region of Alaska,you can explore the Kenai Mountains in Kenai Fjords(峡湾)National Park,where your kids can see glaciers,fjords and especially the Harding Icefield Fishing is another wonderful activity to enjoy at this destination.Channel Islands,CaliforniaThe Channel Islands are an amazing archipelago (群岛)) off the coast of California. Here visitors can enjoy the Channel Islands National Park. The Channel Islands National Park protects five of the islands. Within the protection of the park there is a wide variety of wildlife,as well as natural and cultural resources. You should keep an eye out for seals,sea lions,dolphins,and many more.Memphis,TennesseeMemphis is a fantastic destination for families that enjoy music. This city played a great role in the evolution of Blues music. You certainly won't want to miss out on a trip to Graceland while exploring Memphis.The home of Elvis Presley is open to visitors for tours,where you can travel through the life and rise of Elvis.1.Where can you enjoy exhibitions during your trip?A.Montgomery B.Kenai Peninsula. C.Channel Islands. D.Memphis.2.What can you do in the Kenai Peninsula?A.Listen to some music. B.Explore various wildlife.C.Try risking outdoors. D.Watch all kinds of fishes.3.What’s the main purpose of the text?A.To give children some instructions.B.To introduce some trip sites for families.C.To advertise some famous attractions.D.To encourage children to learn in summer.Born in Shanghai in 1981, Yang Ji studied accounting in college before becoming a civil servant in 2005, fulfilling his parents’ wishes of him securing a stable job. But he only lasted a year in that role. “I’ve loved animals since I was a child. I raised many animals, such a s goldfish, turtles and pigeons during my school years,” he says. “Raising animals was my hobby and my dream.”Yang made a career switch in 2006, and started working at a chicken farm to learn about breeding (培育) birds.“The first five years were very difficult for me. I made many mistakes along the way, but I also learned a lot,” he says. “For example, there are huge differences between raising a chicken and a swan.”He shared that the first swans he bought eventually became crippled (瘸的), and some even died, even though he went to great lengths to feed them good food and ensure that their pens were warm. But after consulting with experienced experts, he learned that the animals just needed to eat grass. In addition, the swans should not have been cooped up in their pens but let out to exercise in the cold water.He then went to learn more about the trade with experienced bird keepers and experts from zoos, working alongside them for days and observing how they raised the animals.In 2011, Yang bought a small, deserted zoo and renovated (改造) it for his rare-bird breeding center. In 2014, he received his license to breed first-tier protected animals from the National Forestry and Grassland Administration. He has since introduced several endangered birds to his center.“They’re all native species in China and I’ve succeeded in breeding and raising their babies,” he says. His breeding center, which supplies birds to zoos around China, isn’t all about profit. Yang says that he is planning to release some endangere d birds to help grow the population in the wild. “I am passionate with my work and never feel exhausted,” he says. “Living with the birds and seeing them every day makes me a happy man.”4.Yang Ji started working at a chicken farm because ___________.A.he loved raising chickensB.he wanted to learn bird raisingC.chickens were much easier to raiseD.he had a preference for small animals5.What mistake did Yang Ji make when he first started breeding swans?A.He fed wrong food to the swans.B.He didn’t keep the swans warm.C.He bought some crippled swans.D.He let the swans swim in cold water.6.What do we know about Yang Ji’s breeding center?A.It was rebuilt on an open grassland.B.It has kept all kinds of endangered animals since 2014.C.It intends to increase the number of some endangered birds by setting them free.D.It aims at making money out of supplying endangered birds to zoos all over China.7.Which of the following can be the best title of this passage?A.Yang Ji and His Birds B.From Chickens to SwansC.A Successful Career Switch D.Flying High with His DreamsTo give a tip or not? If so, how much? They can be headaches even for the most experienced tourists. This week, the main political parties in the UK have finally come to rescue by passing laws to forbid bars and restaurants taking tips from the customers.However, not every country in the world takes the matter as seriously as the British, who are believed to have invented the custom in the 17th century — originally as a noble practice of giving small gifts to the so-called “inferior (低等的) classes”. Later, tipping has become a habit widely accepted in the world, although it is influenced by a nation’s culture and values.A common joke among Americans is that only getting tax return is more confusing than tipping. Tips were imported into the country in the 19th century, when wealthy Americans began travelling to Europe. The custom was originally disapproved in the US. Critics accused tippers of creating a class of p eople who “begged for favors”. Fast forward to the 21st century and you will still find Americans debating the pros and cons. But tipping is now completely ingrained (根深蒂固的) in the national soul.Like many Asian countries, China is largely a no-tipping culture for decades it was actually prohibited and considered illegal. To this day, it remains relatively uncommon.Japan’s complex manner system includes tipping. It is socially acceptable on special occasions such as weddings, but on the other occasions, it can actually make the receiver feel ashamed, if not abused. Even onoccasions where tips are expected,the money is expected to be sealed in special envelopes as a sign of gratitude and respect. Otherwise, it will be refused because tips are usually included in the payment for the service.8.What’s the original purpose of tipping?A.To please the ordinary people. B.To praise people’s good deeds.C.To indicate people’s thanks to the poor. D.To show noble kindness to the lower class.9.What does the underlined sentence in paragraph 3 mean?A.Americans are used to giving tips. B.It is quite normal to tip in America.C.Tipping is very complex in the US. D.Getting tax return is simpler than tipping.10.What can be inferred about tipping in Asia?A.Tips are totally forbidden in China. B.Tipping will become popular very soon.C.Good services should be put before tips. D.Tips can be accepted for special celebrations.11.In which section of a newspaper may this text appear?A.Law B.Culture C.Economy D.TourismElon Musk has expressed his company – Neuralink is close to announcing the first brain-machine interface (接口) to connect humans and computers. Musk told followers in Twitter the technology would be “coming soon” –though he failed to provide details.Neuralink was set up in 2016 with the ambitious goal of developing hardware to strengthen the human brain. However, little about how this will work has been made public. Neuralink describes the interface as an extremely high-speed connection between the human brain and computers.Musk has frequently claimed the rapid rise of artificial intelligence poses an existential risk to humanity. Such an interface, he says, is essential if humans are to compete with such technology in the future. At a technology conference in 2016, Mr Musk said humans risked being treated like house pets by AI machines if a brain-computer interface was not built. Last year on the Joe Rogan Experience podcast, Musk said Neuralink’s technolo gy would allow humans to “effectively combine with AI”.A paper published in Nature Nanotechnology in 2015 described a concept for this connection, explaining how a flexible circuit (回路) could be injected into a living brain. “We’re trying to lessen the di stinction between electronic circuits and neural circuits,” said Harvard researcher Charles Lieber, who co-authored the study. Despite the technology’s potential to increase the human brain, experts have warned that brain-computer interfaces risk being controlled by vicious (恶意的) artificial intelligence.Such an action could lead to AI controlling the thoughts, decisions and emotions of a person using abrain-computer link. “Technological developments mean that we are on a path to a world in which it will b e possible to discover people’s mental processes and directly operate the brain mechanisms underlying their intentions, emotions and decision,” stated a Nature comment piece written by 27 scientists and machine intelligence engineers. “The possible medical and social benefits in it are vast. But we must guide their development in a way that respects, protects and enables what is best in humanity.”12.What message did Musk convey about his Neuralink?A.It sells brain-machine interfaces.B.It offers rich data about interfaces.C.It has followers to connect humans and computers.D.Its new technology will be accessible to the public soon .13.What can we know from Paragraph Two?A.Neuralink aims to know the human brain better.B.How the hardware functions is already known.C.The brain-machine interface was invented in 2016.D.The interface is expected to link the human brain and computers rapidly.14.According to Musk, why are brain-machine interfaces important?A.Because they may treat human like house pets.B.Because they may make AI serve human better.C.Because they build neural circuits in human brains.D.Because they rapidly develop artificial intelligence.15.What is the attitude of Nature to brain-machine interfaces?A.Objective B.FavorableC.Opposed D.Indifferent二、七选五(每题2.5分,共12.5分)Winter is connected with fun and games: snowball fights, skiing, and, every four years, the Winter Olympics. But what will a winter sports enthusiast do if the snow doesn’t make an appearance? ____16____ Artificial snow is more like a tightly packed frozen snow that is partly melt. ____17____ They are broken up by a high-pressure pump at first and then turn into small frozen pieces. Most artificial snow is made using snowcannons. As the air’s cooling capacity falls, so doe s the amount of water that can be pumped through the machine. ____18____ At -4℃ a snow cannon can operate at around 80% humidity. But if the outside temperature is -1℃, this must be reduced to around 30% humidity.In 1980, the Olympics held in America became the first Winter Games to use machine-made snow.____19____ Artificial snow also appeared at the two recent Winter Olympics, in Sochi, Russia (2014), and Vancouver, British Columbia (2010). And the 2022 Winter Olympics in Beijing is the first to rely entirely on artificial snow.____20____ The International Olympic Committee states that it creates a more consistent surface. In addition, the snow that comes from a cannon is icier than natural snow. It melts more slowly, and provides a harder surface for athletes looking for speed. The first Olympics using entirely artificial snow will probably not be the last. A.But they weren’t the last.B.It is made from waterdrops.C.That’s when artificial snow comes in.D.What is artificial snow, and how is it made?E.Temperature also plays a significant role in snowmaking.F.Artificial snow can be applied into a wide range of fields.G.Artificial snow is well worth using in the Winter Olympics.四、用单词的适当形式完成短文(每题1.5分,共15分)阅读下面材料, 在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
湖北省武汉市华中科技大学附属中学2022-2023学年高二(上)数学周测(8)
湖北省武汉市华中科技大学附属中学2022-2023学年高二(上)数学周测(8)一、选择题:本题共8小题,每小题5分,共40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. 如图所示,直线l 1、l 2、l 3的斜率分别为k 1、k 2、k 3,则A .k 1<k 2<k 3B .k 1<k 3<k 2C .k 3<k 2<k 1D .k 3<k 1<k 22.某调查机构对某高科技行业进行调查统计,得到该行业从业者的学历分布扇形图以及从事该行业岗位的人数分布条形图,如图所示.给出下列三种说法:①该高科技行业从业人员中学历为博士的占一半以上;①该高科技行业中从事技术岗位的人数超过总人数的30%;①该高科技行业中从事运营岗位的人员主要是本科生.其中正确说法的个数为A. 0B. 1C. 2D. 33.如图所示,已知三棱锥O ABC ,点M ,N 分别为AB ,OC 的中点,且,,OA a OB b OC c ===,用,,a b c 表示MN ,则MN 等于A .()12c a b --B .()12a b c ++ C .()12a b c -+ D .()12b c a +- 4. 已知直线02534:=+-y x l ,直线023:=-y ax m 与直线l 平行,则直线l 与m 之间的距离为 A .85B .2C .5D .45. 甲、乙两人独立地破译一份密码,已知两人能破译的概率分别是31,41,则 A. 两人都成功破译的概率为127 B. 两人都成功破译的概率为125 C. 密码被成功破译的概率为127 D. 密码被成功破译的概率为216.在直三棱柱ABC A B C '''-中,侧棱长为2,底面是边长为2的正三角形,则异面直线AB '与BC '所成角的余弦值为A .14 B .33 C .12D .557. 如图所示,“嫦娥五号”月球探测器飞行到月球附近时,首先在以月球球心F 为圆心的圆形轨道①上绕月球飞行,然后在P 点处变轨进入以F 为一个焦点的椭圆轨道①绕月球飞行,最后在Q 点处变轨进入以F 为圆心的圆形轨道①绕月球飞行,设圆形轨道①的半径为R ,圆形轨道①的半径为r ,则下列结论中不正确的是A. 轨道①的焦距为R r -B. 若R 不变,r 越大,轨道①的短轴长越小C.轨道①的长轴长为R r +D. 若r 不变,R 越大,轨道①的离心率越大 8. 设集合}4),({2x y y x M -==,})4()3(),({222r y x y x N =-+-=(0>r ).若N M 中有且只有一个元素,则r 所有取值组成的集合为A .}41,17{B .}4117{≤<r r C .}3{}4117{ ≤<r r D .}3{}4117{ ≤≤r r二、选择题:本题共4小题,每小题5分,共20分。
四川省遂宁中学2022-2023学年高二下学期周考测试政治试题(三)
遂宁中学高2024届高二下期周考(三)政治试题一、单选题(共48分)1.“检验真理的标准只能是社会实践,理论与实践的统一是马克思主义最基本的原则,任何理论都需要不断接受实践的检验。
”我国42年前一场关于真理标准问题的大讨论,揭开了改革开放的序幕,具有划时代意义。
“实践是检验真理的唯一标准”是因为①实践是客观见之于主观的物质性活动②实践具有把主观认识和客观事物联系起来加以对照的特点③真理具有反复性、无限性和上升性④真理是标志主观同客观相符合的范畴A.①②B.①③C.②④D.③④2.获诺贝尔奖以来,屠呦呦团队在深入研究中发现,双氢青蒿素对红斑狼疮有独特效果。
根据现有临床试验,青蒿素对盘状红斑狼疮的有效率超90%、对系统性红斑狼疮有效率超80%。
研究人员还证明了青蒿素在治疗肿瘤、白血病、类风湿性关节炎、多发性硬化、变态反应性疾病等方面也有一些效果。
这表明A.尊重客观规律,能把“不可能”转变成“可能”B.尊重客观规律与发挥人的主观能动性相互作用、相互制约C.规律的客观性要求人们必须按客观规律办事D.发挥主观能动性有助于我们正确认识和利用规律3.回溯地球上的气候变迁历史,我国自主研制的超级计算机“天河二号”可以模拟到5000年前甚至更远,从而大大提高天气预报的准确率。
从哲学看,这一成果佐证了A.客观世界具有物质统一性B.思维和存在具有同一性C.意识对物质有依赖性D.人类认识有限世界的可能性4.今年是阿波罗登月51周年,人类正是以月球为起点,前往更远的星球探索。
阿波罗登月对促进科学发展、推动技术进步等起到了巨大作用,将永载人类史册。
这佐证了()A.运动是物质的唯一特性B.人类能创造并利用规律C.实践是认识的根本任务D.实践是认识发展的动力5.在中央美院最近举行的一场画展上,人工智能“微软小冰”一次创造了7个人工智能画家,这些画家能将人生背景与情感贯穿在生成的每一幅作品中,使观众能通过作品进入创作者的“人生”。
2024-2025学年上海华二附中高二上学期数学周测试卷及答案(2024.09)
1华二附中2024学年第一学期高二年级数学测试2024.09一、填空题(本大题共有12题,满分54分,第1-6题每题4分,第7-12题每题5分) 1.直线l 上存在两点在平面α上,则l α(填一符号). 2.函数324y sin x π⎛⎫=+ ⎪⎝⎭的圆频率是 .3.已知{}n a 是等差数列,若75230a a −−=,则9a 的值是 .4.两条异面直线所成角的取值范围是 .5.已知复数z a i =−的实部与虚部相等,则z i −= .6.函数213y tan x π⎛⎫=−+ ⎪⎝⎭的对称中心是 .7.三个互不重合的平面能把空间分成 . 8.数列{}n a 满足1111,12n n a a a +==−,则2024a = . 9.在ABC ∆中,::5:7:8sinA sinB sinC =,则该三角形外接圆与内切圆的面积之比是 . 10.如图,摩天轮的半径为50m,圆心O 距地面的高度为60m.已知摩天轮按逆时针方向匀速转动,每15min 转动一圈.游客在摩天轮的舱位转到距离地面最近的位置进舱.则游客进舱5min 时他距离地面的高度为 m.11.已知ABC ∆中,过中线AD 的中点E 任作一条直线分别交边,AB AC 于,M N 两点,设,(0,0)AM x AB AN yAC x y ==>>,则4x y +的最小值为 .12.对任意0,4π⎡⎤ϕ∈⎢⎥⎣⎦,函数()()f x sin x =ω+ϕ在区间2,π⎡⎤π⎢⎥⎣⎦上单调递增,则实数ω的取值范围是 .2二、选择题(本大题共有4题,满分18分,第13,14题每题4分,第15,16题每题5分) 13.设扇形的圆心角为α,半径为r ,弧长为l ,而积为S,周长为L ,则下列说法不正确的 是( ).A.若,r α确定,则,L S 唯一确定B.若,l α确定,则L S 唯一确定C.若,S L 确定,则,r α唯一确定D.若,1S 确定,则,r α唯一确定14.过正方体1111ABCD A B C D −的顶点A 作直线l ,使l 与棱1,,AB AD AA 所成的角都相等,这样的直线l 可以作( ).A.1条B.2条C.3条D.4条15.数列{}{},n n a b 满足21,32n n n a b a n n ⋅==++,则{}n b 的前10项之和等于( ). A.13 B.512 C.12 D.712 16.如图所示,角02x ,π⎛⎫∈ ⎪⎝⎭的终边与单位圆O 交于点(),10,P A ,PM x ⊥轴,AQ x ⊥轴,M 在x 轴上,Q 在角x 的终边上.由正弦函数、正切函数定义可知,sin ,tan x x 的值别等于线段,MP AQ 的长,且ΔOAP ΔOAQ OAP S S S <<扇形,则下列结论不正确的是( ). A.函数y tanx sinx x =++在22,ππ⎛⎫− ⎪⎝⎭内有1个零点B.函数y tanx x =−在32222,,ππππ⎛⎫⎛⎫−⋃ ⎪ ⎪⎝⎭⎝⎭内有2个零点C.函数y sinx x =−有3个零点D.函数y tanx sinx tanx sinx =+−−在22,ππ⎛⎫− ⎪⎝⎭内有13三、解答题(本大题满分78分)本大题共有5题, 17.(本题满分14分,第1小题6分,第2小题8分) 已知3,052sin ,π⎛⎫α=α∈ ⎪⎝⎭. (1)求23sin π⎛⎫α+ ⎪⎝⎭的值;(2)在平面直角坐标系xOy 中,以Ox 为始边,已知角β的终边与角α的终边关于y 轴对称,求()cos α+β的值.18.(本题满分14分,第1小题6分,第2小题8分)如图所示,在长方体1111ABCD A B C D −中,2AB BC ==,14,AA P =为线段11B D 上一点. (1)求证:AC BP ⊥;(2)当P 为线段11B D 的中点时,求点A 到平面PBC 的距离.419.(本题满分14分,第1小题6分,第2小题8分)在直角梯形ABCD 中,//,90,224AB CD DAB AB AD DC ∠====,点F 是BC 边上的中点. (1)若点E 满足2DE EC =,且EF AB AD =λ+μ,求λ+μ的值; (2)若点P 是线段AF 上的动点(含端点),求AP DP ⋅的取值范围.20.(本题满分18分,第1小题4分,第2小题6分,第3小题8分) 如图,正方体的棱长为1,''B C BC O ⋂=,求: (1)AO 与''A C 所成角的度数; (2)AO 与平面ABCD 所成角的正切值; (3)B OA C −−的度数.521.(本题满分18分,第1小题4分,第2小题6分,第3小题8分) 若有穷数列{}n a 满足:10ni i a ==∑且11ni i a ==∑,则称其为"n 阶01−数列".(1)若"6穷01−数列"为等比数列,写出该数列的各项;(2)若某"21k +阶01−数列"为等差数列,求该数列的通项(121n a n k ≤≤+,用,n k 表示); (3)记"n 阶01−数列"{}n a 的前k 项和为()123k S k ,,,,n =,若存在{}123m ,,,,n ∈,使12m S =,试问:数列{}()123i S i ,,,,n =能否为"n 阶01−数列"?若能,求出所有这样的数列{}n a ;若不能,请说明理由.6参考答案一、填空题1.⊂;2.2;3.3;4.0,2π⎛⎤⎥⎝⎦;5. 6.,1,46k k Z ππ⎛⎫+∈ ⎪⎝⎭; 7.4678或或或; 8.2; 9.499; 10.85; 11.94 12.13042,⎛⎤⎧⎫⋃−⎨⎬ ⎥⎝⎦⎩⎭11.已知ABC ∆中,过中线AD 的中点E 任作一条直线分别交边,AB AC 于,M N 两点,设,(0,0)AM x AB AN yAC x y ==>>,则4x y +的最小值为 . 【答案】94 【解析】()12AD AB AC =+,且E 为AD 的中点,()1124AE AD AB AC ∴==+,11,,(0,0),AM x AB AN y AC x y AB AM AC AN x y==>>∴==,,,M E N 三点共线,11144x y∴+=, ()1111944111444444y x x y x y x y x y ⎛⎫∴+=++=+++++= ⎪⎝⎭…故答案为:94 12.对任意0,4π⎡⎤ϕ∈⎢⎥⎣⎦,函数()()f x sin x =ω+ϕ在区间2,π⎡⎤π⎢⎥⎣⎦上单调递增,则实数ω的取值范围是 . 【答案】13042,⎛⎤⎧⎫⋃−⎨⎬ ⎥⎝⎦⎩⎭【解析】对任意0,4π⎡⎤ϕ∈⎢⎥⎣⎦,函数()()f x sin x =ω+ϕ在区间2,π⎡⎤π⎢⎥⎣⎦上单调递增,12,222ππ∴⨯π−∴ωω厔 ①0ω>时,此时,()02,y sin x <ω=ω+ϕ…单调递增,可得222,22k k Z k ππω+ϕ≥−+π∈ππω+ϕ≤π⎧⎪⎪⎨⎪⎩+⎪,则22222k k ⎧⎪⎪⎨⎪⎪ππϕ≥π−−ωπϕ≤+−ω⎩ππ71120,,24441kk ⎧ω≤−+π⎪⎡⎤ϕ∈∴⎨⎢⎥⎣⎦⎪ω≥−⎩当0k =时,可得104<ω≤; ②0ω<时,此时,20−ω<…,()y sin x =ω+ϕ单调递增, 即()y sin x =−−ω−ϕ在区间2,π⎡⎤π⎢⎥⎣⎦上单调递减;可得222322,k k Z k ππ−ω−ϕ≥+ππ−πω−ϕ≤π⎧⎪⎪∈⎨⎪+⎪⎩,则222322k k ⎧⎪⎪⎨⎪⎪ππϕ≤−π−ω−πϕ≥π−πω⎩−− 14120,,3422k k ⎧ω≤−−−⎪π⎪⎡⎤ϕ∈∴⎨⎢⎥⎣⎦⎪ω≥−−⎪⎩当0k =时,可得32ω=−; 综上,则实数ω的取值范围是13042,⎛⎤⎧⎫⋃−⎨⎬ ⎥⎝⎦⎩⎭.二、选择题13.C 14.D 15.B 16.C15.数列{}{},n n a b 满足21,32n n n a b a n n ⋅==++,则{}n b 的前10项之和等于( ). A.13 B.512 C.12D.712 【答案】B【解析】由题意得()()12,n a n n =++()()11112112n n b a n n n n ===−++++1210b b b ∴++⋯⋯+11111123341112=−+−+⋯⋯+−11521212=−= 综上所述,答案选择:B16.如图所示,角02x ,π⎛⎫∈ ⎪⎝⎭的终边与单位圆O 交于点(),10,P A ,PM x ⊥轴,AQ x ⊥轴,M 在x 轴上,Q 在角x 的终边上.由正弦函数、正切函数定义可知,sin ,tan x x 的值别等于线段,MP AQ 的长,且ΔOAP ΔOAQ OAP S S S <<扇形,则下列结论不正确的是( ).8A.函数y tanx sinx x =++在22,ππ⎛⎫− ⎪⎝⎭内有1个零点B.函数y tanx x =−在32222,,ππππ⎛⎫⎛⎫−⋃ ⎪ ⎪⎝⎭⎝⎭内有2个零点C.函数y sinx x =−有3个零点D.函数y tanx sinx tanx sinx =+−−在22,ππ⎛⎫− ⎪⎝⎭内有1【答案】C【解析】对于选项A ,函数()g x y tanx sinx x ==++在22,ππ⎛⎫− ⎪⎝⎭为增函数,又()00g =,即函数y tanx sinx x =++在22,ππ⎛⎫− ⎪⎝⎭内有1个零点,即选项A 正确;对于选项B ,函数()f x y tanx x ==−,则()21'1f x cos x =−,则函数在3,2222,,ππππ⎛⎫⎛⎫− ⎪ ⎪⎝⎭⎝⎭为减函数,又()3300,0,042f f f ππ⎛⎫⎛⎫=<> ⎪ ⎪⎝⎭⎝⎭,即函数在3,2222,,ππππ⎛⎫⎛⎫− ⎪ ⎪⎝⎭⎝⎭各有一个零点, 即函数y tanx x =−在32222,,ππππ⎛⎫⎛⎫−⋃ ⎪ ⎪⎝⎭⎝⎭内有2个零点,即选项B 正确;对于选项C ,因为y sinx x =−,则'10y cosx =−…,即函数为减函数, 又当0x =时,0y =,即函数y sinx x =−有1个零点,即选项C 错误;对于选项D,当02x ,π⎛⎫∈− ⎪⎝⎭时,sin tanx x <,即2y tanx =,显然无零点,当02x ,π⎛⎫∈ ⎪⎝⎭时,sin tanx x >,即2y sinx =,显然无零点,又当0x =时,0y =,即函数y tanx sinx tanx sinx =+−−在22,ππ⎛⎫− ⎪⎝⎭内有1个零点,即选项D 正确,故选C三.解答题 17.(1)(2)1− 18.(1)证明略(219.(1)112− (2)1,810⎡⎤−⎢⎥⎣⎦20.(本题满分18分,第1小题4分,第2小题6分,第3小题8分)9如图,正方体的棱长为1,''B C BC O ⋂=,求: (1)AO 与''A C 所成角的度数; (2)AO 与平面ABCD 所成角的正切值; (3)B OA C −−的度数.【答案】(1)30(2(3)90 【解析】(1)连接'AB ,则由正方体性质,可得''AB AC B C ====且O 为'B C 的中点,所以1'2OC B C ==AO OC ⊥,所以12OC sin OAC AC ∠===,故30OAC ∠=,又由正方体性质可知'//'AA CC 且''AA CC =,所以四边形''AA C C 是平行四边形, 所以//''AC A C 所以OAC ∠是AO 与''A C 所成角,故AO 与''A C 所成角的度数为30; (2)如图,在平面''BCC B 内作OE BC ⊥交BC 于点E ,连接AE , 由正方体性质可知平面''BCC B ⊥平面ABCD ,又平面''BCC B ⋂平面,ABCD BC OE =⊂平面''BCC B ,所以OE ⊥平面ABCD , 所以E 为BC 中点,AE 为AO 在平面ABCD 上的射影, 所以OAE ∠为OA 与平面ABCD 所成的角, 由题意,在Rt OAE ∆中,12OE BE ==,AE ==所以1OEtan OAEAE∠===所以AO与平面ABCD;(3)由(1)知AO OC⊥,又由正方体性质可知AB⊥平面''BB C C,而OC⊂平面''BB C C,所以AB OC⊥,又,,AO AB A AO AB⋂=⊂平面ABO,所以OC⊥平面ABO,又OC⊂平面AOC,所以平面ABO⊥平面AOC,所以B OA C−−的度数为90.21.(本题满分18分,第1小题4分,第2小题6分,第3小题8分)若有穷数列{}n a满足:10niia==∑且11niia==∑,则称其为"n阶01−数列".(1)若"6穷01−数列"为等比数列,写出该数列的各项;(2)若某"21k+阶01−数列"为等差数列,求该数列的通项(121na n k≤≤+,用,n k表示);(3)记"n阶01−数列"{}n a的前k项和为()123kS k,,,,n=,若存在{}123m,,,,n∈,使12mS=,试问:数列{}()123iS i,,,,n=能否为"n阶01−数列"?若能,求出所有这样的数列{}na;若不能,请说明理由.【答案】(1)111111,,,,,666666−−−或1111111,,,,,666666−−−;(2)当0d>时,()()*1211nna n N,n kk k k∴=−∈≤++当0d<时,()()*1211nna n N,n kk k k=−+∈≤++(3)数列{}()123iS i,,,,n=不为"n阶01−数列".【解析】(1)设123456,,,,,a a a a a a成公比为q的等比数列,显然1q≠,则有123456a a a a a a+++++=,得()6111a qq−=−,解得1q=−,由1234561a a a a a a+++++=,得161a=,解得116a=±,1011所以数列为111111,,,,,666666−−−或1111111,,,,,666666−−−;(2)设等差数列()12321,,,,1k a a a a k +…的公差为d ,123210,k a a a a +++++=()()11221210,0,2k k dk a a kd +∴++=+=即120,,k k a a d ++=∴=当0d =时,矛盾, 当0d >时,(23211212k k k a a a a a ++++++==−++)k a +()1122k k kd d −∴+=,即()11d k k =+, 由()11100,1k a a k k k +=+⋅=+得即11,1a k =−+ ()()()111111n na n k k k k k ∴=−+−⋅=+++()*121n N ,n k k−∈≤+ 当0d <时,同理可得()1122k k kd d −+=−,即()11d k k =−+由10k a +=得()1101a k k k −⋅=+,即111a k =+ ()()()111111n na n k k k k k ∴=−−⋅=−+++()*121n N ,n k k+∈≤+ 综上所述,当0d >时,()()*1211n n a n N ,n k k k k∴=−∈≤++当0d <时,()()*1211n n a n N ,n k k k k=−+∈≤++(3)记12,,,n a a a 中非负项和为A ,负项和为B ,则0,1A B A B +=−=,得1111,,2222k A B B S A ==−−=≤≤=,即()11232k S k ,,,,n ≤=,若存在{}123m ,,,,n ∈,使12m S =,可知:1210,0,,0,0m m a a a a +厖厔21210,,0,,2m n m m n a a a a a ++++++=−且剟1,0,0;k k k m a S ∴时剟厖 1,0,0k k n m k n a S S +<=时剟?123123n n S S S S S S S S ∴++++=++++12又1230n S S S S ++++=与1231n S S S S ++++=不能同时成立数列{}()123i S i ,,,,n =不为"n 阶01−数列".。
辉南县第六中学2022-2023学年高二下学期周测(六)政治试卷
高二政治下学期第六次周测一、选择题(每小题3分,共75分)1.下列社会关系中属于民事法律关系的是①买卖关系②师生关系③借贷关系④税收关系A.①②B.①③C.②④D.①④2.双11过后,杨女士接到多个推销商品的电话和短信,原来是某快递公司的收派员和仓库管理员小张利用职务便利,从快递单中嗅出商机,将大量快递单直接出售,或以拍照的方式出售给他人,共计获利9.08万元。
小张的行为侵犯了杨女士的A.隐私权B.姓名权C.名誉权D.肖像权3.甲公司就其生产的一款S型高档轿车造型和颜色组合获得了外观设计专利权,又将其设计的“飞鹰”造型注册为汽车的立体商标,并将该造型安装在车头。
某车行因车主陈某请求,将陈某低价位旧车改装成S型高档轿车的造型和颜色,并从报废轿车上拆下“飞鹰”标志安装在改装车上。
陈某使用该改装车提供专车服务,收费高于普通轿车。
据此,判断正确的是①陈某的行为侵犯了甲公司的专利权②车行的行为侵犯了甲公司的专利权③陈某的行为侵犯了甲公司的商标权④车行的行为未侵犯甲公司的商标权A.①③B.②③C.①④D.②④4.作家钱某创作完成《青春》剧本,电影制片人孙某经钱某允许将该剧本拍成同名电影。
未经钱某、孙某同意,网络商赵某根据该电影制作网络剧在网络上传播,出版商顾某出版发行了《青春》电影的影碟出售。
下列对赵某、顾某的侵权行为认识正确的是①顾某侵犯了孙某的复制、发行权②起某侵犯了孙某的改编权③赵某侵犯了钱某的改编、发行权④顾某侵犯了钱某的放映权A.①②B.②③C.③④D.①④5.在疫情防控期间,浙江省很多企业为职工提供必要的防护用品和保障设施,确保职工身体健康和工作场所安全,落实职工隔离期和医疗期的工资待遇。
企业采取这些措施,意在①协调劳动关系,维护劳动者的权益②承担社会责任,塑造良好形象③完善社会保障制度,恢复生产能力④推进复工复产,增加就业岗位A.①②B.①④C.②③D.③④6.关于全面履行原则,下列说法中正确的是①又称正确履行原则②也叫适当履行原则③它要求当事人必须按照合同约定的要求正确行使自己的合同权利④只有合同得到全面履行,合同的订立才有意义A.①②③B.①②④C.①③④D.①②③7.下列行为构成侵犯知识产权的是A.小王把李某的一首诗配上音乐背景供自己和朋友欣赏B.王老师把李某的诗作为范文在课堂讲授C.某报刊转载其他报刊上发表的作品D.张某把李某的诗稍作修改署上自己的姓名发表在当地一家报纸上8.小猛与小丽登记结婚后不久由于夫妻矛盾重重提出离婚。
海南热带海洋学院附属中学2022-2023学年高二上学期九月第二次英语周测试题
海南热带海洋学院附属中学2022-2023学年高二年级第一学期九月第二次周测试题第一部分完形填空(共20小题;每小题2分,满40分)阅读下面的短文,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。
My husband used to be a workaholic(工作狂) . Nothing seemed to be more __1__to him than his work, not even his family.He usually 2 at 6 o’clock, and our 3 and I were still asleep then, and then left 4 having breakfast, I asked him to have breakfast 5, but he said it’s a waste of 6. I didn’t know what kept him so 7. He even couldn’t finish all his work in the office. He came back at ten at night. However, I never expected that he would give me a kiss. 8 he got home, he would start to 9 . The kids had already been in bed, of course.“Mom, where is Dad? Why I 10 see him?” the kids often asked.“Well, Dad has to work, He is busy,” I always 11 like this. As time went by, they didn’t ask where their dad was again. Perhaps they had 12 that they had a dad. However, the situation changed several months ago.Jenny, our daughter, suddenly became 13 . I sent her to the hospital. The 14 told me that she was seriously ill and that she was calling 1 5 all the time. Tears burst into my eyes when I 16 that. I finally called my 17 and told him about that. Half an hour later, he came to the hospital and held Jenny’s little hands.He 18 another job two weeks later.“I Just wanted to make as much 19 as possible for you and our kids. But now, I just want to 20 as much time as possible with you and the kids,” he said and that’s what he is doing now.1. A. possible B. interesting C. important D. relaxing2. A. sat down B. got up C. stoop up D. came up3. A. kids B. pets C. neighbors D. parents4. A. on B. with C. without D. after5. A. in the office B. on the way C. in school D. at home6. A. money B. time C. energy D. food6. A. tired B. busy C. fast D. excited8. A. As soon as B. In the end C. Long before D. Long after9. A. eat B. sleep C. work D. write10. A. often B. never C. sometimes D. cheated11. A. shouted B. asked C. replied D. cheated12. A. thought B. forgotten C. ignored D. minded13. A. fine B. worse C. ill D. angry14. A. teacher B. boss C. officer D. doctor15. A. mom B. sir C. dad D. madam16. A. noticed B. realized C. heard D. felt17. A. mother B. child C. brother D. husband18. A. received B. lost C. changed D. found19. A. money B. happiness C. value D. laughter20. A. spend B. make C. set D. steal第二部分(共20小题,每小题2分,满分40分)第一节阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项(共15小题;每小题2分,满分30分)(A)Valencia is in the east part of Spain(西班牙). It has a port on the sea, two miles away on the coast. It is the capital of a province that is also named Valencia.The city is a market centre for what is produced by the land around the city. Mo st of the city’s money is made from farming. It is also a busy business city, with ships, railways, clothes and machine factories.Valencia has an old part with white buildings, colored roofs, and narrow streets. The modern part has long, wide streets and new buildings. Valencia is well known for its parks and gardens. It has many old churches and museums. The University in the centre of the city was built in the 13th century.The city of Valencia has been known since the 2nd century. In the 8th century it was the capital of Spain. There is also an important city in Venezuela(委内瑞拉)named Valencia.21. From the text, how many places has the name Valencia?.A. One.B. Two.C. Three.D. Four.22. What is the main difference between the two parts of the city?.A. The color of the buildings.B. The length of the streets.C. The age of the buildings.D. The color of the roofs.23. When was Valencia the most important city in Spain?.A. 2nd century.B. 8th century .C. 13th century.D. 20th century.24.What is Valencia famous for?.A. Its seaport.B. Its University.C. Its churches and museums.D. Its parks and gardens25. The main income of the city of Valencia is from its.A. markets.B. business.C. factories.D. farming.(B)Sam and Joe were astronauts. There was once a very dangerous trip and the more experienced astronauts knew there was only a small chance of coming back alive (活着). Sam and Joe, however, thought it would be exciting though a little dangerous. “We’re the best men for the job,” they said tothe boss. “There may be problems, but we can find the answers.” “They’re the last people I’d trust,” thought the boss. “But all the other astronauts have refused to go.”Once they were in space, Joe had to go outside to make some repairs. When the repairs were done, he tried to get back inside the spaceship. But the door was locked. He knocked but there was no answer. He knocked again, louder this time, and again no answer came. Then he hit the door as hard as he could and finally a voice said, “Who’s there?” “It’s me! Who else could it be?” shouted Joe. Sam let him in all right but you can imagine that Joe never asked to go on a trip with Sam again!26. Most of the astronauts were unwilling to go on the trip because.A. there was little chance of being selectedB. they weren’t experienced enoughC. they thought they might get killedD. it wasn’t exciting enough27.Why were Sam and Joe chosen?A.The boss wanted them to get more experience.B.The boss trusted them more than anyone else.C.They were the last people who wanted to go.D.They were the only men who offered to go.28.What did Sam and Joe think the trip would be like?A. There would be serious problems.B. There wouldn’t be any danger.C. It would be long and tiring.D. It would be exciting.29.Joe didn’t want to work with Sam again probably because he thought Sam.A. was very slow and possibly deafB. didn’t know how to operate the doorC. was less experienced than he wasD. didn’t know how to do repairs30.The writer tells this story to .A.show the dangerous side of the astronauts’lifeB.show the funny side of the astronauts’lifeC.make people laughD.make people think(C)One Sunday, Mark decided to go sailing in his boat with his friend Dan, but Dan happened to be away. Dan’s brother John offered to go instead though he did not know anything about sailing. Mark agreed and they set out to sea.Soon they found themselves in a thick fog. Mark was sure they would be hit by a big ship.Fortunately he saw a large buoy(浮标)through the fog and decided to tie the boat to it for safety.As he was getting onto the buoy, however, he dropped the wet rope. The boat moved away in the fog carrying John, who did not know how to use the radio. He drifted(漂流)about and was not seen until twelve hours later.Mark spent the night on the buoy. In the early morning he fell asleep. He was having a bad dream when a shout woke him up. A ship, the Good Hope, came up and he climbed onto it and thanked the captain. The captain told him that John had been picked up by another ship and the ship’s captain had sent out a message. “Without the message I would not have found you on the buoy,” he said.31.Why didn’t Mark and Dan go sailing together?A. Dan asked his brother to go instead.B. Dan was in some other place.C. Mark was in some other place.D. Mark would like to go with John.32. Mark tried to tie the boat to the buoy so that.A. he could spend the night on it while John was looking for helpB. he and John could go sailing again when the fog clearedC. it wouldn’t be hit by other shipsD. he might be picked up by a passing ship33. John and Mark became separated because.A. there wasn’t room for both John and Mark on the buoyB. John couldn’t control the boat and it drifted awayC. Mark thought it safe to stay on the buoy but John didn’tD. John had to stay in the boat to radio for help34. What made it possible for Mark to be found on the buoy?A. John told people where to look for him.B. John radioed to the Good Hope to get him.C. He shouted when he caught sight of the Good Hope.D. The captain saw him as the fog cleared.35. The word he in the last sentence refers to .A. the captain that got the messageB. the captain that sent the messageC. JohnD. Mark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。
高二数学周测卷 (3)
第6题图 2020至2021学年高二(上)数学周测试卷 姓名 学号 班级 一、选择题 1.在平面ABCD 中,A (0,1,1),B (1,2,1),C (-1,0,-1),若向量a =(x ,y ,z ),且向量a 为平面ABC 的法向量,则y 2等于( )A .2B .0C .1D .32.已知平面α的一个法向量n =(-2,-2,1),点A (-1,3,0)在α内,则点P (-2,1,4)到α的距离为( )A .10B .3 C.83 D. 1033.若点A (2,3,2)关于Ozx 平面的对称点为A ′,点B (-2,1,4)关于y 轴的对称点为B ′,点M 为线段A ′B ′的中点,则|MA |等于( )A.30 B .3 6 C .5 D.214.圆x 2+y 2=4上的点到直线4x -3y +25=0的距离的取值范围是( )A .[3,7]B .[1,9]C .[0,5]D .[0,3]5.已知圆C 1:x 2+y 2-2mx +m 2=4,圆C 2:x 2+y 2+2x -2my =8-m 2(m >3),则两圆的位置关系是( )A .相交B .内切C .外切D .外离6.如图所示,F 1,F 2分别为椭圆x 2a 2+y 2b2=1的左、右焦点,点P 在椭圆上,△POF 2是面积为3的正三角形,则b 2的值为( )A. 3 B .2 3 C .3 3 D .437.若椭圆的焦距与短轴长相等,则此椭圆的离心率为( )A.15B.55C.12D.228.若椭圆x 2a 2+y 2b2=1(a >b >0)的左、右焦点分别为F 1,F 2,线段F 1F 2被点⎝⎛⎭⎫b 2,0分成5∶3的两段,则此椭圆的离心率为( )A.1617B.41717C.45D.2559.已知双曲线C :x 2a 2-y 2b2=1(a >0,b >0)的离心率为2,焦点到渐近线的距离为3,则双曲线C 的实轴长为( )A. 3 B .3 C .2 3 D .610.已知直线l :(a +1)x +ay +a =0(a ∈R )与圆C :x 2+y 2-4x -5=0,则下列结论正确的是( )A .存在a ,使得l 的倾斜角为90°B .存在a ,使得l 的倾斜角为135°C .存在a ,使直线l 与圆C 相离D .对任意的a ,直线l 与圆C 相交,且a =1时相交弦最短二、填空题11.已知a >b >0,椭圆C 1的方程为x 2a 2+y 2b 2=1,双曲线C 2的方程为x 2a 2-y 2b 2=1,C 1与C 2的离心率之积为32,则C 2的渐近线方程为________. 12.设F 1,F 2是双曲线C :x 2a 2-y 2b2=1(a >0,b >0)的两个焦点,P 是C 上一点.若|PF 1|+|PF 2|=6a ,且△PF 1F 2的最小内角为30°,则C 的离心率为________.13.已知双曲线x 2m -y 2m +6=1(m >0)的虚轴长是实轴长的2倍,则双曲线的标准方程为________. 14.若椭圆x 2a 2+y 2b 2=1(a >b >0)的离心率为14,则双曲线x 2a 2-y 2b2=1的渐近线方程为________. 三、解答题15.已知椭圆x 2a 2+y 2b 2=1(a >b >0)经过点A (2,1),离心率为22,过点B (3,0)的直线l 与椭圆交于不同的两点M ,N .(1)求椭圆的方程;(2)若|MN |=322,求直线MN 的方程.16.已知双曲线过点(3,-2),且与椭圆4x 2+9y 2=36有相同的焦点.(1)求双曲线的标准方程;(2)若点M 在双曲线上,F 1,F 2为左、右焦点,且|MF 1|+|MF 2|=63,试判断△MF 1F 2的形状.。
2022-2023学年高二下学期周考卷D(原卷版)
2022-2023学年高二下学期周考卷D考试时间75分钟满分100分一、单选题(每小题2分,共24分。
在每小题给出的四个选项中,只有一项符合题目要求)1.(2022春·广东佛山·高二统考期末)诗句“也是人间玉,无非香不同。
初闻封鼻孔,细品引馋虫。
”描述的正是腐乳——我国古代劳动人民创造出的一种经过微生物发酵制作的大豆食品。
下列叙述错误的是()A.制作腐乳前需要对各种用具进行清洁和消毒B.腐乳中的蛋白质被分解成小分子,易于人体消化吸收C.腐乳制作过程中起主要作用的微生物是曲霉D.为提高腐乳品质和产量,可利用基因工程改造和选育优良菌种2.(2022春·福建龙岩·高二统考期末)我国制作泡菜历史悠久。
家庭制作泡菜时,主要选择的是芥菜。
在发酵过程中,芥菜产生的亚硝酸盐在特定条件下会转变为致癌物——亚硝胺。
泡菜虽美味,但不宜过量食用。
下列叙述错误的是()A.在发酵过程中,乳酸菌、乳酸和亚硝酸盐的含量均会先增加后减少再趋于稳定B.在发酵初期有气泡产生,原因是微生物呼吸作用产生了CO2和坛中存在空气C.制作过程中需要用食盐,其作用是析出芥菜中的水分并抑制微生物生长D.原料应选用新鲜的芥菜,原因是新鲜的芥菜中亚硝酸盐的含量低3.(2022春·黑龙江绥化·高二校考期末)下列有关制作果酒、果醋所利用的主要微生物的说法,错误..的是()A.用到的主要微生物分别是酵母菌,醋酸菌B.从微生物的细胞结构来看,用到的主要微生物属于真核生物C.用到的主要微生物的异化作用类型依次是兼性厌氧型、需氧型D.用到的主要微生物都可以通过分裂生殖4.(2022春·四川南充·高二统考期末)用下表培养基成分培养某种微生物,下列有关说法错误的是()A.此培养基可用来培养自养型微生物B.表中的营养成分有水、无机盐和氮源C.用此培养基可直接培养出肉眼可见的菌落D.若加入蛋白胨,则它可提供碳源、氮源和维生素5.(2022春·吉林·高二校联考期末)下列有关无菌技术的叙述,错误是()A.无菌技术包括消毒和灭菌两个方面B.经巴氏消毒法可以杀死牛奶中的绝大多数微生物,基本不破坏牛奶的营养成分C.煮沸消毒法中100℃煮沸5~6min可以杀死所有微生物包括芽孢和孢子D.将接种环直接在酒精灯火焰的燃烧层充分灼烧,可以灭菌6.(2022春·青海西宁·高二校联考期末)以下关于能分解尿素的细菌的说法,正确的是() A.能分解尿素的原因是能合成蛋白酶B.用以尿素为唯一氮源且添加了酸碱缓冲剂的培养基培养该菌后不会使酚红指示剂变红C.环境中含有大量的尿素诱导该细菌产生了分解尿素的特性D.分离该种细菌时以尿素作为唯一碳源7.(2022春·湖南衡阳·高二统考期末)粗饲料经过微生物发酵后,其富含的纤维素、半纤维素和果胶等物质被降解为小分子,易于被畜禽采食和消化吸收,用于饲料发酵的益生菌包括乳酸菌和酵母菌等。
湖北省襄阳市第四中学2022-2023学年高二上学期数学周考测试题(二)
襄阳四中2021级高二数学周考测试题(二)一、单选题1、已知向量,且向量与互相垂直,则的值是()A.B. C. D.2、若平面的一个法向量分别为,,则()A. B.与相交但不垂直C.或与重合D.3、已知正四面体ABCD,M为BC中点,N为AD中点,则直线BN与直线DM所成角的余弦值为()A. B. C. D.4、如图,在长方体中,,E为CD的中点,点P在棱AA1上,且平面,则AP的长为()C.1D.与AB的长有关A. B.5、设、,向量,,且,,则()A. B. C. D.6、以下命题:①若,则存在唯一的实数,使得;②若,则或;③若{}为空间的一个基底,则构成空间的另一个基底;④一定成立.则其中真命题的个数为()A.4B.3C.2D.17、直三棱柱中,,,点是线段上的动点(不含端点),则以下各命题中正确的是()A.与不垂直B.的最小值为D.平面C.的取值范围为8、在棱长为2的正四面体ABCD中,点M满足=x+y-(x+y-1),点N满足=λ+(1-λ),当AM、BN最短时,·=()A.-B.C.-D.二、多选题9、已知,是两条不同的直线,,,是三个不同的平面.下列说法中正确的是()A.若,,,则B.若,,则C.若,,,则D.若,,,则10、如图,在三棱柱中,侧棱底面,,,是棱的中点,是的延长线与的延长线的交点.若点在直线上,则下列结论错误的是()A.当为线段的中点时,平面B.当为线段的三等分点时,平面C.在线段的延长线上,存在一点,使得平面D.不存在点,使与平面垂直11、正方体的棱长为,,,分别为,,的中点.则()A.直线与直线垂直B.直线与平面平行C.平面截正方体所得的截面面积为D.点与点到平面的距离相等12、在三维空间中,叫作向量与的外积,它是一个向量,且满足下列两个条件:①,,且,,三个向量构成右手系(如图所示);②.在正方体中,已知其表面积为S,下列结论正确的有()A. B.C. D.与共线三、填空题13、已知向量,若,则实数________.14、已知四棱柱的底面是正方形,底面边长和侧棱长均为2,,则对角线的长为________.15、如图,在三棱锥中,,平面ABC,于点E,M是AC的中点,,则的最小值为______.16、已知球是棱长为2的正八面体(八个面都是全等的等边三角形)的内切球,为球的一条直径,点为正八面体表面上的一个动点,则的取值范围是_____.四、解答题17、已知空间中三点的坐标分别为,,,且,.(1)求向量与夹角的余弦值;(2)若与-互相垂直,求实数的值.18、在中,角所对的边分别为,且满足(1)求角;(2)若外接圆的半径为,且边上的中线长为,求的面积.19、2020年新冠肺炎疫情期间,某区政府为了解本区居民对区政府防疫工作的满意度,从本区居民中随机抽取若干居民进行评分.根据调查数据制成如下表格和频率分布直方图.已知评分在的居民有人.满意度评分满意度等级不满意基本满意满意非常满意(1)求频率分布直方图中的值及所调查的总人数;(2)为了解部分居民不满意的原因,从不满意的居民中用分层抽样的方法抽取名居民,倾听他们的意见,并从人中抽取人担任防疫工作的监督员,求这人中仅有一人对防疫工作的评分在内的概率.20、如图,在底面为菱形的平行六面体中,分别在棱上,且,且.(1)用向量表示向量;(2)当为何值时,.21、如图,在三棱锥中,平面平面,,为的中点.(1)证明:;(2)若是边长为1的等边三角形,点在棱上,,且二面角的大小为,求三棱锥的体积.22.如图,在四棱锥中,底面是平行四边形,,M,N分别为的中点,.(1)证明:;(2)求直线与平面所成角的正弦值.。
河南省南阳市文礼中学2022-2023学年高二下学期第二次周考生物试卷
河南省南阳市文礼中学2022-2023学年高二下学期第二次周考试卷一.选择题(共30小题,每小题2分)1.传统发酵食品的制作在我国具有悠久的历史,下列关于制作传统泡菜的说法正确的是()A.制作泡菜利用了乳酸菌发酵产生的乳酸和CO2B.制作泡菜时加入“陈泡菜水”可以缩短发酵时间C.为保证泡菜坛内的无氧环境,腌制时应尽量将泡菜坛装满D.为防止杂菌污染,腌制时要多放盐并将盐水与食材一同煮沸2.唐代苏敬的《新修本草》云:凡作酒醴须曲,而蒲桃(即葡萄)、蜜等酒独不用曲。
下列叙述错误的是()A.装置密闭发酵过程中,酒精度的变化是先增加后趋于稳定B.“蒲桃、蜜等酒独不用曲”说明葡萄酒的酿制不需要微生物C.酿酒中期起泡现象是微生物无氧呼吸产生的CO2释放形成的D.工业发酵中为降低杂菌污染,发酵前需要对器具、原料等进行灭菌3.某同学将自然发酵的甘蔗汁加入体积分数为3%的无水乙醇中,利用高产菌株酿制甘蔗醋。
下列分析错误的是()A.醋酸菌可将甘蔗汁中的糖类和乙醇转化为醋酸B.添加高产菌株到发酵液后,应高温处理杀灭杂菌C.发酵过程需要保持通气,温度控制在30~35℃D.培养液中的醋酸浓度不再上升时即可停止发酵4.微生物培养时常用到无菌技术避免杂菌污染,相关叙述正确的是()A.无菌技术包括对操作者的衣着和手进行灭菌B.倒平板时应该把培养皿盖完全打开,以免培养基溅到培养皿盖上C.配置好的培养基应放入干热灭菌箱中进行灭菌D.接种前后接种环都必须灼烧灭菌5.下列关于分离高产脲酶菌的实验叙述,正确的是()A.分离目的菌株时以能产生脲酶的刀豆种子研磨液作为样品B.分离菌种所采用的选择培养基需添加尿素和牛肉膏蛋白胨C.利用稀释涂布平板法纯化菌种时常用菌落数作为统计结果D.实施本实验时所用平板和试管的数目不多而且耗时也不长6.精氨酸依赖型谷氨酸棒状杆菌缺乏将鸟氨酸转化为精氨酸的酶,不能在缺少精氨酸的培养基上正常生长,但可作为鸟氨酸发酵的优良菌种。
高二周测试卷及答案详解
2020至2021学年高二(上)数学周测试卷姓名 学号 班级一、选择题1.两条直线y =32x ,6x -4y +13=0之间的距离为( ) A.13 B.132 C.134D .13 答案 B解析 两条直线的方程分别为3x -2y =0,3x -2y +132=0, 所以两条直线之间的距离d =⎪⎪⎪⎪13232+22=132. 2.已知双曲线x 2-y 23=1,则离心率等于( ) A .3 B.62 C.52 D .2 答案 D解析 由双曲线方程可知c 2=4,所以e =c a=2.3.P ,Q 分别为直线3x +4y -12=0与6x +8y +5=0上任意一点,则|PQ |的最小值为( ) A.95 B.185 C.2910 D.295答案 C解析 易知直线3x +4y -12=0与6x +8y +5=0平行,故|PQ |的最小值即两平行直线间的距离,故d =⎪⎪⎪⎪52+125=2910. 4.设双曲线x 2a 2-y 29=1(a >0)的两焦点之间的距离为10,则双曲线的离心率为( ) A.35 B.45 C.54 D.53答案 C解析 因为双曲线x 2a 2-y 29=1(a >0)的两焦点之间的距离为10,所以2c =10,c =5,所以a 2=c 2-9=16,所以a =4.所以离心率e =54.5.直线2x -y -4=0与抛物线y 2=6x 交于A ,B 两点,则线段AB 的长度为( )A .8 B.2852 C.3052 D.3352 答案 B解析 联立⎩⎪⎨⎪⎧y 2=6x ,2x -y -4=0, 消去y 并整理得2x 2-11x +8=0,Δ>0,设A (x 1,y 1),B (x 2,y 2),则x 1+x 2=112,x 1x 2=4, ∴|AB |=1+k 2·(x 1+x 2)2-4x 1x 2=1+4×1214-4×4=2852. 6.边长为1的等边三角形AOB ,O 为坐标原点,AB ⊥x 轴,以O 为顶点且过A ,B 的抛物线方程是( )A .y 2=36xB .y 2=-33xC .y 2=±36xD .y 2=±33x 答案 C解析 设抛物线方程为y 2=ax (a ≠0).又A ⎝⎛⎭⎫±32,12(取点A 在x 轴上方), 则有14=±32a , 解得a =±36, 所以抛物线方程为y 2=±36x . 7.过抛物线C :y 2=12x 的焦点作直线l 交C 于A (x 1,y 1),B (x 2,y 2)两点,若x 1+x 2=6,则|AB |等于( )A .16B .12C .10D .8答案 B解析 由题意得p =6,∴|AB |=x 1+x 2+p =6+6=12.8.已知直线l 与抛物线x 2=2py (p >0)只有一个交点,则直线l 与抛物线的位置关系是( )A .相交B .相切C .相离D .相交或相切答案 D 解析 当直线l 与y 轴平行或重合时,直线l 与抛物线x 2=2py (p >0)有一个交点,此时直线l 与抛物线是相交的.当直线l 的斜率存在,直线l 与抛物线x 2=2py (p >0)只有一个交点时,直线l 与抛物线相切.9.已知双曲线C :x 29-y 216=1的左、右焦点分别为F 1,F 2,P 为双曲线C 的右支上一点,且|PF 2|=815|F 1F 2|,则△PF 1F 2的面积为( ) A.803 B.12C .2D .4 答案 A解析 ∵在双曲线C :x 29-y 216=1中,a =3,b =4,c =5, ∴F 1(-5,0),F 2(5,0),|F 1F 2|=10.∵|PF 2|=815|F 1F 2|=163, ∴|PF 1|=2a +|PF 2|=6+163=343. ∴在△PF 1F 2中,cos ∠PF 1F 2=⎝⎛⎭⎫3432+102-⎝⎛⎭⎫16322×343×10=1517, ∴sin ∠PF 1F 2=817, ∴△PF 1F 2的面积为12×343×10×817=803. 10.(多选)已知双曲线E 的中心在原点,对称轴为坐标轴,渐近线方程为y =±2x ,则双曲线E 的离心率为( ) A.52 B. 5 C.533 D.355答案 AB解析 若双曲线焦点在x 轴上,由渐近线方程为y =±2x ,得b a=2, ∴e =c a =1+⎝⎛⎭⎫b a 2=5;若双曲线焦点在y 轴上,由渐近线方程为y =±2x ,得a b =2, ∴e =c a =1+⎝⎛⎭⎫b a 2=52.二、填空题11.设抛物线y 2=4x 的焦点为F ,准线为l .则以F 为圆心,且与l 相切的圆的方程为________. 答案 (x -1)2+y 2=4解析 抛物线y 2=4x 中,2p =4,p =2,焦点F (1,0),准线l 的方程为x =-1, 以F 为圆心,且与l 相切的圆的方程为 (x -1)2+y 2=22,即(x -1)2+y 2=4.12.若直线x -y =2与抛物线y 2=4x 交于A ,B 两点,则线段AB 的中点坐标是________. 答案 (4,2)解析 由⎩⎪⎨⎪⎧x -y =2,y 2=4x , 得x 2-8x +4=0,Δ>0,设A (x 1,y 1),B (x 2,y 2),则x 1+x 2=8,y 1+y 2=x 1+x 2-4=4,故线段AB 的中点坐标为(4,2).13.直线y =kx +2与抛物线y 2=8x 有且只有一个公共点,则k =________.答案 0或1解析 当k =0时,直线与抛物线有唯一交点,当k ≠0时,联立方程消去y ,得k 2x 2+4(k -2)x +4=0,由题意Δ=16(k -2)2-16k 2=0,∴k =1.综上,k =0或1.14.过抛物线y 2=4x 的焦点作直线交抛物线于A (x 1,y 1),B (x 2,y 2)两点,若|AB |=7,则AB 的中点M 到抛物线准线的距离为________.答案 72解析 抛物线的焦点为(1,0),准线方程为x =-1,p =2.由抛物线的定义,知|AB |=|AF |+|BF |=x 1+p 2+x 2+p 2=x 1+x 2+p ,即x 1+x 2+p =7,故x 1+x 2=5.于是弦AB 的中点M 的横坐标为52,因此点M 到抛物线准线的距离为52+1=72. 三、解答题15.已知椭圆x 24+y 29=1及直线l :y =32x +m . (1)当直线l 与该椭圆有公共点时,求实数m 的取值范围;(2)求直线l 被此椭圆截得的弦长的最大值.解 (1)由⎩⎨⎧ y =32x +m ,x 24+y 29=1,消去y ,并整理得9x 2+6mx +2m 2-18=0.①Δ=36m 2-36(2m 2-18)=-36(m 2-18).因为直线l 与椭圆有公共点,所以Δ≥0,解得-32≤m ≤3 2.故所求实数m 的取值范围为[-32,32].(2)设直线l 与椭圆的交点为A (x 1,y 1),B (x 2,y 2),由①得x 1+x 2=-6m 9,x 1x 2=2m 2-189, 故|AB |=1+k 2·(x 1+x 2)2-4x 1x 2 =1+⎝⎛⎭⎫322·⎝⎛⎭⎫-6m 92-4×2m 2-189 =133·-m 2+18, 当m =0时,直线l 被椭圆截得的弦长的最大值为26.16.已知抛物线C :y 2=2px (p >0)经过点P (2,2),A ,B 是抛物线C 上异于点O 的不同的两点,其中O 为原点.(1)求抛物线C 的方程,并求其焦点坐标和准线方程;(2)若OA ⊥OB ,求△AOB 面积的最小值.解 (1)由抛物线C :y 2=2px 经过点P (2,2)知,4p =4,解得p =1.则抛物线C 的方程为y 2=2x .抛物线C 的焦点坐标为⎝⎛⎭⎫12,0,准线方程为x =-12. (2)由题意知,直线AB 不与y 轴垂直,设直线AB :x =ty +a ,由⎩⎪⎨⎪⎧x =ty +a ,y 2=2x ,消去x ,得y 2-2ty -2a =0. Δ=4t 2+8a .设A ()x 1,y 1,B ()x 2,y 2,则y 1+y 2=2t ,y 1y 2=-2a .因为OA ⊥OB ,所以x 1x 2+y 1y 2=0,即y 21y 224+y 1y 2=0, 解得y 1y 2=0(舍去)或y 1y 2=-4.所以-2a =-4,解得a =2.满足Δ>0.所以直线AB :x =ty +2.所以直线AB 过定点(2,0).S△AOB=12×2×||y1-y2=y21+y22-2y1y2=y21+y22+8≥2||y1y2+8=4.当且仅当y1=2,y2=-2或y1=-2,y2=2时,等号成立.所以△AOB面积的最小值为4.。
合肥市第八中学2023-2024学年高二上学期周测八数学试卷(PDF版,无答案)
安徽省合肥市第八中学2023年高二年级第一学期周测八一、单选题(本大题共8小题,共40.0分。
在每小题列出的选项中,选出符合题目的一项)二、多选题(本大题共4小题,共20.0分。
在每小题有多项符合题目要求)三、填空题(本大题共4小题,共20.0分)13.已知点P为直线y=√5上一动点,过点P作圆x2+y2=4的切线,切点分别为A、B,且∠APB≥90°,则动点P 的轨迹的长度为_______________14.已知动圆M与圆A:(x+4)2+y2=2外切,与圆B:(x−4)2+y2=2内切,则动圆圆心M的轨迹方程为_______________15.设P是椭圆M:x22+y2=1上的任一点,EF为圆N:x2+y2−y=0的任一条直径,则PE⃑⃑⃑⃑⃑ ⋅PF⃑⃑⃑⃑⃑ 的最大值为_______________16.已知F1,F2是双曲线x24−y212=1两个焦点,P是双曲线上的一点,且∠F1PF2=60°,则点P到y轴的距离为_______________四、解答题(本大题共3小题,共36.0分。
解答应写出文字说明,证明过程或演算步骤)17.(本小题12.0分)求适合下列条件的双曲线的标准方程:(1)双曲线过P(3,154),Q(−163,5)(2)焦点为(0,−6),(0,6),且经过(2,−5)18.(本小题12.0分)设椭圆C:x2a2+y2b2=1(a>b>0)的左顶点为A,上顶点为B,已知直线AB的斜率为12,|AB|=√5|(1)求椭圆C的方程(2)设直线l:x=my−1与椭圆C交于不同的两点M,N,且点O在以MN为直径的圆外(其中O为坐标原点),求m的取值范围19.(本小题12.0分)已知A(−2,0),B(2,0)平面内一动点P满足k PA⋅k PB=−34(1)求P点运动轨迹C的轨迹方程(2)已知直线l与曲线C交于M,N两点,当P点坐标为(1,32)时,k PM+k PN=0恒成立,试探究直线l的斜率是否为定值?若为定值请求出该定值,若不是定值请说明理由。
单县二中2021—2022学年第一学期周测卷高二数学(六)
D.若 , ,则数列 中的最小项是第9项
12.在四面体P-ABC中,以下说法正确的有()
A.若 ,则可知
B.若Q为 的重心,则
C.若四面体P-ABC各棱长都为2,M,N分别为PA,BC的中点,则
D.若 , ,则
三、填空题:共4小题,每小题5分,共20分.
13.平面 的法向量是 ,点 在平面 内,则点 到平面 的距离为______.
四、解答题:共70分.解答应写出文字说明,证明过程或演算步骤.
17.已知直线 .
(1)若直线 过点 ,且 ,求直线 的方程;
(2)若直线 ,且直线 与直线l之间的距离为 ,求直线 的方程.
18.如图所示,在直三棱柱 中, , ,棱 ,M,N分别为 , 的中点.
(1)求BN的长;
(2)求 与 所成角的余弦值;
14.过点 ,且与椭圆 有相同焦点的椭圆的标准方程为______________.
15.已知直线 与圆 相交于A、B两点(O为坐标原点),且 为等边三角形,则实数 ______.
16.我国古代,9是数字之极,代表尊贵之意,所以中国古代皇家建筑中包含许多与9相关的设计.例如,北京天坛圆丘的底面由扇环形的石板铺成(如图),最高一层的中心是一块天心石,围绕它的第圈有9块石板,从第二圈开始,每一圈比前一圈多9块共有9圈,则第六圈的石板块数是________.
A.3B.4C.5D.6
7.已知直线 ,点 , ,若直线l与线段AB相交,则m的取值范围为()
A. B. C. D.
8.程大位是我国明代著名的数学家,他的应用巨著《算法统宗》中有一首“竹筒容米”问题:“家有九节竹一茎,为因盛米不均平,下头三节六升六,上梢四节四升四,唯有中间两节竹,要将米数次第盛,若有先生能算法,也教算得到天明.”([注]六升六:6.6升.次第盛:盛米容积依次相差同一数量)用你所学的数学知识求得中间两节竹的容积为()
高二数学周测卷 (2)
2020至2021学年高二(上)数学周测试卷姓名 学号 班级一、选择题1.已知向量a 和b 的夹角为120°,且|a |=2,|b |=5,则(2a -b )·a 等于( )A .12B .8+13C .4D .132.在空间直角坐标系中,已知A (1,-2,1),B (2,2,2),点P 在z 轴上,且满足 |P A →|=|PB →|,则P 点坐标为( )A .(3,0,0)B .(0,3,0)C .(0,0,3)D .(0,0,-3)3.直线x +y -1=0被圆(x +1)2+y 2=3截得的弦长等于( ) A. 2 B .2 C .2 2 D .44.若点P (1,1)为圆x 2+y 2-6x =0的弦MN 的中点,则弦MN 所在直线的方程为( )A .2x +y -3=0B .x -2y +1=0C .x +2y -3=0D .2x -y -1=05.直线l 过点(-3,0),且与直线y =2x -3垂直,则直线l 的方程为( )A .y =-12(x -3)B .y =-12(x +3)C .y =12(x -3)D .y =12(x +3) 6.已知圆C 与直线y =-x 及x +y -4=0相切,圆心在直线y =x 上,则圆C 的方程为( )A .(x -1)2+(y -1)2=2B .(x -1)2+(y +1)2=2C .(x +1)2+(y -1)2=4D .(x +1)2+(y +1)2=47.过点P (-2,4)作圆C :(x -2)2+(y -1)2=25的切线l ,直线m :ax -3y =0与切线l 平行,则切线l 与直线m 间的距离为( )A .4B .2 C.85 D.1258.过点A (1,-1),B (-1,1),且圆心在直线x +y -2=0上的圆的方程是( )A .(x -3)2+(y +1)2=4B .(x +3)2+(y -1)2=4C .(x -1)2+(y -1)2=4D .(x +1)2+(y +1)2=49.已知圆x 2+y 2+Dx +Ey +F =0的圆心坐标为(-2,3),D ,E 分别为( )A .4,-6B .-4,-6C .-4,6D .4,610.(多选)已知圆M :(x -4)2+(y +3)2=25,则下列说法正确的是( )A .圆M 的圆心为(4,-3)B .圆M 的圆心为(-4,3)C .圆M 的半径为5D .圆M 被y 轴截得的线段长为6二、填空题11.直线l到其平行直线x-2y+4=0的距离和原点到直线l的距离相等,则直线l的方程是________.12.已知直线l1:ax-3y+1=0,l2:2x+(a+1)y+1=0.若l1⊥l2,则实数a的值为________.13.若点P(5a+1,12a)在圆(x-1)2+y2=1的外部,则a的取值范围为________.14.圆(x-1)2+(y-1)2=1上的点到直线x-y=2的距离的最大值是________.三、解答题15.若方程x2+y2+2mx-2y+m2+5m=0表示圆.(1)求实数m的取值范围;(2)写出圆心坐标和半径.16.已知A(2,2),B(5,3),C(3,-1).(1)求△ABC的外接圆的一般方程;(2)若点M(a,2)在△ABC的外接圆上,求a的值.。
2022-2023学年高二下学期周考卷A
2022-2023学年高二下学期周考试卷A生物(考试范围:人教版选择性必修2;满分90分)一、选择题:本题共25小题,每小题2分,共50分。
在每小题给出的四个选项中,只有一项符合题目要求。
1.下列叙述符合种群密度概念的是()A.一公顷水稻的年产量B.每平方米草地中杂草的数量C.某湖泊每平方米水面鲫鱼的数量D.某地区灰仓鼠每年新增的个体数2.如图表示种群数量特征之间的关系,据图分析正确的是()A.环境因素通过影响⑥来影响种群密度B.研究合肥市区人口的数量变化时应考虑①②C.利用③④可预测未来种群数量的变化趋势D.调查行道树上的蝴蝶幼虫种群密度应用标记重捕法3.用酵母菌酿酒的主要阶段为:加料→接种→通气培养→密封发酵。
从接种后到密封前这一阶段,酵母菌种群数量变化的曲线图为()4.在自然界,有些捕食者种群和猎物种群的数量变化呈现周期性的波动,如下图所示的模型。
请分析该图所示二者数量变化的关系及影响因素。
对这种现象合理的解释或概括是( )A.与种内竞争无关B.二者总是此消彼长C.与植物种群数量无关D.二者相互制约、互为因果5.貂熊是我国一级保护动物,成体重十多千克,耳小、尾短、毛长、四肢短,足掌像熊掌、掌面较大。
它经常吃狼、猎稠吃剩的食物,也捕食小型动物,在积雪环境下还能捕食大型动物。
在我国,貂熊主要分布于寒温带针叶林,以下推测成立的是()A.狼和貂熊之间是互利共生关系B.足掌面积大有利于在积雪上奔跑C.耳小、尾短、毛长不利于适应环境D.貂熊、猎狷、狼占有相同的生态位6.生物种群在群落中的功能关系和它们在时间和空间上占有的位置称为生态位。
如在同一个池塘生物群落中,鲢鱼生活在水上层,鳙鱼常栖息在水中层,青鱼通常栖息在水下层。
下列叙述正确的是()A.影响鲢鱼、鳙鱼和青鱼分布的主要因素是氧气B.鲢鱼、鳙鱼和青鱼在不同水层的分布增加了生态位的重叠C.两种生物生态位重叠越多,竞争越激烈D.生态位的分化是生物为了适应环境而发生的基因突变7.区别不同群落的重要特征是()A.物种的组成B.物种丰富度C.种间关系D.群落的季节性8.某校园有一片草坪和一片树林,下列关于这两个群落中动物分层现象的叙述,正确A.草坪和树林中的动物都具有分层现象B.草坪和树林中的动物都没有分层现象C.只有草坪和树林混杂在一起时动物才具有分层现象D.草坪中的动物没有分层现象,而树林中的动物具有分层现象9.下述古代诗句中,部分体现了非生物因素对生物的影响,其中不属于对种群数量变化产生影响的是()A.离离原上草,一岁一枯荣。
四川省遂宁中学校2022-2023学年高二下学期周考测试(一)政治试卷
遂宁中学高2024届高二下期周考一政治试题一、单选题(每题2分)1.下列选项能正确反映唯物主义三种基本形态演进顺序的是()①自然界由数目无穷、性质不同的异质元素构成(狄德罗)②眼开则花开,眼闭则花寂(王阳明)③物质决定意识,一切从实际出发,实事求是(马克思)④形存则神存,形谢则神灭(王充)A.②→①→③B.④→①→③C.②→④→③D.①→④→②2.党的十八大以来,习近平总书记反复强调坚持用马克思主义哲学教育和武装全党,强调不断接受马克思主义哲学智慧的滋养,用以武装头脑、统一思想、凝聚力量、推动实践,用新时代党的创新理论凝神聚魂。
中国特色社会主义新时代,是中华民族伟大复兴进入不可逆转历史进程的伟大时代,也必将成为马克思主义哲学大放光辉的伟大时代!这样做是基于马克思主义哲学()①对社会影响深远,能为解决社会问题提供具体方法②批判地吸收了黑格尔的辩证法和费尔巴哈的唯物论③实现了实践基础上的科学性和革命性的统一④是改变世界的科学,是的世界观和方法论的统一A.①② B.①④ C.②③ D.③④3.某本为少儿量身打造的哲学普及读物,以少儿最易接受的故事形式对哲学命题展开探讨,如“梦里的大餐能填饱肚子吗”“一只蝴蝶能引发大风暴吗”“鸡生蛋,还是蛋生鸡”等。
这些故事意在引导少儿()①感悟生活与哲学的关系②明辨具体科学与哲学的关系③爱智慧或追求智慧④厘清世界观与方法论的关系A.①② B.①③ C.②④ D.③④4.经验主义的主要特点是轻视理论,夸大感性经验,否认感性认识向理性认识飞跃的必要性,把局部经验误认为普遍真理,在实际工作中狭隘保守眼光短浅。
从哲学的角度,经验主义属于()A.古代朴素唯物主义 B.近代形而上学唯物主义C.主观唯心主义 D.客观唯心主义5.马克思哲学从诞生之日起,就不是纯学术化的,而是直面社会现实问题,顺应时代发展要求,直接或间接与无产阶段和人类解放的历史使命相联系。
这表明,马克思主义哲学()①是人类认识发展结出的丰美硕果②是无产阶级改造世界的精神武器③实现了唯物主义和辩证法的有机结合④实现了实践基础上的科学性和革命性的统一A.①② B.①③ C.②④ D.③④6.2022年2月4日,北京冬奥会即将开慕,“生命在于运动”的哲学观点更加深入人心。
高二语文周测4
2022-2023学年第二学期高二语文周测(四)考试时间:40分钟姓名:_________________一、现代文阅读(本题共4小题,18分)阅读下面的文字,完成1~4题。
听水李拓之“君王,这是什么呀?”音乐家师涓看见前面白茫茫的一片。
“那是江水啊。
”卫灵公道,“这里是濮水了。
”马在吃草,几个侍臣也拣了一块大石头坐下,卫灵公走近水边去细看,师涓不由跟过去。
月照于浩渺之川,左旁是矗立的岩谷,岸侧的芦荻摇散白色的花穗,川上一座断桥,石梁倾圮,没入水中,桥下流波泻溢。
天空有几块灰冻的云彩,舒卷而又飞奔。
柳叶缝中的哀蝉,在呜咽幽鸣,拉起了蔓草中的露虫,蟋蜂和金钟儿也啾唧啾唧的相撞。
加以岩穴中水波激荡,川谷的周围万响齐发。
于是,芦苇中闪闪流动的萤火,也纵横交错的起飞,仿佛和着虫吟水涌的节拍。
师涓倾耳去谛听:水声、风声、虫声、芦叶磨擦声……喷涌成一片。
这是宇宙的大音乐!他沉浸于音律之旋涛中,举起首,看见天宇澄澈,银河化一条萧森的白练,浮浮沉沉地也在涓涓流出无声的音响。
“君王,万有的一切在已死、将生和未生,这是夜之哀曲啊!”师涓说,他沉吟并且恬静。
“师涓!琴拿出来弹吧。
”卫灵公凄恻地。
“君王,弹不出呀,宇宙的声音要压倒琴上的声音哩。
”“师涓,你听!……谁在唱歌啊。
”卫灵公脸色突而更惨白了。
“哦……”师涓惊骇地伸长了耳朵。
真的,谁在唱歌。
那声音非常悠远,不是来自幽暗的谷穴,不是发自芦叶,而是低低忽忽地在那悠远悠远、暧昧迷离的水波弥漫之中。
水上的歌声,那是怆惋的,令人落泪的声音。
侍臣们都肃然正襟危坐了。
师涓走近沙碛,一只手按在额际,竭着目力向水面眺望。
看见浩莽空漾的月之川上,有一礁石,浮露波心,那里黑点闪动,恍惚是人影。
这时歌声很清晰,追逐着风涛飘送过来:爰采唐矣,沫之乡矣。
云谁之思?美孟姜矣。
期我乎桑中,要我乎上宫。
送我乎淇之上矣!……“哦。
师涓!这声音太悲哀了,太美丽了。
”卫灵公淤塞着鼻子说。
“君王,这样眩惑的声音,中间有多少青春和生命呀。
湖北省华中科技大学附属中学2022-2023学年高二上学期周测5数学试题
华科附中2024届高二(上)数学周测训练(5)一、单项选择题:本题共8小题,每小题5分,共40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.已知平面β法向量为()3,1,5m =-,直线l 的方向向量为()6,2,10n =--,则( )A .l 与β平行B .l 与β垂直C .l 与β相交但不垂直D .以上都不对2.在一次随机试验中,彼此互斥的事件A ,B ,C ,D 的概率分别为()0.2P A =,()0.2P B =,()0.3P C =,()0.3P D =,则下列说法正确的是( )A .AB +与C 是互斥事件,也是对立事件 B .B C +与D 是互斥事件,也是对立事件C .A C +与BD +是互斥事件,但不是对立事件 D .A 与B C D ++是互斥事件,也是对立事件3.过点A (1,2)的直线在两坐标轴上的截距之和为零,则该直线方程为( )A .x-y +1=0B .x+y-3=0C .y =2x 或x+y-3=0D .y =2x 或x-y+1=04.已知直线:10l ax by ++=过点(2,3),则( )A .点(,)a b 一定在直线10x y ++=上B .点(,)a b 一定在直线123x y +=上C .点(,)a b 一定在直线2310x y ++=上D .点(,)a b 一定在直线2360x y ++=上5.已知正方体1111ABCD A B C D -的棱长为2,,M N 分别为1BB ,CD 的中点,则MN =( )A .6B .12C .62D .326.过定点A 的直线()120a x y +-+=与过定点B 的直线()1420x a y a ++--=交于点(P P 与A B 、不重合),则PAB △面积的最大值为( )A .2B .22C .2D .47.阿波罗尼斯是古希腊著名的数学家,对圆锥曲线有深刻而系统的研究,阿波罗尼斯圆就是他的研究成果之一,指的是:已知动点M 与两定点Q ,P 的距离之比()0,1MQ MPλλλ=>≠,那么点M 的轨迹就是阿波罗尼斯圆.已知动点M 的轨迹是阿波罗尼斯圆,其方程为221x y +=,定点Q 为x 轴上一点,1,02P ⎛⎫- ⎪⎝⎭且2λ=,若点()1,1B ,则2MP MB +的最小值为( )A .6B .7C .10D .118.如图,在棱长为2的正四面体ABCD 中,点N ,M 分别为ABC 和ABD △的重心,P 为线段CM 上一点.( )A .AP BP +的最小为2B .若DP ⊥平面ABC ,则64CP CM = C .若DP ⊥平面ABC ,则三棱锥P -ABC 外接球的表面积为92π D .若F 为线段EN 的中点,且DP MF ∥,则25MP MC =二、多项选择题:本题共4小题,每小题5分,共20分.在每小题给出的选项中,有多项符合题目要求.全部选对的得5分,部分选对的得2分,有选错的得0分.9.下列叙述错误的是( )A .若事件A 发生的概率为()P A ,则0()1P A ≤≤B .分层抽样中,每个个体被抽到的可能性相等C .甲、乙、丙三位同学争着去参加一个公益活动,抽签决定谁去,则先抽的概率大些D .对于任意两个事件A 和B ,都有()()()⋃=+P A B P A P B10.如图,在棱长为1的正方体1111ABCD A B C D -中( )A .AC 与1BD 的夹角为60︒B .二面角1D ACD --的平面角的正切值为2 C .1AB 与平面1ACD 所成角的正切值2 D .点D 到平面1ACD 的距离为33 11.已知直线:20+-=l x y 与圆22:4C x y +=交于A ,B 两点,点M 为圆C 上的一动点,点()2,2N --,记M 到l 的距离为d ,则( )A .||22AB =B .d 的最大值为22C .ABN 是等腰三角形D .MN d +的最小值为3212.过直线()40x y x +=<<4上一点P 作圆O :224x y +=的两条切线,切点分别为A ,B ,直线AB 与x ,y 轴分别交于点M ,N ,则( )A .点O 恒在以线段AB 为直径的圆上B .四边形PAOB 面积的最小值为4C .AB 的最小值为22D .OM ON +的最小值为4三、填空题:本题共4小题,每小题5分,共20分.13.已知(2,4)A --,(1,5)B 两点到直线: 10l a x y ++=的距离相等,则实数a 的值为________.14.如图所示,若三个原件A ,B ,C 连接成一个系统,每个原件是否正常工作不受其他元件的影响,当原件A 正常工作且B ,C 中至少有一个正常工作时,系统就正常工作,若原件A ,B ,C 正常工作的概率依次为0.7,0.8,0.9,则这个系统正常工作的概率为___________15.如图所示,若正方形ABCD 的边长为1,PD ⊥平面ABCD ,且1PD =,E 、F 分别为AB 、BC 的中点,则直线AC 到平面PEF 的距离为__________.16.已知圆C :()()22344x y =-+-,直线1l 上定点()0A 1,,若1l 与圆相交于P ,Q 两点线段PQ 的中点为M ,又1l 与2l :220x y =++的交点为N ,则AM AN ⋅的值为___________.四、解答题:本题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.17.已知向量()2,1,2a =-,()1,4,1b =.(1)求2a b -的值;(2)求向量2a b +与a b -夹角的余弦值.18.设常数a R ∈,已知直线1l :()210a x y +++=,2l :()3430x ay a ++-=.(1)若12l l ⊥,求a 的值;(2)若12//l l ,求1l 与2l 之间的距离.19.从学校的2000名学生中随机抽取50名学生的考试成绩,被测学生成绩全部介于65 分到145分之间,将统计结果按如下方式分成八组:第一组[65,75),第二组[75,85),…,第八组[135,145],如图是按上述分组方法得到的频率分布直方图的一部分.(1)求第七组的频率;(2)用样本数据估计该校的2000名学生这次考试成绩的平均分;(3)若从样本成绩属于第六组和第八组的所有学生中随机抽取2名,求他们的分差的绝对值小于10分的概率.20.已知直线:l y x m =+与圆22:2440C x y x y +-+-=相交于A 、B 不同两点.(1)求m 的取值范围;(2)设以AB 为直径的圆经过原点,求直线l 的方程.21.如图,在四棱锥S ABCD -中,四边形ABCD 是矩形,SAD 是正三角形,且平面SAD ⊥平面ABCD ,1AB =,P 为棱AD 的中点,四棱锥S ABCD -的体积为233. (1)若E 为棱SB 的中点,求证://PE 平面SCD ;(2)在棱SA 上是否存在点M ,使得平面PMB 与平面SAD 所成锐二面角的余弦值为235?若存在,指出点M 的位置并给以证明;若不存在,请说明理由.22.已知点E 是圆C :()2234x y -+=上的动点,点()3,0F -,M 是线段EF 的中点,P (m ,0)(0m ≠)是x 轴上的一个动点.(1)求点M 的轨迹方程;(2)当点M 的轨迹上存在点Q ,使30OPQ ∠=︒,求实数m 的取值范围; (3)当1m =时,过P 作直线P A ,PB 与点M 的轨迹分别交于异于点P 的A ,B 两点,且3PA PB k k ⋅=-.求证:直线AB 恒过定点.(其中PA k ,PB k 分别为直线P A 与直线PB 的斜率).。
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哈13中学2013-2014学年度 高一上学期周练测试
学科:数学 (2013、9、12)
考试时间: 60 分钟 卷面分值: 100 分
命题人:张灵娜
注意事项:
1.答题前,务必将自己的姓名、考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,必须将答案书写在专设答题页规定的位置上。
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,只交试卷答题页。
教师寄语: 聪明在于勤奋,天才在于积累。
第Ⅰ卷(共40分)
一、选择题:(本大题共12个小题,每小题5分,共60分)
1、设}10{,3≤==x x M a ,给出下列关系:①;M a ⊆②};{a M ⊇③ ;}{M a ∈④;2M a ∉⑤}{}{a ∈φ,其中正确的关系式共有 ( ) A. 2个 B. 3个 C. 4个 D. 5个
2、设{}|02Z x x =≤≤,{}|01Y y y =≤≤,则从Z 到Y 可建立的映射的对应法则是 ( ) A. 23y x =
B.2(2)y x =-
C. 21
4
y x = D . 1y x =- 3、已知集合A={}
1
|2
+=x y y , B={}1|+=x y y , 则A B 等于 ( ) A.{}2,1,0 B.{})2,1(),1,0( C. {}1|≥x x D . R
4、设集合A ={x |1<x <4},B ={x |x 2
-2x -3≤0},则A ∩(C R B )= ( )
A .(1,4)
B .(3,4)
C .(1,3)
D .(1,2)
5、集合A={a 2,a +1,-1},B={2a -1,| a -2 |, 3a 2+4},A∩B={-1},则a 的值是 ( ) A .-1 B .0 或1 C .2 D .0
6、满足{}M
a ⊆{a,b,c,d}的集合M 共有 ( )
A .6个 B. 7个 C. 8个 D. 15
7、下列图象中表示函数图象的是 ( A B C D
8、已知集合A ={-1,1},B ={x |mx =1},且A ∪B =A ,则m 的值为 ( )
A.1
B.-1
C.1或-1
D.1或-1或0
9、集合A={}Z k k x x ∈=,2|, B={}Z
k k x x ∈+=,24|, 则有( ) A. A=B B. A B C.B A D. 以上都不是
10、设U ={1,2,3,4,5},若A ∩B ={2},(C U A )∩B ={4},(C U A )∩(C U B )={1,5},则下列结论正确的是 ( ) A.3∉∈A 且3∈B B.3∉∈B 且3∈A C.3∉A 且3∉∈B D.3∈A 且3∈B
11、设全集,R U = {}1|≥=x x M ,{}05|<>=x x x N 或,则(C U M )
(C U N )等于 ( )
A. {}10|<<x x
B.{}10|≤≤x x
C.{
}10|<≤x x D.{}10|≤<x x 1 x
y
x
y
x
y
x
y
12、已知不等式02
>++c bx ax 的解集为⎭
⎬⎫⎩⎨⎧<<-
231
x x ,则不等02<++a bx cx 的解集为 ( )
A. ⎭
⎬⎫
⎩⎨⎧<
<-213x x B. ⎭
⎬⎫⎩
⎨⎧
>-<21,3x x x 或 C. ⎭
⎬⎫⎩⎨⎧<<-312x x D. ⎭
⎬⎫⎩
⎨⎧>-<31,2x x x 或
第Ⅱ卷(共40分)
二、填空题:(本大题共4个小题,每小题5分,共20分,把答案写在答题纸中的横线上)
13 .某班有学生55人,其中音乐爱好者34人,体育爱好者43人,还有4人既不爱好体育也不爱好音乐,则班级中即爱好体育又爱好音乐的有 人. 14. 集合M={y ∣y= x 2 +1,x ∈ R },N={y ∣ y=5- x 2,x ∈ R },则M ∪N=__.
15. 设集合A={}52≤≤-x x ,B={}
121-≤≤+a x a x ,若A B ⊆.求实数a
的取值范围
16已知全集U=R,集A=}{
}
{
06|,4|2
2
≤-+=>x x x B x x 则
()_______=AUB C U 。
三、解答题:(本大题共2小题,共20分,解答应写出必要的文字说明、证明过程或演算步骤)
17、已知集合A={}
71<≤x x ,B={x|2<x<10},C={x|x<a },全集为实数集R . (Ⅰ)求A ∪B ,(C R A)∩B ;
(Ⅱ)如果A ∩C ≠φ,求a 的取值范围.
线
18、
一、选择题:(本大题共12个小题,每小题5分,共60分)
二、填空题(含4个小题,每空5分,共20分)13.14.
15.16.。